org.apache.commons.logging.impl

类 ServletContextCleaner

java.lang.Object

org.apache.commons.logging.impl.ServletContextCleaner

所有已实现的接口:

java.util.EventListener, javax.servlet.ServletContextListener

public class ServletContextCleaner
extends java.lang.Object
implements javax.servlet.ServletContextListener

This class is capable of receiving notifications about the undeployment of a webapp, and responds by ensuring that commons-logging releases all memory associated with the undeployed webapp.

In general, the WeakHashtable support added in commons-logging release 1.1 ensures that logging classes do not hold references that prevent an undeployed webapp's memory from being garbage-collected even when multiple copies of commons-logging are deployed via multiple classloaders (a situation that earlier versions had problems with). However there are some rare cases where the WeakHashtable approach does not work; in these situations specifying this class as a listener for the web application will ensure that all references held by commons-logging are fully released.

To use this class, configure the webapp deployment descriptor to call this class on webapp undeploy; the contextDestroyed method will tell every accessable LogFactory class that the entry in its map for the current webapp's context classloader should be cleared.

从以下版本开始:

1.1

构造器概要

构造器

构造器和说明
ServletContextCleaner()

方法概要

限定符和类型	方法和说明
void	contextDestroyed(javax.servlet.ServletContextEvent sce) Invoked when a webapp is undeployed, this tells the LogFactory class to release any logging information related to the current contextClassloader.
void	contextInitialized(javax.servlet.ServletContextEvent sce) Invoked when a webapp is deployed.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ServletContextCleaner

public ServletContextCleaner()

方法详细资料

contextDestroyed

public void contextDestroyed(javax.servlet.ServletContextEvent sce)

Invoked when a webapp is undeployed, this tells the LogFactory class to release any logging information related to the current contextClassloader.

指定者:

contextDestroyed 在接口中 javax.servlet.ServletContextListener

contextInitialized

public void contextInitialized(javax.servlet.ServletContextEvent sce)

Invoked when a webapp is deployed. Nothing needs to be done here.

指定者:

contextInitialized 在接口中 javax.servlet.ServletContextListener