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59 lines
1.7 KiB
Java
59 lines
1.7 KiB
Java
Delegate filter
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package com.ack.web.servlet;
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import java.io.IOException;
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import javax.servlet.Filter;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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/*
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to configure this filter display every request uri and the time taken
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to complete it. Compile this class into the WEB-INF/classes directory
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and configure you WEB-INF/web.xml file to include the following filter.
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Note how you can map the filter onto any url-pattern of your choosing.
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<web-app>
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<filter>
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<filter-name>requesttimerfilter</filter-name>
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<filter-class>com.ack.web.servlet.RequestTimerFilter</filter-class>
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</filter>
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<filter-mapping>
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<filter-name>requesttimerfilter</filter-name>
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<url-pattern>/*</url-pattern>
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</filter-mapping>
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</web-app>
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*/
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public class DelegateFilter extends HttpServlet implements Filter {
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private FilterConfig filterConfig;
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public void init( FilterConfig filterConfig ) {
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this.filterConfig = filterConfig;
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}
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public void doFilter( ServletRequest request,
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ServletResponse response,
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FilterChain filterChain ) {
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try {
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String requestURI = ( (HttpServletRequest) request ).getRequestURI();
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System.out.println( "delegating to -> " + requestURI );
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filterChain.doFilter( request, response );
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}
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catch( ServletException sx ) {
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log( sx.getMessage() );
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}
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catch( IOException iox ) {
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log( iox.getMessage() );
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}
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}
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}
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