diff options
Diffstat (limited to 'java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMapImpl.java')
-rw-r--r-- | java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMapImpl.java | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMapImpl.java b/java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMapImpl.java new file mode 100644 index 0000000000..c567387662 --- /dev/null +++ b/java/broker/src/main/java/org/apache/qpid/server/ack/UnacknowledgedMessageMapImpl.java @@ -0,0 +1,232 @@ +/* + * + * 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.qpid.server.ack; + +import org.apache.qpid.server.store.StoreContext; +import java.util.Collection; +import java.util.Iterator; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import org.apache.qpid.AMQException; +import org.apache.qpid.framing.AMQShortString; +import org.apache.qpid.server.protocol.AMQProtocolSession; +import org.apache.qpid.server.queue.AMQMessage; +import org.apache.qpid.server.queue.QueueEntry; +import org.apache.qpid.server.txn.TransactionalContext; + +public class UnacknowledgedMessageMapImpl implements UnacknowledgedMessageMap +{ + private final Object _lock = new Object(); + + private long _unackedSize; + + private Map<Long, QueueEntry> _map; + + private long _lastDeliveryTag; + + private final int _prefetchLimit; + + public UnacknowledgedMessageMapImpl(int prefetchLimit) + { + _prefetchLimit = prefetchLimit; + _map = new LinkedHashMap<Long, QueueEntry>(prefetchLimit); + } + + public void collect(long deliveryTag, boolean multiple, Map<Long, QueueEntry> msgs) + { + if (multiple) + { + collect(deliveryTag, msgs); + } + else + { + msgs.put(deliveryTag, get(deliveryTag)); + } + + } + + public boolean contains(long deliveryTag) throws AMQException + { + synchronized (_lock) + { + return _map.containsKey(deliveryTag); + } + } + + public void remove(Map<Long,QueueEntry> msgs) + { + synchronized (_lock) + { + for (Long deliveryTag : msgs.keySet()) + { + remove(deliveryTag); + } + } + } + + public QueueEntry remove(long deliveryTag) + { + synchronized (_lock) + { + + QueueEntry message = _map.remove(deliveryTag); + if(message != null) + { + _unackedSize -= message.getMessage().getSize(); + + } + + return message; + } + } + + public void visit(Visitor visitor) throws AMQException + { + synchronized (_lock) + { + Set<Map.Entry<Long, QueueEntry>> currentEntries = _map.entrySet(); + for (Map.Entry<Long, QueueEntry> entry : currentEntries) + { + visitor.callback(entry.getKey().longValue(), entry.getValue()); + } + visitor.visitComplete(); + } + } + + public void add(long deliveryTag, QueueEntry message) + { + synchronized (_lock) + { + _map.put(deliveryTag, message); + _unackedSize += message.getMessage().getSize(); + _lastDeliveryTag = deliveryTag; + } + } + + public Collection<QueueEntry> cancelAllMessages() + { + synchronized (_lock) + { + Collection<QueueEntry> currentEntries = _map.values(); + _map = new LinkedHashMap<Long, QueueEntry>(_prefetchLimit); + _unackedSize = 0l; + return currentEntries; + } + } + + public void acknowledgeMessage(long deliveryTag, boolean multiple, TransactionalContext txnContext) + throws AMQException + { + synchronized (_lock) + { + txnContext.acknowledgeMessage(deliveryTag, _lastDeliveryTag, multiple, this); + } + } + + public int size() + { + synchronized (_lock) + { + return _map.size(); + } + } + + public void clear() + { + synchronized (_lock) + { + _map.clear(); + _unackedSize = 0l; + } + } + + public void drainTo(long deliveryTag, StoreContext storeContext) throws AMQException + + { + synchronized (_lock) + { + Iterator<Map.Entry<Long, QueueEntry>> it = _map.entrySet().iterator(); + while (it.hasNext()) + { + Map.Entry<Long, QueueEntry> unacked = it.next(); + + if (unacked.getKey() > deliveryTag) + { + //This should not occur now. + throw new AMQException("UnacknowledgedMessageMap is out of order:" + unacked.getKey() + + " When deliveryTag is:" + deliveryTag + "ES:" + _map.entrySet().toString()); + } + + //Message has been ack so discard it. This will dequeue and decrement the reference. + unacked.getValue().discard(storeContext); + + it.remove(); + + _unackedSize -= unacked.getValue().getMessage().getSize(); + + + if (unacked.getKey() == deliveryTag) + { + break; + } + } + } + } + + public QueueEntry get(long key) + { + synchronized (_lock) + { + return _map.get(key); + } + } + + public Set<Long> getDeliveryTags() + { + synchronized (_lock) + { + return _map.keySet(); + } + } + + private void collect(long key, Map<Long, QueueEntry> msgs) + { + synchronized (_lock) + { + for (Map.Entry<Long, QueueEntry> entry : _map.entrySet()) + { + msgs.put(entry.getKey(),entry.getValue()); + if (entry.getKey() == key) + { + break; + } + } + } + } + + public long getUnacknowledgeBytes() + { + return _unackedSize; + } +} |