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https://issues.apache.org/jira/browse/FELIX-3030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13154057#comment-13154057
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Clement Escoffier commented on FELIX-3030:
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The issue here is the mix between the instance lifecycle (VALID / INVALID) and
the service dynamism (BIND/UNBIND). I understand your issue, but the promoted
model is to clean everything during the @Invalidate callback, and not expecting
an @Unbind callback. Indeed, if we call the unbind callback, how does the code
knows if it's just an unbind of a used service or if it's an invalidation.
> Bind/Unbind and lifecycle
> -------------------------
>
> Key: FELIX-3030
> URL: https://issues.apache.org/jira/browse/FELIX-3030
> Project: Felix
> Issue Type: Bug
> Components: iPOJO
> Affects Versions: iPOJO-1.8.0
> Reporter: Yann Diorcet
>
> According to my
> post(http://old.nabble.com/iPojo-lifecycle-and-dependencies-p32003301.html).
> It seems that there is a problem with the lifecycle and dependencies.
> @Component
> @Instantiate
> public final class Abcd {
> @Requires
> private Efg efg;
> @Validate
> private void start() {
> }
> @Invalidate
> private void stop() {
> }
> @Bind(aggregate = true, optional = true)
> private void bindXyz(final Xyz service) {
> }
> @Unbind
> private void unbindXyz(final Xyz service) {
> }
> }
> Scenario 1:
> -A new service(Efg1) provides Efg
> -A new service(Xyz1) provides Xyz
> -The component Abcd is instantiated
> -The bind() is called with Xyz1
> -The start() of the component is called
> -The Efg1 is unregistered
> -The component is invalidated (Efg1 is gone) stop() is called
> -During the time that my component is invalidated, if a new Xyz service(Xyz2)
> is registred (from an another bundle for example) bindXyz() is called
> -After that, if i stop my bundle, my component will be stopped but
> unbindXyz() will be not called(neither for Xyz1 nor Xyz2).
> Scenario 2:
> -A new service(Efg1) provides Efg
> -A new service(Xyz1) provides Xyz
> -The component Abcd is instantiated
> -The bind() is called with Xyz1
> -The start() of the component is called
> -The Efg1 is unregistered
> -The component is invalidated (Efg1 is gone) stop() is called
> -A new service(Efg2) provides Efg
> -The start() of the component is called
> Why all the already existing services are bound at the creation of the
> component and not unbound at the "destruction" of the component?
> Another solution: Why don't bind the optional services at the validation of
> the component and unbind them at the invalidation (like it seems to be done
> with not optional service)?
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