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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Sat May 03 22:10:34 PDT 2003 --><TITLE>SessionWatcher (PhotoServlet API Documentation - build 120 from 2003/05/03 22:10)</TITLE><META NAME="keywords" CONTENT="net.spy.photo.SessionWatcher,SessionWatcher class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><SCRIPT>function asd(){parent.document.title="SessionWatcher (PhotoServlet API Documentation - build 120 from 2003/05/03 22:10)";}</SCRIPT><BODY BGCOLOR="white" onload="asd();"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" 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SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">net.spy.photo</FONT><BR>Class SessionWatcher</H2><PRE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">java.lang.Object</A> | +--<B>net.spy.photo.SessionWatcher</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/EventListener.html">EventListener</A>, javax.servlet.http.HttpSessionListener</DD></DL><HR><DL><DT>public class <B>SessionWatcher</B><DT>extends <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A><DT>implements javax.servlet.http.HttpSessionListener</DL><P>Watch session creation and destruction and manage sessionData.<P><P><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../net/spy/photo/SessionWatcher.html#SessionWatcher()">SessionWatcher</A></B>()</CODE><BR> Get an instance of SessionWatcher.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../net/spy/photo/SessionWatcher.html#getSessionCountByUser(java.lang.String)">getSessionCountByUser</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html">String</A> username)</CODE><BR> Return the number of sessions containing the given user.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Collection.html">Collection</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../net/spy/photo/SessionWatcher.html#getSessionDataByUser(java.lang.String)">getSessionDataByUser</A></B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html">String</A> username)</CODE><BR> Get the SessionData from each session that represents the given user.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Collection.html">Collection</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../net/spy/photo/SessionWatcher.html#listSessions()">listSessions</A></B>()</CODE><BR> Get a Collection of HttpSession objects representing all users currently in the system.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../net/spy/photo/SessionWatcher.html#sessionCreated(javax.servlet.http.HttpSessionEvent)">sessionCreated</A></B>(javax.servlet.http.HttpSessionEvent se)</CODE><BR> Called when a session is created.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../net/spy/photo/SessionWatcher.html#sessionDestroyed(javax.servlet.http.HttpSessionEvent)">sessionDestroyed</A></B>(javax.servlet.http.HttpSessionEvent se)</CODE><BR> Called when a session is destroyed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../net/spy/photo/SessionWatcher.html#totalSessions()">totalSessions</A></B>()</CODE><BR> Get the total number of sessions currently in this engine.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#clone()">clone</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#equals(java.lang.Object)">equals</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#finalize()">finalize</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#getClass()">getClass</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#hashCode()">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#notify()">notify</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#toString()">toString</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait()">wait</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait(long)">wait</A>, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html#wait(long, int)">wait</A></CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="SessionWatcher()"><!-- --></A><H3>SessionWatcher</H3><PRE>public <B>SessionWatcher</B>()</PRE><DL><DD>Get an instance of SessionWatcher.<P></DL><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="sessionCreated(javax.servlet.http.HttpSessionEvent)"><!-- --></A><H3>sessionCreated</H3><PRE>public void <B>sessionCreated</B>(javax.servlet.http.HttpSessionEvent se)</PRE><DL><DD>Called when a session is created.<P><DD><DL><DT><B>Specified by:</B><DD><CODE>sessionCreated</CODE> in interface <CODE>javax.servlet.http.HttpSessionListener</CODE></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="sessionDestroyed(javax.servlet.http.HttpSessionEvent)"><!-- --></A><H3>sessionDestroyed</H3><PRE>public void <B>sessionDestroyed</B>(javax.servlet.http.HttpSessionEvent se)</PRE><DL><DD>Called when a session is destroyed.<P><DD><DL><DT><B>Specified by:</B><DD><CODE>sessionDestroyed</CODE> in interface <CODE>javax.servlet.http.HttpSessionListener</CODE></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="totalSessions()"><!-- --></A><H3>totalSessions</H3><PRE>public static int <B>totalSessions</B>()</PRE><DL><DD>Get the total number of sessions currently in this engine.<P><DD><DL></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="getSessionDataByUser(java.lang.String)"><!-- --></A><H3>getSessionDataByUser</H3><PRE>public static <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Collection.html">Collection</A> <B>getSessionDataByUser</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html">String</A> username)</PRE><DL><DD>Get the SessionData from each session that represents the given user.<P><DD><DL></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="getSessionCountByUser(java.lang.String)"><!-- --></A><H3>getSessionCountByUser</H3><PRE>public static int <B>getSessionCountByUser</B>(<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/String.html">String</A> username)</PRE><DL><DD>Return the number of sessions containing the given user.<P><DD><DL></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="listSessions()"><!-- --></A><H3>listSessions</H3><PRE>public static <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Collection.html">Collection</A> <B>listSessions</B>()</PRE><DL><DD>Get a Collection of HttpSession objects representing all users currently in the system.<P><DD><DL></DL></DD><DD><DL></DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/SessionWatcher.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../net/spy/photo/SavedSearch.html"><B>PREV CLASS</B></A> <A HREF="../../../net/spy/photo/Vote.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="SessionWatcher.html" TARGET="_top"><B>NO FRAMES</B></A> <SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT><A 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