javax.jms.ServerSession Maven / Gradle / Ivy
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package javax.jms;
/** A {@code ServerSession} object is an application server object that
* is used by a server to associate a thread with a JMS session (optional).
*
* A {@code ServerSession} implements two methods:
*
*
* - {@code getSession} - returns the {@code ServerSession}'s
* JMS session.
*
- {@code start} - starts the execution of the
* {@code ServerSession}
* thread and results in the execution of the JMS session's
* {@code run} method.
*
*
* A {@code ConnectionConsumer} implemented by a JMS provider uses a
* {@code ServerSession} to process one or more messages that have
* arrived. It does this by getting a {@code ServerSession} from the
* {@code ConnectionConsumer}'s {@code ServerSessionPool}; getting
* the {@code ServerSession}'s JMS session; loading it with the messages;
* and then starting the {@code ServerSession}.
*
*
In most cases the {@code ServerSession} will register some object
* it provides as the {@code ServerSession}'s thread run object. The
* {@code ServerSession}'s {@code start} method will call the
* thread's {@code start} method, which will start the new thread, and
* from it, call the {@code run} method of the
* {@code ServerSession}'s run object. This object will do some
* housekeeping and then call the {@code Session}'s {@code run}
* method. When {@code run} returns, the {@code ServerSession}'s run
* object can return the {@code ServerSession} to the
* {@code ServerSessionPool}, and the cycle starts again.
*
*
Note that the JMS API does not architect how the
* {@code ConnectionConsumer} loads the {@code Session} with
* messages. Since both the {@code ConnectionConsumer} and
* {@code Session} are implemented by the same JMS provider, they can
* accomplish the load using a private mechanism.
*
* @version 1.0 - 9 March 1998
* @author Mark Hapner
* @author Rich Burridge
*
* @see javax.jms.ServerSessionPool
* @see javax.jms.ConnectionConsumer
*/
public interface ServerSession {
/** Return the {@code ServerSession}'s {@code Session}. This must
* be a {@code Session} created by the same {@code Connection}
* that will be dispatching messages to it. The provider will assign one or
* more messages to the {@code Session}
* and then call {@code start} on the {@code ServerSession}.
*
* @return the server session's session
*
* @exception JMSException if the JMS provider fails to get the associated
* session for this {@code ServerSession} due
* to some internal error.
**/
Session
getSession() throws JMSException;
/** Cause the {@code Session}'s {@code run} method to be called
* to process messages that were just assigned to it.
*
* @exception JMSException if the JMS provider fails to start the server
* session to process messages due to some internal
* error.
*/
void
start() throws JMSException;
}