org.apache.lens.server.api.driver

Class WeightedQueryCostDriverSelector

java.lang.Object

org.apache.lens.server.api.driver.WeightedQueryCostDriverSelector

All Implemented Interfaces:

DriverSelector

public class WeightedQueryCostDriverSelector
extends Object
implements DriverSelector

Constructor Summary

Constructors

Constructor and Description
WeightedQueryCostDriverSelector()

Method Summary

Modifier and Type	Method and Description
LensDriver	select(AbstractQueryContext ctx, org.apache.hadoop.conf.Configuration conf) Returns the driver that has the minimum query cost according to predefined driver allocation ratios.

Methods inherited from class java.lang.Object

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

Constructor Detail

WeightedQueryCostDriverSelector

public WeightedQueryCostDriverSelector()

Method Detail

select

public LensDriver select(AbstractQueryContext ctx,
                         org.apache.hadoop.conf.Configuration conf)

Returns the driver that has the minimum query cost according to predefined driver allocation ratios.

Specified by:

select in interface DriverSelector

Parameters:

ctx - the context

conf - the conf

Returns:

the lens driver