MemoryEvaluator (Quartz Parent POM 2.0.1 API)

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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