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package javax.jms;

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

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

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

During the execution of its {@code publish} method, * a message must not be changed by other threads within the client. * If the message is modified, the result of the {@code 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: {@code JMSDestination}, {@code JMSDeliveryMode}, * {@code JMSExpiration}, {@code JMSPriority}, * {@code JMSMessageID} and {@code JMSTimeStamp}. * When the message is published, the values of these headers are ignored. * After completion of the {@code publish}, the headers hold the values * specified by the method publishing the message. It is possible for the * {@code publish} method not to set {@code JMSMessageID} and * {@code JMSTimeStamp} if the * setting of these headers is explicitly disabled by the * {@code MessageProducer.setDisableMessageID} or * {@code MessageProducer.setDisableMessageTimestamp} method. * *

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

Because {@code TopicPublisher} inherits from * {@code MessageProducer}, it inherits the * {@code send} methods that are a part of the {@code MessageProducer} * interface. Using the {@code send} methods will have the same * effect as using the * {@code publish} methods: they are functionally the same. * * * @version 1.1 February 2, 2002 * @author Mark Hapner * @author Rich Burridge * @author Kate Stout * * @see Session#createProducer(Destination) * @see TopicSession#createPublisher(Topic) */ public interface TopicPublisher extends MessageProducer { /** Gets the topic associated with this {@code TopicPublisher}. * * @return this publisher's topic * * @exception JMSException if the JMS provider fails to get the topic for * this {@code TopicPublisher} * due to some internal error. */ Topic getTopic() throws JMSException; /** Publishes a message to the topic. * Uses the {@code TopicPublisher}'s default delivery mode, priority, * and time to live. * * @param message the message to publish * * @exception JMSException if the JMS provider fails to publish the message * due to some internal error. * @exception MessageFormatException if an invalid message is specified. * @exception InvalidDestinationException if a client uses this method * with a {@code TopicPublisher} with * an invalid topic. * @exception java.lang.UnsupportedOperationException if a client uses this * method with a {@code 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() */ void publish(Message message) throws JMSException; /** 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) * * @exception JMSException if the JMS provider fails to publish the message * due to some internal error. * @exception MessageFormatException if an invalid message is specified. * @exception InvalidDestinationException if a client uses this method * with a {@code TopicPublisher} with * an invalid topic. * @exception java.lang.UnsupportedOperationException if a client uses this * method with a {@code TopicPublisher} that * did not specify a topic at creation time. */ void publish(Message message, int deliveryMode, int priority, long timeToLive) throws JMSException; /** Publishes a message to a topic for an unidentified message producer. * Uses the {@code 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 * * @exception JMSException if the JMS provider fails to publish the message * due to some internal error. * @exception MessageFormatException if an invalid message is specified. * @exception 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() */ void publish(Topic topic, Message message) throws JMSException; /** 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) * * @exception JMSException if the JMS provider fails to publish the message * due to some internal error. * @exception MessageFormatException if an invalid message is specified. * @exception InvalidDestinationException if a client uses * this method with an invalid topic. */ void publish(Topic topic, Message message, int deliveryMode, int priority, long timeToLive) throws JMSException; }





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