Evaluator (Quartz Parent POM 2.0.1 API)

org.quartz.locality.constraint.evaluator Interface Evaluator<T extends Constraint>

Type Parameters:

T - The constraint this evaluator is uniquely responsible for

All Known Subinterfaces:

PersistentEvaluator<T,V>

All Known Implementing Classes:

CpuEvaluator, EhcacheEvaluator, MemoryEvaluator, NodeGroupEvaluator, OsEvaluator

public interface Evaluator<T extends Constraint>

An Evaluator will match and potentially return best suited nodes for a Job to execute on.

Author:

Alex Snaps

See Also:

Constraint

matches

boolean matches(T constraint)

Evaluates the constraint against local node.

Parameters:

constraint - The constraint to evaluate

Returns:

true if local node is a match

See Also:

Constraint#matches(Object)

suitedNodes

List<String> suitedNodes(T constraint)

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

Parameters:

constraint - To find best suited nodes for

Returns:

List of best suited Quartz instanceId

verify

void verify(T constraint)
            throws LocalityException

Verifies the validity of a constraint. Throws exception should the constraint fail to validate.

Parameters:

constraint - The constraint to validate

Throws:

LocalityException - if validation fails