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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

static org.apache.log4j.Logger

LOG

Constructor Summary

MinQueryCostSelector()

Method Summary

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