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
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