[CXF-3959] CXF JAX-WS: @PostConstruct methods invoked twice in Spring-based projects

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.2, 2.5
• Fix Version/s: 2.4.5, 2.5.1
• Component/s: JAX-WS Runtime
• Estimated Complexity: Unknown
• Assignee: Daniel Kulp
• Reporter: Rolf Schäuble
• Created: 06/Dec/11 15:09
• Updated: 01/Mar/22 03:24
• Resolved: 07/Dec/11 16:58

Description

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)

Issue Links

• is broken by: CXF-8666 Spring6 for JSR 250 annotations isn't disabled for jakarta.xml.ws.WebServiceContext