I have no time just now to provide a "recipe", but you have several options:
- if() pointcut combined with config file or startup parameter specifying a
boolean checked by the pointcut. Advantage: dynamic, can be switched on for
production debugging on demand. Disadvantage: aspect code is part of your
deliverables in production.
- Adjust build job so code is not woven for production builds, only for
development builds. Advantage: no overhead in production. Disadvantages:
(small) one-time effort to adjust the build plan(s). Not dynamic.
- Load-time weaving (LTW): Do not weave your non-production aspects into the
production code at all, but only use it on demand via LTW (JVM start-up
parameter). Advantages: no code pollution, similar to option 2. Still flexible
if you need LTW on demand. Disadvantages: some overhead during application
start-up for LTW. You need to be able to influence the start parameters of the
target platform.
Now it is your choice. After having chosen, the "recipe" comes next. There is
no "one size fits all", you have options.
Alexander Kriegisch
Am 16.04.2013 um 15:09 schrieb Jean Andre <jean.an...@intact.net>:
> Good morning,
>
> I've dig into the mailing list without really finding what I'm looking for.
>
> I want a design pattern, clear, easy to understand by newbies and implement
> to enable or disable (weaving) an aspect during compile time. I saw that
> using @Aspect style is something different from the solution with no
> annotation (native style). As the product go to the production, I want to
> disable some aspect without removing the source code.
>
> As I do not to reinvent the wheel, I suppose that you already have the
> answer, a good one, not too far to the mouse'click ;)
>
> Thank you.
>
> Here is the aspect, we just calculate the elapsed time for particular calls
> and we log the result. Later we extract from log the result and we compute
> and draw graphics from the collected data.
>
> @Aspect
> @DeclarePrecedence("*,MonitorServiceBehavior")
> public class MonitorServiceBehavior extends LoggingBaseBehavior {
>
> @Pointcut("call(*
> com.nested.common.soa.client.services.interfaces.IClientService.*(..)) &&
> !within(com.nested.common.soa.client.services.impl.*)")
> public void elapsedSoaTimeMonitor() {};
>
> @Pointcut("execution(public * com.nested.crm.domain.services.impl.*.*(..))")
> public void elapsedServiceTimeMonitor() {};
>
> @Pointcut("call(public * com.nested.canada..service..*.*(..))")
> public void externalServiceTimeMonitor() {};
>
> @Pointcut("call(public * com.nested.canada..services..*.*(..))")
> public void commonApiServiceTimeMonitor() {};
>
> @Around(value = "(elapsedSoaTimeMonitor() || elapsedServiceTimeMonitor() ||
> externalServiceTimeMonitor() || commonApiServiceTimeMonitor()) && this(log)")
> public Object elapsedTimeMonitor(ProceedingJoinPoint pjp,
> JoinPoint.StaticPart jps, Loggable log) throws Throwable {
> long startTime = System.nanoTime();
> Object result = pjp.proceed();
> long elapsedTime = System.nanoTime() - startTime;
> log.getLog().info(jps.getSignature().getName() + " - elapsed time: "
> + elapsedTime + " - " + ((double)elapsedTime/1000000));
> return result;
> }
> }
>
>
>
> @Aspect
> public abstract class LoggingBaseBehavior {
>
> protected String buildParameters(Object[] parameters) {
> if (parameters == null) {
> return null;
> }
>
> StringBuilder sb = new StringBuilder();
> for (int i = 0; i< parameters.length; i++) {
> sb.append("Param")
> .append(i+1)
> .append(" : ")
> .append("'")
> .append(parameters[i])
> .append("'");
> if (i+1 < parameters.length) { sb.append(" - "); }
> }
> return sb.toString();
> }
>
> /*
> * The interface and the implementation of Loggable class.
> */
> public interface Loggable {
> Logger getLog();
> };
>
> public static class ServantLogger implements Loggable {
> private transient Logger log = null;
>
> public ServantLogger(Class<? extends Object> clazz) {
> this.log = LoggerFactory.getLogger(clazz);
> }
>
> @Override
> public Logger getLog() {
> return log;
> }
> }
> }
>
>
> Jean ANDRÉ
>
> _______________________________________________
> aspectj-users mailing list
> aspectj-users@eclipse.org
> https://dev.eclipse.org/mailman/listinfo/aspectj-users
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