I am attempting to run an Eclipse 3.x application using Equinox in Neon as initiated in this question.
It appears that my remaining issue is that the LogReaderService appears to not be available, as the second line below in org.eclipse.core.internal.runtime.InternalPlatform.getLog() appears to throw a NullPointerException:
ExtendedLogReaderService logReader = logReaderTracker.getService();
logReader.addLogListener(result, result);
An implementation of this class can be found in org.eclipse.osgi, which I am launching the application with. For whatever reason, though, the service is null, which causes a number of plug-ins to throw exceptions when logging since many of the plug-ins rely on getting the Logging service from the Activator.
Since org.eclipse.osgi contains the implementation in its internals, I assumed that it would also register the service. That does not appear to be the case. I have also tried including log4j and org.apache.felix.log and neither appear to resolve this problem.
There must be something simple that is missing here to get the LogService to start? Here's the stack trace:
Caused by: java.lang.ClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.core.resources (44).
at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:116)
at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:529)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:325)
at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:345)
at org.eclipse.osgi.internal.loader.sources.SingleSourcePackage.loadClass(SingleSourcePackage.java:36)
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:419)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:372)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:364)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 20 more
Caused by: org.osgi.framework.BundleException: Exception in org.eclipse.core.resources.ResourcesPlugin.start() of bundle org.eclipse.core.resources.
at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:795)
at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:724)
at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:932)
at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:309)
at org.eclipse.osgi.container.Module.doStart(Module.java:581)
at org.eclipse.osgi.container.Module.start(Module.java:449)
at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:470)
at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)
... 29 more
Caused by: java.lang.NullPointerException
at org.eclipse.core.internal.runtime.InternalPlatform.getLog(InternalPlatform.java:353)
at org.eclipse.core.runtime.Platform.getLog(Platform.java:976)
at org.eclipse.core.internal.utils.Policy.log(Policy.java:159)
at org.eclipse.core.internal.resources.Workspace.setCrashed(Workspace.java:2302)
at org.eclipse.core.internal.resources.SaveManager.restoreSnapshots(SaveManager.java:963)
at org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:720)
at org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1587)
at org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2399)
at org.eclipse.core.internal.resources.Workspace.open(Workspace.java:2156)
at org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:464)
at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:774)
at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:767)
... 36 more
I also added
Require-Capability: osgi.service;filter:="(objectClass=org.osgi.service.log.LogService)";effective:=active
To one of the dependent bnd files. This did not appear to solve the problem.
Edit: Because the OSGI Framework is set to org.eclipse.osgi in the bndrun file, is that preventing the logging from getting initialized? I have also tried adding org.apache.commons.logging as well as osgi.enroute.equinox.log.adapter and I am still getting NPEs when anything attempts to log. The org.eclipse.osgi bundle is already considered running by the time the RCP plugins get activated... yet there is no ExtendedLogReaderService. Do I need to find a way to install Felix as the Core Runtime in order to make org.eclipse.osgi able to get started by the framework in order for the ExtendedLogReaderServiceImpl to get registered?
I have found numerous examples of how to listen for the LogService... I'm not seeing how to start the ExtendedLogService.
Edit 2: I am able to suppress the
LogService nulls issue by registering dummy ExtendedLogService implementations.