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There are no code changes required for this - your application server should support servlet filtering already. Simply update your web.xml file, re-deploy and you should see the speedup right away.

The basic steps you'll need to follow to configure Ehcache for web page caching are (note that these steps assume you already have Ehcache installed in your application):

  1. Configure a servlet page filter in web.xml
  2. Configure an appropriate cache in ehcache.xml
  3. Start (or re-start) your application

The following settings should help you setup web caching for your application.

Step 1 - Add a filter to your web.xml

The first thing you'll need to do is add a filter to enable page caching.

The following web.xml settings will enable a servlet filter for page caching:

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd "
version="2.5">
<filter>
<filter-name>SimplePageCachingFilter</filter-name>
<filter-class>net.sf.ehcache.constructs.web.filter.SimplePageCachingFilter
</filter-class>
</filter>
<!-- This is a filter chain. They are executed in the order below.
Do not change the order. -->
<filter-mapping>
<filter-name>SimplePageCachingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

Step 2 - Configure an ehcache.xml

The second step to enabling web page caching is to configure ehcache with an appropriate ehcache.xml.

The following ehcache.xml file should configure a reasonable default ehcache:

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="../../main/config/ehcache.xsd">
<cache name="SimplePageCachingFilter"
maxElementsInMemory="10000"
maxElementsOnDisk="1000"
eternal="false"
overflowToDisk="true"
timeToIdleSeconds="300"
timeToLiveSeconds="600"
memoryStoreEvictionPolicy="LFU"
/>
</ehcache>

Step 3 - Start your application server

Now start your application server. Pages should be cached.

posted on 2011-05-12 16:11 周锐 阅读(799) 评论(0)  编辑  收藏 所属分类: HTMLJava

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