- All Known Implementing Classes:
- AsyncBinaryStore.QueueDaemon, Daemon, LoadBalancer.RequestHandler, LoadBalancer.ResponseHandler, LoadBalancer.SocketHandler, MulticastTest.Listener, ReadWriteBackingMap.ReadThread, ReadWriteBackingMap.WriteThread, RefreshableAddressProvider.RefreshThread, SessionHelper.SessionReaperDaemon, TaskDaemon
public interface Guardable
A Guardable is a logical execution unit whose lifetime may be guarded by a
Guardian. A Guardable may be a simple thread, or a more complex service.
Guardable objects are responsible for periodically proving that they are
alive. Failure to do so will cause the Guardian to take corrective actions:
Note: To prevent cascading failure (e.g. deadlock) all corrective
actions are performed by the Guardian on temporary threads.
Guardable objects should be registered with an sufficiently sized SLA to
accommodate variances in system-load, GC latencies etc. Guardians are not
responsible for detecting or correcting for these conditions.
- The Guardian may attempt to revive the Guardable by calling
- Upon failure to recover, the Guardian will abandon the Guardable by
unregistering it and calling terminate.
- Coherence 3.5
void setContext(Guardian.GuardContext context)
- Set the guard context. Passing in null indicates that the
Guardable is no longer being monitored by a Guardian.
context - the context guarding this Guardable
- Attempt to recover this Guardable.
In a common case where the Guardable has an associated thread, a
suitable action would be to interrupt the thread.
If this method does not return before the timeout expires, the Guardable
will be considered unrecoverable and will be terminated.
- Terminate this Guardable.
This is the final action taken by the Guardian before the Guardable is
removed from its responsibility list.
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