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JBREFLECT-5 - Implementing generics in JavassistClassInfo
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reply from <a href="http://community.jboss.org/people/kabir.khan%40jboss.com">Kabir Khan</a> in <i>JBoss Microcontainer Development</i> - <a href="http://community.jboss.org/message/539484#539484">View the full discussion</a>
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<div class="jive-rendered-content"><p>Having revisited how the classpools are set up (<a class="jive-link-thread-small" href="http://community.jboss.org/thread/151095">http://community.jboss.org/thread/151095</a>) which became apparent after looking into (<a class="jive-link-message-small" href="http://community.jboss.org/message/538568#538568">http://community.jboss.org/message/538568#538568</a>) 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:</p><div> </div><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">
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...
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>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).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Parameterized type infos will need to be cached differently, I'll look at how these are handled in plain java across different classloaders.</p></div>
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