maxGraph/java/docs/com/mxgraph/sharing/mxSession.html

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mxSession (mxGraph 2.1.0.5 API Specification)
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com.mxgraph.sharing</FONT>
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Class mxSession</H2>
<PRE>
<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>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.mxgraph.sharing.mxSession</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html" title="interface in com.mxgraph.sharing">mxSharedState.mxDiagramChangeListener</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>mxSession</B><DT>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><DT>implements <A HREF="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html" title="interface in com.mxgraph.sharing">mxSharedState.mxDiagramChangeListener</A></DL>
</PRE>
<P>
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.
<P>
<P>
<HR>
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<!-- =========== FIELD SUMMARY =========== -->
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<B>Field Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#buffer">buffer</A></B></CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Holds the send buffer for this session.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#DEFAULT_TIMEOUT">DEFAULT_TIMEOUT</A></B></CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Default timeout is 10000 ms.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;<A HREF="../../../com/mxgraph/sharing/mxSharedState.html" title="class in com.mxgraph.sharing">mxSharedState</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#diagram">diagram</A></B></CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reference to the shared diagram.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#id">id</A></B></CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Holds the session ID.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#lastTimeMillis">lastTimeMillis</A></B></CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Holds the last active time millis.</TD>
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<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#mxSession(java.lang.String, com.mxgraph.sharing.mxSharedState)">mxSession</A></B>(<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>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new session with the given ID.</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#destroy()">destroy</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Destroys the session and removes its listener from the shared diagram.</TD>
</TR>
<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="../../../com/mxgraph/sharing/mxSession.html#diagramChanged(java.lang.Object, java.lang.String)">diagramChanged</A></B>(<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>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Fires when the shared diagram was changed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#getId()">getId</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the session ID.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#getInitialMessage()">getInitialMessage</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns an XML string that represents the current state of the session
and the shared diagram.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#inactiveTimeMillis()">inactiveTimeMillis</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the number of milliseconds this session has been inactive.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#init()">init</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Initializes the session buffer and returns a string that represents the
state of the session.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#poll()">poll</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the changes received by other sessions for the shared diagram.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/mxgraph/sharing/mxSession.html#poll(long)">poll</A></B>(long&nbsp;timeout)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the changes received by other sessions for the shared diagram.</TD>
</TR>
<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="../../../com/mxgraph/sharing/mxSession.html#receive(org.w3c.dom.Node)">receive</A></B>(<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>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Posts the change represented by the given XML string to the shared diagram.</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class 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></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><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></TD>
</TR>
</TABLE>
&nbsp;
<P>
<!-- ============ FIELD DETAIL =========== -->
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<A NAME="DEFAULT_TIMEOUT"><!-- --></A><H3>
DEFAULT_TIMEOUT</H3>
<PRE>
public static int <B>DEFAULT_TIMEOUT</B></PRE>
<DL>
<DD>Default timeout is 10000 ms.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="id"><!-- --></A><H3>
id</H3>
<PRE>
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> <B>id</B></PRE>
<DL>
<DD>Holds the session ID.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="diagram"><!-- --></A><H3>
diagram</H3>
<PRE>
protected <A HREF="../../../com/mxgraph/sharing/mxSharedState.html" title="class in com.mxgraph.sharing">mxSharedState</A> <B>diagram</B></PRE>
<DL>
<DD>Reference to the shared diagram.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="buffer"><!-- --></A><H3>
buffer</H3>
<PRE>
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> <B>buffer</B></PRE>
<DL>
<DD>Holds the send buffer for this session.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="lastTimeMillis"><!-- --></A><H3>
lastTimeMillis</H3>
<PRE>
protected long <B>lastTimeMillis</B></PRE>
<DL>
<DD>Holds the last active time millis.
<P>
<DL>
</DL>
</DL>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="mxSession(java.lang.String, com.mxgraph.sharing.mxSharedState)"><!-- --></A><H3>
mxSession</H3>
<PRE>
public <B>mxSession</B>(<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>
<DL>
<DD>Constructs a new session with the given ID.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>id</CODE> - Specifies the session ID to be used.<DD><CODE>diagram</CODE> - Reference to the shared diagram.</DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Method Detail</B></FONT></TH>
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<A NAME="getId()"><!-- --></A><H3>
getId</H3>
<PRE>
public <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> <B>getId</B>()</PRE>
<DL>
<DD>Returns the session ID.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="init()"><!-- --></A><H3>
init</H3>
<PRE>
public <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> <B>init</B>()</PRE>
<DL>
<DD>Initializes the session buffer and returns a string that represents the
state of the session.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>Returns the initial state of the session.</DL>
</DD>
</DL>
<HR>
<A NAME="getInitialMessage()"><!-- --></A><H3>
getInitialMessage</H3>
<PRE>
public <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> <B>getInitialMessage</B>()</PRE>
<DL>
<DD>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.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="receive(org.w3c.dom.Node)"><!-- --></A><H3>
receive</H3>
<PRE>
public void <B>receive</B>(<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>
<DL>
<DD>Posts the change represented by the given XML string to the shared diagram.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>message</CODE> - XML that represents the change.</DL>
</DD>
</DL>
<HR>
<A NAME="poll()"><!-- --></A><H3>
poll</H3>
<PRE>
public <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> <B>poll</B>()
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>
<DL>
<DD>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.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>Returns a string representing the changes to the shared diagram.
<DT><B>Throws:</B>
<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></DL>
</DD>
</DL>
<HR>
<A NAME="poll(long)"><!-- --></A><H3>
poll</H3>
<PRE>
public <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> <B>poll</B>(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>
<DL>
<DD>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.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>timeout</CODE> - Time in milliseconds to wait for changes.
<DT><B>Returns:</B><DD>Returns a string representing the changes to the shared diagram.
<DT><B>Throws:</B>
<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></DL>
</DD>
</DL>
<HR>
<A NAME="diagramChanged(java.lang.Object, java.lang.String)"><!-- --></A><H3>
diagramChanged</H3>
<PRE>
public void <B>diagramChanged</B>(<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>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html#diagramChanged(java.lang.Object, java.lang.String)">mxSharedState.mxDiagramChangeListener</A></CODE></B></DD>
<DD>Fires when the shared diagram was changed.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html#diagramChanged(java.lang.Object, java.lang.String)">diagramChanged</A></CODE> in interface <CODE><A HREF="../../../com/mxgraph/sharing/mxSharedState.mxDiagramChangeListener.html" title="interface in com.mxgraph.sharing">mxSharedState.mxDiagramChangeListener</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>sender</CODE> - Session where the change was received from.<DD><CODE>edits</CODE> - String that represents the edits.</DL>
</DD>
</DL>
<HR>
<A NAME="inactiveTimeMillis()"><!-- --></A><H3>
inactiveTimeMillis</H3>
<PRE>
public long <B>inactiveTimeMillis</B>()</PRE>
<DL>
<DD>Returns the number of milliseconds this session has been inactive.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="destroy()"><!-- --></A><H3>
destroy</H3>
<PRE>
public void <B>destroy</B>()</PRE>
<DL>
<DD>Destroys the session and removes its listener from the shared diagram.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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