org.gcube.common.core.contexts.ghn
Class Scheduler

java.lang.Object
  org.gcube.common.core.utils.handlers.GCUBEHandler<HANDLED>
      org.gcube.common.core.utils.handlers.GCUBEScheduledHandler<GHNContext>
          org.gcube.common.core.contexts.ghn.Scheduler

All Implemented Interfaces:

GCUBEIHandler<GHNContext>, Lifetime<GHNContext>

public class Scheduler
extends GCUBEScheduledHandler<GHNContext>

Schedules updates to the gHN profile.

Author:

Fabio Simeoni (University of Strathclyde)

Nested Class Summary

Nested classes/interfaces inherited from class org.gcube.common.core.utils.handlers.GCUBEScheduledHandler

GCUBEScheduledHandler.Mode

Field Summary

Fields inherited from class org.gcube.common.core.utils.handlers.GCUBEScheduledHandler

exception, exceptionCount, interval, repeat

Fields inherited from class org.gcube.common.core.utils.handlers.GCUBEHandler

handled, logger, producer

Constructor Summary

Scheduler(GHNContext ctxt, long interval, GCUBEScheduledHandler.Mode mode)
Creates an instance.

Method Summary

protected boolean

repeat(Exception exception, int exceptionCount) Indicates whether the scheduling should continue.

Methods inherited from class org.gcube.common.core.utils.handlers.GCUBEScheduledHandler

getInterval, getMode, getScheduled, onIteration, run, setInterval, setMode, setScheduled, stop

Methods inherited from class org.gcube.common.core.utils.handlers.GCUBEHandler

clearBlackboard, getBlackboard, getHandled, getId, getLogger, getName, getScopeManager, getSecurityManager, getState, notify, setBlackboard, setHandled, setLogger, setName, setScopeManager, setSecurityManager, setState, subscribe, undo, unsubscribe

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.gcube.common.core.utils.handlers.lifetime.Lifetime

getState

Methods inherited from interface org.gcube.common.core.utils.handlers.GCUBEIHandler

clearBlackboard, getBlackboard, getHandled, getId, getLogger, getName, getScopeManager, getSecurityManager, setBlackboard, setHandled, setLogger, setName, setScopeManager, setSecurityManager, subscribe, undo, unsubscribe

Constructor Detail

Scheduler

public Scheduler(GHNContext ctxt,
                 long interval,
                 GCUBEScheduledHandler.Mode mode)

Creates an instance.

Parameters:

ctxt - the GHNContext.

interval - the schedule interval.

mode - the scheduling mode.

Method Detail

repeat

protected boolean repeat(Exception exception,
                         int exceptionCount)

Indicates whether the scheduling should continue. It is invoked after each iteration of the schedule as a pre-condition to continue it. By default, it returns true if no exception occurred during the iteration, and false otherwise. Override to implement specific conditions.

Overrides:

repeat in class GCUBEScheduledHandler<GHNContext>

Parameters:

exception - any exception which may have occurred during the iteration, or null if the iteration completed successfully.

exceptionCount - the number of exceptions which have occurred so far during the schedule.

Returns:

true if the scheduling should continue, false otherwise.