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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Fri Dec 06 19:57:08 CET 2002 --><TITLE>jakarta-turbine-2 2.2 API: Class RefreshableCachedObject</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 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" 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/RefreshableCachedObject.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="../../../../../org/apache/turbine/services/cache/CachedObject.html"><B>PREV CLASS</B></A> <A HREF="../../../../../org/apache/turbine/services/cache/TurbineGlobalCache.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="RefreshableCachedObject.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#fields_inherited_from_class_org.apache.turbine.services.cache.CachedObject">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT 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">org.apache.turbine.services.cache</FONT><BR>Class RefreshableCachedObject</H2><PRE>java.lang.Object | +--<A HREF="../../../../../org/apache/turbine/services/cache/CachedObject.html">org.apache.turbine.services.cache.CachedObject</A> | +--<B>org.apache.turbine.services.cache.RefreshableCachedObject</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.io.Serializable</DD></DL><HR><DL><DT>public class <B>RefreshableCachedObject</B><DT>extends <A HREF="../../../../../org/apache/turbine/services/cache/CachedObject.html">CachedObject</A></DL><P>The idea of the RefreshableCachedObject is that, rather than removing items from the cache when they become stale, we'll tell them to refresh themselves instead. That way they'll always be in the cache, and the code to refresh them will be run by the background thread rather than by a user request thread. You can also set a TTL (Time To Live) for the object. This way, if the object hasn't been touched for the TTL period, then it will be removed from the cache. This extends CachedObject and provides a method for refreshing the cached object, and resetting its expire time.<P><DL><DT><B>Version: </B><DD>$Id: RefreshableCachedObject.java,v 1.2 2002/01/30 16:11:21 dlr Exp $</DD><DT><B>Author: </B><DD><a href="mailto:nissim@nksystems.com">Nissim Karpenstein</a></DD><DT><B>See Also: </B><DD><A HREF="../../../../../serialized-form.html#org.apache.turbine.services.cache.RefreshableCachedObject">Serialized Form</A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="fields_inherited_from_class_org.apache.turbine.services.cache.CachedObject"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class org.apache.turbine.services.cache.<A HREF="../../../../../org/apache/turbine/services/cache/CachedObject.html">CachedObject</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../../org/apache/turbine/services/cache/CachedObject.html#created">created</A>, <A HREF="../../../../../org/apache/turbine/services/cache/CachedObject.html#DEFAULT">DEFAULT</A>, <A HREF="../../../../../org/apache/turbine/services/cache/CachedObject.html#FOREVER">FOREVER</A></CODE></TD></TR></TABLE> <!-- ======== 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="../../../../../org/apache/turbine/services/cache/RefreshableCachedObject.html#RefreshableCachedObject(org.apache.turbine.services.cache.Refreshable)">RefreshableCachedObject</A></B>(<A HREF="../../../../../org/apache/turbine/services/cache/Refreshable.html">Refreshable</A> o)</CODE><BR> Constructor; sets the object to expire in the default time (30 minutes).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/apache/turbine/services/cache/RefreshableCachedObject.html#RefreshableCachedObject(org.apache.turbine.services.cache.Refreshable, long)">RefreshableCachedObject</A></B>(<A HREF="../../../../../org/apache/turbine/services/cache/Refreshable.html">Refreshable</A> o, long expires)</CODE><BR> Constructor.</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> long</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/turbine/services/cache/RefreshableCachedObject.html#getTTL()">getTTL</A></B>()</CODE><BR> gets the timeToLive member (in milliseconds)</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/turbine/services/cache/RefreshableCachedObject.html#isUntouched()">isUntouched</A></B>()</CODE><BR> Returns true if the object hasn't been touched in the previous TTL period.</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="../../../../../org/apache/turbine/services/cache/RefreshableCachedObject.html#refresh()">refresh</A></B>()</CODE><BR> Refresh the object and the created time.</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="../../../../../org/apache/turbine/services/cache/RefreshableCachedObject.html#setTTL(long)">setTTL</A></B>(long l)</CODE>⌨️ 快捷键说明
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