SDO does not work with OSGi
---------------------------
Key: TUSCANY-1293
URL: https://issues.apache.org/jira/browse/TUSCANY-1293
Project: Tuscany
Issue Type: Bug
Components: Java SDO Implementation
Affects Versions: Java-SDO-beta1
Environment: OS X Eclipse 3.3 M7
Reporter: Bryan Hunt
Priority: Blocker
When I execute:
XSDHelper.INSTANCE.define(schema, null);
I end up with a NullPointerException. I've tracked down root cause ...
The static initializer of the HelperProvider executes this code:
provider = getInstance(HelperProvider.class.getClassLoader());
which ends up calling:
HelperProvider provider = loadImplementation(cl, implName);
implName is null so
if (implName == null) {
implName = getImplementationName(cl);
}
ends up calling
implName = getImplementationName(cl);
which ends up calling:
InputStream is = cl.getResourceAsStream(SERVICE_RESOURCE_NAME);
where SERVICE_RESORUCE_NAME =
"META-INF/services/commonj.sdo.impl.HelperProvider"
getResourceAsStream() return null because META-INF/services does not exist in
the API bundle. It exists in the IMPL bundle and since you are using the class
loader from the API bundle, it won't work.
You can set
-Dcommonj.sdo.impl.HelperProvider=org.apache.tuscany.sdo.helper.HelperProviderImpl
to get around the above problem, but as soon as
return (HelperProvider) cl.loadClass(implName).newInstance();
executes, you get a CalssNotFoundException. Again, this is because you are
trying to load a class outside the bundle with the wrong class loader.
tried modifying the API manifest by hand to add
Eclipse-BuddyPolicy: dependent
and
Eclipse-BuddyPolicy: global
Either of those buddy policies will get past the class loader problem (although
I believe this is specific to eclipse and won't work for OSGi in general), but
when HelperProvider is initializing, you get the following exception:
java.lang.ExceptionInInitializerError
at org.apache.tuscany.sdo.impl.AttributeImpl.<clinit>(AttributeImpl.java:126)
at
org.apache.tuscany.sdo.impl.SDOFactoryImpl.createAttribute(SDOFactoryImpl.java:239)
at org.apache.tuscany.sdo.impl.ClassImpl.<clinit>(ClassImpl.java:68)
at
org.apache.tuscany.sdo.impl.SDOFactoryImpl$SDOEcoreFactory.createEClass(SDOFactoryImpl.java:76)
at
org.apache.tuscany.sdo.impl.SDOPackageImpl.createEClass(SDOPackageImpl.java:622)
at
org.apache.tuscany.sdo.impl.SDOPackageImpl.createPackageContents(SDOPackageImpl.java:550)
at org.apache.tuscany.sdo.impl.SDOPackageImpl.init(SDOPackageImpl.java:259)
at org.apache.tuscany.sdo.SDOPackage.<clinit>(SDOPackage.java:76)
at sun.misc.Unsafe.ensureClassInitialized(Native Method)
at
sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:25)
at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:122)
at java.lang.reflect.Field.acquireFieldAccessor(Field.java:917)
at java.lang.reflect.Field.getFieldAccessor(Field.java:898)
at java.lang.reflect.Field.get(Field.java:357)
at org.apache.tuscany.sdo.util.SDOUtil.registerStaticTypes(SDOUtil.java:196)
at
org.apache.tuscany.sdo.model.impl.ModelFactoryImpl.init(ModelFactoryImpl.java:731)
at org.apache.tuscany.sdo.model.ModelFactory.<clinit>(ModelFactory.java:41)
at
org.apache.tuscany.sdo.helper.TypeHelperImpl.getBuiltInModels(TypeHelperImpl.java:61)
at org.apache.tuscany.sdo.helper.TypeHelperImpl.<init>(TypeHelperImpl.java:79)
at
org.apache.tuscany.sdo.helper.HelperContextImpl.<init>(HelperContextImpl.java:46)
at
org.apache.tuscany.sdo.helper.HelperProviderImpl.createDefaultHelpers(HelperProviderImpl.java:38)
at
org.apache.tuscany.sdo.rtlib.helper.HelperProviderBase.<init>(HelperProviderBase.java:78)
at
org.apache.tuscany.sdo.helper.HelperProviderImpl.<init>(HelperProviderImpl.java:31)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at java.lang.Class.newInstance0(Class.java:350)
at java.lang.Class.newInstance(Class.java:303)
at commonj.sdo.impl.HelperProvider.loadImplementation(HelperProvider.java:157)
at commonj.sdo.impl.HelperProvider.getInstance(HelperProvider.java:126)
at commonj.sdo.impl.HelperProvider.<clinit>(HelperProvider.java:69)
at commonj.sdo.helper.XSDHelper.<clinit>(XSDHelper.java:195)
at notification.sdo.Application.start(Application.java:23)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:497)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:436)
at org.eclipse.equinox.launcher.Main.run(Main.java:1162)
at org.eclipse.equinox.launcher.Main.main(Main.java:1137)
Caused by: java.lang.NullPointerException
at org.apache.tuscany.sdo.impl.AttributeImpl.eStaticClass(AttributeImpl.java:73)
at org.eclipse.emf.ecore.impl.EObjectImpl.eClass(EObjectImpl.java:224)
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eDynamicInverseAdd(BasicEObjectImpl.java:1413)
at
org.eclipse.emf.ecore.impl.EStructuralFeatureImpl.eInverseAdd(EStructuralFeatureImpl.java:514)
at
org.eclipse.emf.ecore.impl.BasicEObjectImpl.eInverseAdd(BasicEObjectImpl.java:1389)
at org.eclipse.emf.ecore.util.EcoreEList.inverseAdd(EcoreEList.java:282)
at
org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(NotifyingListImpl.java:318)
at org.eclipse.emf.common.util.BasicEList.add(BasicEList.java:626)
at
org.eclipse.emf.ecore.impl.EPackageImpl.createEAttribute(EPackageImpl.java:745)
at
org.apache.tuscany.sdo.impl.FactoryBase.createDocumentRoot(FactoryBase.java:301)
at org.apache.tuscany.sdo.impl.FactoryBase.initXSD(FactoryBase.java:156)
at
org.apache.tuscany.sdo.model.internal.impl.InternalFactoryImpl.createXSDMetaData(InternalFactoryImpl.java:211)
at
org.apache.tuscany.sdo.model.internal.impl.InternalFactoryImpl.initializeMetaData(InternalFactoryImpl.java:206)
at
org.apache.tuscany.sdo.model.internal.impl.InternalFactoryImpl.init(InternalFactoryImpl.java:172)
at
org.apache.tuscany.sdo.model.internal.InternalFactory.<clinit>(InternalFactory.java:41)
... 47 more
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