Mark Payne created NIFI-424:
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Summary: Processors / Controller Services should not be able to
directly call ControllerService.initialize and
ControllerService.onPropertyModified
Key: NIFI-424
URL: https://issues.apache.org/jira/browse/NIFI-424
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Reporter: Mark Payne
Currently, when a component obtains a Controller Service, it could call
onPropertyModified or initialize, which can cause some weird and unexpected
behaviors, since these methods are expected to be called only within the
constraints of a well-defined component lifecycle. We should prevent this by
intercepting the method call and throwing an IllegalStateException unless the
method call is coming from the framework.
Implementation details: This can be achieved by looking at the
StandardControllerServiceProvider, which implements all Controller Service
interfaces with proxies. In that proxy, it should simply throw an Exception.
Then, just ensure that the framework never calls the proxy but only calls
directly into the implementing class.
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