/*
*
* 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.
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*/
package org.apache.qpid.server.virtualhost;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;
import java.util.UUID;
import org.apache.log4j.Logger;
import org.apache.qpid.server.logging.EventLogger;
import org.apache.qpid.server.logging.messages.TransactionLogMessages;
import org.apache.qpid.server.logging.subjects.MessageStoreLogSubject;
import org.apache.qpid.server.message.EnqueueableMessage;
import org.apache.qpid.server.message.MessageReference;
import org.apache.qpid.server.message.ServerMessage;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.queue.QueueEntry;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.store.MessageStoreRecoveryHandler;
import org.apache.qpid.server.store.StoredMessage;
import org.apache.qpid.server.store.Transaction;
import org.apache.qpid.server.store.TransactionLogRecoveryHandler;
import org.apache.qpid.server.store.TransactionLogResource;
import org.apache.qpid.server.txn.DtxBranch;
import org.apache.qpid.server.txn.DtxRegistry;
import org.apache.qpid.server.txn.ServerTransaction;
import org.apache.qpid.transport.Xid;
import org.apache.qpid.transport.util.Functions;
public class VirtualHostConfigRecoveryHandler implements
MessageStoreRecoveryHandler,
MessageStoreRecoveryHandler.StoredMessageRecoveryHandler,
TransactionLogRecoveryHandler,
TransactionLogRecoveryHandler.QueueEntryRecoveryHandler,
TransactionLogRecoveryHandler.DtxRecordRecoveryHandler
{
private static final Logger _logger = Logger.getLogger(VirtualHostConfigRecoveryHandler.class);
private final VirtualHost _virtualHost;
private final Map<String, Integer> _queueRecoveries = new TreeMap<String, Integer>();
private final Map<Long, ServerMessage> _recoveredMessages = new HashMap<Long, ServerMessage>();
private final Map<Long, StoredMessage> _unusedMessages = new HashMap<Long, StoredMessage>();
private final EventLogger _eventLogger;
private MessageStoreLogSubject _logSubject;
private MessageStore _store;
public VirtualHostConfigRecoveryHandler(VirtualHost virtualHost)
{
_virtualHost = virtualHost;
_eventLogger = virtualHost.getEventLogger();
}
public VirtualHostConfigRecoveryHandler begin(MessageStore store)
{
_logSubject = new MessageStoreLogSubject(_virtualHost.getName(), store.getClass().getSimpleName());
_store = store;
_eventLogger.message(_logSubject, TransactionLogMessages.RECOVERY_START(null, false));
return this;
}
public StoredMessageRecoveryHandler begin()
{
return this;
}
public void message(StoredMessage message)
{
ServerMessage serverMessage = message.getMetaData().getType().createMessage(message);
_recoveredMessages.put(message.getMessageNumber(), serverMessage);
_unusedMessages.put(message.getMessageNumber(), message);
}
public void completeMessageRecovery()
{
}
public void dtxRecord(long format, byte[] globalId, byte[] branchId,
Transaction.Record[] enqueues,
Transaction.Record[] dequeues)
{
Xid id = new Xid(format, globalId, branchId);
DtxRegistry dtxRegistry = _virtualHost.getDtxRegistry();
DtxBranch branch = dtxRegistry.getBranch(id);
if(branch == null)
{
branch = new DtxBranch(id, _store, _virtualHost);
dtxRegistry.registerBranch(branch);
}
for(Transaction.Record record : enqueues)
{
final AMQQueue queue = _virtualHost.getQueue(record.getResource().getId());
if(queue != null)
{
final long messageId = record.getMessage().getMessageNumber();
final ServerMessage message = _recoveredMessages.get(messageId);
_unusedMessages.remove(messageId);
if(message != null)
{
final MessageReference ref = message.newReference();
branch.enqueue(queue,message);
branch.addPostTransactionAction(new ServerTransaction.Action()
{
public void postCommit()
{
queue.enqueue(message, null);
ref.release();
}
public void onRollback()
{
ref.release();
}
});
}
else
{
StringBuilder xidString = xidAsString(id);
_eventLogger.message(_logSubject,
TransactionLogMessages.XA_INCOMPLETE_MESSAGE(xidString.toString(),
Long.toString(messageId)));
}
}
else
{
StringBuilder xidString = xidAsString(id);
_eventLogger.message(_logSubject,
TransactionLogMessages.XA_INCOMPLETE_QUEUE(xidString.toString(),
record.getResource().getId().toString()));
}
}
for(Transaction.Record record : dequeues)
{
final AMQQueue queue = _virtualHost.getQueue(record.getResource().getId());
if(queue != null)
{
final long messageId = record.getMessage().getMessageNumber();
final ServerMessage message = _recoveredMessages.get(messageId);
_unusedMessages.remove(messageId);
if(message != null)
{
final QueueEntry entry = queue.getMessageOnTheQueue(messageId);
entry.acquire();
branch.dequeue(queue, message);
branch.addPostTransactionAction(new ServerTransaction.Action()
{
public void postCommit()
{
entry.delete();
}
public void onRollback()
{
entry.release();
}
});
}
else
{
StringBuilder xidString = xidAsString(id);
_eventLogger.message(_logSubject,
TransactionLogMessages.XA_INCOMPLETE_MESSAGE(xidString.toString(),
Long.toString(messageId)));
}
}
else
{
StringBuilder xidString = xidAsString(id);
_eventLogger.message(_logSubject,
TransactionLogMessages.XA_INCOMPLETE_QUEUE(xidString.toString(),
record.getResource().getId().toString()));
}
}
branch.setState(DtxBranch.State.PREPARED);
branch.prePrepareTransaction();
}
private static StringBuilder xidAsString(Xid id)
{
return new StringBuilder("(")
.append(id.getFormat())
.append(',')
.append(Functions.str(id.getGlobalId()))
.append(',')
.append(Functions.str(id.getBranchId()))
.append(')');
}
public void completeDtxRecordRecovery()
{
for(StoredMessage m : _unusedMessages.values())
{
_logger.warn("Message id " + m.getMessageNumber() + " in store, but not in any queue - removing....");
m.remove();
}
_eventLogger.message(_logSubject, TransactionLogMessages.RECOVERY_COMPLETE(null, false));
}
public void complete()
{
}
public void queueEntry(final UUID queueId, long messageId)
{
AMQQueue queue = _virtualHost.getQueue(queueId);
if(queue != null)
{
String queueName = queue.getName();
ServerMessage message = _recoveredMessages.get(messageId);
_unusedMessages.remove(messageId);
if(message != null)
{
if (_logger.isDebugEnabled())
{
_logger.debug("On recovery, delivering " + message.getMessageNumber() + " to " + queueName);
}
Integer count = _queueRecoveries.get(queueName);
if (count == null)
{
count = 0;
}
queue.enqueue(message,null);
_queueRecoveries.put(queueName, ++count);
}
else
{
_logger.warn("Message id " + messageId + " referenced in log as enqueued in queue " + queueName + " is unknown, entry will be discarded");
Transaction txn = _store.newTransaction();
txn.dequeueMessage(queue, new DummyMessage(messageId));
txn.commitTranAsync();
}
}
else
{
_logger.warn("Message id " + messageId + " in log references queue with id " + queueId + " which is not in the configuration, entry will be discarded");
Transaction txn = _store.newTransaction();
TransactionLogResource mockQueue =
new TransactionLogResource()
{
@Override
public String getName()
{
return "<<UNKNOWN>>";
}
@Override
public UUID getId()
{
return queueId;
}
@Override
public boolean isDurable()
{
return false;
}
};
txn.dequeueMessage(mockQueue, new DummyMessage(messageId));
txn.commitTranAsync();
}
}
public DtxRecordRecoveryHandler completeQueueEntryRecovery()
{
for(Map.Entry<String,Integer> entry : _queueRecoveries.entrySet())
{
_eventLogger.message(_logSubject, TransactionLogMessages.RECOVERED(entry.getValue(), entry.getKey()));
_eventLogger.message(_logSubject, TransactionLogMessages.RECOVERY_COMPLETE(entry.getKey(), true));
}
return this;
}
private static class DummyMessage implements EnqueueableMessage
{
private final long _messageId;
public DummyMessage(long messageId)
{
_messageId = messageId;
}
public long getMessageNumber()
{
return _messageId;
}
public boolean isPersistent()
{
return true;
}
public StoredMessage getStoredMessage()
{
return null;
}
}
}