/*
* Copyright 2013, The Sporting Exchange Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.betfair.cougar.core.impl.kpi;
import com.betfair.cougar.core.api.ev.ExecutionObserver;
import com.betfair.tornjak.kpi.KPIMonitor;
import com.betfair.tornjak.kpi.KPITimer;
import com.betfair.tornjak.kpi.aop.KPIAsyncTimedEvent;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
/**
* Cougar-specific aspect which handles {@link KPIAsyncTimedEvent}-annotated methods. The methods must also have an
* argument of type {@link ExecutionObserver} in the last position. Method signatures on the generated
* async service interfaces match this pattern.
*/
@Aspect
public class KPIAsyncTimer {
private KPIMonitor monitor;
@Pointcut("@annotation(timer) && args(.., observer)")
private void cougarAsyncMethod(KPIAsyncTimedEvent timer, ExecutionObserver observer) {
}
@Around("cougarAsyncMethod(event, observer)")
public Object measureAsyncMethod(final ProceedingJoinPoint pjp, KPIAsyncTimedEvent event, ExecutionObserver observer) throws Throwable {
final String eventValue = event.value();
final String eventOperation = event.operation();
final String name = eventValue.isEmpty() ? pjp.getTarget().getClass().getSimpleName() : eventValue;
final String operation = eventOperation.isEmpty() ? pjp.getSignature().getName() : eventOperation;
final KPITimer timer = new KPITimer();
timer.start();
final PerformanceMonitoringExecutionObserver perfObserver =
new PerformanceMonitoringExecutionObserver(observer, monitor, timer,
event.catchFailures(), name, operation);
return pjp.proceed(replaceObserver(perfObserver, pjp.getArgs()));
}
private Object[] replaceObserver(PerformanceMonitoringExecutionObserver perfObserver, Object[] args) {
//As per the class javadocs, the ExecutionObserver must be the last element in the an the arg list
if (args != null &&
args.length > 0 &&
args[args.length-1] instanceof ExecutionObserver) {
args[args.length-1] = perfObserver;
}
return args;
}
public void setMonitor(KPIMonitor monitor) {
this.monitor = monitor;
}
}