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<h2 title="Class IODispatcher" class="title">Class IODispatcher</h2>
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<pre>public class <span class="typeNameLabel">IODispatcher</span>
extends <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
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;, <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a></pre>
<div class="block">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 <a href="https://docs.oracle.com/javase/7/docs/api/java/nio/channels/Selector.html?is-external=true" title="class or interface in java.nio.channels"><code>Selector</code></a> 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>, <a href="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#removeEndpoint-org.apache.axis2.transport.udp.Endpoint-"><code>removeEndpoint(Endpoint)</code></a>
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
<a href="https://docs.oracle.com/javase/7/docs/api/java/nio/channels/Selector.html?is-external=true" title="class or interface in java.nio.channels"><code>Selector</code></a> 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
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#IODispatcher-org.apache.axis2.transport.base.datagram.DatagramDispatcherCallback-">IODispatcher</a></span>(<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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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#addEndpoint-org.apache.axis2.transport.udp.Endpoint-">addEndpoint</a></span>(<a href="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</a>&nbsp;endpoint)</code>
<div class="block">Add a new endpoint.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#removeEndpoint-org.apache.axis2.transport.udp.Endpoint-">removeEndpoint</a></span>(<a href="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</a>&nbsp;endpoint)</code>
<div class="block">Remove an endpoint.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#run--">run</a></span>()</code>
<div class="block">Run the I/O dispatcher.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/axis2/transport/udp/IODispatcher.html#stop--">stop</a></span>()</code>
<div class="block">Stop the dispatcher.</div>
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<h4>IODispatcher</h4>
<pre>public&nbsp;IODispatcher(<a href="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcherCallback.html" title="interface in org.apache.axis2.transport.base.datagram">DatagramDispatcherCallback</a>&nbsp;callback)
throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Constructor.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>callback</code> - </dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if the <a href="https://docs.oracle.com/javase/7/docs/api/java/nio/channels/Selector.html?is-external=true" title="class or interface in java.nio.channels"><code>Selector</code></a> instance could not be created</dd>
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<h4>addEndpoint</h4>
<pre>public&nbsp;void&nbsp;addEndpoint(<a href="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</a>&nbsp;endpoint)
throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">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.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html#addEndpoint-E-">addEndpoint</a></code>&nbsp;in interface&nbsp;<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></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>endpoint</code> - the endpoint description</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if the socket could not be created or
registered with the selector</dd>
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<h4>removeEndpoint</h4>
<pre>public&nbsp;void&nbsp;removeEndpoint(<a href="../../../../../org/apache/axis2/transport/udp/Endpoint.html" title="class in org.apache.axis2.transport.udp">Endpoint</a>&nbsp;endpoint)
throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Remove an endpoint. This causes the corresponding UDP socket to be
closed.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html#removeEndpoint-E-">removeEndpoint</a></code>&nbsp;in interface&nbsp;<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></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>endpoint</code> - the endpoint description</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if an error occurred when closing the socket</dd>
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<h4>stop</h4>
<pre>public&nbsp;void&nbsp;stop()
throws <a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">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.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/axis2/transport/base/datagram/DatagramDispatcher.html#stop--">stop</a></code>&nbsp;in interface&nbsp;<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></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>run</h4>
<pre>public&nbsp;void&nbsp;run()</pre>
<div class="block">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.</div>
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<dd><code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Runnable.html?is-external=true#run--" title="class or interface in java.lang">run</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a></code></dd>
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