org.hawkular.agent.monitor.scheduler

Class IntervalBasedScheduler<T extends MeasurementType<Object>,D extends DataPoint>

java.lang.Object

org.hawkular.agent.monitor.scheduler.IntervalBasedScheduler<T,D>

Type Parameters:

T - the sublclass of MeasurementType to handle (such as metric types or avail types)

D - the DataPoint type (such as metric data or avail data)

public abstract class IntervalBasedScheduler<T extends MeasurementType<Object>,D extends DataPoint>
extends Object

Schedules metric collections and avail checks and will invoke completion handlers to store that data.

Author:

John Mazzitelli, Peter Palaga

Field Summary

Fields

Modifier and Type	Field and Description
protected ServiceStatus	status lifecycle status of the scheduler itself

Method Summary

Modifier and Type	Method and Description
protected abstract <L,MT extends MeasurementType<L>> Runnable	createJob(SamplingService<L> endpointService, Collection<MeasurementInstance<L,MT>> instances, Consumer<D> completionHandler)
static IntervalBasedScheduler<AvailType<Object>,AvailDataPoint>	forAvails(String name, int schedulerThreads, Consumer<AvailDataPoint> completionHandler) Static method that builds a scheduler (along with its thread pool) for availability checking.
static IntervalBasedScheduler<MetricType<Object>,MetricDataPoint>	forMetrics(String name, int schedulerThreads, Consumer<MetricDataPoint> completionHandler) Static method that builds a scheduler (along with its thread pool) for metric collection.
protected abstract <L,MT extends MeasurementType<L>> Collection<MeasurementInstance<L,MT>>	getMeasurementInstances(Resource<L> resource)
<L,TT extends MeasurementType<L>> void	rescheduleAll(SamplingService<L> endpointService, List<Resource<L>> resources) This will reschedule all metric collection and avail checking jobs for the given endpoint.
<L,TT extends MeasurementType<L>> void	schedule(SamplingService<L> endpointService, List<Resource<L>> resources) Schedules metric collections and avail checks for the given resources.
void	start()
void	stop()
<L,TT extends MeasurementType<L>> void	unschedule(SamplingService<L> endpointService, List<Resource<L>> resources) Removes any existing metric collections and avail checks that are scheduled for the given resources.

Methods inherited from class java.lang.Object

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

Field Detail

status

protected volatile ServiceStatus status

lifecycle status of the scheduler itself

Method Detail

forMetrics

public static IntervalBasedScheduler<MetricType<Object>,MetricDataPoint> forMetrics(String name,
                                                                                    int schedulerThreads,
                                                                                    Consumer<MetricDataPoint> completionHandler)

Static method that builds a scheduler (along with its thread pool) for metric collection.

Parameters:

name - the name of the scheduler (used for things like naming the threads)

schedulerThreads - number of core threads in the thread pool

completionHandler - object that is notified of metric values when they are collected

Returns:

the new metric collection scheduler

forAvails

public static IntervalBasedScheduler<AvailType<Object>,AvailDataPoint> forAvails(String name,
                                                                                 int schedulerThreads,
                                                                                 Consumer<AvailDataPoint> completionHandler)

Static method that builds a scheduler (along with its thread pool) for availability checking.

Parameters:

name - the name of the scheduler (used for things like naming the threads)

schedulerThreads - number of core threads in the thread pool

completionHandler - object that is notified of availability results when they are checked

Returns:

the new availability checking scheduler

rescheduleAll

public <L,TT extends MeasurementType<L>> void rescheduleAll(SamplingService<L> endpointService,
                                                            List<Resource<L>> resources)

This will reschedule all metric collection and avail checking jobs for the given endpoint. Any jobs running currently for that endpoint will be canceled, and the given resources will have their metric/avail jobs recreated and rescheduled.

Parameters:

endpointService - defines where the resources are

resources - the resources whose metric collections/avail checks are to be rescheduled

schedule

public <L,TT extends MeasurementType<L>> void schedule(SamplingService<L> endpointService,
                                                       List<Resource<L>> resources)

Schedules metric collections and avail checks for the given resources. Unliked rescheduleAll(SamplingService, List), this method keeps currently scheduled jobs in place.

Parameters:

endpointService - defines where the resources are

resources - the resources whose metric collections/avail checks are to be added to the scheduler

unschedule

public <L,TT extends MeasurementType<L>> void unschedule(SamplingService<L> endpointService,
                                                         List<Resource<L>> resources)

Removes any existing metric collections and avail checks that are scheduled for the given resources. Unliked rescheduleAll(SamplingService, List), this method keeps other currently scheduled jobs in place.

Parameters:

endpointService - defines where the resources are

resources - the resources whose metric collections/avail checks are to be removed from the scheduler

createJob

protected abstract <L,MT extends MeasurementType<L>> Runnable createJob(SamplingService<L> endpointService,
                                                                        Collection<MeasurementInstance<L,MT>> instances,
                                                                        Consumer<D> completionHandler)

getMeasurementInstances

protected abstract <L,MT extends MeasurementType<L>> Collection<MeasurementInstance<L,MT>> getMeasurementInstances(Resource<L> resource)

start

public void start()

stop

public void stop()