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/**
* 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.ByteArrayInputStream;
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.InterruptedIOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.Callable;
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.MessageAck;
import org.apache.activemq.command.TransactionId;
import org.apache.activemq.openwire.OpenWireFormat;
import org.apache.activemq.protobuf.Buffer;
import org.apache.activemq.store.kahadb.data.KahaAckMessageFileMapCommand;
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.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.KahaUpdateMessageCommand;
import org.apache.activemq.store.kahadb.disk.index.BTreeIndex;
import org.apache.activemq.store.kahadb.disk.index.BTreeVisitor;
import org.apache.activemq.store.kahadb.disk.index.ListIndex;
import org.apache.activemq.store.kahadb.disk.journal.DataFile;
import org.apache.activemq.store.kahadb.disk.journal.Journal;
import org.apache.activemq.store.kahadb.disk.journal.Location;
import org.apache.activemq.store.kahadb.disk.page.Page;
import org.apache.activemq.store.kahadb.disk.page.PageFile;
import org.apache.activemq.store.kahadb.disk.page.Transaction;
import org.apache.activemq.store.kahadb.disk.util.LocationMarshaller;
import org.apache.activemq.store.kahadb.disk.util.LongMarshaller;
import org.apache.activemq.store.kahadb.disk.util.Marshaller;
import org.apache.activemq.store.kahadb.disk.util.Sequence;
import org.apache.activemq.store.kahadb.disk.util.SequenceSet;
import org.apache.activemq.store.kahadb.disk.util.StringMarshaller;
import org.apache.activemq.store.kahadb.disk.util.VariableMarshaller;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.util.DataByteArrayInputStream;
import org.apache.activemq.util.DataByteArrayOutputStream;
import org.apache.activemq.util.IOHelper;
import org.apache.activemq.util.ServiceStopper;
import org.apache.activemq.util.ServiceSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract 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.getInteger(PROPERTY_LOG_SLOW_ACCESS_TIME, 0);
public static final File DEFAULT_DIRECTORY = new File("KahaDB");
protected static final Buffer UNMATCHED;
static {
UNMATCHED = new Buffer(new byte[]{});
}
private static final Logger LOG = LoggerFactory.getLogger(MessageDatabase.class);
static final int CLOSED_STATE = 1;
static final int OPEN_STATE = 2;
static final long NOT_ACKED = -1;
static final int VERSION = 5;
protected class Metadata {
protected Page page;
protected int state;
protected BTreeIndex destinations;
protected Location lastUpdate;
protected Location firstInProgressTransactionLocation;
protected Location producerSequenceIdTrackerLocation = null;
protected Location ackMessageFileMapLocation = null;
protected transient ActiveMQMessageAuditNoSync producerSequenceIdTracker = new ActiveMQMessageAuditNoSync();
protected transient Map> ackMessageFileMap = new HashMap>();
protected int version = VERSION;
protected int openwireVersion = OpenWireFormat.DEFAULT_VERSION;
public void read(DataInput is) throws IOException {
state = is.readInt();
destinations = new BTreeIndex(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;
}
if (version >= 5 && is.readBoolean()) {
ackMessageFileMapLocation = LocationMarshaller.INSTANCE.readPayload(is);
} else {
ackMessageFileMapLocation = null;
}
try {
openwireVersion = is.readInt();
} catch (EOFException expectedOnUpgrade) {
openwireVersion = OpenWireFormat.DEFAULT_VERSION;
}
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);
}
os.writeInt(VERSION);
if (ackMessageFileMapLocation != null) {
os.writeBoolean(true);
LocationMarshaller.INSTANCE.writePayload(ackMessageFileMapLocation, os);
} else {
os.writeBoolean(false);
}
os.writeInt(this.openwireVersion);
}
}
class MetadataMarshaller extends VariableMarshaller {
@Override
public Metadata readPayload(DataInput dataIn) throws IOException {
Metadata rc = createMetadata();
rc.read(dataIn);
return rc;
}
@Override
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 = DEFAULT_DIRECTORY;
protected File indexDirectory = null;
protected Thread checkpointThread;
protected boolean enableJournalDiskSyncs=true;
protected boolean archiveDataLogs;
protected File directoryArchive;
protected AtomicLong journalSize = 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 boolean ignoreMissingJournalfiles = false;
private int indexCacheSize = 10000;
private boolean checkForCorruptJournalFiles = false;
private boolean checksumJournalFiles = true;
protected boolean forceRecoverIndex = false;
private final Object checkpointThreadLock = new Object();
private boolean rewriteOnRedelivery = false;
private boolean archiveCorruptedIndex = false;
private boolean useIndexLFRUEviction = false;
private float indexLFUEvictionFactor = 0.2f;
private boolean enableIndexDiskSyncs = true;
private boolean enableIndexRecoveryFile = true;
private boolean enableIndexPageCaching = true;
ReentrantReadWriteLock checkpointLock = new ReentrantReadWriteLock();
@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() {
@Override
public void execute(Transaction tx) throws IOException {
if (pageFile.getPageCount() == 0) {
// First time this is created.. Initialize the metadata
Page page = tx.allocate();
assert page.getPageId() == 0;
page.set(metadata);
metadata.page = page;
metadata.state = CLOSED_STATE;
metadata.destinations = new BTreeIndex(pageFile, tx.allocate().getPageId());
tx.store(metadata.page, metadataMarshaller, true);
} else {
Page 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);
}
});
// 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() {
@Override
public void execute(Transaction tx) throws IOException {
for (Iterator> iterator = metadata.destinations.iterator(tx); iterator.hasNext();) {
Entry entry = iterator.next();
StoredDestination sd = loadStoredDestination(tx, entry.getKey(), entry.getValue().subscriptions!=null);
storedDestinations.put(entry.getKey(), sd);
if (checkForCorruptJournalFiles) {
// sanity check the index also
if (!entry.getValue().locationIndex.isEmpty(tx)) {
if (entry.getValue().orderIndex.nextMessageId <= 0) {
throw new IOException("Detected uninitialized orderIndex nextMessageId with pending messages for " + entry.getKey());
}
}
}
}
}
});
pageFile.flush();
} finally {
this.indexLock.writeLock().unlock();
}
}
private void startCheckpoint() {
if (checkpointInterval == 0 && cleanupInterval == 0) {
LOG.info("periodic checkpoint/cleanup disabled, will ocurr on clean shutdown/restart");
return;
}
synchronized (checkpointThreadLock) {
boolean start = false;
if (checkpointThread == null) {
start = true;
} else if (!checkpointThread.isAlive()) {
start = true;
LOG.info("KahaDB: Recovering checkpoint thread after death");
}
if (start) {
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 > 0 ? checkpointInterval : cleanupInterval, 500);
while (opened.get()) {
Thread.sleep(sleepTime);
long now = System.currentTimeMillis();
if( cleanupInterval > 0 && (now - lastCleanup >= cleanupInterval) ) {
checkpointCleanup(true);
lastCleanup = now;
lastCheckpoint = now;
} else if( checkpointInterval > 0 && (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();
try {
loadPageFile();
} catch (Throwable t) {
LOG.warn("Index corrupted. Recovering the index through journal replay. Cause:" + t);
if (LOG.isDebugEnabled()) {
LOG.debug("Index load failure", t);
}
// try to recover index
try {
pageFile.unload();
} catch (Exception ignore) {}
if (archiveCorruptedIndex) {
pageFile.archive();
} else {
pageFile.delete();
}
metadata = createMetadata();
pageFile = null;
loadPageFile();
}
startCheckpoint();
recover();
}
}
public void load() throws IOException {
this.indexLock.writeLock().lock();
IOHelper.mkdirs(directory);
try {
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)) {
checkpointLock.writeLock().lock();
try {
if (metadata.page != null) {
checkpointUpdate(true);
}
pageFile.unload();
metadata = createMetadata();
} finally {
checkpointLock.writeLock().unlock();
}
journal.close();
synchronized (checkpointThreadLock) {
if (checkpointThread != null) {
checkpointThread.join();
}
}
}
}
public void unload() throws IOException, InterruptedException {
this.indexLock.writeLock().lock();
try {
if( pageFile != null && pageFile.isLoaded() ) {
metadata.state = CLOSED_STATE;
metadata.firstInProgressTransactionLocation = getInProgressTxLocationRange()[0];
if (metadata.page != null) {
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
tx.store(metadata.page, metadataMarshaller, true);
}
});
}
}
} finally {
this.indexLock.writeLock().unlock();
}
close();
}
// public for testing
@SuppressWarnings("rawtypes")
public Location[] getInProgressTxLocationRange() {
Location[] range = new Location[]{null, null};
synchronized (inflightTransactions) {
if (!inflightTransactions.isEmpty()) {
for (List ops : inflightTransactions.values()) {
if (!ops.isEmpty()) {
trackMaxAndMin(range, ops);
}
}
}
if (!preparedTransactions.isEmpty()) {
for (List ops : preparedTransactions.values()) {
if (!ops.isEmpty()) {
trackMaxAndMin(range, ops);
}
}
}
}
return range;
}
@SuppressWarnings("rawtypes")
private void trackMaxAndMin(Location[] range, List ops) {
Location t = ops.get(0).getLocation();
if (range[0]==null || t.compareTo(range[0]) <= 0) {
range[0] = t;
}
t = ops.get(ops.size() -1).getLocation();
if (range[1]==null || t.compareTo(range[1]) >= 0) {
range[1] = t;
}
}
class TranInfo {
TransactionId id;
Location location;
class opCount {
int add;
int remove;
}
HashMap destinationOpCount = new HashMap();
@SuppressWarnings("rawtypes")
public void track(Operation operation) {
if (location == null ) {
location = operation.getLocation();
}
KahaDestination destination;
boolean isAdd = false;
if (operation instanceof AddOperation) {
AddOperation add = (AddOperation) operation;
destination = add.getCommand().getDestination();
isAdd = true;
} else {
RemoveOperation removeOpperation = (RemoveOperation) operation;
destination = removeOpperation.getCommand().getDestination();
}
opCount opCount = destinationOpCount.get(destination);
if (opCount == null) {
opCount = new opCount();
destinationOpCount.put(destination, opCount);
}
if (isAdd) {
opCount.add++;
} else {
opCount.remove++;
}
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append(location).append(";").append(id).append(";\n");
for (Entry op : destinationOpCount.entrySet()) {
buffer.append(op.getKey()).append('+').append(op.getValue().add).append(',').append('-').append(op.getValue().remove).append(';');
}
return buffer.toString();
}
}
@SuppressWarnings("rawtypes")
public String getTransactions() {
ArrayList infos = new ArrayList();
synchronized (inflightTransactions) {
if (!inflightTransactions.isEmpty()) {
for (Entry> entry : inflightTransactions.entrySet()) {
TranInfo info = new TranInfo();
info.id = entry.getKey();
for (Operation operation : entry.getValue()) {
info.track(operation);
}
infos.add(info);
}
}
}
synchronized (preparedTransactions) {
if (!preparedTransactions.isEmpty()) {
for (Entry> entry : preparedTransactions.entrySet()) {
TranInfo info = new TranInfo();
info.id = entry.getKey();
for (Operation operation : entry.getValue()) {
info.track(operation);
}
infos.add(info);
}
}
}
return infos.toString();
}
/**
* 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 ackMessageFileLocation = recoverAckMessageFileMap();
Location lastIndoubtPosition = getRecoveryPosition();
Location recoveryPosition = minimum(producerAuditPosition, ackMessageFileLocation);
recoveryPosition = minimum(recoveryPosition, 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);
if (LOG.isInfoEnabled() && redoCounter % 100000 == 0) {
LOG.info("@" + recoveryPosition + ", " + redoCounter + " entries recovered ..");
}
}
if (LOG.isInfoEnabled()) {
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() {
@Override
public void execute(Transaction tx) throws IOException {
recoverIndex(tx);
}
});
// rollback any recovered inflight local transactions, and discard any inflight XA transactions.
Set toRollback = new HashSet();
Set toDiscard = new HashSet();
synchronized (inflightTransactions) {
for (Iterator it = inflightTransactions.keySet().iterator(); it.hasNext(); ) {
TransactionId id = it.next();
if (id.isLocalTransaction()) {
toRollback.add(id);
} else {
toDiscard.add(id);
}
}
for (TransactionId tx: toRollback) {
if (LOG.isDebugEnabled()) {
LOG.debug("rolling back recovered indoubt local transaction " + tx);
}
store(new KahaRollbackCommand().setTransactionInfo(TransactionIdConversion.convertToLocal(tx)), false, null, null);
}
for (TransactionId tx: toDiscard) {
if (LOG.isDebugEnabled()) {
LOG.debug("discarding recovered in-flight XA transaction " + tx);
}
inflightTransactions.remove(tx);
}
}
synchronized (preparedTransactions) {
for (TransactionId txId : preparedTransactions.keySet()) {
LOG.warn("Recovered prepared XA TX: [{}]", txId);
}
}
} finally {
this.indexLock.writeLock().unlock();
}
}
@SuppressWarnings("unused")
private KahaTransactionInfo createLocalTransactionInfo(TransactionId tx) {
return TransactionIdConversion.convertToLocal(tx);
}
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());
int maxNumProducers = getMaxFailoverProducersToTrack();
int maxAuditDepth = getFailoverProducersAuditDepth();
metadata.producerSequenceIdTracker = (ActiveMQMessageAuditNoSync) objectIn.readObject();
metadata.producerSequenceIdTracker.setAuditDepth(maxAuditDepth);
metadata.producerSequenceIdTracker.setMaximumNumberOfProducersToTrack(maxNumProducers);
return journal.getNextLocation(metadata.producerSequenceIdTrackerLocation);
} catch (Exception e) {
LOG.warn("Cannot recover message audit", e);
return journal.getNextLocation(null);
}
} else {
// got no audit stored so got to recreate via replay from start of the journal
return journal.getNextLocation(null);
}
}
@SuppressWarnings("unchecked")
private Location recoverAckMessageFileMap() throws IOException {
if (metadata.ackMessageFileMapLocation != null) {
KahaAckMessageFileMapCommand audit = (KahaAckMessageFileMapCommand) load(metadata.ackMessageFileMapLocation);
try {
ObjectInputStream objectIn = new ObjectInputStream(audit.getAckMessageFileMap().newInput());
metadata.ackMessageFileMap = (Map>) objectIn.readObject();
return journal.getNextLocation(metadata.ackMessageFileMapLocation);
} catch (Exception e) {
LOG.warn("Cannot recover ackMessageFileMap", e);
return journal.getNextLocation(null);
}
} else {
// got no ackMessageFileMap 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 matches = new ArrayList();
// Find all the Locations that are >= than the last Append Location.
sd.locationIndex.visit(tx, new BTreeVisitor.GTEVisitor(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(keys.messageId);
undoCounter++;
// TODO: do we need to modify the ack positions for the pub sub case?
}
}
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.
if (LOG.isInfoEnabled()) {
long end = System.currentTimeMillis();
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() {
int last=-1;
@Override
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());
}
}
@Override
public void visit(List keys, List values) {
for (Location l : keys) {
int fileId = l.getDataFileId();
if( last != fileId ) {
ss.add(fileId);
last = fileId;
}
}
}
});
}
HashSet missingJournalFiles = new HashSet();
while (!ss.isEmpty()) {
missingJournalFiles.add((int) ss.removeFirst());
}
missingJournalFiles.removeAll(journal.getFileMap().keySet());
if (!missingJournalFiles.isEmpty()) {
if (LOG.isInfoEnabled()) {
LOG.info("Some journal files are missing: " + missingJournalFiles);
}
}
ArrayList> missingPredicates = new ArrayList>();
for (Integer missing : missingJournalFiles) {
missingPredicates.add(new BTreeVisitor.BetweenVisitor(new Location(missing, 0), new Location(missing + 1, 0)));
}
if (checkForCorruptJournalFiles) {
Collection dataFiles = journal.getFileMap().values();
for (DataFile dataFile : dataFiles) {
int id = dataFile.getDataFileId();
missingPredicates.add(new BTreeVisitor.BetweenVisitor(new Location(id, dataFile.getLength()), new Location(id + 1, 0)));
Sequence seq = dataFile.getCorruptedBlocks().getHead();
while (seq != null) {
missingPredicates.add(new BTreeVisitor.BetweenVisitor(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 matches = new ArrayList();
sd.locationIndex.visit(tx, new BTreeVisitor.OrVisitor(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.");
}
}
}
}
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.
if (LOG.isInfoEnabled()) {
long end = System.currentTimeMillis();
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, (IndexAware) null);
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;
}
} finally {
this.indexLock.writeLock().unlock();
}
checkpointUpdate(cleanup);
long end = System.currentTimeMillis();
if (LOG_SLOW_ACCESS_TIME > 0 && end - start > LOG_SLOW_ACCESS_TIME) {
if (LOG.isInfoEnabled()) {
LOG.info("Slow KahaDB access: cleanup took " + (end - start));
}
}
}
public ByteSequence toByteSequence(JournalCommand data) throws IOException {
int size = data.serializedSizeFramed();
DataByteArrayOutputStream os = new DataByteArrayOutputStream(size + 1);
os.writeByte(data.type().getNumber());
data.writeFramed(os);
return os.toByteSequence();
}
// /////////////////////////////////////////////////////////////////
// Methods call by the broker to update and query the store.
// /////////////////////////////////////////////////////////////////
public Location store(JournalCommand data) throws IOException {
return store(data, false, null,null);
}
public Location store(JournalCommand data, Runnable onJournalStoreComplete) throws IOException {
return store(data, false, null, null, onJournalStoreComplete);
}
public Location store(JournalCommand data, boolean sync, IndexAware before,Runnable after) throws IOException {
return store(data, sync, before, after, 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, IndexAware before, Runnable after, Runnable onJournalStoreComplete) throws IOException {
try {
ByteSequence sequence = toByteSequence(data);
Location location;
checkpointLock.readLock().lock();
try {
long start = System.currentTimeMillis();
location = onJournalStoreComplete == null ? journal.write(sequence, sync) : journal.write(sequence, onJournalStoreComplete) ;
long start2 = System.currentTimeMillis();
process(data, location, before);
long end = System.currentTimeMillis();
if( LOG_SLOW_ACCESS_TIME>0 && end-start > LOG_SLOW_ACCESS_TIME) {
if (LOG.isInfoEnabled()) {
LOG.info("Slow KahaDB access: Journal append took: "+(start2-start)+" ms, Index update took "+(end-start2)+" ms");
}
}
} finally{
checkpointLock.readLock().unlock();
}
if (after != null) {
after.run();
}
if (checkpointThread != null && !checkpointThread.isAlive() && opened.get()) {
startCheckpoint();
}
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 {
long start = System.currentTimeMillis();
ByteSequence data = journal.read(location);
long end = System.currentTimeMillis();
if( LOG_SLOW_ACCESS_TIME>0 && end-start > LOG_SLOW_ACCESS_TIME) {
if (LOG.isInfoEnabled()) {
LOG.info("Slow KahaDB access: Journal read took: "+(end-start)+" ms");
}
}
DataByteArrayInputStream is = new DataByteArrayInputStream(data);
byte readByte = is.readByte();
KahaEntryType type = KahaEntryType.valueOf(readByte);
if( type == null ) {
try {
is.close();
} catch (IOException e) {}
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) {
if (data instanceof KahaSubscriptionCommand) {
KahaSubscriptionCommand kahaSubscriptionCommand = (KahaSubscriptionCommand)data;
if (kahaSubscriptionCommand.hasSubscriptionInfo()) {
// needs to be processed via activate and will be replayed on reconnect
LOG.debug("ignoring add sub command during recovery replay:" + data);
return;
}
}
process(data, location, (IndexAware) null);
} else {
// just recover producer audit
data.visit(new Visitor() {
@Override
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, final IndexAware onSequenceAssignedCallback) throws IOException {
data.visit(new Visitor() {
@Override
public void visit(KahaAddMessageCommand command) throws IOException {
process(command, location, onSequenceAssignedCallback);
}
@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, onSequenceAssignedCallback);
}
@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);
}
@Override
public void visit(KahaProducerAuditCommand command) throws IOException {
processLocation(location);
}
@Override
public void visit(KahaAckMessageFileMapCommand command) throws IOException {
processLocation(location);
}
@Override
public void visit(KahaTraceCommand command) {
processLocation(location);
}
@Override
public void visit(KahaUpdateMessageCommand command) throws IOException {
process(command, location);
}
});
}
@SuppressWarnings("rawtypes")
protected void process(final KahaAddMessageCommand command, final Location location, final IndexAware runWithIndexLock) throws IOException {
if (command.hasTransactionInfo()) {
List inflightTx = getInflightTx(command.getTransactionInfo());
inflightTx.add(new AddOperation(command, location, runWithIndexLock));
} else {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
long assignedIndex = updateIndex(tx, command, location);
if (runWithIndexLock != null) {
runWithIndexLock.sequenceAssignedWithIndexLocked(assignedIndex);
}
}
});
} finally {
this.indexLock.writeLock().unlock();
}
}
}
@SuppressWarnings("rawtypes")
protected void process(final KahaUpdateMessageCommand command, final Location location) throws IOException {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
updateIndex(tx, command, location);
}
});
} finally {
this.indexLock.writeLock().unlock();
}
}
@SuppressWarnings("rawtypes")
protected void process(final KahaRemoveMessageCommand command, final Location location) throws IOException {
if (command.hasTransactionInfo()) {
List inflightTx = getInflightTx(command.getTransactionInfo());
inflightTx.add(new RemoveOperation(command, location));
} else {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure() {
@Override
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() {
@Override
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() {
@Override
public void execute(Transaction tx) throws IOException {
updateIndex(tx, command, location);
}
});
} finally {
this.indexLock.writeLock().unlock();
}
}
protected void processLocation(final Location location) {
this.indexLock.writeLock().lock();
try {
metadata.lastUpdate = location;
} finally {
this.indexLock.writeLock().unlock();
}
}
@SuppressWarnings("rawtypes")
protected void process(KahaCommitCommand command, final Location location, final IndexAware before) throws IOException {
TransactionId key = TransactionIdConversion.convert(command.getTransactionInfo());
List inflightTx;
synchronized (inflightTransactions) {
inflightTx = inflightTransactions.remove(key);
if (inflightTx == null) {
inflightTx = preparedTransactions.remove(key);
}
}
if (inflightTx == null) {
// only non persistent messages in this tx
if (before != null) {
before.sequenceAssignedWithIndexLocked(-1);
}
return;
}
final List messagingTx = inflightTx;
indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
for (Operation op : messagingTx) {
op.execute(tx);
}
}
});
metadata.lastUpdate = location;
} finally {
indexLock.writeLock().unlock();
}
}
@SuppressWarnings("rawtypes")
protected void process(KahaPrepareCommand command, Location location) {
TransactionId key = TransactionIdConversion.convert(command.getTransactionInfo());
synchronized (inflightTransactions) {
List tx = inflightTransactions.remove(key);
if (tx != null) {
preparedTransactions.put(key, tx);
}
}
}
@SuppressWarnings("rawtypes")
protected void process(KahaRollbackCommand command, Location location) throws IOException {
TransactionId key = TransactionIdConversion.convert(command.getTransactionInfo());
List updates = null;
synchronized (inflightTransactions) {
updates = inflightTransactions.remove(key);
if (updates == null) {
updates = preparedTransactions.remove(key);
}
}
}
// /////////////////////////////////////////////////////////////////
// These methods do the actual index updates.
// /////////////////////////////////////////////////////////////////
protected final ReentrantReadWriteLock indexLock = new ReentrantReadWriteLock();
private final HashSet journalFilesBeingReplicated = new HashSet();
long updateIndex(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.subscriptions.isEmpty(tx)) {
return -1;
}
// 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));
if (sd.subscriptions != null && !sd.subscriptions.isEmpty(tx)) {
addAckLocationForNewMessage(tx, sd, id);
}
metadata.lastUpdate = location;
} else {
// If the message ID is indexed, then the broker asked us to store a duplicate before the message was dispatched and acked, we ignore this add attempt
LOG.warn("Duplicate message add attempt rejected. Destination: {}://{}, Message id: {}", command.getDestination().getType(), command.getDestination().getName(), command.getMessageId());
sd.messageIdIndex.put(tx, command.getMessageId(), previous);
sd.locationIndex.remove(tx, location);
id = -1;
}
} 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..
sd.locationIndex.put(tx, location, previous);
metadata.lastUpdate = location;
}
// record this id in any event, initial send or recovery
metadata.producerSequenceIdTracker.isDuplicate(command.getMessageId());
return id;
}
void trackPendingAdd(KahaDestination destination, Long seq) {
StoredDestination sd = storedDestinations.get(key(destination));
if (sd != null) {
sd.trackPendingAdd(seq);
}
}
void trackPendingAddComplete(KahaDestination destination, Long seq) {
StoredDestination sd = storedDestinations.get(key(destination));
if (sd != null) {
sd.trackPendingAddComplete(seq);
}
}
void updateIndex(Transaction tx, KahaUpdateMessageCommand updateMessageCommand, Location location) throws IOException {
KahaAddMessageCommand command = updateMessageCommand.getMessage();
StoredDestination sd = getStoredDestination(command.getDestination(), tx);
Long id = sd.messageIdIndex.get(tx, command.getMessageId());
if (id != null) {
MessageKeys previousKeys = sd.orderIndex.put(
tx,
command.getPrioritySupported() ? command.getPriority() : javax.jms.Message.DEFAULT_PRIORITY,
id,
new MessageKeys(command.getMessageId(), location)
);
sd.locationIndex.put(tx, location, id);
if(previousKeys != null) {
sd.locationIndex.remove(tx, previousKeys.location);
}
metadata.lastUpdate = location;
} else {
LOG.warn("Non existent message update attempt rejected. Destination: {}://{}, Message id: {}", command.getDestination().getType(), command.getDestination().getName(), 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);
metadata.lastUpdate = ackLocation;
} else if (LOG.isDebugEnabled()) {
LOG.debug("message not found in order index: " + sequenceId + " for: " + command.getMessageId());
}
} else if (LOG.isDebugEnabled()) {
LOG.debug("message not found in sequence id index: " + command.getMessageId());
}
} 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();
if (command.getAck() != UNMATCHED) {
sd.orderIndex.get(tx, sequence);
byte priority = sd.orderIndex.lastGetPriority();
sd.subscriptionAcks.put(tx, subscriptionKey, new LastAck(sequence, priority));
}
MessageKeys keys = sd.orderIndex.get(tx, sequence);
if (keys != null) {
recordAckMessageReferenceLocation(ackLocation, keys.location);
}
// The following method handles deleting un-referenced messages.
removeAckLocation(tx, sd, subscriptionKey, sequence);
metadata.lastUpdate = ackLocation;
} else if (LOG.isDebugEnabled()) {
LOG.debug("no message sequence exists for id: " + command.getMessageId() + " and sub: " + command.getSubscriptionKey());
}
}
}
private void recordAckMessageReferenceLocation(Location ackLocation, Location messageLocation) {
Set referenceFileIds = metadata.ackMessageFileMap.get(Integer.valueOf(ackLocation.getDataFileId()));
if (referenceFileIds == null) {
referenceFileIds = new HashSet();
referenceFileIds.add(messageLocation.getDataFileId());
metadata.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());
sd.ackPositions.clear(tx);
sd.ackPositions.unload(tx);
tx.free(sd.ackPositions.getHeadPageId());
sd.subLocations.clear(tx);
sd.subLocations.unload(tx);
tx.free(sd.subLocations.getHeadPageId());
}
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);
final String subscriptionKey = command.getSubscriptionKey();
// If set then we are creating it.. otherwise we are destroying the sub
if (command.hasSubscriptionInfo()) {
sd.subscriptions.put(tx, subscriptionKey, command);
sd.subLocations.put(tx, subscriptionKey, location);
long ackLocation=NOT_ACKED;
if (!command.getRetroactive()) {
ackLocation = sd.orderIndex.nextMessageId-1;
} else {
addAckLocationForRetroactiveSub(tx, sd, subscriptionKey);
}
sd.subscriptionAcks.put(tx, subscriptionKey, new LastAck(ackLocation));
sd.subscriptionCache.add(subscriptionKey);
} else {
// delete the sub...
sd.subscriptions.remove(tx, subscriptionKey);
sd.subLocations.remove(tx, subscriptionKey);
sd.subscriptionAcks.remove(tx, subscriptionKey);
sd.subscriptionCache.remove(subscriptionKey);
removeAckLocationsForSub(tx, sd, subscriptionKey);
if (sd.subscriptions.isEmpty(tx)) {
sd.messageIdIndex.clear(tx);
sd.locationIndex.clear(tx);
sd.orderIndex.clear(tx);
}
}
}
private void checkpointUpdate(final boolean cleanup) throws IOException {
checkpointLock.writeLock().lock();
try {
this.indexLock.writeLock().lock();
try {
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
checkpointUpdate(tx, cleanup);
}
});
} finally {
this.indexLock.writeLock().unlock();
}
} finally {
checkpointLock.writeLock().unlock();
}
}
/**
* @param tx
* @throws IOException
*/
void checkpointUpdate(Transaction tx, boolean cleanup) throws IOException {
LOG.debug("Checkpoint started.");
// reflect last update exclusive of current checkpoint
Location lastUpdate = metadata.lastUpdate;
metadata.state = OPEN_STATE;
metadata.producerSequenceIdTrackerLocation = checkpointProducerAudit();
metadata.ackMessageFileMapLocation = checkpointAckMessageFileMap();
Location[] inProgressTxRange = getInProgressTxLocationRange();
metadata.firstInProgressTransactionLocation = inProgressTxRange[0];
tx.store(metadata.page, metadataMarshaller, true);
pageFile.flush();
if( cleanup ) {
final TreeSet completeFileSet = new TreeSet(journal.getFileMap().keySet());
final TreeSet gcCandidateSet = new TreeSet(completeFileSet);
if (LOG.isTraceEnabled()) {
LOG.trace("Last update: " + lastUpdate + ", full gc candidates set: " + gcCandidateSet);
}
if (lastUpdate != null) {
gcCandidateSet.remove(lastUpdate.getDataFileId());
}
// Don't GC files under replication
if( journalFilesBeingReplicated!=null ) {
gcCandidateSet.removeAll(journalFilesBeingReplicated);
}
if (metadata.producerSequenceIdTrackerLocation != null) {
int dataFileId = metadata.producerSequenceIdTrackerLocation.getDataFileId();
if (gcCandidateSet.contains(dataFileId) && gcCandidateSet.first() == dataFileId) {
// rewrite so we don't prevent gc
metadata.producerSequenceIdTracker.setModified(true);
if (LOG.isTraceEnabled()) {
LOG.trace("rewriting producerSequenceIdTracker:" + metadata.producerSequenceIdTrackerLocation);
}
}
gcCandidateSet.remove(dataFileId);
if (LOG.isTraceEnabled()) {
LOG.trace("gc candidates after producerSequenceIdTrackerLocation:" + dataFileId + ", " + gcCandidateSet);
}
}
if (metadata.ackMessageFileMapLocation != null) {
int dataFileId = metadata.ackMessageFileMapLocation.getDataFileId();
gcCandidateSet.remove(dataFileId);
if (LOG.isTraceEnabled()) {
LOG.trace("gc candidates after ackMessageFileMapLocation:" + dataFileId + ", " + gcCandidateSet);
}
}
// Don't GC files referenced by in-progress tx
if (inProgressTxRange[0] != null) {
for (int pendingTx=inProgressTxRange[0].getDataFileId(); pendingTx <= inProgressTxRange[1].getDataFileId(); pendingTx++) {
gcCandidateSet.remove(pendingTx);
}
}
if (LOG.isTraceEnabled()) {
LOG.trace("gc candidates after tx range:" + Arrays.asList(inProgressTxRange) + ", " + gcCandidateSet);
}
// Go through all the destinations to see if any of them can remove GC candidates.
for (Entry entry : storedDestinations.entrySet()) {
if( gcCandidateSet.isEmpty() ) {
break;
}
// Use a visitor to cut down the number of pages that we load
entry.getValue().locationIndex.visit(tx, new BTreeVisitor() {
int last=-1;
@Override
public boolean isInterestedInKeysBetween(Location first, Location second) {
if( first==null ) {
SortedSet 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 subset = gcCandidateSet.tailSet(first.getDataFileId());
if( !subset.isEmpty() && subset.first() == first.getDataFileId() ) {
subset.remove(first.getDataFileId());
}
return !subset.isEmpty();
} else {
SortedSet 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();
}
}
@Override
public void visit(List keys, List values) {
for (Location l : keys) {
int fileId = l.getDataFileId();
if( last != fileId ) {
gcCandidateSet.remove(fileId);
last = fileId;
}
}
}
});
// Durable Subscription
if (entry.getValue().subLocations != null) {
Iterator> iter = entry.getValue().subLocations.iterator(tx);
while (iter.hasNext()) {
Entry subscription = iter.next();
int dataFileId = subscription.getValue().getDataFileId();
// Move subscription along if it has no outstanding messages that need ack'd
// and its in the last log file in the journal.
if (!gcCandidateSet.isEmpty() && gcCandidateSet.first() == dataFileId) {
final StoredDestination destination = entry.getValue();
final String subscriptionKey = subscription.getKey();
SequenceSet pendingAcks = destination.ackPositions.get(tx, subscriptionKey);
// When pending is size one that is the next message Id meaning there
// are no pending messages currently.
if (pendingAcks == null || pendingAcks.size() <= 1) {
if (LOG.isTraceEnabled()) {
LOG.trace("Found candidate for rewrite: {} from file {}", entry.getKey(), dataFileId);
}
final KahaSubscriptionCommand kahaSub =
destination.subscriptions.get(tx, subscriptionKey);
destination.subLocations.put(
tx, subscriptionKey, checkpointSubscriptionCommand(kahaSub));
// Skips the remove from candidates if we rewrote the subscription
// in order to prevent duplicate subscription commands on recover.
// If another subscription is on the same file and isn't rewritten
// than it will remove the file from the set.
continue;
}
}
gcCandidateSet.remove(dataFileId);
}
}
if (LOG.isTraceEnabled()) {
LOG.trace("gc candidates after dest:" + entry.getKey() + ", " + gcCandidateSet);
}
}
// check we are not deleting file with ack for in-use journal files
if (LOG.isTraceEnabled()) {
LOG.trace("gc candidates: " + gcCandidateSet);
}
Iterator candidates = gcCandidateSet.iterator();
while (candidates.hasNext()) {
Integer candidate = candidates.next();
Set referencedFileIds = metadata.ackMessageFileMap.get(candidate);
if (referencedFileIds != null) {
for (Integer referencedFileId : referencedFileIds) {
if (completeFileSet.contains(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)) {
metadata.ackMessageFileMap.remove(candidate);
} else {
if (LOG.isTraceEnabled()) {
LOG.trace("not removing data file: " + candidate
+ " as contained ack(s) refer to referenced file: " + referencedFileIds);
}
}
}
}
if (!gcCandidateSet.isEmpty()) {
if (LOG.isDebugEnabled()) {
LOG.debug("Cleanup removing the data files: " + gcCandidateSet);
}
journal.removeDataFiles(gcCandidateSet);
}
}
LOG.debug("Checkpoint done.");
}
final Runnable nullCompletionCallback = new Runnable() {
@Override
public void run() {
}
};
private Location checkpointProducerAudit() throws IOException {
if (metadata.producerSequenceIdTracker == null || metadata.producerSequenceIdTracker.modified()) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(baos);
oout.writeObject(metadata.producerSequenceIdTracker);
oout.flush();
oout.close();
// using completion callback allows a disk sync to be avoided when enableJournalDiskSyncs = false
Location location = store(new KahaProducerAuditCommand().setAudit(new Buffer(baos.toByteArray())), nullCompletionCallback);
try {
location.getLatch().await();
} catch (InterruptedException e) {
throw new InterruptedIOException(e.toString());
}
return location;
}
return metadata.producerSequenceIdTrackerLocation;
}
private Location checkpointAckMessageFileMap() throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(baos);
oout.writeObject(metadata.ackMessageFileMap);
oout.flush();
oout.close();
// using completion callback allows a disk sync to be avoided when enableJournalDiskSyncs = false
Location location = store(new KahaAckMessageFileMapCommand().setAckMessageFileMap(new Buffer(baos.toByteArray())), nullCompletionCallback);
try {
location.getLatch().await();
} catch (InterruptedException e) {
throw new InterruptedIOException(e.toString());
}
return location;
}
private Location checkpointSubscriptionCommand(KahaSubscriptionCommand subscription) throws IOException {
ByteSequence sequence = toByteSequence(subscription);
Location location = journal.write(sequence, nullCompletionCallback) ;
try {
location.getLatch().await();
} catch (InterruptedException e) {
throw new InterruptedIOException(e.toString());
}
return location;
}
public HashSet getJournalFilesBeingReplicated() {
return journalFilesBeingReplicated;
}
// /////////////////////////////////////////////////////////////////
// StoredDestination related implementation methods.
// /////////////////////////////////////////////////////////////////
protected final HashMap storedDestinations = new HashMap();
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 {
static final MessageKeysMarshaller INSTANCE = new MessageKeysMarshaller();
@Override
public MessageKeys readPayload(DataInput dataIn) throws IOException {
return new MessageKeys(dataIn.readUTF(), LocationMarshaller.INSTANCE.readPayload(dataIn));
}
@Override
public void writePayload(MessageKeys object, DataOutput dataOut) throws IOException {
dataOut.writeUTF(object.messageId);
LocationMarshaller.INSTANCE.writePayload(object.location, dataOut);
}
}
class LastAck {
long lastAckedSequence;
byte priority;
public LastAck(LastAck source) {
this.lastAckedSequence = source.lastAckedSequence;
this.priority = source.priority;
}
public LastAck() {
this.priority = MessageOrderIndex.HI;
}
public LastAck(long ackLocation) {
this.lastAckedSequence = ackLocation;
this.priority = MessageOrderIndex.LO;
}
public LastAck(long ackLocation, byte priority) {
this.lastAckedSequence = ackLocation;
this.priority = priority;
}
@Override
public String toString() {
return "[" + lastAckedSequence + ":" + priority + "]";
}
}
protected class LastAckMarshaller implements Marshaller {
@Override
public void writePayload(LastAck object, DataOutput dataOut) throws IOException {
dataOut.writeLong(object.lastAckedSequence);
dataOut.writeByte(object.priority);
}
@Override
public LastAck readPayload(DataInput dataIn) throws IOException {
LastAck lastAcked = new LastAck();
lastAcked.lastAckedSequence = dataIn.readLong();
if (metadata.version >= 3) {
lastAcked.priority = dataIn.readByte();
}
return lastAcked;
}
@Override
public int getFixedSize() {
return 9;
}
@Override
public LastAck deepCopy(LastAck source) {
return new LastAck(source);
}
@Override
public boolean isDeepCopySupported() {
return true;
}
}
class StoredDestination {
MessageOrderIndex orderIndex = new MessageOrderIndex();
BTreeIndex locationIndex;
BTreeIndex messageIdIndex;
// These bits are only set for Topics
BTreeIndex subscriptions;
BTreeIndex subscriptionAcks;
HashMap subscriptionCursors;
ListIndex ackPositions;
ListIndex subLocations;
// Transient data used to track which Messages are no longer needed.
final TreeMap messageReferences = new TreeMap();
final HashSet subscriptionCache = new LinkedHashSet();
public void trackPendingAdd(Long seq) {
orderIndex.trackPendingAdd(seq);
}
public void trackPendingAddComplete(Long seq) {
orderIndex.trackPendingAddComplete(seq);
}
@Override
public String toString() {
return "nextSeq:" + orderIndex.nextMessageId + ",lastRet:" + orderIndex.cursor + ",pending:" + orderIndex.pendingAdditions.size();
}
}
protected class StoredDestinationMarshaller extends VariableMarshaller {
@Override
public StoredDestination readPayload(final DataInput dataIn) throws IOException {
final StoredDestination value = new StoredDestination();
value.orderIndex.defaultPriorityIndex = new BTreeIndex(pageFile, dataIn.readLong());
value.locationIndex = new BTreeIndex(pageFile, dataIn.readLong());
value.messageIdIndex = new BTreeIndex(pageFile, dataIn.readLong());
if (dataIn.readBoolean()) {
value.subscriptions = new BTreeIndex(pageFile, dataIn.readLong());
value.subscriptionAcks = new BTreeIndex(pageFile, dataIn.readLong());
if (metadata.version >= 4) {
value.ackPositions = new ListIndex(pageFile, dataIn.readLong());
} else {
// upgrade
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
LinkedHashMap temp = new LinkedHashMap();
if (metadata.version >= 3) {
// migrate
BTreeIndex> oldAckPositions =
new BTreeIndex>(pageFile, dataIn.readLong());
oldAckPositions.setKeyMarshaller(LongMarshaller.INSTANCE);
oldAckPositions.setValueMarshaller(HashSetStringMarshaller.INSTANCE);
oldAckPositions.load(tx);
// Do the initial build of the data in memory before writing into the store
// based Ack Positions List to avoid a lot of disk thrashing.
Iterator>> iterator = oldAckPositions.iterator(tx);
while (iterator.hasNext()) {
Entry> entry = iterator.next();
for(String subKey : entry.getValue()) {
SequenceSet pendingAcks = temp.get(subKey);
if (pendingAcks == null) {
pendingAcks = new SequenceSet();
temp.put(subKey, pendingAcks);
}
pendingAcks.add(entry.getKey());
}
}
}
// Now move the pending messages to ack data into the store backed
// structure.
value.ackPositions = new ListIndex(pageFile, tx.allocate());
value.ackPositions.setKeyMarshaller(StringMarshaller.INSTANCE);
value.ackPositions.setValueMarshaller(SequenceSet.Marshaller.INSTANCE);
value.ackPositions.load(tx);
for(String subscriptionKey : temp.keySet()) {
value.ackPositions.put(tx, subscriptionKey, temp.get(subscriptionKey));
}
}
});
}
if (metadata.version >= 5) {
value.subLocations = new ListIndex(pageFile, dataIn.readLong());
} else {
// upgrade
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
value.subLocations = new ListIndex(pageFile, tx.allocate());
value.subLocations.setKeyMarshaller(StringMarshaller.INSTANCE);
value.subLocations.setValueMarshaller(LocationMarshaller.INSTANCE);
value.subLocations.load(tx);
}
});
}
}
if (metadata.version >= 2) {
value.orderIndex.lowPriorityIndex = new BTreeIndex(pageFile, dataIn.readLong());
value.orderIndex.highPriorityIndex = new BTreeIndex(pageFile, dataIn.readLong());
} else {
// upgrade
pageFile.tx().execute(new Transaction.Closure() {
@Override
public void execute(Transaction tx) throws IOException {
value.orderIndex.lowPriorityIndex = new BTreeIndex(pageFile, tx.allocate());
value.orderIndex.lowPriorityIndex.setKeyMarshaller(LongMarshaller.INSTANCE);
value.orderIndex.lowPriorityIndex.setValueMarshaller(MessageKeysMarshaller.INSTANCE);
value.orderIndex.lowPriorityIndex.load(tx);
value.orderIndex.highPriorityIndex = new BTreeIndex(pageFile, tx.allocate());
value.orderIndex.highPriorityIndex.setKeyMarshaller(LongMarshaller.INSTANCE);
value.orderIndex.highPriorityIndex.setValueMarshaller(MessageKeysMarshaller.INSTANCE);
value.orderIndex.highPriorityIndex.load(tx);
}
});
}
return value;
}
@Override
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());
dataOut.writeLong(value.ackPositions.getHeadPageId());
dataOut.writeLong(value.subLocations.getHeadPageId());
} else {
dataOut.writeBoolean(false);
}
dataOut.writeLong(value.orderIndex.lowPriorityIndex.getPageId());
dataOut.writeLong(value.orderIndex.highPriorityIndex.getPageId());
}
}
static class KahaSubscriptionCommandMarshaller extends VariableMarshaller {
final static KahaSubscriptionCommandMarshaller INSTANCE = new KahaSubscriptionCommandMarshaller();
@Override
public KahaSubscriptionCommand readPayload(DataInput dataIn) throws IOException {
KahaSubscriptionCommand rc = new KahaSubscriptionCommand();
rc.mergeFramed((InputStream)dataIn);
return rc;
}
@Override
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(pageFile, tx.allocate());
rc.messageIdIndex = new BTreeIndex(pageFile, tx.allocate());
if (topic) {
rc.subscriptions = new BTreeIndex(pageFile, tx.allocate());
rc.subscriptionAcks = new BTreeIndex(pageFile, tx.allocate());
rc.ackPositions = new ListIndex(pageFile, tx.allocate());
rc.subLocations = new ListIndex(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(org.apache.activemq.store.kahadb.disk.util.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(new LastAckMarshaller());
rc.subscriptionAcks.load(tx);
rc.ackPositions.setKeyMarshaller(StringMarshaller.INSTANCE);
rc.ackPositions.setValueMarshaller(SequenceSet.Marshaller.INSTANCE);
rc.ackPositions.load(tx);
rc.subLocations.setKeyMarshaller(StringMarshaller.INSTANCE);
rc.subLocations.setValueMarshaller(LocationMarshaller.INSTANCE);
rc.subLocations.load(tx);
rc.subscriptionCursors = new HashMap();
if (metadata.version < 3) {
// on upgrade need to fill ackLocation with available messages past last ack
for (Iterator> iterator = rc.subscriptionAcks.iterator(tx); iterator.hasNext(); ) {
Entry entry = iterator.next();
for (Iterator> orderIterator =
rc.orderIndex.iterator(tx, new MessageOrderCursor(entry.getValue().lastAckedSequence)); orderIterator.hasNext(); ) {
Long sequence = orderIterator.next().getKey();
addAckLocation(tx, rc, sequence, entry.getKey());
}
// modify so it is upgraded
rc.subscriptionAcks.put(tx, entry.getKey(), entry.getValue());
}
}
// Configure the message references index
Iterator> subscriptions = rc.ackPositions.iterator(tx);
while (subscriptions.hasNext()) {
Entry subscription = subscriptions.next();
SequenceSet pendingAcks = subscription.getValue();
if (pendingAcks != null && !pendingAcks.isEmpty()) {
Long lastPendingAck = pendingAcks.getTail().getLast();
for(Long sequenceId : pendingAcks) {
Long current = rc.messageReferences.get(sequenceId);
if (current == null) {
current = new Long(0);
}
// We always add a trailing empty entry for the next position to start from
// so we need to ensure we don't count that as a message reference on reload.
if (!sequenceId.equals(lastPendingAck)) {
current = current.longValue() + 1;
}
rc.messageReferences.put(sequenceId, current);
}
}
}
// Configure the subscription cache
for (Iterator> iterator = rc.subscriptionAcks.iterator(tx); iterator.hasNext(); ) {
Entry entry = iterator.next();
rc.subscriptionCache.add(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.subscriptionAcks.isEmpty(tx)) {
for (Iterator> iterator = rc.subscriptionAcks.iterator(tx); iterator.hasNext();) {
Entry entry = iterator.next();
rc.orderIndex.nextMessageId =
Math.max(rc.orderIndex.nextMessageId, entry.getValue().lastAckedSequence +1);
}
}
} else {
// update based on ackPositions for unmatched, last entry is always the next
if (!rc.messageReferences.isEmpty()) {
Long nextMessageId = (Long) rc.messageReferences.keySet().toArray()[rc.messageReferences.size() - 1];
rc.orderIndex.nextMessageId =
Math.max(rc.orderIndex.nextMessageId, nextMessageId);
}
}
}
if (metadata.version < VERSION) {
// store again after upgrade
metadata.destinations.put(tx, key, rc);
}
return rc;
}
private void addAckLocation(Transaction tx, StoredDestination sd, Long messageSequence, String subscriptionKey) throws IOException {
SequenceSet sequences = sd.ackPositions.get(tx, subscriptionKey);
if (sequences == null) {
sequences = new SequenceSet();
sequences.add(messageSequence);
sd.ackPositions.add(tx, subscriptionKey, sequences);
} else {
sequences.add(messageSequence);
sd.ackPositions.put(tx, subscriptionKey, sequences);
}
Long count = sd.messageReferences.get(messageSequence);
if (count == null) {
count = Long.valueOf(0L);
}
count = count.longValue() + 1;
sd.messageReferences.put(messageSequence, count);
}
// new sub is interested in potentially all existing messages
private void addAckLocationForRetroactiveSub(Transaction tx, StoredDestination sd, String subscriptionKey) throws IOException {
SequenceSet allOutstanding = new SequenceSet();
Iterator> iterator = sd.ackPositions.iterator(tx);
while (iterator.hasNext()) {
SequenceSet set = iterator.next().getValue();
for (Long entry : set) {
allOutstanding.add(entry);
}
}
sd.ackPositions.put(tx, subscriptionKey, allOutstanding);
for (Long ackPosition : allOutstanding) {
Long count = sd.messageReferences.get(ackPosition);
count = count.longValue() + 1;
sd.messageReferences.put(ackPosition, count);
}
}
// on a new message add, all existing subs are interested in this message
private void addAckLocationForNewMessage(Transaction tx, StoredDestination sd, Long messageSequence) throws IOException {
for(String subscriptionKey : sd.subscriptionCache) {
SequenceSet sequences = sd.ackPositions.get(tx, subscriptionKey);
if (sequences == null) {
sequences = new SequenceSet();
sequences.add(new Sequence(messageSequence, messageSequence + 1));
sd.ackPositions.add(tx, subscriptionKey, sequences);
} else {
sequences.add(new Sequence(messageSequence, messageSequence + 1));
sd.ackPositions.put(tx, subscriptionKey, sequences);
}
Long count = sd.messageReferences.get(messageSequence);
if (count == null) {
count = Long.valueOf(0L);
}
count = count.longValue() + 1;
sd.messageReferences.put(messageSequence, count);
sd.messageReferences.put(messageSequence+1, Long.valueOf(0L));
}
}
private void removeAckLocationsForSub(Transaction tx, StoredDestination sd, String subscriptionKey) throws IOException {
if (!sd.ackPositions.isEmpty(tx)) {
SequenceSet sequences = sd.ackPositions.remove(tx, subscriptionKey);
if (sequences == null || sequences.isEmpty()) {
return;
}
ArrayList unreferenced = new ArrayList();
for(Long sequenceId : sequences) {
Long references = sd.messageReferences.get(sequenceId);
if (references != null) {
references = references.longValue() - 1;
if (references.longValue() > 0) {
sd.messageReferences.put(sequenceId, references);
} else {
sd.messageReferences.remove(sequenceId);
unreferenced.add(sequenceId);
}
}
}
for(Long sequenceId : unreferenced) {
// Find all the entries that need to get deleted.
ArrayList> deletes = new ArrayList>();
sd.orderIndex.getDeleteList(tx, deletes, sequenceId);
// Do the actual deletes.
for (Entry entry : deletes) {
sd.locationIndex.remove(tx, entry.getValue().location);
sd.messageIdIndex.remove(tx, entry.getValue().messageId);
sd.orderIndex.remove(tx, entry.getKey());
}
}
}
}
/**
* @param tx
* @param sd
* @param subscriptionKey
* @param messageSequence
* @throws IOException
*/
private void removeAckLocation(Transaction tx, StoredDestination sd, String subscriptionKey, Long messageSequence) throws IOException {
// Remove the sub from the previous location set..
if (messageSequence != null) {
SequenceSet range = sd.ackPositions.get(tx, subscriptionKey);
if (range != null && !range.isEmpty()) {
range.remove(messageSequence);
if (!range.isEmpty()) {
sd.ackPositions.put(tx, subscriptionKey, range);
} else {
sd.ackPositions.remove(tx, subscriptionKey);
}
// Check if the message is reference by any other subscription.
Long count = sd.messageReferences.get(messageSequence);
if (count != null){
long references = count.longValue() - 1;
if (references > 0) {
sd.messageReferences.put(messageSequence, Long.valueOf(references));
return;
} else {
sd.messageReferences.remove(messageSequence);
}
}
// Find all the entries that need to get deleted.
ArrayList> deletes = new ArrayList>();
sd.orderIndex.getDeleteList(tx, deletes, messageSequence);
// Do the actual deletes.
for (Entry entry : deletes) {
sd.locationIndex.remove(tx, entry.getValue().location);
sd.messageIdIndex.remove(tx, entry.getValue().messageId);
sd.orderIndex.remove(tx, entry.getKey());
}
}
}
}
public LastAck getLastAck(Transaction tx, StoredDestination sd, String subscriptionKey) throws IOException {
return sd.subscriptionAcks.get(tx, subscriptionKey);
}
public long getStoredMessageCount(Transaction tx, StoredDestination sd, String subscriptionKey) throws IOException {
SequenceSet messageSequences = sd.ackPositions.get(tx, subscriptionKey);
if (messageSequences != null) {
long result = messageSequences.rangeSize();
// if there's anything in the range the last value is always the nextMessage marker, so remove 1.
return result > 0 ? result - 1 : 0;
}
return 0;
}
protected String key(KahaDestination destination) {
return destination.getType().getNumber() + ":" + destination.getName();
}
// /////////////////////////////////////////////////////////////////
// Transaction related implementation methods.
// /////////////////////////////////////////////////////////////////
@SuppressWarnings("rawtypes")
private final LinkedHashMap> inflightTransactions = new LinkedHashMap>();
@SuppressWarnings("rawtypes")
protected final LinkedHashMap> preparedTransactions = new LinkedHashMap>();
protected final Set ackedAndPrepared = new HashSet();
protected final Set rolledBackAcks = new HashSet();
// messages that have prepared (pending) acks cannot be re-dispatched unless the outcome is rollback,
// till then they are skipped by the store.
// 'at most once' XA guarantee
public void trackRecoveredAcks(ArrayList acks) {
this.indexLock.writeLock().lock();
try {
for (MessageAck ack : acks) {
ackedAndPrepared.add(ack.getLastMessageId().toProducerKey());
}
} finally {
this.indexLock.writeLock().unlock();
}
}
public void forgetRecoveredAcks(ArrayList acks, boolean rollback) throws IOException {
if (acks != null) {
this.indexLock.writeLock().lock();
try {
for (MessageAck ack : acks) {
final String id = ack.getLastMessageId().toProducerKey();
ackedAndPrepared.remove(id);
if (rollback) {
rolledBackAcks.add(id);
}
}
} finally {
this.indexLock.writeLock().unlock();
}
}
}
@SuppressWarnings("rawtypes")
private List getInflightTx(KahaTransactionInfo info) {
TransactionId key = TransactionIdConversion.convert(info);
List tx;
synchronized (inflightTransactions) {
tx = inflightTransactions.get(key);
if (tx == null) {
tx = Collections.synchronizedList(new ArrayList());
inflightTransactions.put(key, tx);
}
}
return tx;
}
@SuppressWarnings("unused")
private TransactionId key(KahaTransactionInfo transactionInfo) {
return TransactionIdConversion.convert(transactionInfo);
}
abstract class Operation > {
final T command;
final Location location;
public Operation(T command, Location location) {
this.command = command;
this.location = location;
}
public Location getLocation() {
return location;
}
public T getCommand() {
return command;
}
abstract public void execute(Transaction tx) throws IOException;
}
class AddOperation extends Operation {
final IndexAware runWithIndexLock;
public AddOperation(KahaAddMessageCommand command, Location location, IndexAware runWithIndexLock) {
super(command, location);
this.runWithIndexLock = runWithIndexLock;
}
@Override
public void execute(Transaction tx) throws IOException {
long seq = updateIndex(tx, command, location);
if (runWithIndexLock != null) {
runWithIndexLock.sequenceAssignedWithIndexLocked(seq);
}
}
}
class RemoveOperation extends Operation {
public RemoveOperation(KahaRemoveMessageCommand command, Location location) {
super(command, location);
}
@Override
public void execute(Transaction tx) throws IOException {
updateIndex(tx, command, location);
}
}
// /////////////////////////////////////////////////////////////////
// Initialization related implementation methods.
// /////////////////////////////////////////////////////////////////
private PageFile createPageFile() throws IOException {
if( indexDirectory == null ) {
indexDirectory = directory;
}
IOHelper.mkdirs(indexDirectory);
PageFile index = new PageFile(indexDirectory, "db");
index.setEnableWriteThread(isEnableIndexWriteAsync());
index.setWriteBatchSize(getIndexWriteBatchSize());
index.setPageCacheSize(indexCacheSize);
index.setUseLFRUEviction(isUseIndexLFRUEviction());
index.setLFUEvictionFactor(getIndexLFUEvictionFactor());
index.setEnableDiskSyncs(isEnableIndexDiskSyncs());
index.setEnableRecoveryFile(isEnableIndexRecoveryFile());
index.setEnablePageCaching(isEnableIndexPageCaching());
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(journalSize);
manager.setEnableAsyncDiskSync(isEnableJournalDiskSyncs());
if (getDirectoryArchive() != null) {
IOHelper.mkdirs(getDirectoryArchive());
manager.setDirectoryArchive(getDirectoryArchive());
}
return manager;
}
private Metadata createMetadata() {
Metadata md = new Metadata();
md.producerSequenceIdTracker.setAuditDepth(getFailoverProducersAuditDepth());
md.producerSequenceIdTracker.setMaximumNumberOfProducersToTrack(getMaxFailoverProducersToTrack());
return md;
}
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() throws IOException {
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;
}
@Override
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;
}
public boolean isArchiveCorruptedIndex() {
return archiveCorruptedIndex;
}
public void setArchiveCorruptedIndex(boolean archiveCorruptedIndex) {
this.archiveCorruptedIndex = archiveCorruptedIndex;
}
public float getIndexLFUEvictionFactor() {
return indexLFUEvictionFactor;
}
public void setIndexLFUEvictionFactor(float indexLFUEvictionFactor) {
this.indexLFUEvictionFactor = indexLFUEvictionFactor;
}
public boolean isUseIndexLFRUEviction() {
return useIndexLFRUEviction;
}
public void setUseIndexLFRUEviction(boolean useIndexLFRUEviction) {
this.useIndexLFRUEviction = useIndexLFRUEviction;
}
public void setEnableIndexDiskSyncs(boolean enableIndexDiskSyncs) {
this.enableIndexDiskSyncs = enableIndexDiskSyncs;
}
public void setEnableIndexRecoveryFile(boolean enableIndexRecoveryFile) {
this.enableIndexRecoveryFile = enableIndexRecoveryFile;
}
public void setEnableIndexPageCaching(boolean enableIndexPageCaching) {
this.enableIndexPageCaching = enableIndexPageCaching;
}
public boolean isEnableIndexDiskSyncs() {
return enableIndexDiskSyncs;
}
public boolean isEnableIndexRecoveryFile() {
return enableIndexRecoveryFile;
}
public boolean isEnableIndexPageCaching() {
return enableIndexPageCaching;
}
// /////////////////////////////////////////////////////////////////
// Internal conversion methods.
// /////////////////////////////////////////////////////////////////
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++;
}
}
@Override
public String toString() {
return "MessageOrderCursor:[def:" + defaultCursorPosition
+ ", low:" + lowPriorityCursorPosition
+ ", high:" + highPriorityCursorPosition + "]";
}
public void sync(MessageOrderCursor other) {
this.defaultCursorPosition=other.defaultCursorPosition;
this.lowPriorityCursorPosition=other.lowPriorityCursorPosition;
this.highPriorityCursorPosition=other.highPriorityCursorPosition;
}
}
class MessageOrderIndex {
static final byte HI = 9;
static final byte LO = 0;
static final byte DEF = 4;
long nextMessageId;
BTreeIndex defaultPriorityIndex;
BTreeIndex lowPriorityIndex;
BTreeIndex highPriorityIndex;
final MessageOrderCursor cursor = new MessageOrderCursor();
Long lastDefaultKey;
Long lastHighKey;
Long lastLowKey;
byte lastGetPriority;
final List pendingAdditions = new LinkedList();
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);
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(pageFile, tx.allocate());
if (metadata.version >= 2) {
lowPriorityIndex = new BTreeIndex(pageFile, tx.allocate());
highPriorityIndex = new BTreeIndex(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 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 lastEntry = defaultPriorityIndex.getLast(tx);
if (lastEntry != null) {
nextMessageId = lastEntry.getKey() + 1;
}
}
}
void clear(Transaction tx) throws IOException {
this.remove(tx);
this.resetCursorPosition();
this.allocate(tx);
this.load(tx);
this.configureLast(tx);
}
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 = sequence;
cursor.defaultCursorPosition = nextPosition.longValue();
} else if (highPriorityIndex != null && highPriorityIndex.containsKey(tx, sequence)) {
lastHighKey = sequence;
cursor.highPriorityCursorPosition = nextPosition.longValue();
} else if (lowPriorityIndex.containsKey(tx, sequence)) {
lastLowKey = sequence;
cursor.lowPriorityCursorPosition = nextPosition.longValue();
} else {
lastDefaultKey = sequence;
cursor.defaultCursorPosition = nextPosition.longValue();
}
}
}
void setBatch(Transaction tx, LastAck last) throws IOException {
setBatch(tx, last.lastAckedSequence);
if (cursor.defaultCursorPosition == 0
&& cursor.highPriorityCursorPosition == 0
&& cursor.lowPriorityCursorPosition == 0) {
long next = last.lastAckedSequence + 1;
switch (last.priority) {
case DEF:
cursor.defaultCursorPosition = next;
cursor.highPriorityCursorPosition = next;
break;
case HI:
cursor.highPriorityCursorPosition = next;
break;
case LO:
cursor.lowPriorityCursorPosition = next;
cursor.defaultCursorPosition = next;
cursor.highPriorityCursorPosition = next;
break;
}
}
}
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> deletes, Long sequenceId)
throws IOException {
if (defaultPriorityIndex.containsKey(tx, sequenceId)) {
getDeleteList(tx, deletes, defaultPriorityIndex, sequenceId);
} else if (highPriorityIndex != null && highPriorityIndex.containsKey(tx, sequenceId)) {
getDeleteList(tx, deletes, highPriorityIndex, sequenceId);
} else if (lowPriorityIndex != null && lowPriorityIndex.containsKey(tx, sequenceId)) {
getDeleteList(tx, deletes, lowPriorityIndex, sequenceId);
}
}
void getDeleteList(Transaction tx, ArrayList> deletes,
BTreeIndex index, Long sequenceId) throws IOException {
Iterator> iterator = index.iterator(tx, sequenceId, null);
deletes.add(iterator.next());
}
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);
lastGetPriority = LO;
} else {
lastGetPriority = HI;
}
} else {
lastGetPriority = DEF;
}
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> iterator(Transaction tx) throws IOException{
return new MessageOrderIterator(tx,cursor,this);
}
Iterator> iterator(Transaction tx, MessageOrderCursor m) throws IOException{
return new MessageOrderIterator(tx,m,this);
}
public byte lastGetPriority() {
return lastGetPriority;
}
public boolean alreadyDispatched(Long sequence) {
return (cursor.highPriorityCursorPosition > 0 && cursor.highPriorityCursorPosition >= sequence) ||
(cursor.defaultCursorPosition > 0 && cursor.defaultCursorPosition >= sequence) ||
(cursor.lowPriorityCursorPosition > 0 && cursor.lowPriorityCursorPosition >= sequence);
}
public void trackPendingAdd(Long seq) {
synchronized (pendingAdditions) {
pendingAdditions.add(seq);
}
}
public void trackPendingAddComplete(Long seq) {
synchronized (pendingAdditions) {
pendingAdditions.remove(seq);
}
}
public Long minPendingAdd() {
synchronized (pendingAdditions) {
if (!pendingAdditions.isEmpty()) {
return pendingAdditions.get(0);
} else {
return null;
}
}
}
class MessageOrderIterator implements Iterator>{
Iterator>currentIterator;
final Iterator>highIterator;
final Iterator>defaultIterator;
final Iterator>lowIterator;
MessageOrderIterator(Transaction tx, MessageOrderCursor m, MessageOrderIndex messageOrderIndex) throws IOException {
Long pendingAddLimiter = messageOrderIndex.minPendingAdd();
this.defaultIterator = defaultPriorityIndex.iterator(tx, m.defaultCursorPosition, pendingAddLimiter);
if (highPriorityIndex != null) {
this.highIterator = highPriorityIndex.iterator(tx, m.highPriorityCursorPosition, pendingAddLimiter);
} else {
this.highIterator = null;
}
if (lowPriorityIndex != null) {
this.lowIterator = lowPriorityIndex.iterator(tx, m.lowPriorityCursorPosition, pendingAddLimiter);
} else {
this.lowIterator = null;
}
}
@Override
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();
}
@Override
public Entry next() {
Entry 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;
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}
}
private static class HashSetStringMarshaller extends VariableMarshaller> {
final static HashSetStringMarshaller INSTANCE = new HashSetStringMarshaller();
@Override
public void writePayload(HashSet object, DataOutput dataOut) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(baos);
oout.writeObject(object);
oout.flush();
oout.close();
byte[] data = baos.toByteArray();
dataOut.writeInt(data.length);
dataOut.write(data);
}
@Override
@SuppressWarnings("unchecked")
public HashSet readPayload(DataInput dataIn) throws IOException {
int dataLen = dataIn.readInt();
byte[] data = new byte[dataLen];
dataIn.readFully(data);
ByteArrayInputStream bais = new ByteArrayInputStream(data);
ObjectInputStream oin = new ObjectInputStream(bais);
try {
return (HashSet) oin.readObject();
} catch (ClassNotFoundException cfe) {
IOException ioe = new IOException("Failed to read HashSet: " + cfe);
ioe.initCause(cfe);
throw ioe;
}
}
}
public File getIndexDirectory() {
return indexDirectory;
}
public void setIndexDirectory(File indexDirectory) {
this.indexDirectory = indexDirectory;
}
interface IndexAware {
public void sequenceAssignedWithIndexLocked(long index);
}
}