/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.store.kahadb;
import java.io.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.EOFException;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.*;
import java.util.Map.Entry;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.apache.activemq.ActiveMQMessageAuditNoSync;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.BrokerServiceAware;
import org.apache.activemq.command.ConnectionId;
import org.apache.activemq.command.LocalTransactionId;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.command.SubscriptionInfo;
import org.apache.activemq.command.TransactionId;
import org.apache.activemq.command.XATransactionId;
import org.apache.activemq.protobuf.Buffer;
import org.apache.activemq.store.kahadb.data.KahaAddMessageCommand;
import org.apache.activemq.store.kahadb.data.KahaCommitCommand;
import org.apache.activemq.store.kahadb.data.KahaDestination;
import org.apache.activemq.store.kahadb.data.KahaEntryType;
import org.apache.activemq.store.kahadb.data.KahaLocalTransactionId;
import org.apache.activemq.store.kahadb.data.KahaPrepareCommand;
import org.apache.activemq.store.kahadb.data.KahaProducerAuditCommand;
import org.apache.activemq.store.kahadb.data.KahaRemoveDestinationCommand;
import org.apache.activemq.store.kahadb.data.KahaRemoveMessageCommand;
import org.apache.activemq.store.kahadb.data.KahaRollbackCommand;
import org.apache.activemq.store.kahadb.data.KahaSubscriptionCommand;
import org.apache.activemq.store.kahadb.data.KahaTraceCommand;
import org.apache.activemq.store.kahadb.data.KahaTransactionInfo;
import org.apache.activemq.store.kahadb.data.KahaXATransactionId;
import org.apache.activemq.util.Callback;
import org.apache.activemq.util.IOHelper;
import org.apache.activemq.util.ServiceStopper;
import org.apache.activemq.util.ServiceSupport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.kahadb.index.BTreeIndex;
import org.apache.kahadb.index.BTreeVisitor;
import org.apache.kahadb.journal.DataFile;
import org.apache.kahadb.journal.Journal;
import org.apache.kahadb.journal.Location;
import org.apache.kahadb.page.Page;
import org.apache.kahadb.page.PageFile;
import org.apache.kahadb.page.Transaction;
import org.apache.kahadb.util.ByteSequence;
import org.apache.kahadb.util.DataByteArrayInputStream;
import org.apache.kahadb.util.DataByteArrayOutputStream;
import org.apache.kahadb.util.LockFile;
import org.apache.kahadb.util.LongMarshaller;
import org.apache.kahadb.util.Marshaller;
import org.apache.kahadb.util.Sequence;
import org.apache.kahadb.util.SequenceSet;
import org.apache.kahadb.util.StringMarshaller;
import org.apache.kahadb.util.VariableMarshaller;
public class MessageDatabase extends ServiceSupport implements BrokerServiceAware {
protected BrokerService brokerService;
public static final String PROPERTY_LOG_SLOW_ACCESS_TIME = "org.apache.activemq.store.kahadb.LOG_SLOW_ACCESS_TIME";
public static final int LOG_SLOW_ACCESS_TIME = Integer.parseInt(System.getProperty(PROPERTY_LOG_SLOW_ACCESS_TIME, "500"));
private static final Log LOG = LogFactory.getLog(MessageDatabase.class);
private static final int DEFAULT_DATABASE_LOCKED_WAIT_DELAY = 10 * 1000;
static final int CLOSED_STATE = 1;
static final int OPEN_STATE = 2;
static final long NOT_ACKED = -1;
static final int VERSION = 2;
protected class Metadata {
protected Page<Metadata> page;
protected int state;
protected BTreeIndex<String, StoredDestination> destinations;
protected Location lastUpdate;
protected Location firstInProgressTransactionLocation;
protected Location producerSequenceIdTrackerLocation = null;
protected transient ActiveMQMessageAuditNoSync producerSequenceIdTracker = new ActiveMQMessageAuditNoSync();
protected int version = VERSION;
public void read(DataInput is) throws IOException {
state = is.readInt();
destinations = new BTreeIndex<String, StoredDestination>(pageFile, is.readLong());
if (is.readBoolean()) {
lastUpdate = LocationMarshaller.INSTANCE.readPayload(is);
} else {
lastUpdate = null;
}
if (is.readBoolean()) {
firstInProgressTransactionLocation = LocationMarshaller.INSTANCE.readPayload(is);
} else {
firstInProgressTransactionLocation = null;
}
try {
if (is.readBoolean()) {
producerSequenceIdTrackerLocation = LocationMarshaller.INSTANCE.readPayload(is);
} else {
producerSequenceIdTrackerLocation = null;
}
} catch (EOFException expectedOnUpgrade) {
}
try {
version = is.readInt();
}catch (EOFException expectedOnUpgrade) {
version=1;
}
LOG.info("KahaDB is version " + version);
}
public void write(DataOutput os) throws IOException {
os.writeInt(state);
os.writeLong(destinations.getPageId());
if (lastUpdate != null) {
os.writeBoolean(true);
LocationMarshaller.INSTANCE.writePayload(lastUpdate, os);
} else {
os.writeBoolean(false);
}
if (firstInProgressTransactionLocation != null) {
os.writeBoolean(true);
LocationMarshaller.INSTANCE.writePayload(firstInProgressTransactionLocation, os);
} else {
os.writeBoolean(false);
}
if (producerSequenceIdTrackerLocation != null) {
os.writeBoolean(true);
LocationMarshaller.INSTANCE.writePayload(producerSequenceIdTrackerLocation, os);
} else {
os.writeBoolean(false);
}
if (version > 1) {
os.writeInt(version);
}
}
}
class MetadataMarshaller extends VariableMarshaller<Metadata> {
public Metadata readPayload(DataInput dataIn) throws IOException {
Metadata rc = new Metadata();
rc.read(dataIn);
return rc;
}
public void writePayload(Metadata object, DataOutput dataOut) throws IOException {
object.write(dataOut);
}
}
protected PageFile pageFile;
protected Journal journal;
protected Metadata metadata = new Metadata();
protected MetadataMarshaller metadataMarshaller = new MetadataMarshaller();
protected boolean failIfDatabaseIsLocked;
protected boolean deleteAllMessages;
protected File directory = new File("KahaDB");
protected Thread checkpointThread;
protected boolean enableJournalDiskSyncs=true;
protected boolean archiveDataLogs;
protected File directoryArchive;
protected AtomicLong storeSize = new AtomicLong(0);
long checkpointInterval = 5*1000;
long cleanupInterval = 30*1000;
int journalMaxFileLength = Journal.DEFAULT_MAX_FILE_LENGTH;
int journalMaxWriteBatchSize = Journal.DEFAULT_MAX_WRITE_BATCH_SIZE;
boolean enableIndexWriteAsync = false;
int setIndexWriteBatchSize = PageFile.DEFAULT_WRITE_BATCH_SIZE;
protected AtomicBoolean opened = new AtomicBoolean();
private LockFile lockFile;
private boolean ignoreMissingJournalfiles = false;
private int indexCacheSize = 10000;
private boolean checkForCorruptJournalFiles = false;
private boolean checksumJournalFiles = false;
private int databaseLockedWaitDelay = DEFAULT_DATABASE_LOCKED_WAIT_DELAY;
protected boolean forceRecoverIndex = false;
public MessageDatabase() {
}
@Override
public void doStart() throws Exception {
load();
}
@Override
public void doStop(ServiceStopper stopper) throws Exception {
unload();
}
private void loadPageFile() throws IOException {
this.indexLock.writeLock().lock();
try {
final PageFile pageFile = getPageFile();
pageFile.load();
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
if (pageFile.getPageCount() == 0) {
// First time this is created.. Initialize the metadata
Page<Metadata> page = tx.allocate();
assert page.getPageId() == 0;
page.set(metadata);
metadata.page = page;
metadata.state = CLOSED_STATE;
metadata.destinations = new BTreeIndex<String, StoredDestination>(pageFile, tx.allocate().getPageId());
tx.store(metadata.page, metadataMarshaller, true);
} else {
Page<Metadata> page = tx.load(0, metadataMarshaller);
metadata = page.get();
metadata.page = page;
}
metadata.destinations.setKeyMarshaller(StringMarshaller.INSTANCE);
metadata.destinations.setValueMarshaller(new StoredDestinationMarshaller());
metadata.destinations.load(tx);
}
});
pageFile.flush();
// Load up all the destinations since we need to scan all the indexes to figure out which journal files can be deleted.
// Perhaps we should just keep an index of file
storedDestinations.clear();
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
for (Iterator<Entry<String, StoredDestination>> iterator = metadata.destinations.iterator(tx); iterator.hasNext();) {
Entry<String, StoredDestination> entry = iterator.next();
StoredDestination sd = loadStoredDestination(tx, entry.getKey(), entry.getValue().subscriptions!=null);
storedDestinations.put(entry.getKey(), sd);
}
}
});
}finally {
this.indexLock.writeLock().unlock();
}
}
private void startCheckpoint() {
checkpointThread = new Thread("ActiveMQ Journal Checkpoint Worker") {
@Override
public void run() {
try {
long lastCleanup = System.currentTimeMillis();
long lastCheckpoint = System.currentTimeMillis();
// Sleep for a short time so we can periodically check
// to see if we need to exit this thread.
long sleepTime = Math.min(checkpointInterval, 500);
while (opened.get()) {
Thread.sleep(sleepTime);
long now = System.currentTimeMillis();
if( now - lastCleanup >= cleanupInterval ) {
checkpointCleanup(true);
lastCleanup = now;
lastCheckpoint = now;
} else if( now - lastCheckpoint >= checkpointInterval ) {
checkpointCleanup(false);
lastCheckpoint = now;
}
}
} catch (InterruptedException e) {
// Looks like someone really wants us to exit this thread...
} catch (IOException ioe) {
LOG.error("Checkpoint failed", ioe);
brokerService.handleIOException(ioe);
}
}
};
checkpointThread.setDaemon(true);
checkpointThread.start();
}
public void open() throws IOException {
if( opened.compareAndSet(false, true) ) {
getJournal().start();
loadPageFile();
startCheckpoint();
recover();
}
}
private void lock() throws IOException {
if( lockFile == null ) {
File lockFileName = new File(directory, "lock");
lockFile = new LockFile(lockFileName, true);
if (failIfDatabaseIsLocked) {
lockFile.lock();
} else {
while (true) {
try {
lockFile.lock();
break;
} catch (IOException e) {
LOG.info("Database "+lockFileName+" is locked... waiting " + (getDatabaseLockedWaitDelay() / 1000) + " seconds for the database to be unlocked. Reason: " + e);
try {
Thread.sleep(getDatabaseLockedWaitDelay());
} catch (InterruptedException e1) {
}
}
}
}
}
}
public void load() throws IOException {
this.indexLock.writeLock().lock();
try {
lock();
if (deleteAllMessages) {
getJournal().start();
getJournal().delete();
getJournal().close();
journal = null;
getPageFile().delete();
LOG.info("Persistence store purged.");
deleteAllMessages = false;
}
open();
store(new KahaTraceCommand().setMessage("LOADED " + new Date()));
}finally {
this.indexLock.writeLock().unlock();
}
}
public void close() throws IOException, InterruptedException {
if( opened.compareAndSet(true, false)) {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
checkpointUpdate(tx, true);
}
});
pageFile.unload();
metadata = new Metadata();
}finally {
this.indexLock.writeLock().unlock();
}
journal.close();
checkpointThread.join();
lockFile.unlock();
lockFile=null;
}
}
public void unload() throws IOException, InterruptedException {
this.indexLock.writeLock().lock();
try {
if( pageFile != null && pageFile.isLoaded() ) {
metadata.state = CLOSED_STATE;
metadata.firstInProgressTransactionLocation = getFirstInProgressTxLocation();
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
tx.store(metadata.page, metadataMarshaller, true);
}
});
}
}finally {
this.indexLock.writeLock().unlock();
}
close();
}
/**
* @return
*/
private Location getFirstInProgressTxLocation() {
Location l = null;
synchronized (inflightTransactions) {
if (!inflightTransactions.isEmpty()) {
l = inflightTransactions.values().iterator().next().get(0).getLocation();
}
if (!preparedTransactions.isEmpty()) {
Location t = preparedTransactions.values().iterator().next().get(0).getLocation();
if (l==null || t.compareTo(l) <= 0) {
l = t;
}
}
}
return l;
}
/**
* Move all the messages that were in the journal into long term storage. We
* just replay and do a checkpoint.
*
* @throws IOException
* @throws IOException
* @throws IllegalStateException
*/
private void recover() throws IllegalStateException, IOException {
this.indexLock.writeLock().lock();
try {
long start = System.currentTimeMillis();
Location producerAuditPosition = recoverProducerAudit();
Location lastIndoubtPosition = getRecoveryPosition();
Location recoveryPosition = minimum(producerAuditPosition, lastIndoubtPosition);
if (recoveryPosition != null) {
int redoCounter = 0;
LOG.info("Recovering from the journal ...");
while (recoveryPosition != null) {
JournalCommand<?> message = load(recoveryPosition);
metadata.lastUpdate = recoveryPosition;
process(message, recoveryPosition, lastIndoubtPosition);
redoCounter++;
recoveryPosition = journal.getNextLocation(recoveryPosition);
}
long end = System.currentTimeMillis();
LOG.info("Recovery replayed " + redoCounter + " operations from the journal in " + ((end - start) / 1000.0f) + " seconds.");
}
// We may have to undo some index updates.
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
recoverIndex(tx);
}
});
}finally {
this.indexLock.writeLock().unlock();
}
}
private Location minimum(Location producerAuditPosition,
Location lastIndoubtPosition) {
Location min = null;
if (producerAuditPosition != null) {
min = producerAuditPosition;
if (lastIndoubtPosition != null && lastIndoubtPosition.compareTo(producerAuditPosition) < 0) {
min = lastIndoubtPosition;
}
} else {
min = lastIndoubtPosition;
}
return min;
}
private Location recoverProducerAudit() throws IOException {
if (metadata.producerSequenceIdTrackerLocation != null) {
KahaProducerAuditCommand audit = (KahaProducerAuditCommand) load(metadata.producerSequenceIdTrackerLocation);
try {
ObjectInputStream objectIn = new ObjectInputStream(audit.getAudit().newInput());
metadata.producerSequenceIdTracker = (ActiveMQMessageAuditNoSync) objectIn.readObject();
} catch (ClassNotFoundException cfe) {
IOException ioe = new IOException("Failed to read producerAudit: " + cfe);
ioe.initCause(cfe);
throw ioe;
}
return journal.getNextLocation(metadata.producerSequenceIdTrackerLocation);
} else {
// got no audit stored so got to recreate via replay from start of the journal
return journal.getNextLocation(null);
}
}
protected void recoverIndex(Transaction tx) throws IOException {
long start = System.currentTimeMillis();
// It is possible index updates got applied before the journal updates..
// in that case we need to removed references to messages that are not in the journal
final Location lastAppendLocation = journal.getLastAppendLocation();
long undoCounter=0;
// Go through all the destinations to see if they have messages past the lastAppendLocation
for (StoredDestination sd : storedDestinations.values()) {
final ArrayList<Long> matches = new ArrayList<Long>();
// Find all the Locations that are >= than the last Append Location.
sd.locationIndex.visit(tx, new BTreeVisitor.GTEVisitor<Location, Long>(lastAppendLocation) {
@Override
protected void matched(Location key, Long value) {
matches.add(value);
}
});
for (Long sequenceId : matches) {
MessageKeys keys = sd.orderIndex.remove(tx, sequenceId);
sd.locationIndex.remove(tx, keys.location);
sd.messageIdIndex.remove(tx, keys.messageId);
metadata.producerSequenceIdTracker.rollback(new MessageId(keys.messageId));
undoCounter++;
// TODO: do we need to modify the ack positions for the pub sub case?
}
}
long end = System.currentTimeMillis();
if( undoCounter > 0 ) {
// The rolledback operations are basically in flight journal writes. To avoid getting these the end user
// should do sync writes to the journal.
LOG.info("Rolled back " + undoCounter + " messages from the index in " + ((end - start) / 1000.0f) + " seconds.");
}
undoCounter = 0;
start = System.currentTimeMillis();
// Lets be extra paranoid here and verify that all the datafiles being referenced
// by the indexes still exists.
final SequenceSet ss = new SequenceSet();
for (StoredDestination sd : storedDestinations.values()) {
// Use a visitor to cut down the number of pages that we load
sd.locationIndex.visit(tx, new BTreeVisitor<Location, Long>() {
int last=-1;
public boolean isInterestedInKeysBetween(Location first, Location second) {
if( first==null ) {
return !ss.contains(0, second.getDataFileId());
} else if( second==null ) {
return true;
} else {
return !ss.contains(first.getDataFileId(), second.getDataFileId());
}
}
public void visit(List<Location> keys, List<Long> values) {
for (Location l : keys) {
int fileId = l.getDataFileId();
if( last != fileId ) {
ss.add(fileId);
last = fileId;
}
}
}
});
}
HashSet<Integer> missingJournalFiles = new HashSet<Integer>();
while( !ss.isEmpty() ) {
missingJournalFiles.add( (int)ss.removeFirst() );
}
missingJournalFiles.removeAll( journal.getFileMap().keySet() );
if( !missingJournalFiles.isEmpty() ) {
LOG.info("Some journal files are missing: "+missingJournalFiles);
}
ArrayList<BTreeVisitor.Predicate<Location>> missingPredicates = new ArrayList<BTreeVisitor.Predicate<Location>>();
for (Integer missing : missingJournalFiles) {
missingPredicates.add(new BTreeVisitor.BetweenVisitor<Location, Long>(new Location(missing,0), new Location(missing+1,0)));
}
if ( checkForCorruptJournalFiles ) {
Collection<DataFile> dataFiles = journal.getFileMap().values();
for (DataFile dataFile : dataFiles) {
int id = dataFile.getDataFileId();
missingPredicates.add(new BTreeVisitor.BetweenVisitor<Location, Long>(new Location(id,dataFile.getLength()), new Location(id+1,0)));
Sequence seq = dataFile.getCorruptedBlocks().getHead();
while( seq!=null ) {
missingPredicates.add(new BTreeVisitor.BetweenVisitor<Location, Long>(new Location(id, (int) seq.getFirst()), new Location(id, (int) seq.getLast()+1)));
seq = seq.getNext();
}
}
}
if( !missingPredicates.isEmpty() ) {
for (StoredDestination sd : storedDestinations.values()) {
final ArrayList<Long> matches = new ArrayList<Long>();
sd.locationIndex.visit(tx, new BTreeVisitor.OrVisitor<Location, Long>(missingPredicates) {
@Override
protected void matched(Location key, Long value) {
matches.add(value);
}
});
// If somes message references are affected by the missing data files...
if( !matches.isEmpty() ) {
// We either 'gracefully' recover dropping the missing messages or
// we error out.
if( ignoreMissingJournalfiles ) {
// Update the index to remove the references to the missing data
for (Long sequenceId : matches) {
MessageKeys keys = sd.orderIndex.remove(tx, sequenceId);
sd.locationIndex.remove(tx, keys.location);
sd.messageIdIndex.remove(tx, keys.messageId);
undoCounter++;
// TODO: do we need to modify the ack positions for the pub sub case?
}
} else {
throw new IOException("Detected missing/corrupt journal files. "+matches.size()+" messages affected.");
}
}
}
}
end = System.currentTimeMillis();
if( undoCounter > 0 ) {
// The rolledback operations are basically in flight journal writes. To avoid getting these the end user
// should do sync writes to the journal.
LOG.info("Detected missing/corrupt journal files. Dropped " + undoCounter + " messages from the index in " + ((end - start) / 1000.0f) + " seconds.");
}
}
private Location nextRecoveryPosition;
private Location lastRecoveryPosition;
public void incrementalRecover() throws IOException {
this.indexLock.writeLock().lock();
try {
if( nextRecoveryPosition == null ) {
if( lastRecoveryPosition==null ) {
nextRecoveryPosition = getRecoveryPosition();
} else {
nextRecoveryPosition = journal.getNextLocation(lastRecoveryPosition);
}
}
while (nextRecoveryPosition != null) {
lastRecoveryPosition = nextRecoveryPosition;
metadata.lastUpdate = lastRecoveryPosition;
JournalCommand<?> message = load(lastRecoveryPosition);
process(message, lastRecoveryPosition);
nextRecoveryPosition = journal.getNextLocation(lastRecoveryPosition);
}
}finally {
this.indexLock.writeLock().unlock();
}
}
public Location getLastUpdatePosition() throws IOException {
return metadata.lastUpdate;
}
private Location getRecoveryPosition() throws IOException {
if (!this.forceRecoverIndex) {
// If we need to recover the transactions..
if (metadata.firstInProgressTransactionLocation != null) {
return metadata.firstInProgressTransactionLocation;
}
// Perhaps there were no transactions...
if( metadata.lastUpdate!=null) {
// Start replay at the record after the last one recorded in the index file.
return journal.getNextLocation(metadata.lastUpdate);
}
}
// This loads the first position.
return journal.getNextLocation(null);
}
protected void checkpointCleanup(final boolean cleanup) throws IOException {
long start;
this.indexLock.writeLock().lock();
try {
start = System.currentTimeMillis();
if( !opened.get() ) {
return;
}
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
checkpointUpdate(tx, cleanup);
}
});
}finally {
this.indexLock.writeLock().unlock();
}
long end = System.currentTimeMillis();
if( LOG_SLOW_ACCESS_TIME>0 && end-start > LOG_SLOW_ACCESS_TIME) {
LOG.info("Slow KahaDB access: cleanup took "+(end-start));
}
}
public void checkpoint(Callback closure) throws Exception {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
checkpointUpdate(tx, false);
}
});
closure.execute();
}finally {
this.indexLock.writeLock().unlock();
}
}
// /////////////////////////////////////////////////////////////////
// Methods call by the broker to update and query the store.
// /////////////////////////////////////////////////////////////////
public Location store(JournalCommand<?> data) throws IOException {
return store(data, false, null,null);
}
/**
* All updated are are funneled through this method. The updates are converted
* to a JournalMessage which is logged to the journal and then the data from
* the JournalMessage is used to update the index just like it would be done
* during a recovery process.
*/
public Location store(JournalCommand<?> data, boolean sync, Runnable before,Runnable after) throws IOException {
if (before != null) {
before.run();
}
try {
int size = data.serializedSizeFramed();
DataByteArrayOutputStream os = new DataByteArrayOutputStream(size + 1);
os.writeByte(data.type().getNumber());
data.writeFramed(os);
long start = System.currentTimeMillis();
Location location = journal.write(os.toByteSequence(), sync);
long start2 = System.currentTimeMillis();
process(data, location);
long end = System.currentTimeMillis();
if( LOG_SLOW_ACCESS_TIME>0 && end-start > LOG_SLOW_ACCESS_TIME) {
LOG.info("Slow KahaDB access: Journal append took: "+(start2-start)+" ms, Index update took "+(end-start2)+" ms");
}
this.indexLock.writeLock().lock();
try {
metadata.lastUpdate = location;
}finally {
this.indexLock.writeLock().unlock();
}
if (!checkpointThread.isAlive()) {
LOG.info("KahaDB: Recovering checkpoint thread after exception");
startCheckpoint();
}
if (after != null) {
after.run();
}
return location;
} catch (IOException ioe) {
LOG.error("KahaDB failed to store to Journal", ioe);
brokerService.handleIOException(ioe);
throw ioe;
}
}
/**
* Loads a previously stored JournalMessage
*
* @param location
* @return
* @throws IOException
*/
public JournalCommand<?> load(Location location) throws IOException {
ByteSequence data = journal.read(location);
DataByteArrayInputStream is = new DataByteArrayInputStream(data);
byte readByte = is.readByte();
KahaEntryType type = KahaEntryType.valueOf(readByte);
if( type == null ) {
throw new IOException("Could not load journal record. Invalid location: "+location);
}
JournalCommand<?> message = (JournalCommand<?>)type.createMessage();
message.mergeFramed(is);
return message;
}
/**
* do minimal recovery till we reach the last inDoubtLocation
* @param data
* @param location
* @param inDoubtlocation
* @throws IOException
*/
void process(JournalCommand<?> data, final Location location, final Location inDoubtlocation) throws IOException {
if (inDoubtlocation != null && location.compareTo(inDoubtlocation) >= 0) {
process(data, location);
} else {
// just recover producer audit
data.visit(new Visitor() {
public void visit(KahaAddMessageCommand command) throws IOException {
metadata.producerSequenceIdTracker.isDuplicate(command.getMessageId());
}
});
}
}
// /////////////////////////////////////////////////////////////////
// Journaled record processing methods. Once the record is journaled,
// these methods handle applying the index updates. These may be called
// from the recovery method too so they need to be idempotent
// /////////////////////////////////////////////////////////////////
void process(JournalCommand<?> data, final Location location) throws IOException {
data.visit(new Visitor() {
@Override
public void visit(KahaAddMessageCommand command) throws IOException {
process(command, location);
}
@Override
public void visit(KahaRemoveMessageCommand command) throws IOException {
process(command, location);
}
@Override
public void visit(KahaPrepareCommand command) throws IOException {
process(command, location);
}
@Override
public void visit(KahaCommitCommand command) throws IOException {
process(command, location);
}
@Override
public void visit(KahaRollbackCommand command) throws IOException {
process(command, location);
}
@Override
public void visit(KahaRemoveDestinationCommand command) throws IOException {
process(command, location);
}
@Override
public void visit(KahaSubscriptionCommand command) throws IOException {
process(command, location);
}
});
}
protected void process(final KahaAddMessageCommand command, final Location location) throws IOException {
if (command.hasTransactionInfo()) {
List<Operation> inflightTx = getInflightTx(command.getTransactionInfo(), location);
inflightTx.add(new AddOpperation(command, location));
} else {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
upadateIndex(tx, command, location);
}
});
}finally {
this.indexLock.writeLock().unlock();
}
}
}
protected void process(final KahaRemoveMessageCommand command, final Location location) throws IOException {
if (command.hasTransactionInfo()) {
List<Operation> inflightTx = getInflightTx(command.getTransactionInfo(), location);
inflightTx.add(new RemoveOpperation(command, location));
} else {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
updateIndex(tx, command, location);
}
});
}finally {
this.indexLock.writeLock().unlock();
}
}
}
protected void process(final KahaRemoveDestinationCommand command, final Location location) throws IOException {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
updateIndex(tx, command, location);
}
});
}finally {
this.indexLock.writeLock().unlock();
}
}
protected void process(final KahaSubscriptionCommand command, final Location location) throws IOException {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
updateIndex(tx, command, location);
}
});
}finally {
this.indexLock.writeLock().unlock();
}
}
protected void process(KahaCommitCommand command, Location location) throws IOException {
TransactionId key = key(command.getTransactionInfo());
List<Operation> inflightTx;
synchronized (inflightTransactions) {
inflightTx = inflightTransactions.remove(key);
if (inflightTx == null) {
inflightTx = preparedTransactions.remove(key);
}
}
if (inflightTx == null) {
return;
}
final List<Operation> messagingTx = inflightTx;
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure<IOException>() {
public void execute(Transaction tx) throws IOException {
for (Operation op : messagingTx) {
op.execute(tx);
}
}
});
}finally {
this.indexLock.writeLock().unlock();
}
}
protected void process(KahaPrepareCommand command, Location location) {
TransactionId key = key(command.getTransactionInfo());
synchronized (inflightTransactions) {
List<Operation> tx = inflightTransactions.remove(key);
if (tx != null) {
preparedTransactions.put(key, tx);
}
}
}
protected void process(KahaRollbackCommand command, Location location) {
TransactionId key = key(command.getTransactionInfo());
synchronized (inflightTransactions) {
List<Operation> tx = inflightTransactions.remove(key);
if (tx == null) {
preparedTransactions.remove(key);
}
}
}
// /////////////////////////////////////////////////////////////////
// These methods do the actual index updates.
// /////////////////////////////////////////////////////////////////
protected final ReentrantReadWriteLock indexLock = new ReentrantReadWriteLock();
private final HashSet<Integer> journalFilesBeingReplicated = new HashSet<Integer>();
void upadateIndex(Transaction tx, KahaAddMessageCommand command, Location location) throws IOException {
StoredDestination sd = getStoredDestination(command.getDestination(), tx);
// Skip adding the message to the index if this is a topic and there are
// no subscriptions.
if (sd.subscriptions != null && sd.ackPositions.isEmpty()) {
return;
}
// Add the message.
int priority = command.getPrioritySupported() ? command.getPriority() : javax.jms.Message.DEFAULT_PRIORITY;
long id = sd.orderIndex.getNextMessageId(priority);
Long previous = sd.locationIndex.put(tx, location, id);
if (previous == null) {
previous = sd.messageIdIndex.put(tx, command.getMessageId(), id);
if (previous == null) {
sd.orderIndex.put(tx, priority, id, new MessageKeys(command.getMessageId(), location));
} else {
// If the message ID as indexed, then the broker asked us to
// store a DUP
// message. Bad BOY! Don't do it, and log a warning.
LOG.warn("Duplicate message add attempt rejected. Destination: " + command.getDestination().getName() + ", Message id: " + command.getMessageId());
// TODO: consider just rolling back the tx.
sd.messageIdIndex.put(tx, command.getMessageId(), previous);
sd.locationIndex.remove(tx, location);
}
} else {
// restore the previous value.. Looks like this was a redo of a
// previously
// added message. We don't want to assign it a new id as the other
// indexes would
// be wrong..
//
// TODO: consider just rolling back the tx.
sd.locationIndex.put(tx, location, previous);
}
// record this id in any event, initial send or recovery
metadata.producerSequenceIdTracker.isDuplicate(command.getMessageId());
}
void updateIndex(Transaction tx, KahaRemoveMessageCommand command, Location ackLocation) throws IOException {
StoredDestination sd = getStoredDestination(command.getDestination(), tx);
if (!command.hasSubscriptionKey()) {
// In the queue case we just remove the message from the index..
Long sequenceId = sd.messageIdIndex.remove(tx, command.getMessageId());
if (sequenceId != null) {
MessageKeys keys = sd.orderIndex.remove(tx, sequenceId);
if (keys != null) {
sd.locationIndex.remove(tx, keys.location);
recordAckMessageReferenceLocation(ackLocation, keys.location);
}
}
} else {
// In the topic case we need remove the message once it's been acked
// by all the subs
Long sequence = sd.messageIdIndex.get(tx, command.getMessageId());
// Make sure it's a valid message id...
if (sequence != null) {
String subscriptionKey = command.getSubscriptionKey();
Long prev = sd.subscriptionAcks.put(tx, subscriptionKey, sequence);
// The following method handles deleting un-referenced messages.
removeAckLocation(tx, sd, subscriptionKey, prev);
// Add it to the new location set.
addAckLocation(sd, sequence, subscriptionKey);
}
}
}
Map<Integer, Set<Integer>> ackMessageFileMap = new HashMap<Integer, Set<Integer>>();
private void recordAckMessageReferenceLocation(Location ackLocation, Location messageLocation) {
Set<Integer> referenceFileIds = ackMessageFileMap.get(Integer.valueOf(ackLocation.getDataFileId()));
if (referenceFileIds == null) {
referenceFileIds = new HashSet<Integer>();
referenceFileIds.add(messageLocation.getDataFileId());
ackMessageFileMap.put(ackLocation.getDataFileId(), referenceFileIds);
} else {
Integer id = Integer.valueOf(messageLocation.getDataFileId());
if (!referenceFileIds.contains(id)) {
referenceFileIds.add(id);
}
}
}
void updateIndex(Transaction tx, KahaRemoveDestinationCommand command, Location location) throws IOException {
StoredDestination sd = getStoredDestination(command.getDestination(), tx);
sd.orderIndex.remove(tx);
sd.locationIndex.clear(tx);
sd.locationIndex.unload(tx);
tx.free(sd.locationIndex.getPageId());
sd.messageIdIndex.clear(tx);
sd.messageIdIndex.unload(tx);
tx.free(sd.messageIdIndex.getPageId());
if (sd.subscriptions != null) {
sd.subscriptions.clear(tx);
sd.subscriptions.unload(tx);
tx.free(sd.subscriptions.getPageId());
sd.subscriptionAcks.clear(tx);
sd.subscriptionAcks.unload(tx);
tx.free(sd.subscriptionAcks.getPageId());
}
String key = key(command.getDestination());
storedDestinations.remove(key);
metadata.destinations.remove(tx, key);
}
void updateIndex(Transaction tx, KahaSubscriptionCommand command, Location location) throws IOException {
StoredDestination sd = getStoredDestination(command.getDestination(), tx);
// If set then we are creating it.. otherwise we are destroying the sub
if (command.hasSubscriptionInfo()) {
String subscriptionKey = command.getSubscriptionKey();
sd.subscriptions.put(tx, subscriptionKey, command);
long ackLocation=NOT_ACKED;
if (!command.getRetroactive()) {
ackLocation = sd.orderIndex.nextMessageId-1;
}
sd.subscriptionAcks.put(tx, subscriptionKey, ackLocation);
addAckLocation(sd, ackLocation, subscriptionKey);
} else {
// delete the sub...
String subscriptionKey = command.getSubscriptionKey();
sd.subscriptions.remove(tx, subscriptionKey);
Long prev = sd.subscriptionAcks.remove(tx, subscriptionKey);
if( prev!=null ) {
removeAckLocation(tx, sd, subscriptionKey, prev);
}
}
}
/**
* @param tx
* @throws IOException
*/
void checkpointUpdate(Transaction tx, boolean cleanup) throws IOException {
LOG.debug("Checkpoint started.");
metadata.state = OPEN_STATE;
metadata.producerSequenceIdTrackerLocation = checkpointProducerAudit();
metadata.firstInProgressTransactionLocation = getFirstInProgressTxLocation();
tx.store(metadata.page, metadataMarshaller, true);
pageFile.flush();
if( cleanup ) {
final TreeSet<Integer> gcCandidateSet = new TreeSet<Integer>(journal.getFileMap().keySet());
// Don't GC files under replication
if( journalFilesBeingReplicated!=null ) {
gcCandidateSet.removeAll(journalFilesBeingReplicated);
}
// Don't GC files after the first in progress tx
Location firstTxLocation = metadata.lastUpdate;
if( metadata.firstInProgressTransactionLocation!=null ) {
firstTxLocation = metadata.firstInProgressTransactionLocation;
}
if( firstTxLocation!=null ) {
while( !gcCandidateSet.isEmpty() ) {
Integer last = gcCandidateSet.last();
if( last >= firstTxLocation.getDataFileId() ) {
gcCandidateSet.remove(last);
} else {
break;
}
}
}
// Go through all the destinations to see if any of them can remove GC candidates.
for (StoredDestination sd : storedDestinations.values()) {
if( gcCandidateSet.isEmpty() ) {
break;
}
// Use a visitor to cut down the number of pages that we load
sd.locationIndex.visit(tx, new BTreeVisitor<Location, Long>() {
int last=-1;
public boolean isInterestedInKeysBetween(Location first, Location second) {
if( first==null ) {
SortedSet<Integer> subset = gcCandidateSet.headSet(second.getDataFileId()+1);
if( !subset.isEmpty() && subset.last() == second.getDataFileId() ) {
subset.remove(second.getDataFileId());
}
return !subset.isEmpty();
} else if( second==null ) {
SortedSet<Integer> subset = gcCandidateSet.tailSet(first.getDataFileId());
if( !subset.isEmpty() && subset.first() == first.getDataFileId() ) {
subset.remove(first.getDataFileId());
}
return !subset.isEmpty();
} else {
SortedSet<Integer> subset = gcCandidateSet.subSet(first.getDataFileId(), second.getDataFileId()+1);
if( !subset.isEmpty() && subset.first() == first.getDataFileId() ) {
subset.remove(first.getDataFileId());
}
if( !subset.isEmpty() && subset.last() == second.getDataFileId() ) {
subset.remove(second.getDataFileId());
}
return !subset.isEmpty();
}
}
public void visit(List<Location> keys, List<Long> values) {
for (Location l : keys) {
int fileId = l.getDataFileId();
if( last != fileId ) {
gcCandidateSet.remove(fileId);
last = fileId;
}
}
}
});
}
// check we are not deleting file with ack for in-use journal files
Iterator<Integer> candidates = gcCandidateSet.iterator();
while (candidates.hasNext()) {
Integer candidate = candidates.next();
Set<Integer> referencedFileIds = ackMessageFileMap.get(candidate);
if (referencedFileIds != null) {
for (Integer referencedFileId : referencedFileIds) {
if (journal.getFileMap().containsKey(referencedFileId) && !gcCandidateSet.contains(referencedFileId)) {
// active file that is not targeted for deletion is referenced so don't delete
candidates.remove();
break;
}
}
if (gcCandidateSet.contains(candidate)) {
ackMessageFileMap.remove(candidate);
} else {
LOG.debug("not removing data file: " + candidate
+ " as contained ack(s) refer to referenced file: " + referencedFileIds);
}
}
}
if( !gcCandidateSet.isEmpty() ) {
LOG.debug("Cleanup removing the data files: "+gcCandidateSet);
journal.removeDataFiles(gcCandidateSet);
}
}
LOG.debug("Checkpoint done.");
}
private Location checkpointProducerAudit() throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(baos);
oout.writeObject(metadata.producerSequenceIdTracker);
oout.flush();
oout.close();
return store(new KahaProducerAuditCommand().setAudit(new Buffer(baos.toByteArray())));
}
public HashSet<Integer> getJournalFilesBeingReplicated() {
return journalFilesBeingReplicated;
}
// /////////////////////////////////////////////////////////////////
// StoredDestination related implementation methods.
// /////////////////////////////////////////////////////////////////
private final HashMap<String, StoredDestination> storedDestinations = new HashMap<String, StoredDestination>();
class StoredSubscription {
SubscriptionInfo subscriptionInfo;
String lastAckId;
Location lastAckLocation;
Location cursor;
}
static class MessageKeys {
final String messageId;
final Location location;
public MessageKeys(String messageId, Location location) {
this.messageId=messageId;
this.location=location;
}
@Override
public String toString() {
return "["+messageId+","+location+"]";
}
}
static protected class MessageKeysMarshaller extends VariableMarshaller<MessageKeys> {
static final MessageKeysMarshaller INSTANCE = new MessageKeysMarshaller();
public MessageKeys readPayload(DataInput dataIn) throws IOException {
return new MessageKeys(dataIn.readUTF(), LocationMarshaller.INSTANCE.readPayload(dataIn));
}
public void writePayload(MessageKeys object, DataOutput dataOut) throws IOException {
dataOut.writeUTF(object.messageId);
LocationMarshaller.INSTANCE.writePayload(object.location, dataOut);
}
}
class StoredDestination {
MessageOrderIndex orderIndex = new MessageOrderIndex();
BTreeIndex<Location, Long> locationIndex;
BTreeIndex<String, Long> messageIdIndex;
// These bits are only set for Topics
BTreeIndex<String, KahaSubscriptionCommand> subscriptions;
BTreeIndex<String, Long> subscriptionAcks;
HashMap<String, MessageOrderCursor> subscriptionCursors;
TreeMap<Long, HashSet<String>> ackPositions;
}
protected class StoredDestinationMarshaller extends VariableMarshaller<StoredDestination> {
public StoredDestination readPayload(DataInput dataIn) throws IOException {
StoredDestination value = new StoredDestination();
value.orderIndex.defaultPriorityIndex = new BTreeIndex<Long, MessageKeys>(pageFile, dataIn.readLong());
value.locationIndex = new BTreeIndex<Location, Long>(pageFile, dataIn.readLong());
value.messageIdIndex = new BTreeIndex<String, Long>(pageFile, dataIn.readLong());
if (dataIn.readBoolean()) {
value.subscriptions = new BTreeIndex<String, KahaSubscriptionCommand>(pageFile, dataIn.readLong());
value.subscriptionAcks = new BTreeIndex<String, Long>(pageFile, dataIn.readLong());
}
if (metadata.version >= 2) {
value.orderIndex.lowPriorityIndex = new BTreeIndex<Long, MessageKeys>(pageFile, dataIn.readLong());
value.orderIndex.highPriorityIndex = new BTreeIndex<Long, MessageKeys>(pageFile, dataIn.readLong());
}
return value;
}
public void writePayload(StoredDestination value, DataOutput dataOut) throws IOException {
dataOut.writeLong(value.orderIndex.defaultPriorityIndex.getPageId());
dataOut.writeLong(value.locationIndex.getPageId());
dataOut.writeLong(value.messageIdIndex.getPageId());
if (value.subscriptions != null) {
dataOut.writeBoolean(true);
dataOut.writeLong(value.subscriptions.getPageId());
dataOut.writeLong(value.subscriptionAcks.getPageId());
} else {
dataOut.writeBoolean(false);
}
if (metadata.version >= 2) {
dataOut.writeLong(value.orderIndex.lowPriorityIndex.getPageId());
dataOut.writeLong(value.orderIndex.highPriorityIndex.getPageId());
}
}
}
static class LocationMarshaller implements Marshaller<Location> {
final static LocationMarshaller INSTANCE = new LocationMarshaller();
public Location readPayload(DataInput dataIn) throws IOException {
Location rc = new Location();
rc.setDataFileId(dataIn.readInt());
rc.setOffset(dataIn.readInt());
return rc;
}
public void writePayload(Location object, DataOutput dataOut) throws IOException {
dataOut.writeInt(object.getDataFileId());
dataOut.writeInt(object.getOffset());
}
public int getFixedSize() {
return 8;
}
public Location deepCopy(Location source) {
return new Location(source);
}
public boolean isDeepCopySupported() {
return true;
}
}
static class KahaSubscriptionCommandMarshaller extends VariableMarshaller<KahaSubscriptionCommand> {
final static KahaSubscriptionCommandMarshaller INSTANCE = new KahaSubscriptionCommandMarshaller();
public KahaSubscriptionCommand readPayload(DataInput dataIn) throws IOException {
KahaSubscriptionCommand rc = new KahaSubscriptionCommand();
rc.mergeFramed((InputStream)dataIn);
return rc;
}
public void writePayload(KahaSubscriptionCommand object, DataOutput dataOut) throws IOException {
object.writeFramed((OutputStream)dataOut);
}
}
protected StoredDestination getStoredDestination(KahaDestination destination, Transaction tx) throws IOException {
String key = key(destination);
StoredDestination rc = storedDestinations.get(key);
if (rc == null) {
boolean topic = destination.getType() == KahaDestination.DestinationType.TOPIC || destination.getType() == KahaDestination.DestinationType.TEMP_TOPIC;
rc = loadStoredDestination(tx, key, topic);
// Cache it. We may want to remove/unload destinations from the
// cache that are not used for a while
// to reduce memory usage.
storedDestinations.put(key, rc);
}
return rc;
}
protected StoredDestination getExistingStoredDestination(KahaDestination destination, Transaction tx) throws IOException {
String key = key(destination);
StoredDestination rc = storedDestinations.get(key);
if (rc == null && metadata.destinations.containsKey(tx, key)) {
rc = getStoredDestination(destination, tx);
}
return rc;
}
/**
* @param tx
* @param key
* @param topic
* @return
* @throws IOException
*/
private StoredDestination loadStoredDestination(Transaction tx, String key, boolean topic) throws IOException {
// Try to load the existing indexes..
StoredDestination rc = metadata.destinations.get(tx, key);
if (rc == null) {
// Brand new destination.. allocate indexes for it.
rc = new StoredDestination();
rc.orderIndex.allocate(tx);
rc.locationIndex = new BTreeIndex<Location, Long>(pageFile, tx.allocate());
rc.messageIdIndex = new BTreeIndex<String, Long>(pageFile, tx.allocate());
if (topic) {
rc.subscriptions = new BTreeIndex<String, KahaSubscriptionCommand>(pageFile, tx.allocate());
rc.subscriptionAcks = new BTreeIndex<String, Long>(pageFile, tx.allocate());
}
metadata.destinations.put(tx, key, rc);
}
// Configure the marshalers and load.
rc.orderIndex.load(tx);
// Figure out the next key using the last entry in the destination.
rc.orderIndex.configureLast(tx);
rc.locationIndex.setKeyMarshaller(LocationMarshaller.INSTANCE);
rc.locationIndex.setValueMarshaller(LongMarshaller.INSTANCE);
rc.locationIndex.load(tx);
rc.messageIdIndex.setKeyMarshaller(StringMarshaller.INSTANCE);
rc.messageIdIndex.setValueMarshaller(LongMarshaller.INSTANCE);
rc.messageIdIndex.load(tx);
// If it was a topic...
if (topic) {
rc.subscriptions.setKeyMarshaller(StringMarshaller.INSTANCE);
rc.subscriptions.setValueMarshaller(KahaSubscriptionCommandMarshaller.INSTANCE);
rc.subscriptions.load(tx);
rc.subscriptionAcks.setKeyMarshaller(StringMarshaller.INSTANCE);
rc.subscriptionAcks.setValueMarshaller(LongMarshaller.INSTANCE);
rc.subscriptionAcks.load(tx);
rc.ackPositions = new TreeMap<Long, HashSet<String>>();
rc.subscriptionCursors = new HashMap<String, MessageOrderCursor>();
for (Iterator<Entry<String, Long>> iterator = rc.subscriptionAcks.iterator(tx); iterator.hasNext();) {
Entry<String, Long> entry = iterator.next();
addAckLocation(rc, entry.getValue(), entry.getKey());
}
if (rc.orderIndex.nextMessageId == 0) {
// check for existing durable sub all acked out - pull next seq from acks as messages are gone
if (!rc.ackPositions.isEmpty()) {
Long lastAckedMessageId = rc.ackPositions.lastKey();
if (lastAckedMessageId != NOT_ACKED) {
rc.orderIndex.nextMessageId = lastAckedMessageId+1;
}
}
}
}
return rc;
}
/**
* @param sd
* @param messageSequence
* @param subscriptionKey
*/
private void addAckLocation(StoredDestination sd, Long messageSequence, String subscriptionKey) {
HashSet<String> hs = sd.ackPositions.get(messageSequence);
if (hs == null) {
hs = new HashSet<String>();
sd.ackPositions.put(messageSequence, hs);
}
hs.add(subscriptionKey);
}
/**
* @param tx
* @param sd
* @param subscriptionKey
* @param sequenceId
* @throws IOException
*/
private void removeAckLocation(Transaction tx, StoredDestination sd, String subscriptionKey, Long sequenceId) throws IOException {
// Remove the sub from the previous location set..
if (sequenceId != null) {
HashSet<String> hs = sd.ackPositions.get(sequenceId);
if (hs != null) {
hs.remove(subscriptionKey);
if (hs.isEmpty()) {
HashSet<String> firstSet = sd.ackPositions.values().iterator().next();
sd.ackPositions.remove(sequenceId);
// Did we just empty out the first set in the
// ordered list of ack locations? Then it's time to
// delete some messages.
if (hs == firstSet) {
// Find all the entries that need to get deleted.
ArrayList<Entry<Long, MessageKeys>> deletes = new ArrayList<Entry<Long, MessageKeys>>();
sd.orderIndex.getDeleteList(tx, deletes, sequenceId);
// Do the actual deletes.
for (Entry<Long, MessageKeys> entry : deletes) {
sd.locationIndex.remove(tx, entry.getValue().location);
sd.messageIdIndex.remove(tx,entry.getValue().messageId);
sd.orderIndex.remove(tx,entry.getKey());
}
}
}
}
}
}
private String key(KahaDestination destination) {
return destination.getType().getNumber() + ":" + destination.getName();
}
// /////////////////////////////////////////////////////////////////
// Transaction related implementation methods.
// /////////////////////////////////////////////////////////////////
protected final LinkedHashMap<TransactionId, List<Operation>> inflightTransactions = new LinkedHashMap<TransactionId, List<Operation>>();
protected final LinkedHashMap<TransactionId, List<Operation>> preparedTransactions = new LinkedHashMap<TransactionId, List<Operation>>();
private List<Operation> getInflightTx(KahaTransactionInfo info, Location location) {
TransactionId key = key(info);
List<Operation> tx;
synchronized (inflightTransactions) {
tx = inflightTransactions.get(key);
if (tx == null) {
tx = Collections.synchronizedList(new ArrayList<Operation>());
inflightTransactions.put(key, tx);
}
}
return tx;
}
private TransactionId key(KahaTransactionInfo transactionInfo) {
if (transactionInfo.hasLocalTransacitonId()) {
KahaLocalTransactionId tx = transactionInfo.getLocalTransacitonId();
LocalTransactionId rc = new LocalTransactionId();
rc.setConnectionId(new ConnectionId(tx.getConnectionId()));
rc.setValue(tx.getTransacitonId());
return rc;
} else {
KahaXATransactionId tx = transactionInfo.getXaTransacitonId();
XATransactionId rc = new XATransactionId();
rc.setBranchQualifier(tx.getBranchQualifier().toByteArray());
rc.setGlobalTransactionId(tx.getGlobalTransactionId().toByteArray());
rc.setFormatId(tx.getFormatId());
return rc;
}
}
abstract class Operation {
final Location location;
public Operation(Location location) {
this.location = location;
}
public Location getLocation() {
return location;
}
abstract public void execute(Transaction tx) throws IOException;
}
class AddOpperation extends Operation {
final KahaAddMessageCommand command;
public AddOpperation(KahaAddMessageCommand command, Location location) {
super(location);
this.command = command;
}
@Override
public void execute(Transaction tx) throws IOException {
upadateIndex(tx, command, location);
}
public KahaAddMessageCommand getCommand() {
return command;
}
}
class RemoveOpperation extends Operation {
final KahaRemoveMessageCommand command;
public RemoveOpperation(KahaRemoveMessageCommand command, Location location) {
super(location);
this.command = command;
}
@Override
public void execute(Transaction tx) throws IOException {
updateIndex(tx, command, location);
}
public KahaRemoveMessageCommand getCommand() {
return command;
}
}
// /////////////////////////////////////////////////////////////////
// Initialization related implementation methods.
// /////////////////////////////////////////////////////////////////
private PageFile createPageFile() {
PageFile index = new PageFile(directory, "db");
index.setEnableWriteThread(isEnableIndexWriteAsync());
index.setWriteBatchSize(getIndexWriteBatchSize());
index.setPageCacheSize(indexCacheSize);
return index;
}
private Journal createJournal() throws IOException {
Journal manager = new Journal();
manager.setDirectory(directory);
manager.setMaxFileLength(getJournalMaxFileLength());
manager.setCheckForCorruptionOnStartup(checkForCorruptJournalFiles);
manager.setChecksum(checksumJournalFiles || checkForCorruptJournalFiles);
manager.setWriteBatchSize(getJournalMaxWriteBatchSize());
manager.setArchiveDataLogs(isArchiveDataLogs());
manager.setSizeAccumulator(storeSize);
if (getDirectoryArchive() != null) {
IOHelper.mkdirs(getDirectoryArchive());
manager.setDirectoryArchive(getDirectoryArchive());
}
return manager;
}
public int getJournalMaxWriteBatchSize() {
return journalMaxWriteBatchSize;
}
public void setJournalMaxWriteBatchSize(int journalMaxWriteBatchSize) {
this.journalMaxWriteBatchSize = journalMaxWriteBatchSize;
}
public File getDirectory() {
return directory;
}
public void setDirectory(File directory) {
this.directory = directory;
}
public boolean isDeleteAllMessages() {
return deleteAllMessages;
}
public void setDeleteAllMessages(boolean deleteAllMessages) {
this.deleteAllMessages = deleteAllMessages;
}
public void setIndexWriteBatchSize(int setIndexWriteBatchSize) {
this.setIndexWriteBatchSize = setIndexWriteBatchSize;
}
public int getIndexWriteBatchSize() {
return setIndexWriteBatchSize;
}
public void setEnableIndexWriteAsync(boolean enableIndexWriteAsync) {
this.enableIndexWriteAsync = enableIndexWriteAsync;
}
boolean isEnableIndexWriteAsync() {
return enableIndexWriteAsync;
}
public boolean isEnableJournalDiskSyncs() {
return enableJournalDiskSyncs;
}
public void setEnableJournalDiskSyncs(boolean syncWrites) {
this.enableJournalDiskSyncs = syncWrites;
}
public long getCheckpointInterval() {
return checkpointInterval;
}
public void setCheckpointInterval(long checkpointInterval) {
this.checkpointInterval = checkpointInterval;
}
public long getCleanupInterval() {
return cleanupInterval;
}
public void setCleanupInterval(long cleanupInterval) {
this.cleanupInterval = cleanupInterval;
}
public void setJournalMaxFileLength(int journalMaxFileLength) {
this.journalMaxFileLength = journalMaxFileLength;
}
public int getJournalMaxFileLength() {
return journalMaxFileLength;
}
public void setMaxFailoverProducersToTrack(int maxFailoverProducersToTrack) {
this.metadata.producerSequenceIdTracker.setMaximumNumberOfProducersToTrack(maxFailoverProducersToTrack);
}
public int getMaxFailoverProducersToTrack() {
return this.metadata.producerSequenceIdTracker.getMaximumNumberOfProducersToTrack();
}
public void setFailoverProducersAuditDepth(int failoverProducersAuditDepth) {
this.metadata.producerSequenceIdTracker.setAuditDepth(failoverProducersAuditDepth);
}
public int getFailoverProducersAuditDepth() {
return this.metadata.producerSequenceIdTracker.getAuditDepth();
}
public PageFile getPageFile() {
if (pageFile == null) {
pageFile = createPageFile();
}
return pageFile;
}
public Journal getJournal() throws IOException {
if (journal == null) {
journal = createJournal();
}
return journal;
}
public boolean isFailIfDatabaseIsLocked() {
return failIfDatabaseIsLocked;
}
public void setFailIfDatabaseIsLocked(boolean failIfDatabaseIsLocked) {
this.failIfDatabaseIsLocked = failIfDatabaseIsLocked;
}
public boolean isIgnoreMissingJournalfiles() {
return ignoreMissingJournalfiles;
}
public void setIgnoreMissingJournalfiles(boolean ignoreMissingJournalfiles) {
this.ignoreMissingJournalfiles = ignoreMissingJournalfiles;
}
public int getIndexCacheSize() {
return indexCacheSize;
}
public void setIndexCacheSize(int indexCacheSize) {
this.indexCacheSize = indexCacheSize;
}
public boolean isCheckForCorruptJournalFiles() {
return checkForCorruptJournalFiles;
}
public void setCheckForCorruptJournalFiles(boolean checkForCorruptJournalFiles) {
this.checkForCorruptJournalFiles = checkForCorruptJournalFiles;
}
public boolean isChecksumJournalFiles() {
return checksumJournalFiles;
}
public void setChecksumJournalFiles(boolean checksumJournalFiles) {
this.checksumJournalFiles = checksumJournalFiles;
}
public void setBrokerService(BrokerService brokerService) {
this.brokerService = brokerService;
}
/**
* @return the archiveDataLogs
*/
public boolean isArchiveDataLogs() {
return this.archiveDataLogs;
}
/**
* @param archiveDataLogs the archiveDataLogs to set
*/
public void setArchiveDataLogs(boolean archiveDataLogs) {
this.archiveDataLogs = archiveDataLogs;
}
/**
* @return the directoryArchive
*/
public File getDirectoryArchive() {
return this.directoryArchive;
}
/**
* @param directoryArchive the directoryArchive to set
*/
public void setDirectoryArchive(File directoryArchive) {
this.directoryArchive = directoryArchive;
}
/**
* @return the databaseLockedWaitDelay
*/
public int getDatabaseLockedWaitDelay() {
return this.databaseLockedWaitDelay;
}
/**
* @param databaseLockedWaitDelay the databaseLockedWaitDelay to set
*/
public void setDatabaseLockedWaitDelay(int databaseLockedWaitDelay) {
this.databaseLockedWaitDelay = databaseLockedWaitDelay;
}
class MessageOrderCursor{
long defaultCursorPosition;
long lowPriorityCursorPosition;
long highPriorityCursorPosition;
MessageOrderCursor(){
}
MessageOrderCursor(long position){
this.defaultCursorPosition=position;
this.lowPriorityCursorPosition=position;
this.highPriorityCursorPosition=position;
}
MessageOrderCursor(MessageOrderCursor other){
this.defaultCursorPosition=other.defaultCursorPosition;
this.lowPriorityCursorPosition=other.lowPriorityCursorPosition;
this.highPriorityCursorPosition=other.highPriorityCursorPosition;
}
MessageOrderCursor copy() {
return new MessageOrderCursor(this);
}
void reset() {
this.defaultCursorPosition=0;
this.highPriorityCursorPosition=0;
this.lowPriorityCursorPosition=0;
}
void increment() {
if (defaultCursorPosition!=0) {
defaultCursorPosition++;
}
if (highPriorityCursorPosition!=0) {
highPriorityCursorPosition++;
}
if (lowPriorityCursorPosition!=0) {
lowPriorityCursorPosition++;
}
}
}
class MessageOrderIndex{
long nextMessageId;
BTreeIndex<Long, MessageKeys> defaultPriorityIndex;
BTreeIndex<Long, MessageKeys> lowPriorityIndex;
BTreeIndex<Long, MessageKeys> highPriorityIndex;
MessageOrderCursor cursor = new MessageOrderCursor();
Long lastDefaultKey;
Long lastHighKey;
Long lastLowKey;
MessageKeys remove(Transaction tx, Long key) throws IOException {
MessageKeys result = defaultPriorityIndex.remove(tx, key);
if (result == null && highPriorityIndex!=null) {
result = highPriorityIndex.remove(tx, key);
if (result ==null && lowPriorityIndex!=null) {
result = lowPriorityIndex.remove(tx, key);
}
}
return result;
}
void load(Transaction tx) throws IOException {
defaultPriorityIndex.setKeyMarshaller(LongMarshaller.INSTANCE);
defaultPriorityIndex.setValueMarshaller(MessageKeysMarshaller.INSTANCE);
defaultPriorityIndex.load(tx);
if (metadata.version >= 2) {
lowPriorityIndex.setKeyMarshaller(LongMarshaller.INSTANCE);
lowPriorityIndex.setValueMarshaller(MessageKeysMarshaller.INSTANCE);
lowPriorityIndex.load(tx);
highPriorityIndex.setKeyMarshaller(LongMarshaller.INSTANCE);
highPriorityIndex.setValueMarshaller(MessageKeysMarshaller.INSTANCE);
highPriorityIndex.load(tx);
}
}
void allocate(Transaction tx) throws IOException {
defaultPriorityIndex = new BTreeIndex<Long, MessageKeys>(pageFile, tx.allocate());
if (metadata.version >= 2) {
lowPriorityIndex = new BTreeIndex<Long, MessageKeys>(pageFile, tx.allocate());
highPriorityIndex = new BTreeIndex<Long, MessageKeys>(pageFile, tx.allocate());
}
}
void configureLast(Transaction tx) throws IOException {
// Figure out the next key using the last entry in the destination.
if (highPriorityIndex != null) {
Entry<Long, MessageKeys> lastEntry = highPriorityIndex.getLast(tx);
if (lastEntry != null) {
nextMessageId = lastEntry.getKey() + 1;
} else {
lastEntry = defaultPriorityIndex.getLast(tx);
if (lastEntry != null) {
nextMessageId = lastEntry.getKey() + 1;
} else {
lastEntry = lowPriorityIndex.getLast(tx);
if (lastEntry != null) {
nextMessageId = lastEntry.getKey() + 1;
}
}
}
} else {
Entry<Long, MessageKeys> lastEntry = defaultPriorityIndex.getLast(tx);
if (lastEntry != null) {
nextMessageId = lastEntry.getKey() + 1;
}
}
}
void remove(Transaction tx) throws IOException {
defaultPriorityIndex.clear(tx);
defaultPriorityIndex.unload(tx);
tx.free(defaultPriorityIndex.getPageId());
if (lowPriorityIndex != null) {
lowPriorityIndex.clear(tx);
lowPriorityIndex.unload(tx);
tx.free(lowPriorityIndex.getPageId());
}
if (highPriorityIndex != null) {
highPriorityIndex.clear(tx);
highPriorityIndex.unload(tx);
tx.free(highPriorityIndex.getPageId());
}
}
void resetCursorPosition() {
this.cursor.reset();
lastDefaultKey = null;
lastHighKey = null;
lastLowKey = null;
}
void setBatch(Transaction tx, Long sequence) throws IOException {
if (sequence != null) {
Long nextPosition = new Long(sequence.longValue() + 1);
if (defaultPriorityIndex.containsKey(tx, sequence)) {
lastDefaultKey = nextPosition;
cursor.defaultCursorPosition = nextPosition.longValue();
} else if (highPriorityIndex != null) {
if (highPriorityIndex.containsKey(tx, sequence)) {
lastHighKey = nextPosition;
cursor.highPriorityCursorPosition = nextPosition.longValue();
} else if (lowPriorityIndex.containsKey(tx, sequence)) {
lastLowKey = nextPosition;
cursor.lowPriorityCursorPosition = nextPosition.longValue();
}
} else {
lastDefaultKey = nextPosition;
cursor.defaultCursorPosition = nextPosition.longValue();
}
}
}
void stoppedIterating() {
if (lastDefaultKey!=null) {
cursor.defaultCursorPosition=lastDefaultKey.longValue()+1;
}
if (lastHighKey!=null) {
cursor.highPriorityCursorPosition=lastHighKey.longValue()+1;
}
if (lastLowKey!=null) {
cursor.lowPriorityCursorPosition=lastLowKey.longValue()+1;
}
lastDefaultKey = null;
lastHighKey = null;
lastLowKey = null;
}
void getDeleteList(Transaction tx, ArrayList<Entry<Long, MessageKeys>> deletes, Long sequenceId)
throws IOException {
getDeleteList(tx, deletes, defaultPriorityIndex, sequenceId);
if (highPriorityIndex != null) {
getDeleteList(tx, deletes, highPriorityIndex, sequenceId);
}
if (lowPriorityIndex != null) {
getDeleteList(tx, deletes, lowPriorityIndex, sequenceId);
}
}
void getDeleteList(Transaction tx, ArrayList<Entry<Long, MessageKeys>> deletes,
BTreeIndex<Long, MessageKeys> index, Long sequenceId) throws IOException {
for (Iterator<Entry<Long, MessageKeys>> iterator = index.iterator(tx); iterator.hasNext();) {
Entry<Long, MessageKeys> entry = iterator.next();
if (entry.getKey().compareTo(sequenceId) <= 0) {
// We don't do the actually delete while we are
// iterating the BTree since
// iterating would fail.
deletes.add(entry);
} else {
// no point in iterating the in-order sequences anymore
break;
}
}
}
long getNextMessageId(int priority) {
return nextMessageId++;
}
MessageKeys get(Transaction tx, Long key) throws IOException {
MessageKeys result = defaultPriorityIndex.get(tx, key);
if (result == null) {
result = highPriorityIndex.get(tx, key);
if (result == null) {
result = lowPriorityIndex.get(tx, key);
}
}
return result;
}
MessageKeys put(Transaction tx, int priority, Long key, MessageKeys value) throws IOException {
if (priority == javax.jms.Message.DEFAULT_PRIORITY) {
return defaultPriorityIndex.put(tx, key, value);
} else if (priority > javax.jms.Message.DEFAULT_PRIORITY) {
return highPriorityIndex.put(tx, key, value);
} else {
return lowPriorityIndex.put(tx, key, value);
}
}
Iterator<Entry<Long, MessageKeys>> iterator(Transaction tx) throws IOException{
return new MessageOrderIterator(tx,cursor);
}
Iterator<Entry<Long, MessageKeys>> iterator(Transaction tx, MessageOrderCursor m) throws IOException{
return new MessageOrderIterator(tx,m);
}
class MessageOrderIterator implements Iterator<Entry<Long, MessageKeys>>{
Iterator<Entry<Long, MessageKeys>>currentIterator;
final Iterator<Entry<Long, MessageKeys>>highIterator;
final Iterator<Entry<Long, MessageKeys>>defaultIterator;
final Iterator<Entry<Long, MessageKeys>>lowIterator;
Long lastKey;
MessageOrderIterator(Transaction tx, MessageOrderCursor m) throws IOException {
this.defaultIterator = defaultPriorityIndex.iterator(tx, m.defaultCursorPosition);
if (highPriorityIndex != null) {
this.highIterator = highPriorityIndex.iterator(tx, m.highPriorityCursorPosition);
} else {
this.highIterator = null;
}
if (lowPriorityIndex != null) {
this.lowIterator = lowPriorityIndex.iterator(tx, m.lowPriorityCursorPosition);
} else {
this.lowIterator = null;
}
}
public boolean hasNext() {
if (currentIterator == null) {
if (highIterator != null) {
if (highIterator.hasNext()) {
currentIterator = highIterator;
return currentIterator.hasNext();
}
if (defaultIterator.hasNext()) {
currentIterator = defaultIterator;
return currentIterator.hasNext();
}
if (lowIterator.hasNext()) {
currentIterator = lowIterator;
return currentIterator.hasNext();
}
return false;
} else {
currentIterator = defaultIterator;
return currentIterator.hasNext();
}
}
if (highIterator != null) {
if (currentIterator.hasNext()) {
return true;
}
if (currentIterator == highIterator) {
if (defaultIterator.hasNext()) {
currentIterator = defaultIterator;
return currentIterator.hasNext();
}
if (lowIterator.hasNext()) {
currentIterator = lowIterator;
return currentIterator.hasNext();
}
return false;
}
if (currentIterator == defaultIterator) {
if (lowIterator.hasNext()) {
currentIterator = lowIterator;
return currentIterator.hasNext();
}
return false;
}
}
return currentIterator.hasNext();
}
public Entry<Long, MessageKeys> next() {
Entry<Long, MessageKeys> result = currentIterator.next();
if (result != null) {
Long key = result.getKey();
if (highIterator != null) {
if (currentIterator == defaultIterator) {
lastDefaultKey = key;
} else if (currentIterator == highIterator) {
lastHighKey = key;
} else {
lastLowKey = key;
}
} else {
lastDefaultKey = key;
}
}
return result;
}
public void remove() {
throw new UnsupportedOperationException();
}
}
}
}