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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<title>mxSession (mxGraph 3.1.1.0 API Specification)</title>
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<div class="subTitle">com.mxgraph.sharing</div>
<h2 title="Class mxSession" class="title">Class mxSession</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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<ul class="inheritance">
<li>com.mxgraph.sharing.mxSession</li>
</ul>
</li>
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<div class="description">
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html" title="interface in com.mxgraph.sharing">mxSharedState.mxDiagramChangeListener</a></dd>
</dl>
<hr>
<br>
<pre>public class <span class="strong">mxSession</span>
extends <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html" title="interface in com.mxgraph.sharing">mxSharedState.mxDiagramChangeListener</a></pre>
<div class="block">Implements a session that may be attached to a shared diagram. The session
contains a synchronized buffer which is used to hold the pending edits which
are to be sent to a specific client. The update mechnism between the server
and the client uses HTTP requests (polling). The request is kept on the server
for an amount of time or wakes up / returns immediately if the buffer is no
longer empty.</div>
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<h3>Field Summary</h3>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/StringBuffer.html?is-external=true" title="class or interface in java.lang">StringBuffer</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#buffer">buffer</a></strong></code>
<div class="block">Holds the send buffer for this session.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#DEFAULT_TIMEOUT">DEFAULT_TIMEOUT</a></strong></code>
<div class="block">Default timeout is 10000 ms.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../com/mxgraph/sharing/mxSharedState.html" title="class in com.mxgraph.sharing">mxSharedState</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#diagram">diagram</a></strong></code>
<div class="block">Reference to the shared diagram.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#id">id</a></strong></code>
<div class="block">Holds the session ID.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected long</code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#lastTimeMillis">lastTimeMillis</a></strong></code>
<div class="block">Holds the last active time millis.</div>
</td>
</tr>
</table>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#mxSession(java.lang.String, com.mxgraph.sharing.mxSharedState)">mxSession</a></strong>(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;id,
<a href="../../../com/mxgraph/sharing/mxSharedState.html" title="class in com.mxgraph.sharing">mxSharedState</a>&nbsp;diagram)</code>
<div class="block">Constructs a new session with the given ID.</div>
</td>
</tr>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#destroy()">destroy</a></strong>()</code>
<div class="block">Destroys the session and removes its listener from the shared diagram.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#diagramChanged(java.lang.Object, java.lang.String)">diagramChanged</a></strong>(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;sender,
<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;edits)</code>
<div class="block">Fires when the shared diagram was changed.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#getId()">getId</a></strong>()</code>
<div class="block">Returns the session ID.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#getInitialMessage()">getInitialMessage</a></strong>()</code>
<div class="block">Returns an XML string that represents the current state of the session
and the shared diagram.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#inactiveTimeMillis()">inactiveTimeMillis</a></strong>()</code>
<div class="block">Returns the number of milliseconds this session has been inactive.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#init()">init</a></strong>()</code>
<div class="block">Initializes the session buffer and returns a string that represents the
state of the session.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#poll()">poll</a></strong>()</code>
<div class="block">Returns the changes received by other sessions for the shared diagram.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#poll(long)">poll</a></strong>(long&nbsp;timeout)</code>
<div class="block">Returns the changes received by other sessions for the shared diagram.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../com/mxgraph/sharing/mxSession.html#receive(org.w3c.dom.Node)">receive</a></strong>(<a href="http://download.oracle.com/javase/1.5.0/docs/api/org/w3c/dom/Node.html?is-external=true" title="class or interface in org.w3c.dom">Node</a>&nbsp;message)</code>
<div class="block">Posts the change represented by the given XML string to the shared diagram.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li>
</ul>
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<h3>Field Detail</h3>
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<h4>DEFAULT_TIMEOUT</h4>
<pre>public static&nbsp;int DEFAULT_TIMEOUT</pre>
<div class="block">Default timeout is 10000 ms.</div>
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<h4>id</h4>
<pre>protected&nbsp;<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> id</pre>
<div class="block">Holds the session ID.</div>
</li>
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<a name="diagram">
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<h4>diagram</h4>
<pre>protected&nbsp;<a href="../../../com/mxgraph/sharing/mxSharedState.html" title="class in com.mxgraph.sharing">mxSharedState</a> diagram</pre>
<div class="block">Reference to the shared diagram.</div>
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<h4>buffer</h4>
<pre>protected&nbsp;<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/StringBuffer.html?is-external=true" title="class or interface in java.lang">StringBuffer</a> buffer</pre>
<div class="block">Holds the send buffer for this session.</div>
</li>
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<a name="lastTimeMillis">
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<h4>lastTimeMillis</h4>
<pre>protected&nbsp;long lastTimeMillis</pre>
<div class="block">Holds the last active time millis.</div>
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<h3>Constructor Detail</h3>
<a name="mxSession(java.lang.String, com.mxgraph.sharing.mxSharedState)">
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<h4>mxSession</h4>
<pre>public&nbsp;mxSession(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;id,
<a href="../../../com/mxgraph/sharing/mxSharedState.html" title="class in com.mxgraph.sharing">mxSharedState</a>&nbsp;diagram)</pre>
<div class="block">Constructs a new session with the given ID.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>id</code> - Specifies the session ID to be used.</dd><dd><code>diagram</code> - Reference to the shared diagram.</dd></dl>
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<a name="getId()">
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<h4>getId</h4>
<pre>public&nbsp;<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getId()</pre>
<div class="block">Returns the session ID.</div>
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<a name="init()">
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<h4>init</h4>
<pre>public&nbsp;<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;init()</pre>
<div class="block">Initializes the session buffer and returns a string that represents the
state of the session.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Returns the initial state of the session.</dd></dl>
</li>
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<a name="getInitialMessage()">
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<h4>getInitialMessage</h4>
<pre>public&nbsp;<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getInitialMessage()</pre>
<div class="block">Returns an XML string that represents the current state of the session
and the shared diagram. A globally unique ID is used as the session's
namespace, which is used on the client side to prefix IDs of newly
created cells.</div>
</li>
</ul>
<a name="receive(org.w3c.dom.Node)">
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<h4>receive</h4>
<pre>public&nbsp;void&nbsp;receive(<a href="http://download.oracle.com/javase/1.5.0/docs/api/org/w3c/dom/Node.html?is-external=true" title="class or interface in org.w3c.dom">Node</a>&nbsp;message)</pre>
<div class="block">Posts the change represented by the given XML string to the shared diagram.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>message</code> - XML that represents the change.</dd></dl>
</li>
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<a name="poll()">
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<h4>poll</h4>
<pre>public&nbsp;<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;poll()
throws <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre>
<div class="block">Returns the changes received by other sessions for the shared diagram.
The method returns an empty XML node if no change was received within
10 seconds.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>Returns a string representing the changes to the shared diagram.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd></dl>
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<a name="poll(long)">
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<h4>poll</h4>
<pre>public&nbsp;<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;poll(long&nbsp;timeout)
throws <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre>
<div class="block">Returns the changes received by other sessions for the shared diagram.
The method returns an empty XML node if no change was received within
the given timeout.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>timeout</code> - Time in milliseconds to wait for changes.</dd>
<dt><span class="strong">Returns:</span></dt><dd>Returns a string representing the changes to the shared diagram.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd></dl>
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<a name="diagramChanged(java.lang.Object, java.lang.String)">
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<h4>diagramChanged</h4>
<pre>public&nbsp;void&nbsp;diagramChanged(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;sender,
<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;edits)</pre>
<div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html#diagramChanged(java.lang.Object, java.lang.String)">mxSharedState.mxDiagramChangeListener</a></code></strong></div>
<div class="block">Fires when the shared diagram was changed.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html#diagramChanged(java.lang.Object, java.lang.String)">diagramChanged</a></code>&nbsp;in interface&nbsp;<code><a href="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html" title="interface in com.mxgraph.sharing">mxSharedState.mxDiagramChangeListener</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>sender</code> - Session where the change was received from.</dd><dd><code>edits</code> - String that represents the edits.</dd></dl>
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<h4>inactiveTimeMillis</h4>
<pre>public&nbsp;long&nbsp;inactiveTimeMillis()</pre>
<div class="block">Returns the number of milliseconds this session has been inactive.</div>
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<h4>destroy</h4>
<pre>public&nbsp;void&nbsp;destroy()</pre>
<div class="block">Destroys the session and removes its listener from the shared diagram.</div>
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