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From Jérémy Cazaux (JIRA) <j...@apache.org>
Subject [jira] [Created] (FELIX-3836) NPE when calling InstanceDescription.getDescription() ; // HandlerDescription is missing for org.apache.felix.ipojo.handlers.event:subscriber handler
Date Tue, 01 Jan 2013 17:22:12 GMT
Jérémy Cazaux created FELIX-3836:
------------------------------------

             Summary: NPE when calling InstanceDescription.getDescription() ; //  HandlerDescription
is missing for org.apache.felix.ipojo.handlers.event:subscriber handler
                 Key: FELIX-3836
                 URL: https://issues.apache.org/jira/browse/FELIX-3836
             Project: Felix
          Issue Type: Bug
          Components: iPOJO
            Reporter: Jérémy Cazaux


java.lang.NullPointerException
	at org.apache.felix.ipojo.architecture.InstanceDescription.getDescription(InstanceDescription.java:164)
	at org.apache.felix.ipojo.PrimitiveInstanceDescription.getDescription(PrimitiveInstanceDescription.java:165)

NPE when executing this line in the InstanceDescription :    instance.addElement(m_handlers[i].getHandlerInfo()); 

My component has 4 handlers : [org.ow2.jonas.ipojo.interceptor:interceptor, org.apache.felix.ipojo:provides,
org.apache.felix.ipojo.handlers.event:subscriber, org.apache.felix.ipojo:architecture]

cazauxj@jonas$ inspect service capability 103
JOnAS :: Services :: JOnAS report :: Extensions :: Deployables (103) provides services:
---------------------------------------------------------------------------------------
component.class = org.ow2.jonas.report.extensions.deployables.internal.DeployablesReportExtension
component.description = factory name="DeployablesReportExtension" bundle="103" state="valid"
implementation-class="org.ow2.jonas.report.extensions.deployables.internal.DeployablesReportExtension"
        requiredhandlers list="[org.ow2.jonas.ipojo.interceptor:interceptor, org.apache.felix.ipojo:provides,
org.apache.felix.ipojo.handlers.event:subscriber, org.apache.felix.ipojo:architecture]"
        missinghandlers list="[]"
        provides specification="org.ow2.jonas.report.api.IReportExtension"
        property name="namespace" type="java.lang.String" value="http://jonas.ow2.org/report/deployables/1.0"
        property name="event.topics" type="java.util.Dictionary" value="{}"
        property name="event.filter" type="java.util.Dictionary" value="{}"
        inherited interfaces="[org.ow2.jonas.report.api.IReportExtension]" superclasses="[]"
component.properties = [Lorg.apache.felix.ipojo.architecture.PropertyDescription;@19c59085
component.providedServiceSpecifications = org.ow2.jonas.report.api.IReportExtension
factory.name = DeployablesReportExtension
factory.state = 1
objectClass = org.apache.felix.ipojo.Factory, org.osgi.service.cm.ManagedServiceFactory
service.id = 299
service.pid = DeployablesReportExtension
----
factory.name = DeployablesReportExtension
instance.name = DeployablesReportExtension-0
namespace = http://jonas.ow2.org/report/deployables/1.0
objectClass = org.ow2.jonas.report.api.IReportExtension
service.id = 303


When debugging, it looks like that the array of HandlerDescription does contain the correct
number of element (4) but the element with index 2 is NULL. So the HandlerDescription is missing
for org.apache.felix.ipojo.handlers.event:subscriber handler. However, all HandlerManager
 are available from the InstanceManager (the HandlerManager associated to the subscriber handler
is not null). I have attached a picture to illustrate this.



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