Timer Interceptor in Mule part 2
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This document describes how to use a custom interceptor in Mule to calculate the total time taken for a flow to execute. The custom interceptor class extends AbstractInterceptingMessageProcessor and implements Interceptor. It uses System.currentTimeMillis() to record the start and end time of a flow's execution and logs the difference, which is the total execution time. Using this interceptor, the execution time of a sample complex web service flow is logged both when it hits the database and when it uses a cache.
![And our java class TimerInterceptor will be:-
public class TimerInterceptor extends AbstractInterceptingMessageProcessor
implements Interceptor {
private static Log logger = LogFactory.getLog(TimerInterceptor.class);
public MuleEvent process(MuleEvent event) throws MuleException {
long startTime = System.currentTimeMillis();
MuleEvent resultEvent = processNext(event);
if (logger.isInfoEnabled()) {
long executionTime = System.currentTimeMillis() - startTime;
logger.info("Custom Timer : "+resultEvent.getFlowConstruct().getName() + " took "
+ executionTime + "ms to process event ["
+ resultEvent.getId() + "]");
}
return resultEvent;
}
}](https://image.slidesharecdn.com/timerinterceptorinmulepart2-150327122440-conversion-gate01/85/Timer-Interceptor-in-Mule-part-2-8-320.jpg)
Timer Interceptor in Mule part 2
- 1. By Anirban Sen Chowdhary
- 3. .
- 4. Here I will show you how ……
- 5. We can use a Mule component called custom-interceptor in our flow With this we can calculate the total amount of time taken in our flow
- 6. So, we can take following Mule flow to demonstrate :-
- 7. So, we can use the following tag in our flow of our Mule config to execute total time:- <custom-interceptor class="com.customInterceptor.TimerInterceptor" />
- 8. And our java class TimerInterceptor will be:- public class TimerInterceptor extends AbstractInterceptingMessageProcessor implements Interceptor { private static Log logger = LogFactory.getLog(TimerInterceptor.class); public MuleEvent process(MuleEvent event) throws MuleException { long startTime = System.currentTimeMillis(); MuleEvent resultEvent = processNext(event); if (logger.isInfoEnabled()) { long executionTime = System.currentTimeMillis() - startTime; logger.info("Custom Timer : "+resultEvent.getFlowConstruct().getName() + " took " + executionTime + "ms to process event [" + resultEvent.getId() + "]"); } return resultEvent; } }
- 9. Now this is a complex web service that uses cache mechanism in the flow and will fetch some data from the database Now when we execute this flow, we will get the above in our console
- 10. Now since this flow uses a cache mechanism in the flow, if we hit the service again , it will uses cache to fetch it’s data and it will not hit the actual database. So, in this case the execution time will be less as follow :- Now when we execute this flow, we will get the above in our console
- 11. So, this is very simple, we just need to put the following code in our flow to get the execution time:- <custom-interceptor> with your own java class to calculate the execution time
- 12. Hope you enjoyed the simple yet an amazing trick in Mule