org.quartz.locality.constraint.evaluator
Class MemoryEvaluator

java.lang.Object
  java.util.TimerTask
      org.quartz.locality.constraint.evaluator.EvaluatorTimerTask
          org.quartz.locality.constraint.evaluator.MemoryEvaluator

All Implemented Interfaces:

Runnable, Evaluator<MemoryConstraint>, PersistentEvaluator<MemoryConstraint,Long>

public class MemoryEvaluator
extends EvaluatorTimerTask
implements PersistentEvaluator<MemoryConstraint,Long>

Evaluates memory constraints

Author:

Alex Snaps

Nested Class Summary

Nested classes/interfaces inherited from class org.quartz.locality.constraint.evaluator.EvaluatorTimerTask

EvaluatorTimerTask.Status

Constructor Summary

MemoryEvaluator()

Method Summary

void	initialize(String nodeName, ConcurrentMap<String,Long> map) Will start the monitoring, to store available memory on the local node in the shared map.
boolean	matches(MemoryConstraint constraint) Evaluates the constraint against local node.
boolean	matches(MemoryConstraint constraint, String node) Verifies whether the constraint passed is validating on the node
void	monitor() Performs the monitoring of the free memory on the local node
List<String>	suitedNodes(MemoryConstraint constraint) Returns a list of best suited node (instanceId) based on the constraint
void	verify(MemoryConstraint constraint) Always true

Methods inherited from class org.quartz.locality.constraint.evaluator.EvaluatorTimerTask

cancelMonitoring, getInterval, getStatus, pauseMonitoring, resumeMonitoring, run, startMonitoring

Methods inherited from class java.util.TimerTask

cancel, scheduledExecutionTime

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryEvaluator

public MemoryEvaluator()

Method Detail

matches

public boolean matches(MemoryConstraint constraint)

Evaluates the constraint against local node.

Specified by:

matches in interface Evaluator<MemoryConstraint>

Parameters:

constraint - The constraint to evaluate

Returns:

true if local node is a match

See Also:

Constraint#matches(Object)

matches

public boolean matches(MemoryConstraint constraint,
                       String node)

Verifies whether the constraint passed is validating on the node

Parameters:

constraint - The constraint to evaluate

node - The node to evaluate against

Returns:

true if node is a match

suitedNodes

public List<String> suitedNodes(MemoryConstraint constraint)

Returns a list of best suited node (instanceId) based on the constraint

Specified by:

suitedNodes in interface Evaluator<MemoryConstraint>

Parameters:

constraint - To find best suited nodes for

Returns:

List of best suited Quartz instanceId

verify

public void verify(MemoryConstraint constraint)

Always true

Specified by:

verify in interface Evaluator<MemoryConstraint>

Parameters:

constraint - The constraint to validate

monitor

public void monitor()

Performs the monitoring of the free memory on the local node

Specified by:

monitor in class EvaluatorTimerTask

initialize

public void initialize(String nodeName,
                       ConcurrentMap<String,Long> map)

Will start the monitoring, to store available memory on the local node in the shared map.

Specified by:

initialize in interface PersistentEvaluator<MemoryConstraint,Long>

Parameters:

nodeName - Local instanceId

map - the shared persistent storage for the Evaluator