public class TaskHeartbeatHandler extends AbstractService
Service.STATE
Constructor and Description |
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TaskHeartbeatHandler(EventHandler eventHandler,
Clock clock,
int numThreads) |
Modifier and Type | Method and Description |
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void |
progressing(TaskAttemptId attemptID) |
void |
register(TaskAttemptId attemptID) |
protected void |
serviceInit(Configuration conf)
All initialization code needed by a service.
|
protected void |
serviceStart()
Actions called during the INITED to STARTED transition.
|
protected void |
serviceStop()
Actions called during the transition to the STOPPED state.
|
void |
unregister(TaskAttemptId attemptID) |
close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop
public TaskHeartbeatHandler(EventHandler eventHandler, Clock clock, int numThreads)
protected void serviceInit(Configuration conf) throws Exception
AbstractService
AbstractService.init(Configuration)
prevents re-entrancy.
The base implementation checks to see if the subclass has created
a new configuration instance, and if so, updates the base class valueserviceInit
in class AbstractService
conf
- configurationException
- on a failure -these will be caught,
possibly wrapped, and wil; trigger a service stopprotected void serviceStart() throws Exception
AbstractService
AbstractService.start()
prevents re-entrancy.serviceStart
in class AbstractService
Exception
- if needed -these will be caught,
wrapped, and trigger a service stopprotected void serviceStop() throws Exception
AbstractService
AbstractService.stop()
prevents re-entrancy.
Implementations MUST write this to be robust against failures, including
checks for null references -and for the first failure to not stop other
attempts to shut down parts of the service.serviceStop
in class AbstractService
Exception
- if needed -these will be caught and logged.public void progressing(TaskAttemptId attemptID)
public void register(TaskAttemptId attemptID)
public void unregister(TaskAttemptId attemptID)
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