/**
*
* Copyright 2004 Hiram Chirino
* Copyright 2004 Protique Ltd
*
* Licensed 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.activemq.store.journal;
import java.util.HashMap;
import java.util.Iterator;
import javax.jms.JMSException;
import org.activeio.journal.RecordLocation;
import org.activemq.message.ConsumerInfo;
import org.activemq.service.MessageContainer;
import org.activemq.service.MessageIdentity;
import org.activemq.service.SubscriberEntry;
import org.activemq.store.RecoveryListener;
import org.activemq.store.TopicMessageStore;
import org.activemq.util.Callback;
/**
* A MessageStore that uses a Journal to store it's messages.
*
* @version $Revision: 1.1 $
*/
public class JournalTopicMessageStore extends JournalMessageStore implements TopicMessageStore {
private MessageContainer messageContainer;
private TopicMessageStore longTermStore;
private HashMap ackedLastAckLocations = new HashMap();
private RecordLocation nextMark;
public JournalTopicMessageStore(JournalPersistenceAdapter adapter, TopicMessageStore checkpointStore, String destinationName) {
super(adapter, checkpointStore, destinationName);
this.longTermStore = checkpointStore;
}
public void recoverSubscription(String subscriptionId, MessageIdentity lastDispatchedMessage, RecoveryListener listener) throws JMSException {
longTermStore.recoverSubscription(subscriptionId, lastDispatchedMessage, listener);
}
public SubscriberEntry getSubscriberEntry(ConsumerInfo info) throws JMSException {
return longTermStore.getSubscriberEntry(info);
}
public void setSubscriberEntry(ConsumerInfo info, SubscriberEntry subscriberEntry) throws JMSException {
longTermStore.setSubscriberEntry(info, subscriberEntry);
}
public MessageIdentity getLastestMessageIdentity() throws JMSException {
return longTermStore.getLastestMessageIdentity();
}
public void incrementMessageCount(MessageIdentity messageId) throws JMSException {
longTermStore.incrementMessageCount(messageId);
}
public void decrementMessageCountAndMaybeDelete(MessageIdentity messageId) throws JMSException {
longTermStore.decrementMessageCountAndMaybeDelete(messageId);
}
/**
*/
public void setLastAcknowledgedMessageIdentity(String subscription, MessageIdentity messageIdentity) throws JMSException {
RecordLocation location = peristenceAdapter.writePacket(destinationName, subscription, messageIdentity, false);
synchronized(this) {
nextMark = location;
ackedLastAckLocations.put(subscription,messageIdentity);
}
}
public RecordLocation checkpoint() throws JMSException {
RecordLocation rc = super.checkpoint();
final HashMap cpAckedLastAckLocations;
// swap out the hashmaps..
synchronized(this) {
if( rc==null || (this.nextMark!=null && rc.compareTo(this.nextMark)<0) ) {
rc = this.nextMark;
}
cpAckedLastAckLocations = this.ackedLastAckLocations;
this.nextMark=null;
this.ackedLastAckLocations = new HashMap();
}
transactionTemplate.run(new Callback() {
public void execute() throws Throwable {
// Checkpoint the acked messages.
Iterator iterator = cpAckedLastAckLocations.keySet().iterator();
while (iterator.hasNext()) {
String subscription = (String) iterator.next();
MessageIdentity identity = (MessageIdentity) cpAckedLastAckLocations.get(subscription);
longTermStore.setLastAcknowledgedMessageIdentity(subscription, identity);
}
}
});
return rc;
}
/**
* @return Returns the longTermStore.
*/
public TopicMessageStore getLongTermTopicMessageStore() {
return longTermStore;
}
public void deleteSubscription(String subscription) throws JMSException {
longTermStore.deleteSubscription(subscription);
}
}