Issue dev'ing RESTful JSON services on NetBeans

Here is a tricky issue that you may find if you are developing RESTful services with Java EE on NetBeans and GlassFish or WebLogic. If you want to support the JSON format but need to access some implementation classes like @JsonIgnore, you need to add the JAX-RS RI, Jersey, to your project's Libraries definition. How to add the RI? You will probably do this:

  1. Open project's Properties (right click on the project)
  2. Go to Libraries
  3. Click on 'Add Library'
  4. Select 'Jersey 1.8 (JAX-RS RI)

But you won't have your service running fine. You may find these exceptions: (added here so Google can help future users)

1 - If you try to access your RESTful service to get a JSON format of it, you will get this exception:

com.sun.jersey.spi.inject.Errors$ErrorMessagesException
  at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
  at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)
at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)

2 - If you try to access your RESTful service to get an XML format, you will get this exception:

java.lang.RuntimeException: javax.naming.NameNotFoundException: Unable to resolve 'com.sun.jersey.config.CDIExtension'. Resolved 'com.sun.jersey.config'; remaining name 'CDIExtension'
  at com.sun.jersey.server.impl.cdi.CDIExtension.getInitializedExtension(CDIExtension.java:177)
  at com.sun.jersey.server.impl.cdi.CDIComponentProviderFactory.(CDIComponentProviderFactory.java:92)
  at com.sun.jersey.server.impl.cdi.CDIComponentProviderFactoryInitializer.initialize(CDIComponentProviderFactoryInitializer.java:75)
  at com.sun.jersey.spi.container.servlet.WebComponent.configure(WebComponent.java:576)
  at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.configure(ServletContainer.java:311)

 If you look at your server's log, (in my case, I was using WebLogic 12c) you may find this message somewhere:

WARNING: 
**********
The application is using ServletContainerInitializer class com.sun.jersey.server.impl.container.servlet.JerseyServletContainerInitializer that is loaded from:file:/labs/wls1211/modules/com.sun.jersey.server_1.1.0.0_1-9.jar. This initializer overrides the one available in the system.
**********

When you added Jersey to your library, the "package" checkbox was checked by default. So the JAR ended up going into WEB-INF/lib of your project, conflicting to the already provided by the container. 

So, how to fix this issue? Follow these steps:

  1. Open project's Properties (right click on the project)
  2. Go to Libraries
  3. Uncheck the checkbox 'Package' for Jersey 1.8 (JAX-RS RI)
  4. Click on 'OK'
  5.  Clean & Build (right click on the project) ---> remember to clean and rebuild your project
  6. (re)Deploy application

Done! :_)

 

Comments:

Thanks

Posted by guest on June 19, 2013 at 05:01 AM PDT #

Thanks

Posted by guest on June 19, 2013 at 05:44 AM PDT #

Hi,

it seems a similar problem pops up not during deployment but when accessing a REST service on weblogic 12.1.1. It also affects other containers it seems and there is a temporary work-around see: https://java.net/jira/browse/JERSEY-601

No idea if it is solved on the recently released weblogic 12.1.2 but will be checking soon. The above mentioned workaround did the job for weblogic 12.1.1 :-)

Posted by guest on July 13, 2013 at 05:25 PM PDT #

The solution we have used is the one where we set in the JVM system property at startup (Set in setWLEnv.sh)

-Dcom.sun.jersey.server.impl.cdi.lookupExtensionInBeanManager=true

This resolves the issue perfectly.

Posted by guest on September 17, 2013 at 12:31 AM PDT #

set the following System Parameter (We set ours in setWLEnv.sh)

-Dcom.sun.jersey.server.impl.cdi.lookupExtensionInBeanManager=true

It resolved all the issues.

Posted by guest on September 17, 2013 at 12:32 AM PDT #

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Bruno has been having fun working with Java since 2000 and now helps Oracle on sharing the technology accross all Latin America. Also plays videogames, does trekking and loves beer.

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