OSGi Homework Problem

[Henry Suryawirawan]

Hi all,

I am stucked up with this problem for my homework. Since I'm quite new to OSGi, probably someone could help me pointing out the missing link.

Basically, for the homework, I created examples.services.api.MyComputeService with implementation examples.services.impl.MyComputeServiceImpl.

I've also created mycomputeservice.xml in OSGI-INF directory and name the component "decl-service-2".

MANIFEST.MF has also been updated to include the new mycomputeservice.xml file.

However, when I try to inject the MyComputeService in my servlet using @Resource(mappedName = "decl-service-2"), it prompts me with exception.

Here is the stack trace:

WARNING: StandardWrapperValve[HelloWorld]: PWC1382: Allocate exception for servlet HelloWorld

com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class examples.services.webclient.HelloWorld

        at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.createManagedObject(InjectionManagerImpl.java:312)

        at com.sun.enterprise.web.WebContainer.createServletInstance(WebContainer.java:700)

        at com.sun.enterprise.web.WebModule.createServletInstance(WebModule.java:1937)

        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1252)

        at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:1059)

        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:187)

        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)

        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)

        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)

        at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)

        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)

        at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:332)

        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:233)

        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)

        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)

        at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)

        at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)

        at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)

        at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)

        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)

        at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)

        at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)

        at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)

        at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)

        at com.sun.grizzly.ContextTask.run(ContextTask.java:69)

        at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)

        at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)

        at java.lang.Thread.run(Thread.java:619)

Caused by: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Env-Prop: examples.services.webclient.HelloWorld/myComputeService@Field-Injectable Resource. Class name = examples.services.webclient.HelloWorld Field name=myComput...@java.lang.String@@@ into class examples.services.webclient.HelloWorld

        at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:614)

        at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:384)

        at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectInstance(InjectionManagerImpl.java:141)

        at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectInstance(InjectionManagerImpl.java:127)

        at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.createManagedObject(InjectionManagerImpl.java:306)

        ... 27 more

Caused by: java.lang.IllegalArgumentException: Can not set examples.services.api.MyComputeService field examples.services.webclient.HelloWorld.myComputeService to examples.services.impl.MyComputeServiceImpl

        at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146)

        at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:150)

        at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63)

        at java.lang.reflect.Field.set(Field.java:657)

        at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:565)

        ... 31 more

[Henry Suryawirawan]

I managed to solve the problem by rebuilding the two projects, undeploy the previous module deployment from glassfish, restart the glassfish, and redeploy the new modules.