lbg.peer.strategy.scheduling.consumption
Class CommonConsumptionScheduling

java.lang.Object
  lbg.peer.strategy.scheduling.consumption.CommonConsumptionScheduling

All Implemented Interfaces:

ConsumptionSchedulingPolicy

Direct Known Subclasses:

AdaptiveMC4ConsumptionScheduling, AdaptiveTCoRConsumptionScheduling, ConservativeTimeStrideConsumptionScheduling, DataConsumptionScheduling, FavorsConsumptionScheduling, GrantsConsumptionScheduling, MC4ConsumptionScheduling, MCoSConsumptionScheduling, MTBCConsumptionScheduling, MTTCConsumptionScheduling, PerformanceConsumptionScheduling, RandomConsumptionScheduling, ReliableMLConsumptionScheduling, TCaRConsumptionScheduling, TCoRConsumptionScheduling

public abstract class CommonConsumptionScheduling
extends java.lang.Object
implements ConsumptionSchedulingPolicy

Reliability-ranked use of Consumption Grants.

Author:

Cyril Briquet

Constructor Summary

CommonConsumptionScheduling(Peer managed_peer, Scheduler scheduler)

Method Summary

protected static boolean	assertConsumptionGrantsAvailability(ConsumptionGrantsContainer c_g, int peer_idx)
protected abstract LocalQueueCursor	getLocalQueueCursor() Local Queue Cursor accessor.
protected abstract Ranking	rankSuppliers(ConsumptionGrantsContainer c_g, RequestContainer rc) Rank Suppliers.
int	scheduleConsumptionTasks() ConsumptionSchedulingPolicy implementation.
protected RequestContainer	scheduleFirstConsumptionTask() Schedules first queued Local Task as a Consumption Task.
protected RequestContainer	scheduleNextConsumptionTask(LocalQueueCursor lqc) Schedules next queued Local Task as a Consumption Task.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonConsumptionScheduling

public CommonConsumptionScheduling(Peer managed_peer,
                                   Scheduler scheduler)
                            throws GridException

Throws:

GridException

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

scheduleConsumptionTasks

public int scheduleConsumptionTasks()
                             throws GridException

ConsumptionSchedulingPolicy implementation.

Note: this implementation requires that getLocalQueueCursor() returns a non-null reference to an existing Local Queue Cursor.

Specified by:

scheduleConsumptionTasks in interface ConsumptionSchedulingPolicy

Returns:

number of successfully scheduled Consumption Tasks

Throws:

GridException - if an error occurs while using Consumption Grants to schedule Consumption Tasks

rankSuppliers

protected abstract Ranking rankSuppliers(ConsumptionGrantsContainer c_g,
                                         RequestContainer rc)
                                  throws GridException

Rank Suppliers.

Parameters:

c_g - collected Consumption Grants container

rc - target Task container

Returns:

Suppliers Ranking

Throws:

GridException - if a problem occured while ranking Suppliers

getLocalQueueCursor

protected abstract LocalQueueCursor getLocalQueueCursor()

Local Queue Cursor accessor.

Returns:

Local Queue Cursor, or null if none has been defined

scheduleFirstConsumptionTask

protected RequestContainer scheduleFirstConsumptionTask()
                                                 throws GridException

Schedules first queued Local Task as a Consumption Task.

Returns:

first Consumption Task, may be null if all waiting Local Tasks are restricted to local execution

Throws:

GridException - if there is no Consumption Task to schedule

scheduleNextConsumptionTask

protected RequestContainer scheduleNextConsumptionTask(LocalQueueCursor lqc)
                                                throws GridException

Schedules next queued Local Task as a Consumption Task. The next Local Task is determined by following information provided by the Local Queue cursor.

Parameters:

lqc - Local Queue Cursor

Returns:

next Consumption Task, may be null if all waiting Local Tasks are restricted to local execution

Throws:

GridException - if a parameter is illegal

assertConsumptionGrantsAvailability

protected static boolean assertConsumptionGrantsAvailability(ConsumptionGrantsContainer c_g,
                                                             int peer_idx)
                                                      throws GridException

Throws:

GridException