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Overview (ehcache)
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<a href="/" target="_top">ehcache</a></EM>
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Introduction
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============
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ehcache is a pure Java, in-process cache with the following features:
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1.
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<P>
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<B>See:</B>
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<A HREF="#overview_description"><B>Description</B></A>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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<B>Packages</B></FONT></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/package-summary.html">net.sf.ehcache</A></B></TD>
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<TD>This package contains the public API for using ehcache.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/bootstrap/package-summary.html">net.sf.ehcache.bootstrap</A></B></TD>
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<TD>This package contains the bootstrap cache loader interface and abstract factory.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/config/package-summary.html">net.sf.ehcache.config</A></B></TD>
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<TD>This package contains the cache configuration code.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/constructs/asynchronous/package-summary.html">net.sf.ehcache.constructs.asynchronous</A></B></TD>
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<TD> </TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/constructs/blocking/package-summary.html">net.sf.ehcache.constructs.blocking</A></B></TD>
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<TD>Doug Lea in his book Concurrent Programming in Java talks about concurrency support constructs.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/constructs/concurrent/package-summary.html">net.sf.ehcache.constructs.concurrent</A></B></TD>
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<TD>This package contains the Mutex class and Sync interface taken as is, with fixed for checkstyle and
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javadoc errors from version 1.3.4 of Doug Lea's concurrency package.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/constructs/web/package-summary.html">net.sf.ehcache.constructs.web</A></B></TD>
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<TD><p/>
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Constructs useful for Java EE Web Container environments, specifically the Servlet 2.3 and later specifications.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/constructs/web/filter/package-summary.html">net.sf.ehcache.constructs.web.filter</A></B></TD>
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<TD><p/>
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Caching filters compliant with the filters in the Servlet 2.3 specification.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/distribution/package-summary.html">net.sf.ehcache.distribution</A></B></TD>
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<TD>This package is for cache replication.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/distribution/jgroups/package-summary.html">net.sf.ehcache.distribution.jgroups</A></B></TD>
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<TD>This package is for cache replication using Jgroups.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/event/package-summary.html">net.sf.ehcache.event</A></B></TD>
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<TD>This package contains interfaces and classes for listening to events.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/exceptionhandler/package-summary.html">net.sf.ehcache.exceptionhandler</A></B></TD>
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<TD>This package is for exception handling.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/extension/package-summary.html">net.sf.ehcache.extension</A></B></TD>
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<TD>This package contains interfaces and classes for the cache extension mechanism.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/hibernate/package-summary.html">net.sf.ehcache.hibernate</A></B></TD>
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<TD>This package contains interfaces and classes for Hibernate3.1 and higher.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/jcache/package-summary.html">net.sf.ehcache.jcache</A></B></TD>
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<TD>This package contains an implementation of JSR-107: the JCACHE API.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/loader/package-summary.html">net.sf.ehcache.loader</A></B></TD>
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<TD>This package contains a cache loaders and associated factories.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/management/package-summary.html">net.sf.ehcache.management</A></B></TD>
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<TD>This package contains JMX MBeans and implementations for management of ehcache.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/store/package-summary.html">net.sf.ehcache.store</A></B></TD>
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<TD>Store package.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD WIDTH="20%"><B><A HREF="net/sf/ehcache/util/package-summary.html">net.sf.ehcache.util</A></B></TD>
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<TD>Util package.</TD>
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</TR>
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</TABLE>
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<P>
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<A NAME="overview_description"><!-- --></A>
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<P>
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<pre>
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Introduction
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============
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ehcache is a pure Java, in-process cache with the following features:
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1. Fast.
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2. Simple.
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3. Multiple eviction policies: LRU, LFU and FIFO.
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4. Caches can be in memory or on disk.
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5. Disk Stores can be persistent between VM restarts.
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6. Distributed caching using multicast and RMI, with a pluggable API.
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7. Cache and CacheManager listeners
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8. Supports multiple Caches per CacheManager, and multiple CacheManagers per application.
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9. Acts as a pluggable cache for Hibernate 3.1, 3 and 2.1.
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10. Small foot print. Both in terms of size and memory requirements.
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11. Minimal dependencies apart from J2SE.
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12. Fully documented. See the online Documentation and the online JavaDoc.
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13. Comprehensive Test Coverage. See the clover test report.
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14. Available under the Apache 1.1 license. EHCache's copyright and licensing has been reviewed and approved by the Apache Software Foundation, making EHCache suitable for use in Apache projects.
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15. Production tested. EHCache is used on a large and very busy eCommerce site.
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16. Web caching, pull-through caches and other common caching implementations are provided in the ehcache-constructs module.
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Java Requirements
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=================
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ehcache supports 1.3, 1.4, 1.5 and 1.6 at runtime. When compiling from source, the build process requires at least JDK1.5.
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ehcache does not work with JDK1.1 and is not tested on JDK1.2.
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Dependencies
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============
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For JDK1.4, ehcache requires commons-logging from Apache's Jakarta project.
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For JDK 1.3, ehcache requires:
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- Apache Jakarta's commons-collections, version 2.1.1
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- Apache xerces (xml-apis.jar and xercesImpl.jar), version 2.5
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All three dependencies are also Hibernate dependencies, so if you are using ehcache as a Hibernate plugin, dependency requirements are met.
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Installation
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============
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Place the ehcache.jar into your classpath. Ensure the required dependencies are in the classpath.
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Create an ehcache.xml configuration from the one supplied in the distribution and place it in your classpath.
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Documentation
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=============
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See http://ehcache.sourceforge.net/documentation for full documentation.
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The JavaDoc is in the distribution and also online at http://ehcache.sourceforge.net/javadoc.
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</pre>
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