org.apache.lens.server.api.query
Class DriverSelectorQueryContext

java.lang.Object
  org.apache.lens.server.api.query.DriverSelectorQueryContext

public class DriverSelectorQueryContext
extends Object

Nested Class Summary

static class

DriverSelectorQueryContext.DriverQueryContext

Field Summary

static org.apache.commons.logging.Log

LOG The constant LOG

Constructor Summary

DriverSelectorQueryContext(String userQuery, org.apache.hadoop.conf.Configuration queryConf, Collection<LensDriver> drivers)

Method Summary

org.apache.hadoop.conf.Configuration	getDriverConf(LensDriver driver)
Collection<String>	getDriverQueries()
String	getDriverQuery(LensDriver driver)
QueryCost	getDriverQueryCost(LensDriver driver)
DriverQueryPlan	getDriverQueryPlan(LensDriver driver)
Collection<LensDriver>	getDrivers()
org.apache.hadoop.conf.Configuration	getSelectedDriverConf()
String	getSelectedDriverQuery()
QueryCost	getSelectedDriverQueryCost() Return selected driver's query plan, but check for null conditions first.
DriverQueryPlan	getSelectedDriverQueryPlan() Return selected driver's query plan, but check for null conditions first.
void	setDriverConf(LensDriver driver, org.apache.hadoop.conf.Configuration conf)
void	setDriverQueryPlan(LensDriver driver, DriverQueryPlan qp)
void	setDriverQueryPlans(Map<LensDriver,String> driverQueries, AbstractQueryContext qctx) Sets driver queries, generates plans for each driver by calling explain with respective queries, Sets driverQueryPlans
void	setSelectedDriverQuery(String driverQuery)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

The constant LOG

Constructor Detail

DriverSelectorQueryContext

public DriverSelectorQueryContext(String userQuery,
                                  org.apache.hadoop.conf.Configuration queryConf,
                                  Collection<LensDriver> drivers)

Method Detail

setDriverQueryPlans

public void setDriverQueryPlans(Map<LensDriver,String> driverQueries,
                                AbstractQueryContext qctx)
                         throws LensException

Sets driver queries, generates plans for each driver by calling explain with respective queries, Sets driverQueryPlans

Parameters:

driverQueries -

Throws:

LensException

getSelectedDriverQueryPlan

public DriverQueryPlan getSelectedDriverQueryPlan()
                                           throws LensException

Return selected driver's query plan, but check for null conditions first.

Returns:

DriverQueryPlan of Selected Driver

Throws:

LensException

getSelectedDriverQueryCost

public QueryCost getSelectedDriverQueryCost()
                                     throws LensException

Return selected driver's query plan, but check for null conditions first.

Returns:

DriverQueryPlan of Selected Driver

Throws:

LensException

getSelectedDriverConf

public org.apache.hadoop.conf.Configuration getSelectedDriverConf()

getSelectedDriverQuery

public String getSelectedDriverQuery()

setDriverConf

public void setDriverConf(LensDriver driver,
                          org.apache.hadoop.conf.Configuration conf)

setSelectedDriverQuery

public void setSelectedDriverQuery(String driverQuery)

getDrivers

public Collection<LensDriver> getDrivers()

getDriverQueries

public Collection<String> getDriverQueries()

getDriverQueryPlan

public DriverQueryPlan getDriverQueryPlan(LensDriver driver)

getDriverConf

public org.apache.hadoop.conf.Configuration getDriverConf(LensDriver driver)

getDriverQuery

public String getDriverQuery(LensDriver driver)

getDriverQueryCost

public QueryCost getDriverQueryCost(LensDriver driver)

setDriverQueryPlan

public void setDriverQueryPlan(LensDriver driver,
                               DriverQueryPlan qp)