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Problem registering service [message #676965]

Tue, 07 June 2011 06:26

Barbara Rosi-Schwartz

Messages: 448
Registered: July 2009

Senior Member

Hello.

I am trying to register this OSGi service via Spring DM:

<bean id="bundleInspector"   class="com.iggroup.administrator.business.internal.BundleInspector">
      <property name="bundleContext" ref="bundleContext" />
</bean>

<osgi:service id="bundleInspector" ref="bundleInspector"
      interface="com.iggroup.administrator.api.business.BundleService"/>

where BundleInspector implements BundleService.

However I get the exception below. Any idea what I may be doing wrong?

TIA,
B.

[2011-06-07 07:13:23.291] region-dm-3                  <AG0000E> Application context creation failure for bundle 'com.iggroup.administrator.business' version '0.0.1.SNAPSHOT'. org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'bundleInspector': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Exported service object does not implement the given interface: interface org.osgi.framework.ServiceRegistration is not assignable to interface com.iggroup.administrator.api.business.BundleService
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1420)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:563)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
	at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access$1600(AbstractDelegatedExecutionApplicationContext.java:69)
	at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext$4.run(AbstractDelegatedExecutionApplicationContext.java:355)
	at org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)
	at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:320)
	at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:132)
	at org.eclipse.virgo.kernel.agent.dm.ContextPropagatingTaskExecutor$2.run(ContextPropagatingTaskExecutor.java:95)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.IllegalArgumentException: Exported service object does not implement the given interface: interface org.osgi.framework.ServiceRegistration is not assignable to interface com.iggroup.administrator.api.business.BundleService
	at org.springframework.util.Assert.isAssignable(Assert.java:368)
	at org.springframework.osgi.service.exporter.support.OsgiServiceFactoryBean.afterPropertiesSet(OsgiServiceFactoryBean.java:197)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417)
	... 17 common frames omitted

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Re: Problem registering service [message #676988 is a reply to message #676965]

Tue, 07 June 2011 08:05

Barbara Rosi-Schwartz

Messages: 448
Registered: July 2009

Senior Member

Found my problem (I need to sleep more... Sad

I was using the "id" attribute in the <osgi:service> element, which is wrong. Removing that attribute fixed my issues -- cryptic exception though!

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Re: Problem registering service [message #677149 is a reply to message #676965]

Tue, 07 June 2011 17:54

Costin Leau

Messages: 45
Registered: February 2010

Member

The problem comes from the fact that the service references itself (this can work in advanced cases where a bean is OSGi aware and simply wants to publishes itself (for example for service factories)). However this is not the case and since both beans use the same name (the service and the bean) the last one to be read (the service) overrides the former. And since the interface is not a ServiceReference (required to export a service), the "cryptic" exception is being thrown.

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Re: Problem registering service [message #678801 is a reply to message #677149]

Thu, 09 June 2011 14:45

Barbara Rosi-Schwartz

Messages: 448
Registered: July 2009

Senior Member

Thanks Costin, your explanation makes it all clear now.

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