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/**
 * 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;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Topic;
import javax.jms.TopicPublisher;

import org.apache.activemq.command.ActiveMQDestination;

/**
 * A client uses a TopicPublisher object to publish messages on
 * a topic. A TopicPublisher object is the publish-subscribe
 * form of a message producer.
 * 

*

* Normally, the Topic is specified when a TopicPublisher * is created. In this case, an attempt to use the publish * methods for an unidentified TopicPublisher will throw * a java.lang.UnsupportedOperationException. *

*

* If the TopicPublisher is created with an unidentified * Topic, an attempt to use the publish methods that * assume that the Topic has been identified will throw a * java.lang.UnsupportedOperationException. *

*

* During the execution of its publish method, a message must * not be changed by other threads within the client. If the message is * modified, the result of the publish is undefined. *

*

* After publishing a message, a client may retain and modify it without * affecting the message that has been published. The same message object may * be published multiple times. *

*

* The following message headers are set as part of publishing a message: * JMSDestination,JMSDeliveryMode,JMSExpiration, * JMSPriority,JMSMessageID and JMSTimeStamp. * When the message is published, the values of these headers are ignored. * After completion of the publish, the headers hold the values * specified by the method publishing the message. It is possible for the * publish method not to set JMSMessageID and * JMSTimeStamp if the setting of these headers is explicitly * disabled by the MessageProducer.setDisableMessageID or MessageProducer.setDisableMessageTimestamp * method. *

*

* Creating a MessageProducer provides the same features as * creating a TopicPublisher. A MessageProducer * object is recommended when creating new code. The TopicPublisher * is provided to support existing code. *

*

*

* Because TopicPublisher inherits from MessageProducer * , it inherits the send methods that are a part of the * MessageProducer interface. Using the send * methods will have the same effect as using the publish * methods: they are functionally the same. * * @see Session#createProducer(Destination) * @see TopicSession#createPublisher(Topic) */ public class ActiveMQTopicPublisher extends ActiveMQMessageProducer implements TopicPublisher { protected ActiveMQTopicPublisher(ActiveMQSession session, ActiveMQDestination destination, int sendTimeout) throws JMSException { super(session, session.getNextProducerId(), destination,sendTimeout); } /** * Gets the topic associated with this TopicPublisher. * * @return this publisher's topic * @throws JMSException if the JMS provider fails to get the topic for this * TopicPublisher due to some internal error. */ public Topic getTopic() throws JMSException { return (Topic) super.getDestination(); } /** * Publishes a message to the topic. Uses the TopicPublisher's * default delivery mode, priority, and time to live. * * @param message the message to publish * @throws JMSException if the JMS provider fails to publish the message due to * some internal error. * @throws MessageFormatException if an invalid message is specified. * @throws InvalidDestinationException if a client uses this method with a TopicPublisher * with an invalid topic. * @throws java.lang.UnsupportedOperationException * if a client uses this method with a TopicPublisher * that did not specify a topic at creation time. * @see javax.jms.MessageProducer#getDeliveryMode() * @see javax.jms.MessageProducer#getTimeToLive() * @see javax.jms.MessageProducer#getPriority() */ public void publish(Message message) throws JMSException { super.send(message); } /** * Publishes a message to the topic, specifying delivery mode, priority, * and time to live. * * @param message the message to publish * @param deliveryMode the delivery mode to use * @param priority the priority for this message * @param timeToLive the message's lifetime (in milliseconds) * @throws JMSException if the JMS provider fails to publish the message due to * some internal error. * @throws MessageFormatException if an invalid message is specified. * @throws InvalidDestinationException if a client uses this method with a TopicPublisher * with an invalid topic. * @throws java.lang.UnsupportedOperationException * if a client uses this method with a TopicPublisher * that did not specify a topic at creation time. */ public void publish(Message message, int deliveryMode, int priority, long timeToLive) throws JMSException { super.send(message, deliveryMode, priority, timeToLive); } /** * Publishes a message to a topic for an unidentified message producer. * Uses the TopicPublisher's default delivery mode, * priority, and time to live. *

*

* Typically, a message producer is assigned a topic at creation time; * however, the JMS API also supports unidentified message producers, which * require that the topic be supplied every time a message is published. * * @param topic the topic to publish this message to * @param message the message to publish * @throws JMSException if the JMS provider fails to publish the message due to * some internal error. * @throws MessageFormatException if an invalid message is specified. * @throws InvalidDestinationException if a client uses this method with an invalid topic. * @see javax.jms.MessageProducer#getDeliveryMode() * @see javax.jms.MessageProducer#getTimeToLive() * @see javax.jms.MessageProducer#getPriority() */ public void publish(Topic topic, Message message) throws JMSException { super.send(topic, message); } /** * Publishes a message to a topic for an unidentified message producer, * specifying delivery mode, priority and time to live. *

*

* Typically, a message producer is assigned a topic at creation time; * however, the JMS API also supports unidentified message producers, which * require that the topic be supplied every time a message is published. * * @param topic the topic to publish this message to * @param message the message to publish * @param deliveryMode the delivery mode to use * @param priority the priority for this message * @param timeToLive the message's lifetime (in milliseconds) * @throws JMSException if the JMS provider fails to publish the message due to * some internal error. * @throws MessageFormatException if an invalid message is specified. * @throws InvalidDestinationException if a client uses this method with an invalid topic. */ public void publish(Topic topic, Message message, int deliveryMode, int priority, long timeToLive) throws JMSException { super.send(topic, message, deliveryMode, priority, timeToLive); } }





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