org.adroitlogic.x.base.evaluators

Class NodeWiseFailoverEnvironmentEvaluator

java.lang.Object

org.adroitlogic.x.api.EnvironmentEvaluator

org.adroitlogic.x.base.evaluators.NodeWiseFailoverEnvironmentEvaluator

public class NodeWiseFailoverEnvironmentEvaluator
extends EnvironmentEvaluator

The EnvironmentEvaluator used for processing failover related environment changes. Specifically, used for node wise failover strategy related changes. This will keep a list of

pinnedNodes

which will be used to check if the current node has any relationship to those nodes, either as a pinned node or as an acting as node.

Since:

17.01

Author:

Imesha Sudasingha

Constructor Summary

Constructors

Constructor and Description
NodeWiseFailoverEnvironmentEvaluator(int weight, List<String> pinnedNodes)

Method Summary

Modifier and Type	Method and Description
List<String>	getPinnedNodes()
protected boolean	isEvaluationPositive(XEnvironment environment) For example, lets say that an evaluator want to evaluate whether the tags nodeName:node1, groupName:group1 are there in the environment's tags.

Methods inherited from class org.adroitlogic.x.api.EnvironmentEvaluator

evaluate, getNegativeWeight, getPositiveWeight, getPriority

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeWiseFailoverEnvironmentEvaluator

public NodeWiseFailoverEnvironmentEvaluator(int weight,
                                            List<String> pinnedNodes)

Method Detail

isEvaluationPositive

protected boolean isEvaluationPositive(XEnvironment environment)

For example, lets say that an evaluator want to evaluate whether the tags nodeName:node1, groupName:group1 are there in the environment's tags. Then this method should check whether those tags are there in the environment and return true/false accordingly. If this returns true, the class which is using the evaluator for evaluation purposes will be returned a value equal to the

positiveWeight

.

Specified by:

isEvaluationPositive in class EnvironmentEvaluator

Parameters:

environment - the environment subjected to the evaluation

Returns:

true/false according to the evaluation result

getPinnedNodes

public List<String> getPinnedNodes()