/*
* Copyright 2011 Red Hat, Inc. and/or its affiliates.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
package org.infinispan.nearcache.jms;
import org.infinispan.Cache;
import org.infinispan.CacheException;
import org.infinispan.marshall.StreamingMarshaller;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import javax.jms.BytesMessage;
import javax.jms.Message;
import javax.jms.MessageListener;
/**
* JMS listener that listens for remote cache events and invalidates cache
* contents.
*
* @author Galder ZamarreƱo
* @since 5.1
*/
public class RemoteEventListener implements MessageListener {
private static final Log log = LogFactory.getLog(RemoteEventListener.class);
final Cache<Object, Object> cache;
final StreamingMarshaller marshaller;
public RemoteEventListener(Cache<Object, Object> cache,
StreamingMarshaller marshaller) {
this.cache = cache;
this.marshaller = marshaller;
}
@Override
public void onMessage(Message msg) {
try {
// Remove the key from the cache
Object key = getKey(msg);
log.infof("Received invalidation message[%s] for key=%s, remove from cache",
msg.getJMSMessageID(), key);
cache.remove(key);
} catch (Exception e) {
throw new CacheException("Unable to process remote cache event", e);
}
}
private Object getKey(Message message) throws Exception {
BytesMessage msg = (BytesMessage) message;
// Transform a Hot Rod binary key into the local Java equivalent
byte[] keyBytes = new byte[(int) msg.getBodyLength()];
msg.readBytes(keyBytes);
// Since Hot Rod stores keys in byte[], it needs to be unmarshalled
return marshaller.objectFromByteBuffer(keyBytes);
}
}