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From Rolf Schäuble (Created) (JIRA) <j...@apache.org>
Subject [jira] [Created] (CXF-3959) CXF JAX-WS: @PostConstruct methods invoked twice in Spring-based projects
Date Tue, 06 Dec 2011 15:11:40 GMT
CXF JAX-WS: @PostConstruct methods invoked twice in Spring-based projects
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                 Key: CXF-3959
                 URL: https://issues.apache.org/jira/browse/CXF-3959
             Project: CXF
          Issue Type: Bug
          Components: JAX-WS Runtime
    Affects Versions: 2.5, 2.4.2
            Reporter: Rolf Schäuble
         Attachments: cxf-postconstruct-bug.zip

Under the following circumstances, @PostConstruct methods on classes exported as JAX-WS WebService
are invoked twice:
- The application uses Spring as IoC container
- Spring's support for JSR 250 annotations is active (using the CommonAnnotationBeanPostProcessor
bean or <context:annotation-config/>
- The exported bean is declared as Spring bean in the application context
- The <jaxws:endpoint> declaration refers to the declared bean (<jaxws:endpoint implementor="#beanName"/>

The last point is important:
- <jaxws:endpoint implementor="the.bean.class.name"/> *does not* not show the wrong
behavior
- <bean id="theBean" class="the.bean.class.name"/>
  <jaxws:endpoint implementor="#theBean'"/> *does* show the wrong behaviur
  
I have built an example application (based on CXF's java_first_spring_support sample) that
shows the problem. It contains two classes:
1. PostConstructCalledOnce: this class is exported using the <jaxws:endpoint implementor="the.bean.class.name"/>
synxtax
2. PostConstructCalledTwice.java: this class is exported using the <jaxws:endpoint implementor="#theBean'"/>

Both classes contain a postConstruct method; both method print the class's name to the console.
When the application is started ("mvn -Pserver"), it can be observed that PostConstructCalledOnce#postConstruct
is called once and PostConstructCalledTwice#postConstruct is called twice.

Desired behavior: both postConstruct methods should only be invoked once.

Workaround:
1. Annotate the affected classes with CXF's @NoJSR250Annotations annotation
2. Use the <jaxws:endpoint implementor="the.bean.class.name"/> syntax. Problem: This
way, Spring is not able to wrap the bean with a proxy (e.g. for transaction support)

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