Interface to notify state changes of a service.
This is the base implementation class for services.
Composition of services.
A serializable lifecycle event: the time a state transition occurred, and what state was entered.
This is a state change listener that logs events at INFO level
This class contains a set of methods to work with services, especially to walk them through their lifecycle.
Implements the service state model.
Exception that can be raised on state change operations, whose exit code can be explicitly set, determined from that of any nested cause, or a default value of
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