package org.jgroups.util;
import org.jgroups.*;
import org.jgroups.TimeoutException;
import org.jgroups.conf.ClassConfigurator;
import org.jgroups.jmx.JmxConfigurator;
import org.jgroups.logging.Log;
import org.jgroups.protocols.*;
import org.jgroups.protocols.pbcast.GMS;
import org.jgroups.protocols.pbcast.NAKACK2;
import org.jgroups.protocols.pbcast.STABLE;
import org.jgroups.protocols.relay.SiteMaster;
import org.jgroups.protocols.relay.SiteUUID;
import org.jgroups.stack.IpAddress;
import org.jgroups.stack.Protocol;
import org.jgroups.stack.ProtocolStack;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import java.io.*;
import java.lang.annotation.Annotation;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.*;
import java.nio.ByteBuffer;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.NumberFormat;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Collection of various utility routines that can not be assigned to other classes.
* @author Bela Ban
*/
public class Util {
private static final NumberFormat f;
private static final Map<Class<? extends Object>,Byte> PRIMITIVE_TYPES=new HashMap<Class<? extends Object>,Byte>(15);
private static final byte TYPE_NULL=0;
private static final byte TYPE_STREAMABLE=1;
private static final byte TYPE_SERIALIZABLE=2;
private static final byte TYPE_BOOLEAN=10;
private static final byte TYPE_BYTE=11;
private static final byte TYPE_CHAR=12;
private static final byte TYPE_DOUBLE=13;
private static final byte TYPE_FLOAT=14;
private static final byte TYPE_INT=15;
private static final byte TYPE_LONG=16;
private static final byte TYPE_SHORT=17;
private static final byte TYPE_STRING=18;
private static final byte TYPE_BYTEARRAY=19;
// constants
public static final int MAX_PORT=65535; // highest port allocatable
static boolean resolve_dns=false;
private static final Pattern METHOD_NAME_TO_ATTR_NAME_PATTERN=Pattern.compile("[A-Z]+");
private static final Pattern ATTR_NAME_TO_METHOD_NAME_PATTERN=Pattern.compile("_.");
protected static int CCHM_INITIAL_CAPACITY=16;
protected static float CCHM_LOAD_FACTOR=0.75f;
protected static int CCHM_CONCURRENCY_LEVEL=16;
/**
* The max size of an address list, e.g. used in View or Digest when toString() is called. Limiting this
* reduces the amount of log data
*/
public static int MAX_LIST_PRINT_SIZE=20;
public static final Class<?>[] getUnicastProtocols() {
return new Class<?>[]{UNICAST.class,UNICAST2.class,UNICAST3.class};
}
public static enum AddressScope {GLOBAL,SITE_LOCAL,LINK_LOCAL,LOOPBACK,NON_LOOPBACK}
;
private static StackType ip_stack_type=_getIpStackType();
protected static ResourceBundle resource_bundle;
static {
resource_bundle=ResourceBundle.getBundle("jg-messages",Locale.getDefault(),Util.class.getClassLoader());
/* Trying to get value of resolve_dns. PropertyPermission not granted if
* running in an untrusted environment with JNLP */
try {
resolve_dns=Boolean.valueOf(System.getProperty("resolve.dns","false"));
}
catch(SecurityException ex) {
resolve_dns=false;
}
f=NumberFormat.getNumberInstance();
f.setGroupingUsed(false);
// f.setMinimumFractionDigits(2);
f.setMaximumFractionDigits(2);
PRIMITIVE_TYPES.put(Boolean.class,TYPE_BOOLEAN);
PRIMITIVE_TYPES.put(Byte.class,TYPE_BYTE);
PRIMITIVE_TYPES.put(Character.class,TYPE_CHAR);
PRIMITIVE_TYPES.put(Double.class,TYPE_DOUBLE);
PRIMITIVE_TYPES.put(Float.class,TYPE_FLOAT);
PRIMITIVE_TYPES.put(Integer.class,TYPE_INT);
PRIMITIVE_TYPES.put(Long.class,TYPE_LONG);
PRIMITIVE_TYPES.put(Short.class,TYPE_SHORT);
PRIMITIVE_TYPES.put(String.class,TYPE_STRING);
PRIMITIVE_TYPES.put(byte[].class,TYPE_BYTEARRAY);
if(ip_stack_type == StackType.Unknown)
ip_stack_type=StackType.IPv6;
try {
String cchm_initial_capacity=System.getProperty(Global.CCHM_INITIAL_CAPACITY);
if(cchm_initial_capacity != null)
CCHM_INITIAL_CAPACITY=Integer.valueOf(cchm_initial_capacity);
}
catch(SecurityException ex) {
}
try {
String cchm_load_factor=System.getProperty(Global.CCHM_LOAD_FACTOR);
if(cchm_load_factor != null)
CCHM_LOAD_FACTOR=Float.valueOf(cchm_load_factor);
}
catch(SecurityException ex) {
}
try {
String cchm_concurrency_level=System.getProperty(Global.CCHM_CONCURRENCY_LEVEL);
if(cchm_concurrency_level != null)
CCHM_CONCURRENCY_LEVEL=Integer.valueOf(cchm_concurrency_level);
}
catch(SecurityException ex) {
}
try {
String tmp=System.getProperty(Global.MAX_LIST_PRINT_SIZE);
if(tmp != null)
MAX_LIST_PRINT_SIZE=Integer.valueOf(tmp);
}
catch(SecurityException ex) {
}
}
public static void assertTrue(boolean condition) {
assert condition;
}
public static void assertTrue(String message,boolean condition) {
if(message != null)
assert condition : message;
else
assert condition;
}
public static void assertFalse(boolean condition) {
assertFalse(null,condition);
}
public static void assertFalse(String message,boolean condition) {
if(message != null)
assert !condition : message;
else
assert !condition;
}
public static void assertEquals(String message,Object val1,Object val2) {
if(message != null) {
assert val1.equals(val2) : message;
}
else {
assert val1.equals(val2);
}
}
public static void assertEquals(Object val1,Object val2) {
assertEquals(null,val1,val2);
}
public static void assertNotNull(String message,Object val) {
if(message != null)
assert val != null : message;
else
assert val != null;
}
public static void assertNotNull(Object val) {
assertNotNull(null,val);
}
public static void assertNull(String message,Object val) {
if(message != null)
assert val == null : message;
else
assert val == null;
}
public static int getNextHigherPowerOfTwo(int num) {
if(num <= 0) return 1;
int highestBit=Integer.highestOneBit(num);
return num <= highestBit? highestBit : highestBit << 1;
}
public static String bold(String msg) {
StringBuilder sb=new StringBuilder("\033[1m");
sb.append(msg).append("\033[0m");
return sb.toString();
}
public static String getMessage(String key) {
return key != null? resource_bundle.getString(key) : null;
}
/**
* Returns a default stack for testing with transport = SHARED_LOOPBACK
* @param additional_protocols Any number of protocols to add to the top of the returned protocol list
* @return
*/
public static Protocol[] getTestStack(Protocol... additional_protocols) {
Protocol[] protocols={
new SHARED_LOOPBACK(),
new SHARED_LOOPBACK_PING().timeout(1000),
new NAKACK2(),
new UNICAST3(),
new STABLE(),
new GMS().joinTimeout(1000),
new FRAG2().fragSize(8000),
};
if(additional_protocols == null)
return protocols;
Protocol[] tmp=Arrays.copyOf(protocols,protocols.length + additional_protocols.length);
System.arraycopy(additional_protocols,0,tmp,protocols.length,additional_protocols.length);
return tmp;
}
/**
* Blocks until all channels have the same view
* @param timeout How long to wait (max in ms)
* @param interval Check every interval ms
* @param channels The channels which should form the view. The expected view size is channels.length.
* Must be non-null
*/
public static void waitUntilAllChannelsHaveSameSize(long timeout,long interval,Channel... channels) throws TimeoutException {
int size=channels.length;
if(interval >= timeout || timeout <= 0)
throw new IllegalArgumentException("interval needs to be smaller than timeout or timeout needs to be > 0");
long target_time=System.currentTimeMillis() + timeout;
while(System.currentTimeMillis() <= target_time) {
boolean all_channels_have_correct_size=true;
for(Channel ch : channels) {
View view=ch.getView();
if(view == null || view.size() != size) {
all_channels_have_correct_size=false;
break;
}
}
if(all_channels_have_correct_size)
return;
Util.sleep(interval);
}
View[] views=new View[channels.length];
StringBuilder sb=new StringBuilder();
for(int i=0; i < channels.length; i++) {
views[i]=channels[i].getView();
sb.append(channels[i].getName()).append(": ").append(views[i]).append("\n");
}
for(View view : views)
if(view == null || view.size() != size)
throw new TimeoutException("Timeout " + timeout + " kicked in, views are:\n" + sb);
}
/**
* Waits until a list has the expected number of elements. Throws an exception if not met
* @param list The list
* @param expected_size The expected size
* @param timeout The time to wait (in ms)
* @param interval The interval at which to get the size of the list (in ms)
* @param <T> The type of the list
*/
public static <T> void waitUntilListHasSize(List<T> list,int expected_size,long timeout,long interval) {
if(list == null)
throw new IllegalStateException("list is null");
long target_time=System.currentTimeMillis() + timeout;
while(System.currentTimeMillis() < target_time) {
if(list.size() == expected_size)
break;
Util.sleep(interval);
}
assert list.size() == expected_size : "list doesn't have the expected (" + expected_size + ") elements: " + list;
}
public static void setScope(Message msg,short scope) {
SCOPE.ScopeHeader hdr=SCOPE.ScopeHeader.createMessageHeader(scope);
msg.putHeader(Global.SCOPE_ID,hdr);
msg.setFlag(Message.Flag.SCOPED);
}
public static short getScope(Message msg) {
SCOPE.ScopeHeader hdr=(SCOPE.ScopeHeader)msg.getHeader(Global.SCOPE_ID);
return hdr != null? hdr.getScope() : 0;
}
public static byte[] createAuthenticationDigest(String passcode,long t1,double q1) throws IOException,
NoSuchAlgorithmException {
ByteArrayOutputStream baos=new ByteArrayOutputStream(512);
DataOutputStream out=new DataOutputStream(baos);
byte[] digest=createDigest(passcode,t1,q1);
out.writeLong(t1);
out.writeDouble(q1);
out.writeInt(digest.length);
out.write(digest);
out.flush();
return baos.toByteArray();
}
public static byte[] createDigest(String passcode,long t1,double q1)
throws IOException, NoSuchAlgorithmException {
MessageDigest md=MessageDigest.getInstance("SHA");
md.update(passcode.getBytes());
ByteBuffer bb=ByteBuffer.allocate(16); //8 bytes for long and double each
bb.putLong(t1);
bb.putDouble(q1);
md.update(bb);
return md.digest();
}
/**
* Utility method. If the dest address is IPv6, convert scoped link-local addrs into unscoped ones
* @param sock
* @param dest
* @param sock_conn_timeout
* @throws IOException
*/
public static void connect(Socket sock,SocketAddress dest,int sock_conn_timeout) throws IOException {
if(dest instanceof InetSocketAddress) {
InetAddress addr=((InetSocketAddress)dest).getAddress();
if(addr instanceof Inet6Address) {
Inet6Address tmp=(Inet6Address)addr;
if(tmp.getScopeId() != 0) {
dest=new InetSocketAddress(InetAddress.getByAddress(tmp.getAddress()),((InetSocketAddress)dest).getPort());
}
}
}
sock.connect(dest,sock_conn_timeout);
}
public static void close(Socket s) {
if(s != null) {
try {
s.close();
}
catch(Exception ex) {
}
}
}
public static void close(ServerSocket s) {
if(s != null) {
try {
s.close();
}
catch(Exception ex) {
}
}
}
public static void close(DatagramSocket my_sock) {
if(my_sock != null) {
try {
my_sock.close();
}
catch(Throwable t) {
}
}
}
public static void close(Closeable closeable) {
if(closeable != null) {
try {
closeable.close();
}
catch(Throwable t) {
}
}
}
public static void close(Closeable... closeables) {
if(closeables != null) {
for(Closeable closeable : closeables)
Util.close(closeable);
}
}
/**
* Drops messages to/from other members and then closes the channel. Note that this member won't get excluded from
* the view until failure detection has kicked in and the new coord installed the new view
*/
public static void shutdown(Channel ch) throws Exception {
DISCARD discard=new DISCARD();
discard.setLocalAddress(ch.getAddress());
discard.setDiscardAll(true);
ProtocolStack stack=ch.getProtocolStack();
TP transport=stack.getTransport();
stack.insertProtocol(discard,ProtocolStack.ABOVE,transport.getClass());
//abruptly shutdown FD_SOCK just as in real life when member gets killed non gracefully
FD_SOCK fd=(FD_SOCK)ch.getProtocolStack().findProtocol(FD_SOCK.class);
if(fd != null)
fd.stopServerSocket(false);
View view=ch.getView();
if(view != null) {
ViewId vid=view.getViewId();
List<Address> members=Arrays.asList(ch.getAddress());
ViewId new_vid=new ViewId(ch.getAddress(),vid.getId() + 1);
View new_view=new View(new_vid,members);
// inject view in which the shut down member is the only element
GMS gms=(GMS)stack.findProtocol(GMS.class);
gms.installView(new_view);
}
Util.close(ch);
}
public static byte setFlag(byte bits,byte flag) {
return bits|=flag;
}
public static boolean isFlagSet(byte bits,byte flag) {
return (bits & flag) == flag;
}
public static byte clearFlags(byte bits,byte flag) {
return bits&=~flag;
}
/**
* Creates an object from a byte buffer
*/
public static Object objectFromByteBuffer(byte[] buffer) throws Exception {
if(buffer == null) return null;
return objectFromByteBuffer(buffer,0,buffer.length);
}
public static Object objectFromByteBuffer(byte[] buffer,int offset,int length) throws Exception {
return objectFromByteBuffer(buffer, offset, length, null);
}
public static Object objectFromByteBuffer(byte[] buffer,int offset,int length, ClassLoader loader) throws Exception {
if(buffer == null) return null;
Object retval=null;
byte type=buffer[offset];
switch(type) {
case TYPE_NULL:
return null;
case TYPE_STREAMABLE:
DataInput in=new ByteArrayDataInputStream(buffer,offset + 1,length - 1);
retval=readGenericStreamable(in, loader);
break;
case TYPE_SERIALIZABLE: // the object is Externalizable or Serializable
InputStream in_stream=new ByteArrayInputStream(buffer,offset + 1,length - 1);
in=new ObjectInputStreamWithClassloader(in_stream, loader);
try {
retval=((ObjectInputStream)in).readObject();
}
finally {
Util.close((Closeable)in);
}
break;
case TYPE_BOOLEAN:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).get() == 1;
case TYPE_BYTE:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).get();
case TYPE_CHAR:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).getChar();
case TYPE_DOUBLE:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).getDouble();
case TYPE_FLOAT:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).getFloat();
case TYPE_INT:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).getInt();
case TYPE_LONG:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).getLong();
case TYPE_SHORT:
return ByteBuffer.wrap(buffer,offset + 1,length - 1).getShort();
case TYPE_STRING:
return new String(buffer,offset + 1,length - 1);
case TYPE_BYTEARRAY:
byte[] tmp=new byte[length - 1];
System.arraycopy(buffer,offset + 1,tmp,0,length - 1);
return tmp;
default:
throw new IllegalArgumentException("type " + type + " is invalid");
}
return retval;
}
/**
* Serializes/Streams an object into a byte buffer.
* The object has to implement interface Serializable or Externalizable or Streamable.
*/
public static byte[] objectToByteBuffer(Object obj) throws Exception {
if(obj == null)
return ByteBuffer.allocate(Global.BYTE_SIZE).put(TYPE_NULL).array();
if(obj instanceof Streamable) {
final ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(512);
out.write(TYPE_STREAMABLE);
writeGenericStreamable((Streamable)obj,out);
return Arrays.copyOf(out.buf,out.position());
}
Byte type=PRIMITIVE_TYPES.get(obj.getClass());
if(type == null) { // will throw an exception if object is not serializable
final ByteArrayOutputStream out_stream=new ByteArrayOutputStream(512);
out_stream.write(TYPE_SERIALIZABLE);
ObjectOutputStream out=new ObjectOutputStream(out_stream);
try {
out.writeObject(obj);
out.flush();
return out_stream.toByteArray();
}
finally {
Util.close(out);
}
}
switch(type) {
case TYPE_BOOLEAN:
return ByteBuffer.allocate(Global.BYTE_SIZE * 2).put(TYPE_BOOLEAN)
.put((Boolean)obj? (byte)1 : (byte)0).array();
case TYPE_BYTE:
return ByteBuffer.allocate(Global.BYTE_SIZE * 2).put(TYPE_BYTE).put((Byte)obj).array();
case TYPE_CHAR:
return ByteBuffer.allocate(Global.BYTE_SIZE * 3).put(TYPE_CHAR).putChar((Character)obj).array();
case TYPE_DOUBLE:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.DOUBLE_SIZE).put(TYPE_DOUBLE)
.putDouble((Double)obj).array();
case TYPE_FLOAT:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.FLOAT_SIZE).put(TYPE_FLOAT)
.putFloat((Float)obj).array();
case TYPE_INT:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.INT_SIZE).put(TYPE_INT)
.putInt((Integer)obj).array();
case TYPE_LONG:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.LONG_SIZE).put(TYPE_LONG)
.putLong((Long)obj).array();
case TYPE_SHORT:
return ByteBuffer.allocate(Global.BYTE_SIZE + Global.SHORT_SIZE).put(TYPE_SHORT)
.putShort((Short)obj).array();
case TYPE_STRING:
String str=(String)obj;
int len=str.length();
ByteBuffer retval=ByteBuffer.allocate(Global.BYTE_SIZE + len).put(TYPE_STRING);
for(int i=0; i < len; i++)
retval.put((byte)str.charAt(i));
return retval.array();
case TYPE_BYTEARRAY:
byte[] buf=(byte[])obj;
return ByteBuffer.allocate(Global.BYTE_SIZE + buf.length).put(TYPE_BYTEARRAY)
.put(buf,0,buf.length).array();
default:
throw new IllegalArgumentException("type " + type + " is invalid");
}
}
public static void objectToStream(Object obj,DataOutput out) throws Exception {
if(obj == null) {
out.write(TYPE_NULL);
return;
}
Byte type;
if(obj instanceof Streamable) { // use Streamable if we can
out.write(TYPE_STREAMABLE);
writeGenericStreamable((Streamable)obj,out);
}
else if((type=PRIMITIVE_TYPES.get(obj.getClass())) != null) {
out.write(type);
switch(type) {
case TYPE_BOOLEAN:
out.writeBoolean((Boolean)obj);
break;
case TYPE_BYTE:
out.writeByte((Byte)obj);
break;
case TYPE_CHAR:
out.writeChar((Character)obj);
break;
case TYPE_DOUBLE:
out.writeDouble((Double)obj);
break;
case TYPE_FLOAT:
out.writeFloat((Float)obj);
break;
case TYPE_INT:
out.writeInt((Integer)obj);
break;
case TYPE_LONG:
out.writeLong((Long)obj);
break;
case TYPE_SHORT:
out.writeShort((Short)obj);
break;
case TYPE_STRING:
String str=(String)obj;
if(str.length() > Short.MAX_VALUE) {
out.writeBoolean(true);
ObjectOutputStream oos=new ObjectOutputStream(out instanceof ByteArrayDataOutputStream?
new OutputStreamAdapter((ByteArrayDataOutputStream)out) :
(OutputStream)out);
try {
oos.writeObject(str);
}
finally {
oos.close();
}
}
else {
out.writeBoolean(false);
out.writeUTF(str);
}
break;
case TYPE_BYTEARRAY:
byte[] buf=(byte[])obj;
out.writeInt(buf.length);
out.write(buf,0,buf.length);
break;
default:
throw new IllegalArgumentException("type " + type + " is invalid");
}
}
else { // will throw an exception if object is not serializable
out.write(TYPE_SERIALIZABLE);
ObjectOutputStream tmp=new ObjectOutputStream(out instanceof ByteArrayDataOutputStream?
new OutputStreamAdapter((ByteArrayDataOutputStream)out) :
(OutputStream)out);
try {
tmp.writeObject(obj);
}
finally {
Util.close(tmp);
}
}
}
public static Object objectFromStream(DataInput in) throws Exception {
return objectFromStream(in, null);
}
public static Object objectFromStream(DataInput in, ClassLoader loader) throws Exception {
if(in == null) return null;
Object retval=null;
byte b=in.readByte();
switch(b) {
case TYPE_NULL:
return null;
case TYPE_STREAMABLE:
retval=readGenericStreamable(in, loader);
break;
case TYPE_SERIALIZABLE: // the object is Externalizable or Serializable
InputStream is=in instanceof ByteArrayDataInputStream?
new org.jgroups.util.InputStreamAdapter((ByteArrayDataInputStream)in) : (InputStream)in;
ObjectInputStream tmp=new ObjectInputStreamWithClassloader(is, loader);
try {
retval=tmp.readObject();
}
finally {
Util.close(tmp);
}
break;
case TYPE_BOOLEAN:
retval=in.readBoolean();
break;
case TYPE_BYTE:
retval=in.readByte();
break;
case TYPE_CHAR:
retval=in.readChar();
break;
case TYPE_DOUBLE:
retval=in.readDouble();
break;
case TYPE_FLOAT:
retval=in.readFloat();
break;
case TYPE_INT:
retval=in.readInt();
break;
case TYPE_LONG:
retval=in.readLong();
break;
case TYPE_SHORT:
retval=in.readShort();
break;
case TYPE_STRING:
if(in.readBoolean()) { // large string
ObjectInputStream ois=new ObjectInputStream(in instanceof ByteArrayDataInputStream?
new org.jgroups.util.InputStreamAdapter((ByteArrayDataInputStream)in) :
(InputStream)in);
try {
retval=ois.readObject();
}
finally {
ois.close();
}
}
else {
retval=in.readUTF();
}
break;
case TYPE_BYTEARRAY:
int len=in.readInt();
byte[] tmpbuf=new byte[len];
in.readFully(tmpbuf,0,tmpbuf.length);
retval=tmpbuf;
break;
default:
throw new IllegalArgumentException("type " + b + " is invalid");
}
return retval;
}
public static Streamable streamableFromByteBuffer(Class<? extends Streamable> cl,byte[] buffer) throws Exception {
return streamableFromByteBuffer(cl,buffer,0,buffer.length);
}
public static <T extends Streamable> Streamable streamableFromByteBuffer(Class<? extends Streamable> cl,byte[] buffer,int offset,int length) throws Exception {
if(buffer == null) return null;
DataInput in=new ByteArrayDataInputStream(buffer,offset,length);
T retval=(T)cl.newInstance();
retval.readFrom(in);
return retval;
}
public static <T extends Streamable> T streamableFromBuffer(Class<T> clazz,byte[] buffer,int offset,int length) throws Exception {
DataInput in=new ByteArrayDataInputStream(buffer,offset,length);
return (T)Util.readStreamable(clazz,in);
}
public static byte[] streamableToByteBuffer(Streamable obj) throws Exception {
final ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(512);
obj.writeTo(out);
return Arrays.copyOf(out.buffer(),out.position());
}
public static Buffer streamableToBuffer(Streamable obj) {
final ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(512);
try {
Util.writeStreamable(obj,out);
return out.getBuffer();
}
catch(Exception ex) {
return null;
}
}
public static byte[] collectionToByteBuffer(Collection<Address> c) throws Exception {
final ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(512);
Util.writeAddresses(c,out);
return Arrays.copyOf(out.buffer(),out.position());
}
public static byte[] stringToBytes(String str) {
if(str == null) return null;
byte[] retval=new byte[str.length()];
for(int i=0; i < retval.length; i++)
retval[i]=(byte)str.charAt(i);
return retval;
}
public static String bytesToString(byte[] bytes) {
return bytes != null? new String(bytes) : null;
}
/** Compares 2 byte arrays, elements are treated as unigned */
public static int compare(byte[] left,byte[] right) {
for(int i=0, j=0; i < left.length && j < right.length; i++,j++) {
int a=(left[i] & 0xff);
int b=(right[j] & 0xff);
if(a != b) {
return a - b;
}
}
return left.length - right.length;
}
public static void writeView(View view,DataOutput out) throws Exception {
if(view == null) {
out.writeBoolean(false);
return;
}
out.writeBoolean(true);
out.writeBoolean(view instanceof MergeView);
view.writeTo(out);
}
public static View readView(DataInput in) throws Exception {
if(!in.readBoolean())
return null;
boolean isMergeView=in.readBoolean();
View view;
if(isMergeView)
view=new MergeView();
else
view=new View();
view.readFrom(in);
return view;
}
public static void writeViewId(ViewId vid,DataOutput out) throws Exception {
if(vid == null) {
out.writeBoolean(false);
return;
}
out.writeBoolean(true);
vid.writeTo(out);
}
public static ViewId readViewId(DataInput in) throws Exception {
if(!in.readBoolean())
return null;
ViewId retval=new ViewId();
retval.readFrom(in);
return retval;
}
public static void writeAddress(Address addr,DataOutput out) throws Exception {
byte flags=0;
boolean streamable_addr=true;
if(addr == null) {
flags=Util.setFlag(flags,Address.NULL);
out.writeByte(flags);
return;
}
if(addr instanceof UUID) {
Class<? extends Address> clazz=addr.getClass();
if(clazz.equals(UUID.class))
flags=Util.setFlag(flags,Address.UUID_ADDR);
else if(clazz.equals(SiteUUID.class))
flags=Util.setFlag(flags,Address.SITE_UUID);
else if(clazz.equals(SiteMaster.class))
flags=Util.setFlag(flags,Address.SITE_MASTER);
else
streamable_addr=false;
}
else if(addr instanceof IpAddress)
flags=Util.setFlag(flags,Address.IP_ADDR);
else
streamable_addr=false;
out.writeByte(flags);
if(streamable_addr)
addr.writeTo(out);
else
writeOtherAddress(addr,out);
}
public static Address readAddress(DataInput in) throws Exception {
byte flags=in.readByte();
if(Util.isFlagSet(flags,Address.NULL))
return null;
Address addr;
if(Util.isFlagSet(flags,Address.UUID_ADDR)) {
addr=new UUID();
addr.readFrom(in);
}
else if(Util.isFlagSet(flags,Address.SITE_UUID)) {
addr=new SiteUUID();
addr.readFrom(in);
}
else if(Util.isFlagSet(flags,Address.SITE_MASTER)) {
addr=new SiteMaster();
addr.readFrom(in);
}
else if(Util.isFlagSet(flags,Address.IP_ADDR)) {
addr=new IpAddress();
addr.readFrom(in);
}
else {
addr=readOtherAddress(in);
}
return addr;
}
public static int size(Address addr) {
int retval=Global.BYTE_SIZE; // flags
if(addr == null)
return retval;
if(addr instanceof UUID) {
Class<? extends Address> clazz=addr.getClass();
if(clazz.equals(UUID.class) || clazz.equals(SiteUUID.class) || clazz.equals(SiteMaster.class))
return retval + addr.size();
}
if(addr instanceof IpAddress)
return retval + addr.size();
retval+=Global.SHORT_SIZE; // magic number
retval+=addr.size();
return retval;
}
public static int size(View view) {
int retval=Global.BYTE_SIZE; // presence
if(view != null)
retval+=view.serializedSize() + Global.BYTE_SIZE; // merge view or regular view
return retval;
}
public static int size(ViewId vid) {
int retval=Global.BYTE_SIZE; // presence
if(vid != null)
retval+=vid.serializedSize();
return retval;
}
public static int size(String s) {
int retval=Global.BYTE_SIZE;
if(s != null)
retval+=s.length() + 2;
return retval;
}
public static int size(byte[] buf) {
int retval=Global.BYTE_SIZE + Global.INT_SIZE;
if(buf != null)
retval+=buf.length;
return retval;
}
private static Address readOtherAddress(DataInput in) throws Exception {
short magic_number=in.readShort();
Class<?> cl=ClassConfigurator.get(magic_number);
if(cl == null)
throw new RuntimeException("class for magic number " + magic_number + " not found");
Address addr=(Address)cl.newInstance();
addr.readFrom(in);
return addr;
}
private static void writeOtherAddress(Address addr,DataOutput out) throws Exception {
short magic_number=ClassConfigurator.getMagicNumber(addr.getClass());
// write the class info
if(magic_number == -1)
throw new RuntimeException("magic number " + magic_number + " not found");
out.writeShort(magic_number);
addr.writeTo(out);
}
/**
* Writes a list of Addresses. Can contain 65K addresses at most
* @param v A Collection<Address>
* @param out
* @throws Exception
*/
public static void writeAddresses(Collection<? extends Address> v,DataOutput out) throws Exception {
if(v == null) {
out.writeShort(-1);
return;
}
out.writeShort(v.size());
for(Address addr : v) {
Util.writeAddress(addr,out);
}
}
public static void writeAddresses(final Address[] addrs,DataOutput out) throws Exception {
if(addrs == null) {
out.writeShort(-1);
return;
}
out.writeShort(addrs.length);
for(Address addr : addrs)
Util.writeAddress(addr,out);
}
/**
* @param in
* @param cl The type of Collection, e.g. ArrayList.class
* @return Collection of Address objects
* @throws Exception
*/
public static Collection<? extends Address> readAddresses(DataInput in,Class cl) throws Exception {
short length=in.readShort();
if(length < 0) return null;
Collection<Address> retval=(Collection<Address>)cl.newInstance();
Address addr;
for(int i=0; i < length; i++) {
addr=Util.readAddress(in);
retval.add(addr);
}
return retval;
}
public static Address[] readAddresses(DataInput in) throws Exception {
short length=in.readShort();
if(length < 0) return null;
Address[] retval=new Address[length];
for(int i=0; i < length; i++) {
Address addr=Util.readAddress(in);
retval[i]=addr;
}
return retval;
}
/**
* Returns the marshalled size of a Collection of Addresses.
* <em>Assumes elements are of the same type !</em>
* @param addrs Collection<Address>
* @return long size
*/
public static long size(Collection<? extends Address> addrs) {
int retval=Global.SHORT_SIZE; // number of elements
if(addrs != null && !addrs.isEmpty()) {
Address addr=addrs.iterator().next();
retval+=size(addr) * addrs.size();
}
return retval;
}
public static long size(Address[] addrs) {
int retval=Global.SHORT_SIZE; // number of elements
if(addrs != null)
for(Address addr : addrs)
retval+=Util.size(addr);
return retval;
}
public static void writeStreamable(Streamable obj,DataOutput out) throws Exception {
if(obj == null) {
out.writeBoolean(false);
return;
}
out.writeBoolean(true);
obj.writeTo(out);
}
public static Streamable readStreamable(Class clazz,DataInput in) throws Exception {
Streamable retval=null;
if(!in.readBoolean())
return null;
retval=(Streamable)clazz.newInstance();
retval.readFrom(in);
return retval;
}
public static void writeGenericStreamable(Streamable obj,DataOutput out) throws Exception {
short magic_number;
String classname;
if(obj == null) {
out.write(0);
return;
}
out.write(1);
magic_number=ClassConfigurator.getMagicNumber(obj.getClass());
out.writeShort(magic_number);
if(magic_number == -1) {
classname=obj.getClass().getName();
out.writeUTF(classname);
}
obj.writeTo(out); // write the contents
}
public static Streamable readGenericStreamable(DataInput in) throws Exception {
return readGenericStreamable(in, null);
}
public static Streamable readGenericStreamable(DataInput in, ClassLoader loader) throws Exception {
Streamable retval=null;
int b=in.readByte();
if(b == 0)
return null;
short magic_number=in.readShort();
Class<?> clazz;
if(magic_number != -1) {
clazz=ClassConfigurator.get(magic_number);
if(clazz == null)
throw new ClassNotFoundException("Class for magic number " + magic_number + " cannot be found.");
}
else {
String classname=in.readUTF();
clazz=ClassConfigurator.get(classname, loader);
}
retval=(Streamable)clazz.newInstance();
retval.readFrom(in);
return retval;
}
public static void writeClass(Class<?> classObject,DataOutput out) throws Exception {
short magic_number=ClassConfigurator.getMagicNumber(classObject);
// write the magic number or the class name
if(magic_number == -1) {
out.writeBoolean(false);
out.writeUTF(classObject.getName());
}
else {
out.writeBoolean(true);
out.writeShort(magic_number);
}
}
public static Class<?> readClass(DataInput in) throws Exception {
Class<?> clazz;
boolean use_magic_number=in.readBoolean();
if(use_magic_number) {
short magic_number=in.readShort();
clazz=ClassConfigurator.get(magic_number);
if(clazz == null)
throw new ClassNotFoundException("Class for magic number " + magic_number + " cannot be found.");
}
else {
String classname=in.readUTF();
clazz=ClassConfigurator.get(classname);
}
return clazz;
}
public static void writeObject(Object obj,DataOutput out) throws Exception {
if(obj instanceof Streamable) {
out.writeInt(-1);
writeGenericStreamable((Streamable)obj,out);
}
else {
byte[] buf=objectToByteBuffer(obj);
out.writeInt(buf.length);
out.write(buf,0,buf.length);
}
}
public static Object readObject(DataInput in) throws Exception {
int len=in.readInt();
if(len == -1)
return readGenericStreamable(in);
byte[] buf=new byte[len];
in.readFully(buf,0,len);
return objectFromByteBuffer(buf);
}
public static String readFile(String filename) throws FileNotFoundException {
FileInputStream in=new FileInputStream(filename);
try {
return readContents(in);
}
finally {
Util.close(in);
}
}
public static String readContents(InputStream input) {
StringBuilder sb=new StringBuilder();
int ch;
while(true) {
try {
ch=input.read();
if(ch != -1)
sb.append((char)ch);
else
break;
}
catch(IOException e) {
break;
}
}
return sb.toString();
}
public static byte[] readFileContents(InputStream input) throws IOException {
byte contents[]=new byte[10000], buf[]=new byte[1024];
InputStream in=new BufferedInputStream(input);
int bytes_read=0;
for(; ; ) {
int tmp=in.read(buf,0,buf.length);
if(tmp == -1)
break;
System.arraycopy(buf,0,contents,bytes_read,tmp);
bytes_read+=tmp;
}
byte[] retval=new byte[bytes_read];
System.arraycopy(contents,0,retval,0,bytes_read);
return retval;
}
/** Returns whitespace-separated strings from the input stream, or null if the end of the stream has been reached */
public static String readToken(InputStream in) {
StringBuilder sb=new StringBuilder();
boolean first=true;
int ch;
while(true) {
try {
ch=in.read();
if(ch == -1)
return sb.length() > 0? sb.toString() : null;
if(Character.isWhitespace(ch)) {
if(first)
continue;
break;
}
sb.append((char)ch);
first=false;
}
catch(IOException e) {
break;
}
}
return sb.toString();
}
public static String readStringFromStdin(String message) throws Exception {
System.out.print(message);
System.out.flush();
System.in.skip(System.in.available());
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
return reader.readLine().trim();
}
public static long readLongFromStdin(String message) throws Exception {
String tmp=readStringFromStdin(message);
return Long.parseLong(tmp);
}
public static double readDoubleFromStdin(String message) throws Exception {
String tmp=readStringFromStdin(message);
return Double.parseDouble(tmp);
}
public static int readIntFromStdin(String message) throws Exception {
String tmp=readStringFromStdin(message);
return Integer.parseInt(tmp);
}
public static void writeByteBuffer(byte[] buf,DataOutput out) throws Exception {
writeByteBuffer(buf,0,buf.length,out);
}
public static void writeByteBuffer(byte[] buf,int offset,int length,DataOutput out) throws Exception {
if(buf != null) {
out.write(1);
out.writeInt(length);
out.write(buf,offset,length);
}
else {
out.write(0);
}
}
public static byte[] readByteBuffer(DataInput in) throws Exception {
int b=in.readByte();
if(b == 1) {
b=in.readInt();
byte[] buf=new byte[b];
in.readFully(buf,0,buf.length);
return buf;
}
return null;
}
public static Buffer messageToByteBuffer(Message msg) throws Exception {
ByteArrayDataOutputStream out=new ByteArrayDataOutputStream(512);
out.writeBoolean(msg != null);
if(msg != null)
msg.writeTo(out);
return out.getBuffer();
}
public static Message byteBufferToMessage(byte[] buffer,int offset,int length) throws Exception {
DataInput in=new ByteArrayDataInputStream(buffer,offset,length);
if(!in.readBoolean())
return null;
Message msg=new Message(false); // don't create headers, readFrom() will do this
msg.readFrom(in);
return msg;
}
public static <T> boolean match(T obj1,T obj2) {
if(obj1 == null && obj2 == null)
return true;
if(obj1 != null)
return obj1.equals(obj2);
else
return obj2.equals(obj1);
}
public static boolean match(long[] a1,long[] a2) {
if(a1 == null && a2 == null)
return true;
if(a1 == null || a2 == null)
return false;
if(a1.hashCode() == a2.hashCode()) // identity
return true;
// at this point, a1 != null and a2 != null
if(a1.length != a2.length)
return false;
for(int i=0; i < a1.length; i++) {
if(a1[i] != a2[i])
return false;
}
return true;
}
public static boolean patternMatch(String pattern,String str) {
Pattern pat=Pattern.compile(pattern);
Matcher matcher=pat.matcher(str);
return matcher.matches();
}
public static <T> boolean different(T one,T two) {
return !match(one,two);
}
/** Sleep for timeout msecs. Returns when timeout has elapsed or thread was interrupted */
public static void sleep(long timeout) {
try {
Thread.sleep(timeout);
}
catch(InterruptedException e) {
Thread.currentThread().interrupt();
}
}
public static void sleep(long timeout,int nanos) {
//the Thread.sleep method is not precise at all regarding nanos
if(timeout > 0 || nanos > 900000) {
try {
Thread.sleep(timeout + (nanos / 1000000),(nanos % 1000000));
}
catch(InterruptedException e) {
Thread.currentThread().interrupt();
}
}
else {
//this isn't a superb metronome either, but allows a granularity
//with a reasonable precision in the order of 50ths of millisecond
long initialTime=System.nanoTime() - 200;
while(System.nanoTime() < initialTime + nanos) ;
}
}
/**
* On most UNIX systems, the minimum sleep time is 10-20ms. Even if we specify sleep(1), the thread will
* sleep for at least 10-20ms. On Windows, sleep() seems to be implemented as a busy sleep, that is the
* thread never relinquishes control and therefore the sleep(x) is exactly x ms long.
*/
public static void sleep(long msecs,boolean busy_sleep) {
if(!busy_sleep) {
sleep(msecs);
return;
}
long start=System.currentTimeMillis();
long stop=start + msecs;
while(stop > start) {
start=System.currentTimeMillis();
}
}
public static int keyPress(String msg) {
System.out.println(msg);
try {
int ret=System.in.read();
System.in.skip(System.in.available());
return ret;
}
catch(IOException e) {
return 0;
}
}
/** Returns a random value in the range [1 - range] */
public static long random(long range) {
return (long)((Math.random() * range) % range) + 1;
}
/** Sleeps between floor and ceiling milliseconds, chosen randomly */
public static void sleepRandom(long floor,long ceiling) {
if(ceiling - floor <= 0) {
return;
}
long diff=ceiling - floor;
long r=(int)((Math.random() * 100000) % diff) + floor;
sleep(r);
}
/**
* Tosses a coin weighted with probability and returns true or false. Example: if probability=0.8,
* chances are that in 80% of all cases, true will be returned and false in 20%.
*/
public static boolean tossWeightedCoin(double probability) {
long r=random(100);
long cutoff=(long)(probability * 100);
return r < cutoff;
}
public static String dumpThreads() {
StringBuilder sb=new StringBuilder();
ThreadMXBean bean=ManagementFactory.getThreadMXBean();
long[] ids=bean.getAllThreadIds();
_printThreads(bean,ids,sb);
long[] deadlocks=bean.findDeadlockedThreads();
if(deadlocks != null && deadlocks.length > 0) {
sb.append("deadlocked threads:\n");
_printThreads(bean,deadlocks,sb);
}
deadlocks=bean.findMonitorDeadlockedThreads();
if(deadlocks != null && deadlocks.length > 0) {
sb.append("monitor deadlocked threads:\n");
_printThreads(bean,deadlocks,sb);
}
return sb.toString();
}
protected static void _printThreads(ThreadMXBean bean,long[] ids,StringBuilder sb) {
ThreadInfo[] threads=bean.getThreadInfo(ids,20);
for(ThreadInfo info : threads) {
if(info == null)
continue;
sb.append(info.getThreadName()).append(":\n");
StackTraceElement[] stack_trace=info.getStackTrace();
for(StackTraceElement el : stack_trace) {
sb.append(" at ").append(el.getClassName()).append(".").append(el.getMethodName());
sb.append("(").append(el.getFileName()).append(":").append(el.getLineNumber()).append(")");
sb.append("\n");
}
sb.append("\n\n");
}
}
public static boolean interruptAndWaitToDie(Thread t) {
return interruptAndWaitToDie(t,Global.THREAD_SHUTDOWN_WAIT_TIME);
}
public static boolean interruptAndWaitToDie(Thread t,long timeout) {
if(t == null)
throw new IllegalArgumentException("Thread can not be null");
t.interrupt(); // interrupts the sleep()
try {
t.join(timeout);
}
catch(InterruptedException e) {
Thread.currentThread().interrupt(); // set interrupt flag again
}
return t.isAlive();
}
/**
* Debugging method used to dump the content of a protocol queue in a
* condensed form. Useful to follow the evolution of the queue's content in
* time.
*/
public static String dumpQueue(Queue q) {
StringBuilder sb=new StringBuilder();
Collection values=q.values();
if(values.isEmpty()) {
sb.append("empty");
}
else {
for(Object o : values) {
String s=null;
if(o instanceof Event) {
Event event=(Event)o;
int type=event.getType();
s=Event.type2String(type);
if(type == Event.VIEW_CHANGE)
s+=" " + event.getArg();
if(type == Event.MSG)
s+=" " + event.getArg();
if(type == Event.MSG) {
s+="[";
Message m=(Message)event.getArg();
Map<Short,Header> headers=new HashMap<Short,Header>(m.getHeaders());
for(Map.Entry<Short,Header> entry : headers.entrySet()) {
short id=entry.getKey();
Header value=entry.getValue();
String headerToString=null;
if(value instanceof FD.FdHeader) {
headerToString=value.toString();
}
else if(value instanceof PingHeader) {
headerToString=ClassConfigurator.getProtocol(id) + "-";
if(((PingHeader)value).type() == PingHeader.GET_MBRS_REQ) {
headerToString+="GMREQ";
}
else if(((PingHeader)value).type() == PingHeader.GET_MBRS_RSP) {
headerToString+="GMRSP";
}
else {
headerToString+="UNKNOWN";
}
}
else {
headerToString=ClassConfigurator.getProtocol(id) + "-" + (value == null? "null" : value.toString());
}
s+=headerToString;
s+=" ";
}
s+="]";
}
}
else {
s=o.toString();
}
sb.append(s).append("\n");
}
}
return sb.toString();
}
public static String mapToString(Map<? extends Object,? extends Object> map) {
if(map == null)
return "null";
StringBuilder sb=new StringBuilder();
for(Map.Entry<? extends Object,? extends Object> entry : map.entrySet()) {
Object key=entry.getKey();
Object val=entry.getValue();
sb.append(key).append("=");
if(val == null)
sb.append("null");
else
sb.append(val);
sb.append("\n");
}
return sb.toString();
}
/**
* MByte nowadays doesn't mean 1024 * 1024 bytes, but 1 million bytes, see http://en.wikipedia.org/wiki/Megabyte
* @param bytes
* @return
*/
public static String printBytes(long bytes) {
double tmp;
if(bytes < 1000)
return bytes + "b";
if(bytes < 1000000) {
tmp=bytes / 1000.0;
return f.format(tmp) + "KB";
}
if(bytes < 1000000000) {
tmp=bytes / 1000000.0;
return f.format(tmp) + "MB";
}
else {
tmp=bytes / 1000000000.0;
return f.format(tmp) + "GB";
}
}
public static String printTime(long time,TimeUnit unit) {
long ns=TimeUnit.NANOSECONDS.convert(time,unit);
long us=TimeUnit.MICROSECONDS.convert(time,unit);
long ms=TimeUnit.MILLISECONDS.convert(time,unit);
long secs=TimeUnit.SECONDS.convert(time,unit);
if(secs > 0) return secs + "s";
if(ms > 0) return ms + "ms";
if(us > 0) return us + " us";
return ns + "ns";
}
public static String format(double value) {
return f.format(value);
}
public static long readBytesLong(String input) {
Tuple<String,Long> tuple=readBytes(input);
double num=Double.parseDouble(tuple.getVal1());
return (long)(num * tuple.getVal2());
}
public static int readBytesInteger(String input) {
Tuple<String,Long> tuple=readBytes(input);
double num=Double.parseDouble(tuple.getVal1());
return (int)(num * tuple.getVal2());
}
public static double readBytesDouble(String input) {
Tuple<String,Long> tuple=readBytes(input);
double num=Double.parseDouble(tuple.getVal1());
return num * tuple.getVal2();
}
private static Tuple<String,Long> readBytes(String input) {
input=input.trim().toLowerCase();
int index=-1;
long factor=1;
if((index=input.indexOf("k")) != -1)
factor=1000;
else if((index=input.indexOf("kb")) != -1)
factor=1000;
else if((index=input.indexOf("m")) != -1)
factor=1000000;
else if((index=input.indexOf("mb")) != -1)
factor=1000000;
else if((index=input.indexOf("g")) != -1)
factor=1000000000;
else if((index=input.indexOf("gb")) != -1)
factor=1000000000;
String str=index != -1? input.substring(0,index) : input;
return new Tuple<String,Long>(str,factor);
}
public static String printBytes(double bytes) {
double tmp;
if(bytes < 1000)
return bytes + "b";
if(bytes < 1000000) {
tmp=bytes / 1000.0;
return f.format(tmp) + "KB";
}
if(bytes < 1000000000) {
tmp=bytes / 1000000.0;
return f.format(tmp) + "MB";
}
else {
tmp=bytes / 1000000000.0;
return f.format(tmp) + "GB";
}
}
public static String[] components(String path,String separator) {
if(path == null || path.isEmpty())
return null;
String[] tmp=path.split(separator + "+"); // multiple separators could be present
if(tmp == null)
return null;
if(tmp.length == 0)
return null;
if(tmp[0].isEmpty())
tmp[0]=separator;
return tmp;
}
/**
* Fragments a byte buffer into smaller fragments of (max.) frag_size.
* Example: a byte buffer of 1024 bytes and a frag_size of 248 gives 4 fragments
* of 248 bytes each and 1 fragment of 32 bytes.
* @return An array of byte buffers (<code>byte[]</code>).
*/
public static byte[][] fragmentBuffer(byte[] buf,int frag_size,final int length) {
byte[] retval[];
int accumulated_size=0;
byte[] fragment;
int tmp_size=0;
int num_frags;
int index=0;
num_frags=length % frag_size == 0? length / frag_size : length / frag_size + 1;
retval=new byte[num_frags][];
while(accumulated_size < length) {
if(accumulated_size + frag_size <= length)
tmp_size=frag_size;
else
tmp_size=length - accumulated_size;
fragment=new byte[tmp_size];
System.arraycopy(buf,accumulated_size,fragment,0,tmp_size);
retval[index++]=fragment;
accumulated_size+=tmp_size;
}
return retval;
}
/**
* Given a buffer and a fragmentation size, compute a list of fragmentation offset/length pairs, and
* return them in a list. Example:<br/>
* Buffer is 10 bytes, frag_size is 4 bytes. Return value will be ({0,4}, {4,4}, {8,2}).
* This is a total of 3 fragments: the first fragment starts at 0, and has a length of 4 bytes, the second fragment
* starts at offset 4 and has a length of 4 bytes, and the last fragment starts at offset 8 and has a length
* of 2 bytes.
* @param frag_size
* @return List. A List<Range> of offset/length pairs
*/
public static List<Range> computeFragOffsets(int offset,int length,int frag_size) {
List<Range> retval=new ArrayList<Range>();
long total_size=length + offset;
int index=offset;
int tmp_size=0;
Range r;
while(index < total_size) {
if(index + frag_size <= total_size)
tmp_size=frag_size;
else
tmp_size=(int)(total_size - index);
r=new Range(index,tmp_size);
retval.add(r);
index+=tmp_size;
}
return retval;
}
public static List<Range> computeFragOffsets(byte[] buf,int frag_size) {
return computeFragOffsets(0,buf.length,frag_size);
}
/**
* Concatenates smaller fragments into entire buffers.
* @param fragments An array of byte buffers (<code>byte[]</code>)
* @return A byte buffer
*/
public static byte[] defragmentBuffer(byte[] fragments[]) {
int total_length=0;
byte[] ret;
int index=0;
if(fragments == null) return null;
for(int i=0; i < fragments.length; i++) {
if(fragments[i] == null) continue;
total_length+=fragments[i].length;
}
ret=new byte[total_length];
for(int i=0; i < fragments.length; i++) {
if(fragments[i] == null) continue;
System.arraycopy(fragments[i],0,ret,index,fragments[i].length);
index+=fragments[i].length;
}
return ret;
}
/** Returns true if all elements in the collection are the same */
public static <T> boolean allEqual(Collection<T> elements) {
if(elements.isEmpty())
return false;
Iterator<T> it=elements.iterator();
T first=it.next();
while(it.hasNext()) {
T el=it.next();
if(!el.equals(first))
return false;
}
return true;
}
public static <T> String printListWithDelimiter(Collection<T> list,String delimiter) {
return printListWithDelimiter(list,delimiter,MAX_LIST_PRINT_SIZE,true);
}
public static <T> String printListWithDelimiter(Collection<T> list,String delimiter,int limit) {
return printListWithDelimiter(list,delimiter,limit,true);
}
public static <T> String printListWithDelimiter(Collection<T> list,String delimiter,int limit,boolean print_size) {
boolean first=true;
int count=0, size=print_size? list.size() : 0;
StringBuilder sb=new StringBuilder(print_size? "(" + size + ") " : "");
for(T el : list) {
if(first)
first=false;
else
sb.append(delimiter);
sb.append(el);
if(limit > 0 && ++count >= limit) {
if(size > count)
sb.append(" ..."); // .append(list.size()).append("...");
break;
}
}
return sb.toString();
}
public static <T> String printListWithDelimiter(T[] list,String delimiter,int limit) {
boolean first=true;
StringBuilder sb=new StringBuilder();
int count=0, size=list.length;
for(T el : list) {
if(first)
first=false;
else
sb.append(delimiter);
sb.append(el);
if(limit > 0 && ++count >= limit) {
if(size > count)
sb.append(" ..."); // .append(list.length).append("...");
break;
}
}
return sb.toString();
}
public static <T> String printMapWithDelimiter(Map<T,T> map,String delimiter) {
boolean first=true;
StringBuilder sb=new StringBuilder();
for(Map.Entry<T,T> entry : map.entrySet()) {
if(first)
first=false;
else
sb.append(delimiter);
sb.append(entry.getKey()).append("=").append(entry.getValue());
}
return sb.toString();
}
/** Returns true if all elements of c match obj */
public static boolean all(Collection c,Object obj) {
for(Iterator iterator=c.iterator(); iterator.hasNext(); ) {
Object o=iterator.next();
if(!o.equals(obj))
return false;
}
return true;
}
public static List<Address> leftMembers(Collection<Address> old_list,Collection<Address> new_list) {
if(old_list == null || new_list == null)
return null;
List<Address> retval=new ArrayList<Address>(old_list);
retval.removeAll(new_list);
return retval;
}
public static List<Address> newMembers(List<Address> old_list,List<Address> new_list) {
if(old_list == null || new_list == null)
return null;
List<Address> retval=new ArrayList<Address>(new_list);
retval.removeAll(old_list);
return retval;
}
public static <T> List<T> newElements(List<T> old_list,List<T> new_list) {
if(new_list == null)
return new ArrayList<T>();
List<T> retval=new ArrayList<T>(new_list);
if(old_list != null)
retval.removeAll(old_list);
return retval;
}
/**
* Selects a random subset of members according to subset_percentage and returns them.
* Picks no member twice from the same membership. If the percentage is smaller than 1 -> picks 1 member.
*/
public static List<Address> pickSubset(List<Address> members,double subset_percentage) {
List<Address> ret=new ArrayList<Address>(), tmp_mbrs;
int num_mbrs=members.size(), subset_size, index;
if(num_mbrs == 0) return ret;
subset_size=(int)Math.ceil(num_mbrs * subset_percentage);
tmp_mbrs=new ArrayList<Address>(members);
for(int i=subset_size; i > 0 && !tmp_mbrs.isEmpty(); i--) {
index=(int)((Math.random() * num_mbrs) % tmp_mbrs.size());
ret.add(tmp_mbrs.get(index));
tmp_mbrs.remove(index);
}
return ret;
}
public static <T> boolean contains(T key,T[] list) {
if(list == null) return false;
for(T tmp : list)
if(tmp == key || tmp.equals(key))
return true;
return false;
}
public static boolean containsViewId(Collection<View> views,ViewId vid) {
for(View view : views) {
ViewId tmp=view.getViewId();
if(tmp.equals(vid))
return true;
}
return false;
}
public static boolean containsId(short id,short[] ids) {
if(ids == null)
return false;
for(short tmp : ids)
if(tmp == id)
return true;
return false;
}
public static List<View> detectDifferentViews(Map<Address,View> map) {
final List<View> ret=new ArrayList<View>();
for(View view : map.values()) {
if(view == null)
continue;
ViewId vid=view.getViewId();
if(!Util.containsViewId(ret,vid))
ret.add(view);
}
return ret;
}
/**
* Determines the members which take part in a merge. The resulting list consists of all merge coordinators
* plus members outside a merge partition, e.g. for views A={B,A,C}, B={B,C} and C={B,C}, the merge coordinator
* is B, but the merge participants are B and A.
* @param map
* @return
*/
public static Collection<Address> determineMergeParticipants(Map<Address,View> map) {
Set<Address> coords=new HashSet<Address>();
Set<Address> all_addrs=new HashSet<Address>();
if(map == null)
return Collections.emptyList();
for(View view : map.values())
all_addrs.addAll(view.getMembers());
for(View view : map.values()) {
Address coord=view.getCreator();
if(coord != null)
coords.add(coord);
}
for(Address coord : coords) {
View view=map.get(coord);
Collection<Address> mbrs=view != null? view.getMembers() : null;
if(mbrs != null)
all_addrs.removeAll(mbrs);
}
coords.addAll(all_addrs);
return coords;
}
/**
* This is the same or a subset of {@link #determineMergeParticipants(java.util.Map)} and contains only members
* which are currently sub-partition coordinators.
* @param map
* @return
*/
public static Collection<Address> determineMergeCoords(Map<Address,View> map) {
Set<Address> retval=new HashSet<Address>();
if(map != null) {
for(View view : map.values()) {
Address coord=view.getCreator();
if(coord != null)
retval.add(coord);
}
}
return retval;
}
/**
* Similar to {@link #determineMergeCoords(java.util.Map)} but only actual coordinators are counted: an actual
* coord is when the sender of a view is the first member of that view
* @param map
* @return
*/
public static Collection<Address> determineActualMergeCoords(Map<Address,View> map) {
Set<Address> retval=new HashSet<Address>();
if(map != null) {
for(Map.Entry<Address,View> entry : map.entrySet()) {
Address sender=entry.getKey();
List<Address> members=entry.getValue().getMembers();
Address actual_coord=members.isEmpty()? null : members.get(0);
if(sender.equals(actual_coord))
retval.add(sender);
}
}
return retval;
}
/**
* Returns the rank of a member in a given view
* @param view The view
* @param addr The address of a member
* @return A value between 1 and view.size(). The first member has rank 1, the second 2 and so on. If the
* member is not found, 0 is returned
*/
public static int getRank(View view,Address addr) {
if(view == null || addr == null)
return 0;
List<Address> members=view.getMembers();
for(int i=0; i < members.size(); i++) {
Address mbr=members.get(i);
if(mbr.equals(addr))
return i + 1;
}
return 0;
}
public static int getRank(Collection<Address> members,Address addr) {
if(members == null || addr == null)
return -1;
int index=0;
for(Iterator<Address> it=members.iterator(); it.hasNext(); ) {
Address mbr=it.next();
if(mbr.equals(addr))
return index + 1;
index++;
}
return -1;
}
public static <T> T pickRandomElement(List<T> list) {
if(list == null) return null;
int size=list.size();
int index=(int)((Math.random() * size * 10) % size);
return list.get(index);
}
public static <T> T pickRandomElement(T[] array) {
if(array == null) return null;
int size=array.length;
int index=(int)((Math.random() * size * 10) % size);
return array[index];
}
/**
* Returns the object next to element in list
* @param list
* @param obj
* @param <T>
* @return
*/
public static <T> T pickNext(List<T> list,T obj) {
if(list == null || obj == null)
return null;
Object[] array=list.toArray();
for(int i=0; i < array.length; i++) {
T tmp=(T)array[i];
if(tmp != null && tmp.equals(obj))
return (T)array[(i + 1) % array.length];
}
return null;
}
/** Returns the next min(N,list.size()) elements after obj */
public static <T> List<T> pickNext(List<T> list,T obj,int num) {
List<T> retval=new ArrayList<T>();
if(list == null || list.size() < 2)
return retval;
int index=list.indexOf(obj);
if(index != -1) {
for(int i=1; i <= num && i < list.size(); i++) {
T tmp=list.get((index + i) % list.size());
if(!retval.contains(tmp))
retval.add(tmp);
}
}
return retval;
}
public static JChannel createChannel(Protocol... prots) throws Exception {
JChannel ch=new JChannel(false);
ProtocolStack stack=new ProtocolStack();
ch.setProtocolStack(stack);
for(Protocol prot : prots) {
stack.addProtocol(prot);
prot.setProtocolStack(stack);
}
stack.init();
return ch;
}
public static Address createRandomAddress() {
return createRandomAddress(generateLocalName());
}
/** Returns an array of num random addresses, named A, B, C etc */
public static Address[] createRandomAddresses(int num) {
return createRandomAddresses(num,false);
}
public static Address[] createRandomAddresses(int num,boolean use_numbers) {
Address[] addresses=new Address[num];
int number=1;
char c='A';
for(int i=0; i < addresses.length; i++)
addresses[i]=Util.createRandomAddress(use_numbers? String.valueOf(number++) : String.valueOf(c++));
return addresses;
}
public static Address createRandomAddress(String name) {
UUID retval=UUID.randomUUID();
UUID.add(retval,name);
return retval;
}
public static Object[][] createTimer() {
return new Object[][]{
{new DefaultTimeScheduler(5)},
{new TimeScheduler2()},
{new TimeScheduler3()},
{new HashedTimingWheel(5)}
};
}
/**
* Returns all members that left between 2 views. All members that are element of old_mbrs but not element of
* new_mbrs are returned.
*/
public static List<Address> determineLeftMembers(List<Address> old_mbrs,List<Address> new_mbrs) {
List<Address> retval=new ArrayList<Address>();
if(old_mbrs == null || new_mbrs == null)
return retval;
for(int i=0; i < old_mbrs.size(); i++) {
Address mbr=old_mbrs.get(i);
if(!new_mbrs.contains(mbr))
retval.add(mbr);
}
return retval;
}
public static String printViews(Collection<View> views) {
StringBuilder sb=new StringBuilder();
boolean first=true;
for(View view : views) {
if(first)
first=false;
else
sb.append(", ");
sb.append(view.getViewId());
}
return sb.toString();
}
public static <T> String print(Collection<T> objs) {
StringBuilder sb=new StringBuilder();
boolean first=true;
for(T obj : objs) {
if(first)
first=false;
else
sb.append(", ");
sb.append(obj);
}
return sb.toString();
}
public static <T> String print(Map<T,T> map) {
StringBuilder sb=new StringBuilder();
boolean first=true;
for(Map.Entry<T,T> entry : map.entrySet()) {
if(first)
first=false;
else
sb.append(", ");
sb.append(entry.getKey()).append("=").append(entry.getValue());
}
return sb.toString();
}
public static String printPingData(List<PingData> rsps) {
StringBuilder sb=new StringBuilder();
if(rsps != null) {
int total=rsps.size();
int servers=0, clients=0, coords=0;
for(PingData rsp : rsps) {
if(rsp.isCoord())
coords++;
if(rsp.isServer())
servers++;
else
clients++;
}
sb.append(total + " total (" + servers + " servers (" + coords + " coord), " + clients + " clients)");
}
return sb.toString();
}
/**
* Tries to load the class from the current thread's context class loader. If
* not successful, tries to load the class from the current instance.
* @param classname Desired class.
* @param clazz Class object used to obtain a class loader
* if no context class loader is available.
* @return Class, or null on failure.
*/
public static Class loadClass(String classname,Class clazz) throws ClassNotFoundException {
return loadClass(classname, clazz.getClassLoader());
}
/**
* Tries to load the class from the preferred loader. If not successful, tries to
* load the class from the current thread's context class loader or system class loader.
* @param classname Desired class name.
* @param preferredLoader The preferred class loader
* @return the loaded class.
* @throws ClassNotFoundException if the class could not be loaded by any loader
*/
public static Class<?> loadClass(String classname, ClassLoader preferredLoader) throws ClassNotFoundException {
ClassNotFoundException exception = null;
for (ClassLoader loader: Arrays.asList(preferredLoader, Thread.currentThread().getContextClassLoader(), ClassLoader.getSystemClassLoader())) {
try {
return loader.loadClass(classname);
} catch (ClassNotFoundException e) {
if (exception == null) {
exception = e;
}
}
}
throw exception;
}
public static Field[] getAllDeclaredFields(final Class clazz) {
return getAllDeclaredFieldsWithAnnotations(clazz);
}
public static Field[] getAllDeclaredFieldsWithAnnotations(final Class clazz,Class<? extends Annotation>... annotations) {
List<Field> list=new ArrayList<Field>(30);
for(Class curr=clazz; curr != null; curr=curr.getSuperclass()) {
Field[] fields=curr.getDeclaredFields();
if(fields != null) {
for(Field field : fields) {
if(annotations != null && annotations.length > 0) {
for(Class<? extends Annotation> annotation : annotations) {
if(field.isAnnotationPresent(annotation))
list.add(field);
}
}
else
list.add(field);
}
}
}
Field[] retval=new Field[list.size()];
for(int i=0; i < list.size(); i++)
retval[i]=list.get(i);
return retval;
}
public static Method[] getAllDeclaredMethodsWithAnnotations(final Class clazz,Class<? extends Annotation>... annotations) {
List<Method> list=new ArrayList<Method>(30);
for(Class curr=clazz; curr != null; curr=curr.getSuperclass()) {
Method[] methods=curr.getDeclaredMethods();
if(methods != null) {
for(Method method : methods) {
if(annotations != null && annotations.length > 0) {
for(Class<? extends Annotation> annotation : annotations) {
if(method.isAnnotationPresent(annotation))
list.add(method);
}
}
else
list.add(method);
}
}
}
Method[] retval=new Method[list.size()];
for(int i=0; i < list.size(); i++)
retval[i]=list.get(i);
return retval;
}
public static <A extends Annotation> A getAnnotation(Class<?> clazz, Class<A> annotationClass) {
for(Class<?> curr=clazz; curr != null; curr=curr.getSuperclass()) {
A ann=curr.getAnnotation(annotationClass);
if(ann != null)
return ann;
}
return null;
}
public static Field getField(final Class clazz, String field_name) {
if(clazz == null || field_name == null)
return null;
Field field=null;
for(Class curr=clazz; curr != null; curr=curr.getSuperclass()) {
try {
return curr.getDeclaredField(field_name);
}
catch(NoSuchFieldException e) {
}
}
return field;
}
public static void setField(Field field,Object target,Object value) {
if(!Modifier.isPublic(field.getModifiers())) {
field.setAccessible(true);
}
try {
field.set(target,value);
}
catch(IllegalAccessException iae) {
throw new IllegalArgumentException("Could not set field " + field,iae);
}
}
public static Object getField(Field field,Object target) {
if(!Modifier.isPublic(field.getModifiers())) {
field.setAccessible(true);
}
try {
return field.get(target);
}
catch(IllegalAccessException iae) {
throw new IllegalArgumentException("Could not get field " + field,iae);
}
}
public static Field findField(Object target,List<String> possible_names) {
if(target == null)
return null;
for(Class<?> clazz=target.getClass(); clazz != null; clazz=clazz.getSuperclass()) {
for(String name : possible_names) {
try {
return clazz.getDeclaredField(name);
}
catch(Exception e) {
}
}
}
return null;
}
public static Method findMethod(Object target,List<String> possible_names,Class<?>... parameter_types) {
if(target == null)
return null;
return findMethod(target.getClass(),possible_names,parameter_types);
}
public static Method findMethod(Class<?> root_class,List<String> possible_names,Class<?>... parameter_types) {
for(Class<?> clazz=root_class; clazz != null; clazz=clazz.getSuperclass()) {
for(String name : possible_names) {
try {
return clazz.getDeclaredMethod(name,parameter_types);
}
catch(Exception e) {
}
}
}
return null;
}
public static <T> Set<Class<T>> findClassesAssignableFrom(String packageName,Class<T> assignableFrom)
throws IOException, ClassNotFoundException {
ClassLoader loader=Thread.currentThread().getContextClassLoader();
Set<Class<T>> classes=new HashSet<Class<T>>();
String path=packageName.replace('.','/');
URL resource=loader.getResource(path);
if(resource != null) {
String filePath=resource.getFile();
if(filePath != null && new File(filePath).isDirectory()) {
for(String file : new File(filePath).list()) {
if(file.endsWith(".class")) {
String name=packageName + '.' + file.substring(0,file.indexOf(".class"));
Class<T> clazz=(Class<T>)Class.forName(name);
if(assignableFrom.isAssignableFrom(clazz))
classes.add(clazz);
}
}
}
}
return classes;
}
public static List<Class<?>> findClassesAnnotatedWith(String packageName,Class<? extends Annotation> a) throws IOException, ClassNotFoundException {
List<Class<?>> classes=new ArrayList<Class<?>>();
recurse(classes,packageName,a);
return classes;
}
private static void recurse(List<Class<?>> classes,String packageName,Class<? extends Annotation> a) throws ClassNotFoundException {
ClassLoader loader=Thread.currentThread().getContextClassLoader();
String path=packageName.replace('.','/');
URL resource=loader.getResource(path);
if(resource != null) {
String filePath=resource.getFile();
if(filePath != null && new File(filePath).isDirectory()) {
for(String file : new File(filePath).list()) {
if(file.endsWith(".class")) {
String name=packageName + '.' + file.substring(0,file.indexOf(".class"));
Class<?> clazz=Class.forName(name);
if(clazz.isAnnotationPresent(a))
classes.add(clazz);
}
else if(new File(filePath,file).isDirectory()) {
recurse(classes,packageName + "." + file,a);
}
}
}
}
}
public static InputStream getResourceAsStream(String name,Class clazz) {
ClassLoader loader;
InputStream retval=null;
// https://issues.jboss.org/browse/JGRP-1762: load the classloader from the defining class first
if(clazz != null) {
try {
loader=clazz.getClassLoader();
if(loader != null) {
retval=loader.getResourceAsStream(name);
if(retval != null)
return retval;
}
}
catch(Throwable t) {
}
}
try {
loader=Thread.currentThread().getContextClassLoader();
if(loader != null) {
retval=loader.getResourceAsStream(name);
if(retval != null)
return retval;
}
}
catch(Throwable t) {
}
try {
loader=ClassLoader.getSystemClassLoader();
if(loader != null) {
return loader.getResourceAsStream(name);
}
}
catch(Throwable t) {
}
return retval;
}
/** Checks whether 2 Addresses are on the same host */
public static boolean sameHost(Address one,Address two) {
InetAddress a, b;
String host_a, host_b;
if(one == null || two == null) return false;
if(!(one instanceof IpAddress) || !(two instanceof IpAddress)) {
return false;
}
a=((IpAddress)one).getIpAddress();
b=((IpAddress)two).getIpAddress();
if(a == null || b == null) return false;
host_a=a.getHostAddress();
host_b=b.getHostAddress();
// System.out.println("host_a=" + host_a + ", host_b=" + host_b);
return host_a.equals(host_b);
}
public static RejectedExecutionHandler parseRejectionPolicy(String rejection_policy) {
if(rejection_policy == null)
throw new IllegalArgumentException("rejection policy is null");
if(rejection_policy.equalsIgnoreCase("abort"))
return new ThreadPoolExecutor.AbortPolicy();
if(rejection_policy.equalsIgnoreCase("discard"))
return new ThreadPoolExecutor.DiscardPolicy();
if(rejection_policy.equalsIgnoreCase("discardoldest"))
return new ThreadPoolExecutor.DiscardOldestPolicy();
if(rejection_policy.equalsIgnoreCase("run"))
return new ThreadPoolExecutor.CallerRunsPolicy();
if(rejection_policy.toLowerCase().startsWith(CustomRejectionPolicy.NAME))
return new CustomRejectionPolicy(rejection_policy);
if(rejection_policy.toLowerCase().startsWith(ProgressCheckRejectionPolicy.NAME))
return new ProgressCheckRejectionPolicy(rejection_policy);
throw new IllegalArgumentException("rejection policy \"" + rejection_policy + "\" not known");
}
/**
* Parses comma-delimited longs; e.g., 2000,4000,8000.
* Returns array of long, or null.
*/
public static int[] parseCommaDelimitedInts(String s) {
StringTokenizer tok;
List<Integer> v=new ArrayList<Integer>();
Integer l;
int[] retval=null;
if(s == null) return null;
tok=new StringTokenizer(s,",");
while(tok.hasMoreTokens()) {
l=new Integer(tok.nextToken());
v.add(l);
}
if(v.isEmpty()) return null;
retval=new int[v.size()];
for(int i=0; i < v.size(); i++)
retval[i]=v.get(i);
return retval;
}
/**
* Parses comma-delimited longs; e.g., 2000,4000,8000.
* Returns array of long, or null.
*/
public static long[] parseCommaDelimitedLongs(String s) {
StringTokenizer tok;
List<Long> v=new ArrayList<Long>();
Long l;
long[] retval=null;
if(s == null) return null;
tok=new StringTokenizer(s,",");
while(tok.hasMoreTokens()) {
l=new Long(tok.nextToken());
v.add(l);
}
if(v.isEmpty()) return null;
retval=new long[v.size()];
for(int i=0; i < v.size(); i++)
retval[i]=v.get(i);
return retval;
}
/** e.g. "bela,jeannette,michelle" --> List{"bela", "jeannette", "michelle"} */
public static List<String> parseCommaDelimitedStrings(String l) {
return parseStringList(l,",");
}
/**
* Input is "daddy[8880],sindhu[8880],camille[5555]. Returns a list of IpAddresses
*/
public static List<PhysicalAddress> parseCommaDelimitedHosts(String hosts,int port_range) throws UnknownHostException {
StringTokenizer tok=new StringTokenizer(hosts,",");
String t;
IpAddress addr;
Set<PhysicalAddress> retval=new HashSet<PhysicalAddress>();
while(tok.hasMoreTokens()) {
t=tok.nextToken().trim();
String host=t.substring(0,t.indexOf('['));
host=host.trim();
int port=Integer.parseInt(t.substring(t.indexOf('[') + 1,t.indexOf(']')));
for(int i=port; i <= port + port_range; i++) {
addr=new IpAddress(host,i);
retval.add(addr);
}
}
return new LinkedList<PhysicalAddress>(retval);
}
/**
* Input is "daddy[8880],sindhu[8880],camille[5555]. Return List of
* InetSocketAddress
*/
public static List<InetSocketAddress> parseCommaDelimitedHosts2(String hosts,int port_range) {
StringTokenizer tok=new StringTokenizer(hosts,",");
String t;
InetSocketAddress addr;
Set<InetSocketAddress> retval=new HashSet<InetSocketAddress>();
while(tok.hasMoreTokens()) {
t=tok.nextToken().trim();
String host=t.substring(0,t.indexOf('['));
host=host.trim();
int port=Integer.parseInt(t.substring(t.indexOf('[') + 1,t.indexOf(']')));
for(int i=port; i < port + port_range; i++) {
addr=new InetSocketAddress(host,i);
retval.add(addr);
}
}
return new LinkedList<InetSocketAddress>(retval);
}
public static List<String> parseStringList(String l,String separator) {
List<String> tmp=new LinkedList<String>();
StringTokenizer tok=new StringTokenizer(l,separator);
String t;
while(tok.hasMoreTokens()) {
t=tok.nextToken();
tmp.add(t.trim());
}
return tmp;
}
public static Map<String,String> parseCommaDelimitedProps(String s) {
if (s == null)
return null;
Map<String,String> props=new HashMap<String,String>();
Pattern p=Pattern.compile("\\s*([^=\\s]+)\\s*=\\s*([^=\\s,]+)\\s*,?"); //Pattern.compile("\\s*([^=\\s]+)\\s*=\\s([^=\\s]+)\\s*,?");
Matcher matcher=p.matcher(s);
while(matcher.find()) {
props.put(matcher.group(1),matcher.group(2));
}
return props;
}
/**
* Reads and discards all characters from the input stream until a \r\n or EOF is encountered
* @param in
* @return
*/
public static int discardUntilNewLine(InputStream in) {
int ch;
int num=0;
while(true) {
try {
ch=in.read();
if(ch == -1)
break;
num++;
if(ch == '\n')
break;
}
catch(IOException e) {
break;
}
}
return num;
}
/**
* Reads a line of text. A line is considered to be terminated by any one
* of a line feed ('\n'), a carriage return ('\r'), or a carriage return
* followed immediately by a linefeed.
* @return A String containing the contents of the line, not including
* any line-termination characters, or null if the end of the
* stream has been reached
* @throws IOException If an I/O error occurs
*/
public static String readLine(InputStream in) throws IOException {
StringBuilder sb=new StringBuilder(35);
int ch;
while(true) {
ch=in.read();
if(ch == -1)
return null;
if(ch == '\r')
;
else {
if(ch == '\n')
break;
else {
sb.append((char)ch);
}
}
}
return sb.toString();
}
/**
* @param s
* @return List<NetworkInterface>
*/
public static List<NetworkInterface> parseInterfaceList(String s) throws Exception {
List<NetworkInterface> interfaces=new ArrayList<NetworkInterface>(10);
if(s == null)
return null;
StringTokenizer tok=new StringTokenizer(s,",");
String interface_name;
NetworkInterface intf;
while(tok.hasMoreTokens()) {
interface_name=tok.nextToken();
// try by name first (e.g. (eth0")
intf=NetworkInterface.getByName(interface_name);
// next try by IP address or symbolic name
if(intf == null)
intf=NetworkInterface.getByInetAddress(InetAddress.getByName(interface_name));
if(intf == null)
throw new Exception("interface " + interface_name + " not found");
if(!interfaces.contains(intf)) {
interfaces.add(intf);
}
}
return interfaces;
}
public static String print(List<NetworkInterface> interfaces) {
StringBuilder sb=new StringBuilder();
boolean first=true;
for(NetworkInterface intf : interfaces) {
if(first) {
first=false;
}
else {
sb.append(", ");
}
sb.append(intf.getName());
}
return sb.toString();
}
public static String shortName(String hostname) {
if(hostname == null) return null;
int index=hostname.indexOf('.');
if(index > 0 && !Character.isDigit(hostname.charAt(0)))
return hostname.substring(0,index);
else
return hostname;
}
/**
* Performs the flush of the given channel for the specified flush participants and the given
* number of attempts along with random sleep time after each such attempt.
* @param c the channel
* @param flushParticipants the flush participants in this flush attempt
* @param numberOfAttempts the number of flush attempts
* @param randomSleepTimeoutFloor the minimum sleep time between attempts in ms
* @param randomSleepTimeoutCeiling the maximum sleep time between attempts in ms
* @return true if channel was flushed successfully, false otherwise
* @see Channel#startFlush(List,boolean)
*/
public static boolean startFlush(Channel c,List<Address> flushParticipants,
int numberOfAttempts,long randomSleepTimeoutFloor,long randomSleepTimeoutCeiling) {
int attemptCount=0;
while(attemptCount < numberOfAttempts) {
try {
c.startFlush(flushParticipants,false);
return true;
}
catch(Exception e) {
Util.sleepRandom(randomSleepTimeoutFloor,randomSleepTimeoutCeiling);
attemptCount++;
}
}
return false;
}
/**
* Performs the flush of the given channel and the specified flush participants
* @param c the channel
* @param flushParticipants the flush participants in this flush attempt
* @see Channel#startFlush(List,boolean)
*/
public static boolean startFlush(Channel c,List<Address> flushParticipants) {
return startFlush(c,flushParticipants,4,1000,5000);
}
/**
* Performs the flush of the given channel within the specfied number of attempts along with random
* sleep time after each such attempt.
* @param c the channel
* @param numberOfAttempts the number of flush attempts
* @param randomSleepTimeoutFloor the minimum sleep time between attempts in ms
* @param randomSleepTimeoutCeiling the maximum sleep time between attempts in ms
* @return true if channel was flushed successfully, false otherwise
* @see Channel#startFlush(boolean)
*/
public static boolean startFlush(Channel c,int numberOfAttempts,long randomSleepTimeoutFloor,long randomSleepTimeoutCeiling) {
int attemptCount=0;
while(attemptCount < numberOfAttempts) {
try {
c.startFlush(false);
return true;
}
catch(Exception e) {
Util.sleepRandom(randomSleepTimeoutFloor,randomSleepTimeoutCeiling);
attemptCount++;
}
}
return false;
}
/**
* Performs the flush of the given channel
* @param c the channel
* @return true if channel was flushed successfully, false otherwise
* @see Channel#startFlush(boolean)
*/
public static boolean startFlush(Channel c) {
return startFlush(c,4,1000,5000);
}
public static String shortName(InetAddress hostname) {
if(hostname == null) return null;
StringBuilder sb=new StringBuilder();
if(resolve_dns)
sb.append(hostname.getHostName());
else
sb.append(hostname.getHostAddress());
return sb.toString();
}
public static String generateLocalName() {
String retval=null;
try {
retval=shortName(InetAddress.getLocalHost().getHostName());
}
catch(Throwable e) {
}
if(retval == null) {
try {
retval=shortName(InetAddress.getByName(null).getHostName());
}
catch(Throwable e) {
retval="localhost";
}
}
long counter=Util.random(Short.MAX_VALUE * 2);
return retval + "-" + counter;
}
public static <K,V> ConcurrentMap<K,V> createConcurrentMap(int initial_capacity,float load_factor,int concurrency_level) {
return new ConcurrentHashMap<K,V>(initial_capacity,load_factor,concurrency_level);
}
public static <K,V> ConcurrentMap<K,V> createConcurrentMap(int initial_capacity) {
return new ConcurrentHashMap<K,V>(initial_capacity);
}
public static <K,V> ConcurrentMap<K,V> createConcurrentMap() {
return new ConcurrentHashMap<K,V>(CCHM_INITIAL_CAPACITY,CCHM_LOAD_FACTOR,CCHM_CONCURRENCY_LEVEL);
}
public static ServerSocket createServerSocket(SocketFactory factory, String service_name, InetAddress bind_addr, int start_port) {
ServerSocket ret=null;
while(true) {
try {
ret=factory.createServerSocket(service_name,start_port,50,bind_addr);
}
catch(BindException bind_ex) {
start_port++;
continue;
}
catch(IOException io_ex) {
}
break;
}
return ret;
}
/**
* Finds first available port starting at start_port and returns server
* socket. Will not bind to port >end_port. Sets srv_port
*/
public static ServerSocket createServerSocket(SocketFactory factory,String service_name,InetAddress bind_addr,
int start_port,int end_port) throws Exception {
ServerSocket ret=null;
int original_start_port=start_port;
while(true) {
try {
if(bind_addr == null)
ret=factory.createServerSocket(service_name,start_port);
else {
// changed (bela Sept 7 2007): we accept connections on all NICs
ret=factory.createServerSocket(service_name,start_port,50,bind_addr);
}
}
catch(SocketException bind_ex) {
if(start_port == end_port)
throw new BindException("No available port to bind to in range [" + original_start_port + " .. " + end_port + "]");
if(bind_addr != null && !bind_addr.isLoopbackAddress()) {
NetworkInterface nic=NetworkInterface.getByInetAddress(bind_addr);
if(nic == null)
throw new BindException("bind_addr " + bind_addr + " is not a valid interface: " + bind_ex);
}
start_port++;
continue;
}
break;
}
return ret;
}
/**
* Creates a DatagramSocket bound to addr. If addr is null, socket won't be bound. If address is already in use,
* start_port will be incremented until a socket can be created.
* @param addr The InetAddress to which the socket should be bound. If null, the socket will not be bound.
* @param port The port which the socket should use. If 0, a random port will be used. If > 0, but port is already
* in use, it will be incremented until an unused port is found, or until MAX_PORT is reached.
*/
public static DatagramSocket createDatagramSocket(SocketFactory factory,String service_name,InetAddress addr,int port) throws Exception {
DatagramSocket sock=null;
if(addr == null) {
if(port == 0) {
return factory.createDatagramSocket(service_name);
}
else {
while(port < MAX_PORT) {
try {
return factory.createDatagramSocket(service_name,port);
}
catch(BindException bind_ex) { // port already used
port++;
}
}
}
}
else {
if(port == 0) port=1024;
while(port < MAX_PORT) {
try {
return factory.createDatagramSocket(service_name,port,addr);
}
catch(BindException bind_ex) { // port already used
port++;
}
}
}
return sock; // will never be reached, but the stupid compiler didn't figure it out...
}
public static MulticastSocket createMulticastSocket(SocketFactory factory,String service_name,InetAddress mcast_addr,int port,Log log) throws IOException {
if(mcast_addr != null && !mcast_addr.isMulticastAddress())
throw new IllegalArgumentException("mcast_addr (" + mcast_addr + ") is not a valid multicast address");
SocketAddress saddr=new InetSocketAddress(mcast_addr,port);
MulticastSocket retval=null;
try {
retval=factory.createMulticastSocket(service_name,saddr);
}
catch(IOException ex) {
if(log != null && log.isWarnEnabled()) {
StringBuilder sb=new StringBuilder();
String type=mcast_addr != null? mcast_addr instanceof Inet4Address? "IPv4" : "IPv6" : "n/a";
sb.append("could not bind to " + mcast_addr + " (" + type + " address)");
sb.append("; make sure your mcast_addr is of the same type as the preferred IP stack (IPv4 or IPv6)");
sb.append(" by checking the value of the system properties java.net.preferIPv4Stack and java.net.preferIPv6Addresses.");
sb.append("\nWill ignore mcast_addr, but this may lead to cross talking " +
"(see http://www.jboss.org/community/docs/DOC-9469 for details). ");
sb.append("\nException was: " + ex);
log.warn(sb.toString());
}
}
if(retval == null)
retval=factory.createMulticastSocket(service_name,port);
return retval;
}
/**
* Method used by PropertyConverters.BindInterface to check that a bind_address is
* consistent with a specified interface
* <p/>
* Idea:
* 1. We are passed a bind_addr, which may be null
* 2. If non-null, check that bind_addr is on bind_interface - if not, throw exception,
* otherwise, return the original bind_addr
* 3. If null, get first non-loopback address on bind_interface, using stack preference to
* get the IP version. If no non-loopback address, then just return null (i.e. the
* bind_interface did not influence the decision).
*/
public static InetAddress validateBindAddressFromInterface(InetAddress bind_addr,String bind_interface_str) throws UnknownHostException, SocketException {
NetworkInterface bind_intf=null;
if(bind_addr != null && bind_addr.isLoopbackAddress())
return bind_addr;
// 1. if bind_interface_str is null, or empty, no constraint on bind_addr
if(bind_interface_str == null || bind_interface_str.trim().isEmpty())
return bind_addr;
// 2. get the preferred IP version for the JVM - it will be IPv4 or IPv6
StackType ip_version=getIpStackType();
// 3. if bind_interface_str specified, get interface and check that it has correct version
bind_intf=Util.getByName(bind_interface_str); // NetworkInterface.getByName(bind_interface_str);
if(bind_intf != null) {
// check that the interface supports the IP version
boolean supportsVersion=interfaceHasIPAddresses(bind_intf,ip_version);
if(!supportsVersion)
throw new IllegalArgumentException("bind_interface " + bind_interface_str + " has incorrect IP version");
}
else {
// (bind_intf == null)
throw new UnknownHostException("network interface " + bind_interface_str + " not found");
}
// 3. intf and bind_addr are both are specified, bind_addr needs to be on intf
if(bind_addr != null) {
boolean hasAddress=false;
// get all the InetAddresses defined on the interface
Enumeration addresses=bind_intf.getInetAddresses();
while(addresses != null && addresses.hasMoreElements()) {
// get the next InetAddress for the current interface
InetAddress address=(InetAddress)addresses.nextElement();
// check if address is on interface
if(bind_addr.equals(address)) {
hasAddress=true;
break;
}
}
if(!hasAddress) {
String bind_addr_str=bind_addr.getHostAddress();
throw new IllegalArgumentException("network interface " + bind_interface_str + " does not contain address " + bind_addr_str);
}
}
// 4. if only interface is specified, get first non-loopback address on that interface,
else {
bind_addr=getAddress(bind_intf,AddressScope.NON_LOOPBACK);
}
//http://jira.jboss.org/jira/browse/JGRP-739
//check all bind_address against NetworkInterface.getByInetAddress() to see if it exists on the machine
//in some Linux setups NetworkInterface.getByInetAddress(InetAddress.getLocalHost()) returns null, so skip
//the check in that case
if(bind_addr != null && NetworkInterface.getByInetAddress(bind_addr) == null) {
throw new UnknownHostException("Invalid bind address " + bind_addr);
}
// if bind_addr == null, we have tried to obtain a bind_addr but were not successful
// in such a case, return the original value of null so the default will be applied
return bind_addr;
}
/** Finds a network interface of sub-interface with the given name */
public static NetworkInterface getByName(String name) throws SocketException {
if(name == null) return null;
Enumeration<NetworkInterface> en=NetworkInterface.getNetworkInterfaces();
while(en.hasMoreElements()) {
NetworkInterface intf=en.nextElement();
if(intf.getName().equals(name))
return intf;
Enumeration<NetworkInterface> en2=intf.getSubInterfaces();
while(en2.hasMoreElements()) {
NetworkInterface intf2=en2.nextElement();
if(intf2.getName().equals(name)) {
return intf2;
}
}
}
return null;
}
public static boolean checkForLinux() {
return checkForPresence("os.name","linux");
}
public static boolean checkForHp() {
return checkForPresence("os.name","hp");
}
public static boolean checkForSolaris() {
return checkForPresence("os.name","sun");
}
public static boolean checkForWindows() {
return checkForPresence("os.name","win");
}
public static boolean checkForAndroid() {
return contains("java.vm.vendor","android");
}
public static boolean checkForMac() {return checkForPresence("os.name", "mac");}
private static boolean checkForPresence(String key,String value) {
try {
String tmp=System.getProperty(key);
return tmp != null && tmp.trim().toLowerCase().startsWith(value);
}
catch(Throwable t) {
return false;
}
}
private static boolean contains(String key,String value) {
try {
String tmp=System.getProperty(key);
return tmp != null && tmp.trim().toLowerCase().contains(value.trim().toLowerCase());
}
catch(Throwable t) {
return false;
}
}
/** IP related utilities */
public static InetAddress getLocalhost(StackType ip_version) throws UnknownHostException {
if(ip_version == StackType.IPv4)
return InetAddress.getByName("127.0.0.1");
else
return InetAddress.getByName("::1");
}
/**
* Returns the first non-loopback address on any interface on the current host.
*/
public static InetAddress getNonLoopbackAddress() throws SocketException {
return getAddress(AddressScope.NON_LOOPBACK);
}
/**
* Returns the first address on any interface of the current host, which satisfies scope
*/
public static InetAddress getAddress(AddressScope scope) throws SocketException {
InetAddress address=null;
Enumeration intfs=NetworkInterface.getNetworkInterfaces();
while(intfs.hasMoreElements()) {
NetworkInterface intf=(NetworkInterface)intfs.nextElement();
try {
if(intf.isUp()) {
address=getAddress(intf,scope);
if(address != null)
return address;
}
}
catch(SocketException e) {
}
}
return null;
}
/**
* Returns a valid interface address based on a pattern. Iterates over all interfaces that are up and
* returns the first match, based on the address or interface name
* @param pattern Can be "match-addr:<pattern></pattern>" or "match-interface:<pattern></pattern>". Example:<p/>
* match-addr:192.168.*
* @return InetAddress or null if not found
*/
public static InetAddress getAddressByPatternMatch(String pattern) throws Exception {
if(pattern == null) return null;
String real_pattern=null;
byte type=0; // 1=match-interface, 2: match-addr, 3: match-host,
if(pattern.startsWith(Global.MATCH_INTF)) {
type=1;
real_pattern=pattern.substring(Global.MATCH_INTF.length() + 1);
}
else if(pattern.startsWith(Global.MATCH_ADDR)) {
type=2;
real_pattern=pattern.substring(Global.MATCH_ADDR.length() + 1);
}
else if(pattern.startsWith(Global.MATCH_HOST)) {
type=3;
real_pattern=pattern.substring(Global.MATCH_HOST.length() + 1);
}
if(real_pattern == null)
throw new IllegalArgumentException("expected " + Global.MATCH_ADDR + ":<pattern>, " +
Global.MATCH_HOST + ":<pattern> or " + Global.MATCH_INTF + ":<pattern>");
Pattern pat=Pattern.compile(real_pattern);
Enumeration intfs=NetworkInterface.getNetworkInterfaces();
while(intfs.hasMoreElements()) {
NetworkInterface intf=(NetworkInterface)intfs.nextElement();
try {
if(!intf.isUp())
continue;
switch(type) {
case 1: // match by interface name
String interface_name=intf.getName();
Matcher matcher=pat.matcher(interface_name);
if(matcher.matches())
return getAddress(intf,null);
break;
case 2: // match by host address
case 3: // match by host name
for(Enumeration<InetAddress> en=intf.getInetAddresses(); en.hasMoreElements(); ) {
InetAddress addr=en.nextElement();
String name=type == 3? addr.getHostName() : addr.getHostAddress();
matcher=pat.matcher(name);
if(matcher.matches())
return addr;
}
break;
}
}
catch(SocketException e) {
}
}
return null;
}
/**
* Returns the first address on the given interface on the current host, which satisfies scope
* @param intf the interface to be checked
*/
public static InetAddress getAddress(NetworkInterface intf,AddressScope scope) {
StackType ip_version=Util.getIpStackType();
for(Enumeration addresses=intf.getInetAddresses(); addresses.hasMoreElements(); ) {
InetAddress addr=(InetAddress)addresses.nextElement();
boolean match=scope == null;
if(scope != null) {
switch(scope) {
case GLOBAL:
match=!addr.isLoopbackAddress() && !addr.isLinkLocalAddress() && !addr.isSiteLocalAddress();
break;
case SITE_LOCAL:
match=addr.isSiteLocalAddress();
break;
case LINK_LOCAL:
match=addr.isLinkLocalAddress();
break;
case LOOPBACK:
match=addr.isLoopbackAddress();
break;
case NON_LOOPBACK:
match=!addr.isLoopbackAddress();
break;
default:
throw new IllegalArgumentException("scope " + scope + " is unknown");
}
}
if(match) {
if((addr instanceof Inet4Address && ip_version == StackType.IPv4) ||
(addr instanceof Inet6Address && ip_version == StackType.IPv6))
return addr;
}
}
return null;
}
/**
* A function to check if an interface supports an IP version (i.e has addresses
* defined for that IP version).
* @param intf
* @return
*/
public static boolean interfaceHasIPAddresses(NetworkInterface intf,StackType ip_version) throws UnknownHostException {
boolean supportsVersion=false;
if(intf != null) {
// get all the InetAddresses defined on the interface
Enumeration addresses=intf.getInetAddresses();
while(addresses != null && addresses.hasMoreElements()) {
// get the next InetAddress for the current interface
InetAddress address=(InetAddress)addresses.nextElement();
// check if we find an address of correct version
if((address instanceof Inet4Address && (ip_version == StackType.IPv4)) ||
(address instanceof Inet6Address && (ip_version == StackType.IPv6))) {
supportsVersion=true;
break;
}
}
}
else {
throw new UnknownHostException("network interface " + intf + " not found");
}
return supportsVersion;
}
public static StackType getIpStackType() {
return ip_stack_type;
}
/** Returns true if the 2 addresses are of the same type (IPv4 or IPv6) */
public static boolean sameAddresses(InetAddress one,InetAddress two) {
return one == null
|| two == null
|| (one instanceof Inet6Address && two instanceof Inet6Address)
|| (one instanceof Inet4Address && two instanceof Inet4Address);
}
/**
* Tries to determine the type of IP stack from the available interfaces and their addresses and from the
* system properties (java.net.preferIPv4Stack and java.net.preferIPv6Addresses)
* @return StackType.IPv4 for an IPv4 only stack, StackYTypeIPv6 for an IPv6 only stack, and StackType.Unknown
* if the type cannot be detected
*/
private static StackType _getIpStackType() {
boolean isIPv4StackAvailable=isStackAvailable(true);
boolean isIPv6StackAvailable=isStackAvailable(false);
// if only IPv4 stack available
if(isIPv4StackAvailable && !isIPv6StackAvailable) {
return StackType.IPv4;
}
// if only IPv6 stack available
else if(isIPv6StackAvailable && !isIPv4StackAvailable) {
return StackType.IPv6;
}
// if dual stack
else if(isIPv4StackAvailable && isIPv6StackAvailable) {
// get the System property which records user preference for a stack on a dual stack machine
if(Boolean.getBoolean(Global.IPv4)) // has preference over java.net.preferIPv6Addresses
return StackType.IPv4;
return StackType.IPv6;
}
return StackType.Unknown;
}
public static boolean isStackAvailable(boolean ipv4) {
Collection<InetAddress> all_addrs=getAllAvailableAddresses();
for(InetAddress addr : all_addrs)
if(ipv4 && addr instanceof Inet4Address || (!ipv4 && addr instanceof Inet6Address))
return true;
return false;
}
public static List<NetworkInterface> getAllAvailableInterfaces() throws SocketException {
List<NetworkInterface> retval=new ArrayList<NetworkInterface>(10);
NetworkInterface intf;
for(Enumeration en=NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {
intf=(NetworkInterface)en.nextElement();
retval.add(intf);
}
return retval;
}
public static Collection<InetAddress> getAllAvailableAddresses() {
Set<InetAddress> retval=new HashSet<InetAddress>();
Enumeration en;
try {
en=NetworkInterface.getNetworkInterfaces();
if(en == null)
return retval;
while(en.hasMoreElements()) {
NetworkInterface intf=(NetworkInterface)en.nextElement();
Enumeration<InetAddress> addrs=intf.getInetAddresses();
while(addrs.hasMoreElements())
retval.add(addrs.nextElement());
}
}
catch(SocketException e) {
e.printStackTrace();
}
return retval;
}
public static void checkIfValidAddress(InetAddress bind_addr,String prot_name) throws Exception {
if(bind_addr.isAnyLocalAddress() || bind_addr.isLoopbackAddress())
return;
Collection<InetAddress> addrs=getAllAvailableAddresses();
for(InetAddress addr : addrs) {
if(addr.equals(bind_addr))
return;
}
throw new BindException("[" + prot_name + "] " + bind_addr + " is not a valid address on any local network interface");
}
/**
* Returns a value associated wither with one or more system properties, or found in the props map
* @param system_props
* @param props List of properties read from the configuration file
* @param prop_name The name of the property, will be removed from props if found
* @param default_value Used to return a default value if the properties or system properties didn't have the value
* @return The value, or null if not found
*/
public static String getProperty(String[] system_props,Properties props,String prop_name,String default_value) {
String retval=null;
if(props != null && prop_name != null) {
retval=props.getProperty(prop_name);
props.remove(prop_name);
}
String tmp, prop;
if(retval == null && system_props != null) {
for(int i=0; i < system_props.length; i++) {
prop=system_props[i];
if(prop != null) {
try {
tmp=System.getProperty(prop);
if(tmp != null)
return tmp;
}
catch(SecurityException ex) {
}
}
}
}
if(retval == null)
return default_value;
return retval;
}
public static boolean isCoordinator(JChannel ch) {
return isCoordinator(ch.getView(),ch.getAddress());
}
public static boolean isCoordinator(View view,Address local_addr) {
if(view == null || local_addr == null)
return false;
List<Address> mbrs=view.getMembers();
return !(mbrs == null || mbrs.isEmpty()) && local_addr.equals(mbrs.iterator().next());
}
public static Address getCoordinator(View view) {
if(view == null)
return null;
List<Address> mbrs=view.getMembers();
return !mbrs.isEmpty()? mbrs.get(0) : null;
}
public static MBeanServer getMBeanServer() {
List<MBeanServer> servers=MBeanServerFactory.findMBeanServer(null);
if(servers != null && !servers.isEmpty()) {
// return 'jboss' server if available
for(int i=0; i < servers.size(); i++) {
MBeanServer srv=servers.get(i);
if("jboss".equalsIgnoreCase(srv.getDefaultDomain()))
return srv;
}
// return first available server
return servers.get(0);
}
else {
//if it all fails, create a default
return MBeanServerFactory.createMBeanServer();
}
}
public static void registerChannel(JChannel channel,String name) {
MBeanServer server=Util.getMBeanServer();
if(server != null) {
try {
JmxConfigurator.registerChannel(channel,
server,
(name != null? name : "jgroups"),
channel.getClusterName(),
true);
}
catch(Exception e) {
e.printStackTrace();
}
}
}
/**
* Go through the input string and replace any occurance of ${p} with the
* props.getProperty(p) value. If there is no such property p defined, then
* the ${p} reference will remain unchanged.
* <p/>
* If the property reference is of the form ${p:v} and there is no such
* property p, then the default value v will be returned.
* <p/>
* If the property reference is of the form ${p1,p2} or ${p1,p2:v} then the
* primary and the secondary properties will be tried in turn, before
* returning either the unchanged input, or the default value.
* <p/>
* The property ${/} is replaced with System.getProperty("file.separator")
* value and the property ${:} is replaced with
* System.getProperty("path.separator").
* @param string -
* the string with possible ${} references
* @param props -
* the source for ${x} property ref values, null means use
* System.getProperty()
* @return the input string with all property references replaced if any. If
* there are no valid references the input string will be returned.
* @throws {@link java.security.AccessControlException}
* when not authorised to retrieved system properties
*/
public static String replaceProperties(final String string,final Properties props) {
/** File separator value */
final String FILE_SEPARATOR=File.separator;
/** Path separator value */
final String PATH_SEPARATOR=File.pathSeparator;
/** File separator alias */
final String FILE_SEPARATOR_ALIAS="/";
/** Path separator alias */
final String PATH_SEPARATOR_ALIAS=":";
// States used in property parsing
final int NORMAL=0;
final int SEEN_DOLLAR=1;
final int IN_BRACKET=2;
final char[] chars=string.toCharArray();
StringBuilder buffer=new StringBuilder();
boolean properties=false;
int state=NORMAL;
int start=0;
for(int i=0; i < chars.length; ++i) {
char c=chars[i];
// Dollar sign outside brackets
if(c == '$' && state != IN_BRACKET)
state=SEEN_DOLLAR;
// Open bracket immediatley after dollar
else if(c == '{' && state == SEEN_DOLLAR) {
buffer.append(string.substring(start,i - 1));
state=IN_BRACKET;
start=i - 1;
}
// No open bracket after dollar
else if(state == SEEN_DOLLAR)
state=NORMAL;
// Closed bracket after open bracket
else if(c == '}' && state == IN_BRACKET) {
// No content
if(start + 2 == i) {
buffer.append("${}"); // REVIEW: Correct?
}
else // Collect the system property
{
String value=null;
String key=string.substring(start + 2,i);
// check for alias
if(FILE_SEPARATOR_ALIAS.equals(key)) {
value=FILE_SEPARATOR;
}
else if(PATH_SEPARATOR_ALIAS.equals(key)) {
value=PATH_SEPARATOR;
}
else {
// check from the properties
if(props != null)
value=props.getProperty(key);
else
value=System.getProperty(key);
if(value == null) {
// Check for a default value ${key:default}
int colon=key.indexOf(':');
if(colon > 0) {
String realKey=key.substring(0,colon);
if(props != null)
value=props.getProperty(realKey);
else
value=System.getProperty(realKey);
if(value == null) {
// Check for a composite key, "key1,key2"
value=resolveCompositeKey(realKey,props);
// Not a composite key either, use the specified default
if(value == null)
value=key.substring(colon + 1);
}
}
else {
// No default, check for a composite key, "key1,key2"
value=resolveCompositeKey(key,props);
}
}
}
if(value != null) {
properties=true;
buffer.append(value);
}
}
start=i + 1;
state=NORMAL;
}
}
// No properties
if(!properties)
return string;
// Collect the trailing characters
if(start != chars.length)
buffer.append(string.substring(start,chars.length));
// Done
return buffer.toString();
}
/**
* Try to resolve a "key" from the provided properties by checking if it is
* actually a "key1,key2", in which case try first "key1", then "key2". If
* all fails, return null.
* <p/>
* It also accepts "key1," and ",key2".
* @param key the key to resolve
* @param props the properties to use
* @return the resolved key or null
*/
private static String resolveCompositeKey(String key,Properties props) {
String value=null;
// Look for the comma
int comma=key.indexOf(',');
if(comma > -1) {
// If we have a first part, try resolve it
if(comma > 0) {
// Check the first part
String key1=key.substring(0,comma);
if(props != null)
value=props.getProperty(key1);
else
value=System.getProperty(key1);
}
// Check the second part, if there is one and first lookup failed
if(value == null && comma < key.length() - 1) {
String key2=key.substring(comma + 1);
if(props != null)
value=props.getProperty(key2);
else
value=System.getProperty(key2);
}
}
// Return whatever we've found or null
return value;
}
// /**
// * Replaces variables with values from system properties. If a system property is not found, the property is
// * removed from the output string
// * @param input
// * @return
// */
// public static String substituteVariables(String input) throws Exception {
// Collection<Configurator.ProtocolConfiguration> configs=Configurator.parseConfigurations(input);
// for(Configurator.ProtocolConfiguration config: configs) {
// for(Iterator<Map.Entry<String,String>> it=config.getProperties().entrySet().iterator(); it.hasNext();) {
// Map.Entry<String,String> entry=it.next();
//
//
// }
// }
//
//
// return null;
// }
/**
* Replaces variables of ${var:default} with System.getProperty(var, default). If no variables are found, returns
* the same string, otherwise a copy of the string with variables substituted
* @param val
* @return A string with vars replaced, or the same string if no vars found
*/
public static String substituteVariable(String val) {
if(val == null)
return val;
String retval=val, prev;
while(retval.contains("${")) { // handle multiple variables in val
prev=retval;
retval=_substituteVar(retval);
if(retval.equals(prev))
break;
}
return retval;
}
private static String _substituteVar(String val) {
int start_index, end_index;
start_index=val.indexOf("${");
if(start_index == -1)
return val;
end_index=val.indexOf("}",start_index + 2);
if(end_index == -1)
throw new IllegalArgumentException("missing \"}\" in " + val);
String tmp=getProperty(val.substring(start_index + 2,end_index));
if(tmp == null)
return val;
StringBuilder sb=new StringBuilder();
sb.append(val.substring(0,start_index));
sb.append(tmp);
sb.append(val.substring(end_index + 1));
return sb.toString();
}
public static String getProperty(String s) {
String var, default_val, retval=null;
int index=s.indexOf(":");
if(index >= 0) {
var=s.substring(0,index);
default_val=s.substring(index + 1);
if(default_val != null && !default_val.isEmpty())
default_val=default_val.trim();
// retval=System.getProperty(var, default_val);
retval=_getProperty(var,default_val);
}
else {
var=s;
// retval=System.getProperty(var);
retval=_getProperty(var,null);
}
return retval;
}
/**
* Parses a var which might be comma delimited, e.g. bla,foo:1000: if 'bla' is set, return its value. Else,
* if 'foo' is set, return its value, else return "1000"
* @param var
* @param default_value
* @return
*/
private static String _getProperty(String var,String default_value) {
if(var == null)
return null;
List<String> list=parseCommaDelimitedStrings(var);
if(list == null || list.isEmpty()) {
list=new ArrayList<String>(1);
list.add(var);
}
String retval=null;
for(String prop : list) {
try {
retval=System.getProperty(prop);
if(retval != null)
return retval;
}
catch(Throwable e) {
}
}
return default_value;
}
/**
* Used to convert a byte array in to a java.lang.String object
* @param bytes the bytes to be converted
* @return the String representation
*/
private static String getString(byte[] bytes) {
StringBuilder sb=new StringBuilder();
for(int i=0; i < bytes.length; i++) {
byte b=bytes[i];
sb.append(0x00FF & b);
if(i + 1 < bytes.length) {
sb.append("-");
}
}
return sb.toString();
}
/**
* Converts a java.lang.String in to a MD5 hashed String
* @param source the source String
* @return the MD5 hashed version of the string
*/
public static String md5(String source) {
try {
MessageDigest md=MessageDigest.getInstance("MD5");
byte[] bytes=md.digest(source.getBytes());
return getString(bytes);
}
catch(Exception e) {
return null;
}
}
/**
* Converts a java.lang.String in to a SHA hashed String
* @param source the source String
* @return the MD5 hashed version of the string
*/
public static String sha(String source) {
try {
MessageDigest md=MessageDigest.getInstance("SHA");
byte[] bytes=md.digest(source.getBytes());
return getString(bytes);
}
catch(Exception e) {
e.printStackTrace();
return null;
}
}
/**
* Converts a method name to an attribute name, e.g. getFooBar() --> foo_bar, isFlag --> flag.
* @param methodName
* @return
*/
public static String methodNameToAttributeName(final String methodName) {
String name=methodName;
if((methodName.startsWith("get") || methodName.startsWith("set")) && methodName.length() > 3)
name=methodName.substring(3);
else if(methodName.startsWith("is") && methodName.length() > 2)
name=methodName.substring(2);
// Pattern p=Pattern.compile("[A-Z]+");
Matcher m=METHOD_NAME_TO_ATTR_NAME_PATTERN.matcher(name);
StringBuffer sb=new StringBuffer();
while(m.find()) {
int start=m.start(), end=m.end();
String str=name.substring(start,end).toLowerCase();
if(str.length() > 1) {
String tmp1=str.substring(0,str.length() - 1);
String tmp2=str.substring(str.length() - 1);
str=tmp1 + "_" + tmp2;
}
if(start == 0) {
m.appendReplacement(sb,str);
}
else
m.appendReplacement(sb,"_" + str);
}
m.appendTail(sb);
return sb.length() > 0? sb.toString() : methodName;
}
/**
* Converts a method name to a Java attribute name, e.g. getFooBar() --> fooBar, isFlag --> flag.
* @param methodName
* @return
*/
public static String methodNameToJavaAttributeName(final String methodName) {
String name=methodName;
if((methodName.startsWith("get") || methodName.startsWith("set")) && methodName.length() > 3)
name=methodName.substring(3);
else if(methodName.startsWith("is") && methodName.length() > 2)
name=methodName.substring(2);
if(Character.isUpperCase(name.charAt(0)))
return name.substring(0,1).toLowerCase() + name.substring(1);
return name;
}
public static String attributeNameToMethodName(String attr_name) {
if(attr_name.contains("_")) {
// Pattern p=Pattern.compile("_.");
Matcher m=ATTR_NAME_TO_METHOD_NAME_PATTERN.matcher(attr_name);
StringBuffer sb=new StringBuffer();
while(m.find()) {
m.appendReplacement(sb,attr_name.substring(m.end() - 1,m.end()).toUpperCase());
}
m.appendTail(sb);
char first=sb.charAt(0);
if(Character.isLowerCase(first)) {
sb.setCharAt(0,Character.toUpperCase(first));
}
return sb.toString();
}
else {
if(Character.isLowerCase(attr_name.charAt(0))) {
return attr_name.substring(0,1).toUpperCase() + attr_name.substring(1);
}
else {
return attr_name;
}
}
}
}