org.apache.lens.server.api.driver

Class MinQueryCostSelector

java.lang.Object

org.apache.lens.server.api.driver.MinQueryCostSelector

All Implemented Interfaces:

DriverSelector

public class MinQueryCostSelector
extends Object
implements DriverSelector

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.log4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
MinQueryCostSelector()

Method Summary

Methods

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.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.log4j.Logger LOG

Constructor Detail

MinQueryCostSelector

public MinQueryCostSelector()

Method Detail

select

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

Returns the driver that has the minimum query cost.

Specified by:

select in interface DriverSelector

Parameters:

ctx - the context

conf - the conf

Returns:

the lens driver