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From "Felix Meschberger (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FELIX-3754) Services registered from within the activate method may not be bound
Date Tue, 13 Nov 2012 23:24:13 GMT
Felix Meschberger created FELIX-3754:

             Summary: Services registered from within the activate method may not be bound
                 Key: FELIX-3754
                 URL: https://issues.apache.org/jira/browse/FELIX-3754
             Project: Felix
          Issue Type: Bug
          Components: Declarative Services (SCR)
    Affects Versions: scr-1.6.2
            Reporter: Felix Meschberger
             Fix For: scr-1.8.0

The Sling POST Servlet registers a number of services in the activate method and expects these
services to be bound to itself. With SCR 1.6.0 this worked because each component instance
had its dependency managers configured with its component instance.

As of SCR 1.6.2 the DependencyManager instances are shared amongst all component instances
and thus don't have a reference to the component instances. Instead actually bind, unbind
and update services the DependencyManager instances call the respective component manager
which then dispatches to the component instances.

At the point in time when the activate method is called (in the ImmediateComponentManager.createComponentInstance
method) the actual component instance is not "registered" with the component manager yet and
thus a bind call while the activate method is called cannot be satisfied.

To fix this, the component instance must be "registered" with the component manager before
calling the activate method. If the activate method fails, the instance must of course be
"unregistered" again.

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