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

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

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ExplainQueryContext, PreparedQueryContext, QueryContext

public abstract class AbstractQueryContext
extends Object
implements Serializable

See Also:

Serialized Form

Field Summary

static org.apache.commons.logging.Log

LOG The Constant LOG

Method Summary

org.apache.hadoop.conf.Configuration	getDriverConf(LensDriver driver)
String	getDriverQuery(LensDriver driver)
LensDriver	getSelectedDriver() Wrapper method for convenience on driver context
org.apache.hadoop.conf.Configuration	getSelectedDriverConf() Wrapper method for convenience on driver context
String	getSelectedDriverQuery() Wrapper method for convenience on driver context
DriverQueryPlan	getSelectedDriverQueryPlan() Wrapper method for convenience on driver context
void	setDriverQueriesAndPlans(Map<LensDriver,String> driverQueries) Set driver queries, and updates for plan from each driver in the context
void	setSelectedDriver(LensDriver driver) Wrapper method for convenience on driver context
void	setSelectedDriverQuery(String driverQuery) Sets the selected driver query for persistence and also in the driver context

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

Method Detail

setDriverQueriesAndPlans

public void setDriverQueriesAndPlans(Map<LensDriver,String> driverQueries)
                              throws LensException

Set driver queries, and updates for plan from each driver in the context

Parameters:

driverQueries - Map of LensDriver to driver's query

Throws:

LensException

getSelectedDriverQuery

public String getSelectedDriverQuery()

Wrapper method for convenience on driver context

Returns:

the selected driver's query

getDriverQuery

public String getDriverQuery(LensDriver driver)

getDriverConf

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

getSelectedDriverConf

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

Wrapper method for convenience on driver context

Returns:

the selected driver's conf

setSelectedDriverQuery

public void setSelectedDriverQuery(String driverQuery)

Sets the selected driver query for persistence and also in the driver context

Parameters:

driverQuery -

setSelectedDriver

public void setSelectedDriver(LensDriver driver)

Wrapper method for convenience on driver context

Parameters:

driver - Lens driver

getSelectedDriver

public LensDriver getSelectedDriver()

Wrapper method for convenience on driver context

Returns:

the selected driver

getSelectedDriverQueryPlan

public DriverQueryPlan getSelectedDriverQueryPlan()
                                           throws LensException

Wrapper method for convenience on driver context

Returns:

the selected driver

Throws:

LensException