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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