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Log4jConfigServlet (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

The Spring Framework

org.springframework.web.util
Class Log4jConfigServlet

java.lang.Object
  extended by javax.servlet.GenericServlet
      extended by javax.servlet.http.HttpServlet
          extended by org.springframework.web.util.Log4jConfigServlet
All Implemented Interfaces:
Serializable, Servlet, ServletConfig

public class Log4jConfigServlet
extends HttpServlet

Bootstrap servlet for custom Log4J initialization in a web environment. Delegates to Log4jWebConfigurer (see its javadoc for configuration details). WARNING: Assumes an expanded WAR file, both for loading the configuration file and for writing the log files. If you want to keep your WAR unexpanded or don't need application-specific log files within the WAR directory, don't use Log4J setup within the application (thus, don't use Log4jConfigListener or Log4jConfigServlet). Instead, use a global, VM-wide Log4J setup (for example, in JBoss) or JDK 1.4's java.util.logging (which is global too).

Note: This servlet should have a lower load-on-startup value in web.xml than ContextLoaderServlet, when using custom Log4J initialization.

Note that this class has been deprecated for containers implementing Servlet API 2.4 or higher, in favor of Log4jConfigListener.
According to Servlet 2.4, listeners must be initialized before load-on-startup servlets. Many Servlet 2.3 containers already enforce this behavior (see ContextLoaderServlet javadocs for details). If you use such a container, this servlet can be replaced with Log4jConfigListener. Else or if working with a Servlet 2.2 container, stick with this servlet.

Since:
12.08.2003
Author:
Juergen Hoeller, Darren Davison
See Also:
Log4jWebConfigurer, Log4jConfigListener, ContextLoaderServlet, Serialized Form

Constructor Summary
Log4jConfigServlet()
           
 
Method Summary
 void destroy()
           
 String getServletInfo()
           
 void init()
           
 void service(HttpServletRequest request, HttpServletResponse response)
          This should never even be called since no mapping to this servlet should ever be created in web.xml.
 
Methods inherited from class javax.servlet.http.HttpServlet
doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service
 
Methods inherited from class javax.servlet.GenericServlet
getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletName, init, log, log
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Log4jConfigServlet

public Log4jConfigServlet()
Method Detail

init

public void init()
Overrides:
init in class GenericServlet

destroy

public void destroy()
Specified by:
destroy in interface Servlet
Overrides:
destroy in class GenericServlet

service

public void service(HttpServletRequest request,
                    HttpServletResponse response)
             throws IOException
This should never even be called since no mapping to this servlet should ever be created in web.xml. That's why a correctly invoked Servlet 2.3 listener is much more appropriate for initialization work ;-)

Overrides:
service in class HttpServlet
Throws:
IOException

getServletInfo

public String getServletInfo()
Specified by:
getServletInfo in interface Servlet
Overrides:
getServletInfo in class GenericServlet

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