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

protected org.apache.hadoop.conf.Configuration	conf The merged Query conf.
protected DriverSelectorQueryContext	driverContext The driver ctx
protected LensConf	lensConf The query conf.
static org.apache.commons.logging.Log	LOG The Constant LOG
protected String	selectedDriverQuery The selected Driver query.
protected String	userQuery The user query.

Constructor Summary

protected

AbstractQueryContext(String query, String user, LensConf qconf, org.apache.hadoop.conf.Configuration conf, Collection<LensDriver> drivers)

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

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

Field Detail

LOG

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

The Constant LOG

userQuery

protected String userQuery

The user query.

conf

protected transient org.apache.hadoop.conf.Configuration conf

The merged Query conf.

lensConf

protected LensConf lensConf

The query conf.

driverContext

protected transient DriverSelectorQueryContext driverContext

The driver ctx

selectedDriverQuery

protected String selectedDriverQuery

The selected Driver query.

Constructor Detail

AbstractQueryContext

protected AbstractQueryContext(String query,
                               String user,
                               LensConf qconf,
                               org.apache.hadoop.conf.Configuration conf,
                               Collection<LensDriver> drivers)

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