Simplest Possible EJB 3.1 Interceptor - If You Love XML

Annotations are great, but sometimes it is necessary to disable an interceptor without being forced to recompile your code. In EJB 3.0/1 you can completely get rid off annotations and configure everything in XML (what was awesome in 2000 :-)). The XML-configuration is very similar to the declaration of Servlet-Filters: you have to declare the Interceptor first, and then you can associate it with an EJB 3.1:

<ejb-jar xmlns="" version="3.0" xmlns:xsi="" xsi:schemalocation="">

The EJB comes without the @Interceptors tag. The XML configuration would override it anyway. This behavior is useful and generally applied in EJB 3 - land. You can override annotations with XML, what is especially interesting for testing.

public class HelloBean implements Hello {

    public String sayHello() {
        return "Hello from Session Bean";
...and the interceptor knows nothing about XML:

public class PerformanceMeasurement {

    public Object trace(InvocationContext invocationContext) throws Exception{
        long start = System.nanoTime();
            return invocationContext.proceed();
            long executionTime = (System.nanoTime() - start);
            System.out.println("Method: " + invocationContext.getMethod() + " executed in: " + executionTime + " ns");

You will find the whole project in:

[I used the sample to explain some EJB 3.1/3.0 principles in the "Real World Java EE Patterns" book as well.]

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Hi Adam,

you mentioned, that one can disable a "per-annotation" defined Interceptor in XML, but your example binds an interceptor to a bean too.

Could you provide an example that disables an interceptor via xml?


Posted by Robert on July 21, 2009 at 03:43 PM CEST #

Is it possible to define an "interceptor chain" composed of one or more interceptors and then bind this interceptor chain to a group of EJBs defined with a pattern, for instance "com.mycompany.myproject.*.*SessionBean"

Posted by Gérald on July 21, 2009 at 06:08 PM CEST #

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