org.apache.openjpa.event.SingleJVMRemoteCommitProvider Maven / Gradle / Ivy
/*
* 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.openjpa.event;
import java.util.Iterator;
import java.util.Set;
import org.apache.openjpa.lib.util.concurrent.ConcurrentReferenceHashSet;
/**
* Single-JVM-only implementation of {@link RemoteCommitProvider}
* that listens for object modifications and propagates those changes
* to other SingleJVMRemoteCommitProviders in the same JVM. This is
* only useful for linking together multiple factories in the same
* JVM that are all loaded in the same classloader, which is a rare
* circumstance.
*
* @author Patrick Linskey
* @since 0.2.5.0
*/
public class SingleJVMRemoteCommitProvider
extends AbstractRemoteCommitProvider {
private static Set s_providers = new ConcurrentReferenceHashSet(
ConcurrentReferenceHashSet.HARD);
public SingleJVMRemoteCommitProvider() {
s_providers.add(this);
}
public void broadcast(RemoteCommitEvent event) {
SingleJVMRemoteCommitProvider provider;
for (Iterator iter = s_providers.iterator(); iter.hasNext();) {
provider = (SingleJVMRemoteCommitProvider) iter.next();
// don't notify this object -- this provider's factory
// should not be notified of commits that originated
// with one of its brokers
if (provider == this)
continue;
provider.fireEvent(event);
}
}
public void close() {
s_providers.remove(this);
}
}