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From "Richard S. Hall (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FELIX-5198) Service should not be available while being unregistered
Date Thu, 25 Feb 2016 14:30:18 GMT

    [ https://issues.apache.org/jira/browse/FELIX-5198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15167251#comment-15167251
] 

Richard S. Hall commented on FELIX-5198:
----------------------------------------

I won't say I remember all of the specifics, but there are issues around this. I think at
one time we did implement it so that a service became unavailable as soon as unregistering
started, but we received a lot of blow back from people who wanted to do something with the
service to say goodbye. The compromise we came up with was [I think] to only allow people
who already had services references to be able to get a service, but to now allow any new
lookups once unregistration started.

> Service should not be available while being unregistered
> --------------------------------------------------------
>
>                 Key: FELIX-5198
>                 URL: https://issues.apache.org/jira/browse/FELIX-5198
>             Project: Felix
>          Issue Type: Bug
>          Components: Framework
>    Affects Versions: framework-5.4.0
>            Reporter: Carsten Ziegeler
>            Assignee: David Bosschaert
>             Fix For: framework-5.6.0
>
>
> Currently it is possible to get a service while it is  being unregistered - if the service
is get during processing of the unregistering event. This is the order of events:
> a) a service (factory) is unregistered in the framework
> b) the UNREGISTERING event is sent before the service is actually unregistered (this
is as defined in the spec)
> c) the above event is handled synchronously, reactivating dependent components
> d) during this reactivation, some component looks up the service that is unregistered
in a). as this service is still registered and marked as valid, it gets it
> According to ServiceRegistration.unregister the service should not be available anymore
while the events are sent



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