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IODispatcher (Apache Axis2 - Transport - Root 1.0.0 API)
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org.apache.axis2.transport.udp</FONT>
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Class IODispatcher</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.axis2.transport.udp.IODispatcher</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD>java.lang.Runnable, <A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcher</A>&lt;<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&gt;</DD>
</DL>
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<DT><PRE>public class <B>IODispatcher</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcher</A>&lt;<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&gt;, java.lang.Runnable</DL>
</PRE>
<P>
I/O dispatcher for incoming UDP packets.
This class is responsible for receiving UDP packets and dispatch
the processing of these packets to worker threads.
It uses a <CODE>Selector</CODE> to receive packets from multiple endpoints
and a <A HREF="../../../../../org/apache/axis2/transport/base/threads/WorkerPool.html" title="interface in org.apache.axis2.transport.base.threads"><CODE>WorkerPool</CODE></A> to dispatch the processing tasks.
<p>
The dispatcher uses the following thread model:
Incoming packets for all the registered endpoints are received
in the thread that executes the <A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#run()"><CODE>run()</CODE></A> method. For every
packet received, a <A HREF="../../../../../org/apache/axis2/transport/base/datagram/ProcessPacketTask.html" title="class in org.apache.axis2.transport.base.datagram"><CODE>ProcessPacketTask</CODE></A> instance is created
and dispatched to a worker thread from the configured pool.
<p>
The methods <A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#addEndpoint(org.apache.axis2.transport.udp.Endpoint)"><CODE>addEndpoint(Endpoint)</CODE></A>, <CODE>#removeEndpoint(String)</CODE>
and <A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#stop()"><CODE>stop()</CODE></A> are thread safe and may be called from any thread.
However, to avoid concurrency issues, the operation on the underlying
<CODE>Selector</CODE> will always be executed by the thread executing the
<A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#run()"><CODE>run()</CODE></A> method. The three methods mentioned above will block until
the operation has completed.
<P>
<P>
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<TD><CODE><B><A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#IODispatcher(org.apache.axis2.transport.base.datagram.DatagramDispatcherCallback)">IODispatcher</A></B>(<A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcherCallback.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcherCallback</A>&nbsp;callback)</CODE>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructor.</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#addEndpoint(org.apache.axis2.transport.udp.Endpoint)">addEndpoint</A></B>(<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&nbsp;endpoint)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Add a new endpoint.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#removeEndpoint(org.apache.axis2.transport.udp.Endpoint)">removeEndpoint</A></B>(<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&nbsp;endpoint)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Remove an endpoint.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#run()">run</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Run the I/O dispatcher.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#stop()">stop</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stop the dispatcher.</TD>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="IODispatcher(org.apache.axis2.transport.base.datagram.DatagramDispatcherCallback)"><!-- --></A><H3>
IODispatcher</H3>
<PRE>
public <B>IODispatcher</B>(<A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcherCallback.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcherCallback</A>&nbsp;callback)
throws java.io.IOException</PRE>
<DL>
<DD>Constructor.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>callback</CODE> -
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if the <CODE>Selector</CODE> instance could not be created</DL>
</DL>
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<A NAME="addEndpoint(org.apache.axis2.transport.udp.Endpoint)"><!-- --></A><H3>
addEndpoint</H3>
<PRE>
public void <B>addEndpoint</B>(<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&nbsp;endpoint)
throws java.io.IOException</PRE>
<DL>
<DD>Add a new endpoint. This method creates a new socket listening on
the UDP port specified in the endpoint description and makes sure
that incoming packets are routed to the specified service.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html#addEndpoint(E)">addEndpoint</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcher</A>&lt;<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&gt;</CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>endpoint</CODE> - the endpoint description
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if the socket could not be created or
registered with the selector</DL>
</DD>
</DL>
<HR>
<A NAME="removeEndpoint(org.apache.axis2.transport.udp.Endpoint)"><!-- --></A><H3>
removeEndpoint</H3>
<PRE>
public void <B>removeEndpoint</B>(<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&nbsp;endpoint)
throws java.io.IOException</PRE>
<DL>
<DD>Remove an endpoint. This causes the corresponding UDP socket to be
closed.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html#removeEndpoint(E)">removeEndpoint</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcher</A>&lt;<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&gt;</CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>endpoint</CODE> - the endpoint description
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if an error occurred when closing the socket</DL>
</DD>
</DL>
<HR>
<A NAME="stop()"><!-- --></A><H3>
stop</H3>
<PRE>
public void <B>stop</B>()
throws java.io.IOException</PRE>
<DL>
<DD>Stop the dispatcher.
This method closes all sockets and causes the execution of the
<A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#run()"><CODE>run()</CODE></A> method to stop.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html#stop()">stop</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcher</A>&lt;<A HREF="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</A>&gt;</CODE></DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>
<A NAME="run()"><!-- --></A><H3>
run</H3>
<PRE>
public void <B>run</B>()</PRE>
<DL>
<DD>Run the I/O dispatcher.
This method contains the event loop that polls the selector, reads the incoming
packets and dispatches the work.
It only returns when <A HREF="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#stop()"><CODE>stop()</CODE></A> is called.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>run</CODE> in interface <CODE>java.lang.Runnable</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
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