[FELIX-1922] issue with configuration policy=require and with factory components

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: scr-1.2.0
• Fix Version/s: scr-1.4.0
• Component/s: Declarative Services (SCR)
• Environment: linux fc10, jdk1.5, jdk.1.6
• Assignee: Felix Meschberger
• Reporter: Pierre De Rop
• Created: 06/Dec/09 19:26
• Updated: 30/Jul/10 11:42
• Resolved: 14/Dec/09 10:06

Description

This issue is related to the following dev post: -> http://www.mail-archive.com/[e-mail]/msg14167.html

There are two components that comes into play:

1) The first one (EnglishDictionary) has a configuration-policy="require" parameter and a factory="true" parameter:

<?xml version='1.0' encoding='utf-8'?>
<component name='EnglishDictionary' xmlns='http://www.osgi.org/xmlns/scr/v1.1.0' factory='true' configuration-policy='require' modified='updated'>
<implementation class='com.alcatel_lucent.samples.scr.dictionary.english.EnglishDictionary'/>
<service>
<provide interface='com.alcatel_lucent.samples.scr.dictionary.DictionaryService'/>
</service>
</component>

The EnglishDictionary parameter has actually a CM Configuration which is required before activation: that is why it uses configuration-policy='require'.

2) The second one (EnglishDictionaryFactory) is a factory component that is meant to instantiate the EnglishDictionary component.:

<?xml version='1.0' encoding='utf-8'?>
<component name='EnglishDictionaryFactory'>
<implementation class='com.alcatel_lucent.samples.scr.dictionary.english.EnglishDictionaryFactory'/>
<reference name='bind' interface='org.osgi.service.component.ComponentFactory' bind='bind' unbind='unbind' target='(component.name=EnglishDictionary)'/>
</component>

The issue takes place when the EnglishDictionaryFactory component tries to instantiate the EnglishDictionary like this:

class EnglishDictionaryFactory {
public void bind(ComponentFactory factory)

{ factory.newInstance(new Hashtable()); }

}

-> The newInstance raises the following exception:

org.osgi.service.component.ComponentException: Failed activating component
at org.apache.felix.scr.impl.manager.ComponentFactoryImpl.newInstance(ComponentFactoryImpl.java:118)
at com.alcatel_lucent.samples.scr.dictionary.english.EnglishDictionaryFactory.bind(EnglishDictionaryFactory.java:19)
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:597)
at org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:213)
at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:38)
at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:542)
at org.apache.felix.scr.impl.helper.BaseMethod$NotResolved.invoke(BaseMethod.java:500)
at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:434)
at org.apache.felix.scr.impl.manager.DependencyManager.invokeBindMethod(DependencyManager.java:997)
at org.apache.felix.scr.impl.manager.DependencyManager.bind(DependencyManager.java:908)
at org.apache.felix.scr.impl.manager.DependencyManager.open(DependencyManager.java:832)
at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createImplementationObject(ImmediateComponentManager.java:200)
at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createComponent(ImmediateComponentManager.java:118)
at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:982)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:297)
at org.apache.felix.scr.impl.manager.AbstractComponentManager$1.doRun(AbstractComponentManager.java:137)
at org.apache.felix.scr.impl.ComponentActivatorTask.run(ComponentActivatorTask.java:67)
at org.apache.felix.scr.impl.ComponentActorThread.run(ComponentActorThread.java:96)
at java.lang.Thread.run(Thread.java:619)