fish.payara.persistence.eclipselink.cache.coordination.HazelcastTopic Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2016-2018 Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/main/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package fish.payara.persistence.eclipselink.cache.coordination;
import fish.payara.nucleus.eventbus.MessageReceiver;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.ConcurrentSkipListSet;
/**
* Representation of the Hazelcast topic to allow for proxying.
*
* @author Sven Diedrichsen
*/
final class HazelcastTopic {
/**
* The topic name to use.
*/
private final String name;
/**
* The message listener id to unregister with.
*/
private final String messageListenerId;
/**
* Stores the Ids of the messages published by this topic.
*/
private final Set publishedMessageIds = new ConcurrentSkipListSet<>();
/**
* Ctor.
* @param name The name of the topic.
*/
HazelcastTopic(String name, MessageReceiver receiver) {
this.name = name;
this.messageListenerId = getStorage().registerMessageReceiver(name, receiver);
}
/**
* Publishes the command.
* @param payload The {@link HazelcastPayload} to publish.
*/
void publish(HazelcastPayload payload) {
publishedMessageIds.add(payload.getId());
getStorage().publish(name, payload);
}
/**
* Checks if the provided payload has been published by this topic.
* @param payload The payload to check if it has been published with this topic.
* @return True if it has been published.
*/
boolean hasPublished(HazelcastPayload payload) {
return publishedMessageIds.remove(payload.getId());
}
/**
* Destroys the referenced topic.
*/
void destroy() {
publishedMessageIds.clear();
getStorage().removeMessageReceiver(messageListenerId);
}
/**
* @return The hz topic storage.
*/
private HazelcastTopicStorage getStorage() {
return HazelcastTopicStorage.getInstance();
}
}