Adam Bien's Weblog
Tuesday Dec 13, 2011
What Is The @Interceptors Overhead?
The RESTful EJB 3.1 InterceptedHelloService:
@Path("intercepted")
@Interceptors({LoggingInterceptor.class,AnotherInterceptor.class})
@Stateless
@Produces(MediaType.TEXT_PLAIN)
public class InterceptedHelloService {
@GET
public String call(){
return System.currentTimeMillis() + " ";
}
}
is intercepted with two, empty, interceptors:
public class AnotherInterceptor {
@AroundInvoke
public Object intercept(InvocationContext ic) throws Exception{
return ic.proceed();
}
}
public class LoggingInterceptor {
@AroundInvoke
public Object intercept(InvocationContext ic) throws Exception{
return ic.proceed();
}
}
The execution overhead is compared to a plain EJB 3.1 without any interception:
@Path("plain")
@Stateless
@Produces(MediaType.TEXT_PLAIN)
public class PlainHelloService {
@GET
public String call(){
return System.currentTimeMillis() + " ";
}
}
…and the results are:
| Type | Average | Min | Max | Transactions/Sec |
|---|---|---|---|---|
| Plain EJB 3.1 | 1 | 0 | 8 | 2833.66 |
| Intercepted EJB 3.1 | 1 | 0 | 9 | 2818.88 |
Posted at 11:49AM Dec 13, 2011 by Adam Bien in Real World Java EE Patterns - Rethinking Best Practices | Comments[5] | Views/Hits: 1490
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I assume you did the load test with JMeter issuing HTTP GET. Then the majority of the time will be spent in the network stack and HTTP protocol. Considering this the overhead is small. If you compare just the method call you will find a significant performance impact. That is why I would not recommend these approaches for domain objects for example that are called much more frequently. For transactions, security, services and coarse grained objects the approach is fine, of course.
Posted by Eberhard Wolff on December 13, 2011 at 12:24 PM CET #
Adam, is it not possible that a good compiler/runtime could recognise that there is no body in the interceptor and thus remove it.
Bought the two books last month; very impressive.
Posted by Steve Lindsey on December 13, 2011 at 12:33 PM CET #
Some time ago I did Interceptor benchmark (Weld, EJB and no interceptor).
The results:
https://issues.jboss.org/brows/WELD-864
Posted by wojtask9 on December 19, 2011 at 01:42 PM CET #
wojtask9, your link is broken.
Posted by Anton Lisovenko on December 20, 2011 at 10:52 PM CET #
sorry.
https://issues.jboss.org/browse/WELD-864
i missed one letter :/
Posted by wojtask9 on December 23, 2011 at 01:02 AM CET #