org.apache.lens.server.query.constraint

Class DefaultQueryLaunchingConstraintsChecker

java.lang.Object

org.apache.lens.server.query.constraint.DefaultQueryLaunchingConstraintsChecker

All Implemented Interfaces:

QueryLaunchingConstraintsChecker

public class DefaultQueryLaunchingConstraintsChecker
extends Object
implements QueryLaunchingConstraintsChecker

This QueryLaunchingConstraintsChecker enforces that a candidate query will be allowed to launch only if all QueryLaunchingConstraints of lens server and all QueryLaunchingConstraints of driver selected for query allow the query to be launched.

Constructor Summary

Constructors

Constructor and Description
DefaultQueryLaunchingConstraintsChecker(com.google.common.collect.ImmutableSet<QueryLaunchingConstraint> lensQueryConstraints)

Method Summary

Modifier and Type	Method and Description
boolean	canLaunch(QueryContext candidateQuery, EstimatedImmutableQueryCollection launchedQueries)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultQueryLaunchingConstraintsChecker

public DefaultQueryLaunchingConstraintsChecker(@NonNull
                                               com.google.common.collect.ImmutableSet<QueryLaunchingConstraint> lensQueryConstraints)

Method Detail

canLaunch

public boolean canLaunch(QueryContext candidateQuery,
                         EstimatedImmutableQueryCollection launchedQueries)

Specified by:

canLaunch in interface QueryLaunchingConstraintsChecker