[jboss-user] [JBoss Microcontainer Development] - JBREFLECT-5 - Implementing generics in JavassistClassInfo

[Kabir Khan]

Kabir Khan [http://community.jboss.org/people/kabir.khan%40jboss.com] replied to the discussion

"JBREFLECT-5 - Implementing generics in JavassistClassInfo"

To view the discussion, visit: http://community.jboss.org/message/539484#539484

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Having revisited how the classpools are set up ( http://community.jboss.org/thread/151095 http://community.jboss.org/thread/151095) which became apparent after looking into ( http://community.jboss.org/message/538568#538568 http://community.jboss.org/message/538568#538568) and fixed the problems to do with generating accessors for classes loaded by a parent of the jboss-reflect classloader I now end up with the following problems when starting AS:
 


Failed to boot JBoss:

java.lang.Exception: Encountered exception in server startup

at org.jboss.bootstrap.impl.mc.server.AbstractMCServerBase.bootstrapMcAndDescriptors(AbstractMCServerBase.java:360)

at org.jboss.bootstrap.impl.mc.server.AbstractMCServerBase.doStart(AbstractMCServerBase.java:292)

at org.jboss.bootstrap.impl.as.server.AbstractJBossASServerBase.doStart(AbstractJBossASServerBase.java:381)

at org.jboss.bootstrap.impl.base.server.AbstractServer$StartServerTask.run(AbstractServer.java:413)

at java.lang.Thread.run(Thread.java:637)

Caused by: org.jboss.xb.binding.JBossXBException: Failed to parse source: java.lang.IllegalStateException: java.lang.ClassNotFoundException: org.jboss.beans.metadata.spi.AnnotationMetaData

at org.jboss.kernel.plugins.deployment.AbstractKernelDeployment.annotations

at org.jboss.kernel.plugins.deployment.AbstractKernelDeployment

at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.parse(SaxJBossXBParser.java:195)

at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.parse(SaxJBossXBParser.java:175)

at org.jboss.xb.binding.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:161)

at org.jboss.bootstrap.impl.mc.deployer.TempBasicXMLDeployer.deploy(TempBasicXMLDeployer.java:188)

at org.jboss.bootstrap.impl.mc.server.AbstractMCServerBase.bootstrapMcAndDescriptors(AbstractMCServerBase.java:345)

... 4 more

Caused by: org.jboss.xb.binding.JBossXBRuntimeException: java.lang.IllegalStateException: java.lang.ClassNotFoundException: org.jboss.beans.metadata.spi.AnnotationMetaData

at org.jboss.kernel.plugins.deployment.AbstractKernelDeployment.annotations

at org.jboss.kernel.plugins.deployment.AbstractKernelDeployment

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.rethrowWithLocation(JBossXBNoSchemaBuilder.java:2293)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.createRootElementBinding(JBossXBNoSchemaBuilder.java:428)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.createRootElements(JBossXBNoSchemaBuilder.java:403)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.build(JBossXBNoSchemaBuilder.java:273)

at org.jboss.xb.builder.JBossXBBuilder.build(JBossXBBuilder.java:336)

at org.jboss.xb.builder.JBossXBBuilder.build(JBossXBBuilder.java:222)

at org.jboss.xb.builder.JBossXBBuilder.build(JBossXBBuilder.java:201)

at org.jboss.xb.binding.resolver.AbstractMutableSchemaResolver.resolve(AbstractMutableSchemaResolver.java:315)

at org.jboss.xb.binding.sunday.unmarshalling.SundayContentHandler.startElement(SundayContentHandler.java:177)

at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.startElement(SaxJBossXBParser.java:370)

at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)

at org.apache.xerces.xinclude.XIncludeHandler.startElement(Unknown Source)

at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)

at org.apache.xerces.impl.XMLNSDocumentScannerImpl$NSContentDispatcher.scanRootElementHook(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)

at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)

at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.parse(SaxJBossXBParser.java:191)

... 8 more

Caused by: java.lang.RuntimeException: java.lang.IllegalStateException: java.lang.ClassNotFoundException: org.jboss.beans.metadata.spi.AnnotationMetaData

at org.jboss.reflect.plugins.javassist.JavassistParameterizedClassInfo.findTypeInfo(JavassistParameterizedClassInfo.java:153)

at org.jboss.reflect.plugins.javassist.JavassistParameterizedClassInfo.getComponentType(JavassistParameterizedClassInfo.java:121)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.bindProperty(JBossXBNoSchemaBuilder.java:1447)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.generateType(JBossXBNoSchemaBuilder.java:1231)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.generateBean(JBossXBNoSchemaBuilder.java:855)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.generateBean(JBossXBNoSchemaBuilder.java:843)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.generateTypeBinding(JBossXBNoSchemaBuilder.java:604)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.resolveTypeBinding(JBossXBNoSchemaBuilder.java:563)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.createElementBinding(JBossXBNoSchemaBuilder.java:443)

at org.jboss.xb.builder.JBossXBNoSchemaBuilder.createRootElementBinding(JBossXBNoSchemaBuilder.java:423)

... 28 more

Caused by: java.lang.IllegalStateException: java.lang.ClassNotFoundException: org.jboss.beans.metadata.spi.AnnotationMetaData

at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.getTypeInfo(JavassistTypeInfoFactoryImpl.java:852)

at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.createTypeInfoForTypeArgument(JavassistTypeInfoFactoryImpl.java:910)

at org.jboss.reflect.plugins.javassist.JavassistParameterizedClassInfo.getActualTypeArguments(JavassistParameterizedClassInfo.java:110)

at org.jboss.reflect.plugins.javassist.JavassistParameterizedClassInfo.findTypeInfo(JavassistParameterizedClassInfo.java:149)

... 37 more

Caused by: java.lang.ClassNotFoundException: org.jboss.beans.metadata.spi.AnnotationMetaData

at java.net.URLClassLoader$1.run(URLClassLoader.java:200)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

at java.lang.ClassLoader.loadClass(ClassLoader.java:315)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330)

at java.lang.ClassLoader.loadClass(ClassLoader.java:250)

at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.delegateToIntrospectionImplementation(JavassistTypeInfoFactoryImpl.java:608)

at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.get(JavassistTypeInfoFactoryImpl.java:564)

at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.get(JavassistTypeInfoFactoryImpl.java:455)

at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.get(JavassistTypeInfoFactoryImpl.java:412)

at org.jboss.reflect.plugins.javassist.JavassistTypeInfoFactoryImpl.getTypeInfo(JavassistTypeInfoFactoryImpl.java:848)

... 40 more

Posting Shutdown Request to the server...


The problem here is for parameterized type infos. We currently use the type info of the raw type for the whole parameterized type which will not work for things like java.util.Set<org.jboss.beans.metadata.spi.AnnotationMetaData> since the raw type (Set) comes from the system classpath and thus cannot see the actual type argument classes (AnnotationMetaData is further down in the classloader hierarchy).

Parameterized type infos will need to be cached differently, I'll look at how these are handled in plain java across different classloaders.

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