| load time weaving with existing servlet [message #590300] |
Wed, 05 October 2005 16:24 |
Eclipse User |
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Originally posted by: drinkevich.hotmail.com
I am trying to add an aspect to an existing servlet; where the servlet does
not know about the aspect in advance (i.e. it's already deployed) (Note: I
was able to make this work if I created an eclipse project and put them in
the same project prior to building my war file)
I created a simple Hello World servlet (hwservlet) and deployed that war
file to Tomcat. (5.5 using 1.5)
I then created an aspect HttpServletMonitor to listen to the doGet method.
(code below)
I placed
- HttpServletMonitor.class file in hwservlet\web-inf\classes
- aop.xml in hwservlet\META-INF (file below)
- Added aspectj.jar and aspectjweaver.jar to Tomcat's classpath
-Dclasspath=c:\aspectj1.5\lib\aspectjrt.jar;c:\aspectj1.5\li b\aspectweaver.jar
Added the javaagent parameter to tomcat:
-Djavaagent=c:\aspect1.5\lib\aspectjweaver.jar
I restart Tomcat ... the HelloWorld servlet still works just file but the
aspect is not executed. If I run Tomcat through Eclipse in debug mode, I can
hit a breakpoint in the servlet, but not the aspect.
What have I missed?
Thanks
Debbie
*****
public aspect HttpServletMonitor {
/** Execution of any 'do' Servlet request methods. */
public pointcut monitoredOperation(Object operation) :
execution(void HttpServlet.do*(..)) && this(operation);
/** Advice that records statistics for each monitored operation. */
void around(Object operation) : monitoredOperation(operation) {
String threadId = Thread.currentThread().getName();
proceed(operation);
}
private void writeLog(){
// write a temp file to disk
}
public HttpServletMonitor(){ }
}
***
<aspectj>
<aspects>
<!-- declare existing aspects to the weaver -->
<aspect name="HttpServletMonitor"/>
</aspects>
<weaver options="-verbose -XlazyTjp">
<include within="HWServlet"/>
</weaver>
</aspectj>
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