/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.remoting.ident;
import org.jboss.remoting.network.NetworkRegistry;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.net.InetAddress;
import java.rmi.dgc.VMID;
import java.util.Iterator;
import java.util.Map;
import java.util.Random;
import java.util.WeakHashMap;
/**
* Identity is used to uniquely identify a JBoss server instance on the network.
*
* @author <a href="mailto:jhaynie@vocalocity.net">Jeff Haynie</a>
* @version $Revision: 1104 $
*/
public class Identity implements Serializable
{
static final long serialVersionUID = -2788084303665751253L;
private static transient Random random = new Random(System.currentTimeMillis());
public static transient String DEFAULT_DOMAIN = "JBOSS";
private static transient String _domain = System.getProperty("jboss.identity.domain", DEFAULT_DOMAIN);
private static transient Map identities = new WeakHashMap(2);
private final String instanceid;
private final InetAddress ip;
private final String serverid;
private String domain;
private int hashCode;
private Identity(InetAddress addr, String instanceid, String serverid)
{
this.ip = addr;
this.instanceid = instanceid;
this.serverid = serverid;
this.domain = ((_domain == null || _domain.equals("")) ? DEFAULT_DOMAIN : _domain);
calcHashCode();
}
private void calcHashCode()
{
this.hashCode = (ip.hashCode() + instanceid.hashCode() + serverid.hashCode() - domain.hashCode());
}
/**
* set the domain for all active mbean servers
*/
public static void setDomain(String domain)
{
Iterator iter = identities.keySet().iterator();
while(iter.hasNext())
{
Identity ident = (Identity) identities.get(iter.next());
if(ident != null)
{
ident.domain = domain;
}
ident.calcHashCode();
}
System.setProperty("jboss.identity.domain", domain);
_domain = domain;
NetworkRegistry.getInstance().changeDomain(domain);
}
public int hashCode()
{
return hashCode;
}
public String toString()
{
return "JBOSS Identity\n\taddress:" + ip + "\n\tinstanceid:" + instanceid + "\n\tJMX id:" + serverid + "\n\tdomain:" + domain + "\n";
}
/**
* return the domain for the server
*
* @return
*/
public final String getDomain()
{
return domain;
}
/**
* return the JBOSS Instance ID, which is the same between reboots of the same
* JBOSS server instance.
*
* @return
*/
public String getInstanceId()
{
return this.instanceid;
}
/**
* return the JBOSS IP Address of the instance
*
* @return
*/
public InetAddress getAddress()
{
return this.ip;
}
/**
* return the JMX server ID for the JBoss instance, which is different between
* reboots of the same JBOSS server instance.
*
* @return
*/
public String getJMXId()
{
return this.serverid;
}
/**
* returns true if the identity represents the same JVM
*
* @param identity
* @return
*/
public boolean isSameJVM(Identity identity)
{
return identity.equals(this);
}
/**
* returns true if the identity represents the same JBOSS Instance, although
* may not be the exact same process space since the JVM process space might be
* different (such as a reboot).
*
* @param identity
* @return
*/
public boolean isSameInstance(Identity identity)
{
return identity.getInstanceId().equals(instanceid);
}
/**
* returns true if the identity is on the same JBOSS machine, represented by the
* same IP address (this may not work in the case several physically different
* machines have the same IP Address).
*
* @param identity
* @return
*/
public boolean isSameMachine(Identity identity)
{
return identity.getAddress().equals(ip);
}
public boolean equals(Object obj)
{
if(obj instanceof Identity)
{
return hashCode == obj.hashCode();
}
return false;
}
public static synchronized final Identity get(MBeanServer server)
{
if(identities.containsKey(server))
{
return (Identity) identities.get(server);
}
try
{
String serverid = (String) server.getAttribute(new ObjectName("JMImplementation:type=MBeanServerDelegate"), "MBeanServerId");
Identity identity = new Identity(InetAddress.getLocalHost(), createId(server), serverid);
identities.put(server, identity);
return identity;
}
catch(Exception ex)
{
throw new RuntimeException("Exception creating identity: " + ex.getMessage());
}
}
private static final synchronized String createId(MBeanServer server)
{
// we can set as a system property
String myid = System.getProperty("jboss.identity");
if(myid != null)
{
return myid;
}
String id = null;
File file = null;
try
{
// FIRST TRY THE JBOSS guy to determine our data directory
ObjectName obj = new ObjectName("jboss.system:type=ServerConfig");
File dir = (File) server.getAttribute(obj, "ServerDataDir");
if(dir != null)
{
if(dir.exists() == false)
{
dir.mkdirs();
}
file = new File(dir, "jboss.identity");
}
}
catch(Exception ex)
{
}
if(file == null)
{
// we may not have that mbean, which is OK
String fl = System.getProperty("jboss.identity.dir", ".");
File dir = new File(fl);
if(dir.exists() == false)
{
dir.mkdirs();
}
file = new File(dir, "jboss.identity");
}
if(file.exists() && file.canRead())
{
InputStream is = null;
try
{
is = new FileInputStream(file);
byte buf[] = new byte[800];
int c = is.read(buf);
id = new String(buf, 0, c);
}
catch(Exception ex)
{
throw new RuntimeException("Error loading jboss.identity: " + ex.toString());
}
finally
{
if(is != null)
{
try
{
is.close();
}
catch(Exception ig)
{
}
}
}
}
else
{
OutputStream out = null;
try
{
id = createUniqueID();
if(file.exists() == false)
{
file.createNewFile();
}
out = new FileOutputStream(file);
out.write(id.getBytes());
}
catch(Exception ex)
{
throw new RuntimeException("Error creating Instance ID: " + ex.toString());
}
finally
{
if(out != null)
{
try
{
out.flush();
out.close();
}
catch(Exception ig)
{
}
}
}
}
System.setProperty("jboss.identity", id);
return id;
}
public static final String createUniqueID()
{
String id = new VMID().toString();
// colons don't work in JMX
return id.replace(':', 'x') + random.nextInt(1000);
}
}