/**
* 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.broker.region.cursors;
import java.io.IOException;
import java.util.LinkedHashMap;
import org.apache.activemq.broker.region.MessageReference;
import org.apache.activemq.broker.region.Subscription;
import org.apache.activemq.broker.region.Topic;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.filter.MessageEvaluationContext;
import org.apache.activemq.filter.NonCachedMessageEvaluationContext;
import org.apache.activemq.store.TopicMessageStore;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* perist pendingCount messages pendingCount message (messages awaiting disptach
* to a consumer) cursor
*
* @version $Revision: 703975 $
*/
class TopicStorePrefetch extends AbstractStoreCursor {
private static final Log LOG = LogFactory.getLog(TopicStorePrefetch.class);
private TopicMessageStore store;
private final LinkedHashMap<MessageId,Message> batchList = new LinkedHashMap<MessageId,Message> ();
private String clientId;
private String subscriberName;
private Subscription subscription;
/**
* @param topic
* @param clientId
* @param subscriberName
*/
public TopicStorePrefetch(Subscription subscription,Topic topic, String clientId, String subscriberName) {
super(topic);
this.subscription=subscription;
this.store = (TopicMessageStore)topic.getMessageStore();
this.clientId = clientId;
this.subscriberName = subscriberName;
this.maxProducersToAudit=32;
this.maxAuditDepth=10000;
}
public boolean recoverMessageReference(MessageId messageReference) throws Exception {
// shouldn't get called
throw new RuntimeException("Not supported");
}
public synchronized boolean recoverMessage(Message message, boolean cached) throws Exception {
MessageEvaluationContext messageEvaluationContext = new NonCachedMessageEvaluationContext();
messageEvaluationContext.setMessageReference(message);
if (this.subscription.matches(message, messageEvaluationContext)) {
return super.recoverMessage(message, cached);
}
return false;
}
protected synchronized int getStoreSize() {
try {
return store.getMessageCount(clientId, subscriberName);
} catch (IOException e) {
LOG.error(this + " Failed to get the outstanding message count from the store", e);
throw new RuntimeException(e);
}
}
protected void resetBatch() {
this.store.resetBatching(clientId, subscriberName);
}
protected void doFillBatch() throws Exception {
this.store.recoverNextMessages(clientId, subscriberName,
maxBatchSize, this);
}
public String toString() {
return "TopicStorePrefetch" + System.identityHashCode(this) + "(" + clientId + "," + subscriberName + ")";
}
}