| KernelBundleClassLoader - Wiring problem? [message #1160108] |
Tue, 29 October 2013 00:49  |
 Douglas Beattie
Messages: 6
Registered: October 2013 |
Junior Member |
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I'm doing direct OAuth2 authentication to Salesforce.com using org.springframework.security.oauth2.client.OAuth2RestTemplate. Since the content type of retrieved data is JSON, I have to manually add an 'org.springframework.http.converter.json.MappingJacksonHttpMessageConverter', as
restTemplate.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
While my bundle 'erp.salesforce' directly declares imports for 'org.codehaus.jackson' and org.codehaus.jackson.map, the bundle will fail to start even when I deliberately start both jackson-core-asl-1.9.9.jar and jackson-mapper-asl-1.9.9.jar (which are of course valid OSGi bundles) before starting my application bundle.
Here is what the log output looks like (slightly trimmed for "other common frames"):
[2013-10-28 15:39:42.965] fs-watcher <HD0002E> Hot deploy failed for file 'erp.salesforce-1.0.0-SNAPSHOT.jar'. org.eclipse.virgo.nano.deployer.api.core.DeploymentException: BundleException
at org.eclipse.virgo.kernel.install.artifact.internal.bundle.StandardBundleDriver.startBundle(StandardBundleDriver.java:199)
... other common frames omitted
Caused by: org.osgi.framework.BundleException: Exception in com.mycompany.erp.salesforce.impl.Activator.start() of bundle com.mycompany.erp.salesforce.
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
... other common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/codehaus/jackson/JsonProcessingException
at com.mycompany.erp.salesforce.oauth2.AutomatedAccess.<init>(AutomatedAccess.java:66)
at com.mycompany.erp.salesforce.impl.Activator.tryAutomatedAccess(Activator.java:46)
at com.mycompany.erp.salesforce.impl.Activator.start(Activator.java:31)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
... 35 common frames omitted
Caused by: org.eclipse.virgo.kernel.osgi.framework.ExtendedClassNotFoundException: org.codehaus.jackson.JsonProcessingException in KernelBundleClassLoader: [bundle=org.springframework.web_3.1.0.RELEASE]
at org.eclipse.virgo.kernel.userregion.internal.equinox.KernelBundleClassLoader.loadClass(KernelBundleClassLoader.java:150)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 41 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.codehaus.jackson.JsonProcessingException
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:501)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at org.eclipse.virgo.kernel.userregion.internal.equinox.KernelBundleClassLoader.loadClass(KernelBundleClassLoader.java:146)
... 42 common frames omitted
Note in particular this piece of information:
ExtendedClassNotFoundException: org.codehaus.jackson.JsonProcessingException in KernelBundleClassLoader: [bundle=org.springframework.web_3.1.0.RELEASE]
Now, I was able to overcome this by modifying the ./configuration/java6-server.profile
by adding a couple lines, to declare these as "system" packages in the parent classloader.
org.osgi.framework.system.packages = \
org.codehaus.jackson,\
org.codehaus.jackson.map,\
and, the whole thing works beautifully -- but I think there must be a (probably simple) programmatic way to extend the classpath during Bundle activation. (I was a little surprised that the Virgo and Gemini wouldn't do this as-is.) Is this a fairly common problem, that injecting something into a Spring module requires classes outside the scope of its default wiring within the OSGi environment?
. . .
Douglas Beattie
www.linkedin.com/in/beattidp
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