serversession.html
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Java 2 Platform EE v1.3: Interface ServerSession
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javax.jms</FONT>
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Interface ServerSession</H2>
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<DT>public interface <B>ServerSession</B></DL>
<P>
A <CODE>ServerSession</CODE> object is an application server object that
is used by a server to associate a thread with a JMS session (optional).
<P>A <CODE>ServerSession</CODE> implements two methods:
<UL>
<LI><CODE>getSession</CODE> - returns the <CODE>ServerSession</CODE>'s
JMS session.
<LI><CODE>start</CODE> - starts the execution of the
<CODE>ServerSession</CODE>
thread and results in the execution of the JMS session's
<CODE>run</CODE> method.
</UL>
<P>A <CODE>ConnectionConsumer</CODE> implemented by a JMS provider uses a
<CODE>ServerSession</CODE> to process one or more messages that have
arrived. It does this by getting a <CODE>ServerSession</CODE> from the
<CODE>ConnectionConsumer</CODE>'s <CODE>ServerSessionPool</CODE>; getting
the <CODE>ServerSession</CODE>'s JMS session; loading it with the messages;
and then starting the <CODE>ServerSession</CODE>.
<P>In most cases the <CODE>ServerSession</CODE> will register some object
it provides as the <CODE>ServerSession</CODE>'s thread run object. The
<CODE>ServerSession</CODE>'s <CODE>start</CODE> method will call the
thread's <CODE>start</CODE> method, which will start the new thread, and
from it, call the <CODE>run</CODE> method of the
<CODE>ServerSession</CODE>'s run object. This object will do some
housekeeping and then call the <CODE>Session</CODE>'s <CODE>run</CODE>
method. When <CODE>run</CODE> returns, the <CODE>ServerSession</CODE>'s run
object can return the <CODE>ServerSession</CODE> to the
<CODE>ServerSessionPool</CODE>, and the cycle starts again.
<P>Note that the JMS API does not architect how the
<CODE>ConnectionConsumer</CODE> loads the <CODE>Session</CODE> with
messages. Since both the <CODE>ConnectionConsumer</CODE> and
<CODE>Session</CODE> are implemented by the same JMS provider, they can
accomplish the load using a private mechanism.
<P>
<DL>
<DT><B>See Also: </B><DD><A HREF="../../javax/jms/ServerSessionPool.html"><CODE>ServerSessionPool</CODE></A>,
<A HREF="../../javax/jms/ConnectionConsumer.html"><CODE>ConnectionConsumer</CODE></A></DL>
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<CODE> <A HREF="../../javax/jms/Session.html">Session</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/jms/ServerSession.html#getSession()">getSession</A></B>()</CODE>
<BR>
Return the <CODE>ServerSession</CODE>'s <CODE>Session</CODE>.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/jms/ServerSession.html#start()">start</A></B>()</CODE>
<BR>
Cause the <CODE>Session</CODE>'s <CODE>run</CODE> method to be called
to process messages that were just assigned to it.</TD>
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<A NAME="getSession()"><!-- --></A><H3>
getSession</H3>
<PRE>
public <A HREF="../../javax/jms/Session.html">Session</A> <B>getSession</B>()
throws <A HREF="../../javax/jms/JMSException.html">JMSException</A></PRE>
<DL>
<DD>Return the <CODE>ServerSession</CODE>'s <CODE>Session</CODE>. This must
be a <CODE>Session</CODE> created by the same <CODE>Connection</CODE>
that will be dispatching messages to it. The provider will assign one or
more messages to the <CODE>Session</CODE>
and then call <CODE>start</CODE> on the <CODE>ServerSession</CODE>.<DD><DL>
<DT><B>Returns:</B><DD>the server session's session<DT><B>Throws:</B><DD><CODE><A HREF="../../javax/jms/JMSException.html">JMSException</A></CODE> - if the JMS provider fails to get the associated
session for this <CODE>ServerSession</CODE> due
to some internal error.</DL>
</DD>
</DL>
<HR>
<A NAME="start()"><!-- --></A><H3>
start</H3>
<PRE>
public void <B>start</B>()
throws <A HREF="../../javax/jms/JMSException.html">JMSException</A></PRE>
<DL>
<DD>Cause the <CODE>Session</CODE>'s <CODE>run</CODE> method to be called
to process messages that were just assigned to it.<DD><DL>
<DT><B>Throws:</B><DD><CODE><A HREF="../../javax/jms/JMSException.html">JMSException</A></CODE> - if the JMS provider fails to start the server
session to process messages due to some internal
error.</DL>
</DD>
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