Arjan Seijkens created WINK-433:
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Summary: wink-providers not registered when running apache wink in
osgi bundle on j2ee environment
Key: WINK-433
URL: https://issues.apache.org/jira/browse/WINK-433
Project: Wink
Issue Type: Bug
Components: Common
Affects Versions: 1.4
Environment: Windows 7, WebSphere Application Server 8.5.5.5
Reporter: Arjan Seijkens
I Have a WebSphere Application Server 8.5.5.5 on which I deploy my application
which contains an OSGi bundle which contains the wink-server and wink-common
libraries.
When starting the application (and the bundle) all default
MessageBodyReaderProviders and MessageBodyWriterProviders as listed in the
wink-providers file, which are part of the wink-common.jar are registered. All
classes in that file are loaded by the
org.apache.wink.common.internal.utils.ClassUtils#loadClass(String) method and
then checked to see if they represent a Provider, by checking if they are
annotated with the javax.ws.rs.ext.Provider class. All these classes are part
of the webmanager-jaxrssupport-bundle and available on its own contained
classloader.
This causes problems in WebSphere, because both the javax.ws.rs.ext.Provider
class and the classes listed in the wink-providers file are also available on
the thread context classloader and the
org.apache.wink.common.internal.utils.ClassUtils#loadClass(String) method first
checks that classloader when loading classes.
As a result the loaded class will be annotated with a javax.ws.rs.ext.Provider
class from the thread context classloader and the logic which checks if it is
annotated check against a javax.ws.rs.ext.Provider class from the current
classloader (webmanager-jaxrssupport-bundle's own contained classloader) and
thus doesn't recognize the class as a Provider class and doesn't register it.
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