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info.crossbar.filtersAndListeners
Class ContextListener  

java.lang.Object
  info.crossbar.filtersAndListeners.ContextListener

All Implemented Interfaces:

java.util.EventListener, javax.servlet.ServletContextListener

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public class ContextListener

extends java.lang.Object

implements javax.servlet.ServletContextListener

ContextListener class for use by Crossbar

Version:

View source, revision history $Revision: 1.4 $ $Date: 2003/06/21 00:42:13 $

DESCRIPTION: An application lifecycle event listener that executes when the servlet context is created and destroyed. Sets up logging for the application and initializes any classes needed throughout the application.

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Constructor Summary

ContextListener()

 

Method Summary
void	contextDestroyed(javax.servlet.ServletContextEvent sce)           Notification that the servlet context is about to be shut down.
void	contextInitialized(javax.servlet.ServletContextEvent sce)           Notification that the web application initialization process is starting.
protected static java.lang.String	getLogFilePath(javax.servlet.ServletContext context)           Utility method returns a path to a servlet.log file.
protected static java.lang.String	getPackageParent(javax.servlet.ServletContext context)           Utility method returns "info.crossbar" or something similar.
static java.util.logging.Logger	setLogging(javax.servlet.ServletContext context)           Set up logging for the application.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

ContextListener

public ContextListener()

Method Detail

contextInitialized

public void contextInitialized(javax.servlet.ServletContextEvent sce)

Description copied from interface: javax.servlet.ServletContextListener

Notification that the web application initialization process is starting. All ServletContextListeners are notified of context initialization before any filter or servlet in the web application is initialized.

Specified by:

contextInitialized in interface javax.servlet.ServletContextListener

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setLogging

public static java.util.logging.Logger setLogging(javax.servlet.ServletContext context)
                                           throws javax.servlet.ServletException

Set up logging for the application. Logging properties are set here for use throughout the application. Uses the Java Logging API.

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getLogFilePath

protected static java.lang.String getLogFilePath(javax.servlet.ServletContext context)
                                          throws javax.servlet.ServletException,
                                                 java.io.IOException

Utility method returns a path to a servlet.log file.

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getPackageParent

protected static java.lang.String getPackageParent(javax.servlet.ServletContext context)
                                            throws javax.servlet.ServletException

Utility method returns "info.crossbar" or something similar. Easy to override in derived applications. Used to set the java.util.logging.Logger object to be the parent of all subsequent loggers in the application.

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contextDestroyed

public void contextDestroyed(javax.servlet.ServletContextEvent sce)

Description copied from interface: javax.servlet.ServletContextListener

Notification that the servlet context is about to be shut down. All servlets and filters have been destroy()ed before any ServletContextListeners are notified of context destruction.

Specified by:

contextDestroyed in interface javax.servlet.ServletContextListener

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