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  Quickly threadsafing odejava how to  (Read 859 times)
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Offline t_larkworthy

Senior Member


Medals: 1
Projects: 1


Google App Engine Rocks!


« Posted 2004-07-27 17:22:24 »

I am rapidly developing with odejava and I was getting crashes now and again. I feared it was my thread safety so I wanted to quickly fix this problem. Here is my quick and pretty cool solution using jboss's AOP.

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package testApp.aop;

import org.jboss.aop.advice.Interceptor;
import org.jboss.aop.joinpoint.Invocation;
import org.jboss.aop.joinpoint.MethodInvocation;

/**
 * Created by IntelliJ IDEA.
 * User: Tom
 * Date: 27-Jul-2004
 * Time: 19:51:41
 */

public class ThreadSafer implements Interceptor {
    public String getName() {
        return "testApp.aop.ThreadSafer";
    }

    public Object invoke(Invocation invocation) throws Throwable {
        try {
            MethodInvocation mi = (MethodInvocation) invocation;
            //System.out.println("<<< Entering MethodInterceptor for: " + mi.getMethod().toString());

            synchronized(this){
                return invocation.invokeNext();
            }
        } finally {
            //System.out.println(">>> Leaving MethodInterceptor");
       }
    }
}


and the configuration for that is

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<aop>
    <bind pointcut="execution(* org.odejava*->*(..))">
       <interceptor class="testApp.aop.ThreadSafer"/>
   </bind>
</aop>


And since doing that I have significantly reduced the amounts of non deterministic crashes I am getting from ode.

you can get AOP from jboss's website jboss.org

Runesketch: an Online CCG built on Google App Engine where players draw their cards and trade. Fight, draw or trade yourself to success.
Offline William Denniss

JGO Coder


Projects: 2


Fire at will


« Reply #1 - Posted 2004-07-27 22:34:09 »

nice one Smiley


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