Simplyfy ServiceSupport and introduce ServiceWithStatus interface to remove
tangle between util and support
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Key: CAMEL-4381
URL: https://issues.apache.org/jira/browse/CAMEL-4381
Project: Camel
Issue Type: Improvement
Components: camel-core
Affects Versions: 2.8.0
Reporter: Christian Schneider
Assignee: Christian Schneider
Fix For: 2.9.0
Currently ServiceSupport and ServiceHelper form a dependency cycle.
ServiceSupport calls ServiceHelper to start and stop services and
ServiceSupport operate on ServiceSupport classes.
To solve that I introduce an Interface ServiceWithSupport (open for a better
naming). This interface extends Service and has all relevant methods from
ServiceSupport. So ServiceHelper can operate on ServiceWithStatus and the
tangle goes away.
Addtionally I split up ServiceSupport into ServiceSupport which has no children
and ChildServiceSupport which has. This is because we seem to have only two
classes that actually use the children functionality. The rest of the classes
that extend ServiceSupport have no children. So having them all extend the old
ServiceSupport introduces a lot of unneeded complexity.
The change should be fairly compatible. The only possible problem are third
party components that use children. As we only had two such components in camel
the chance that something breaks is fairly low.
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