org.apache.lens.server.api.driver

Class NoOpDriverQueryHook

java.lang.Object

org.apache.lens.server.api.driver.NoOpDriverQueryHook

All Implemented Interfaces:

DriverQueryHook

public class NoOpDriverQueryHook
extends Object
implements DriverQueryHook

Constructor Summary

Constructors

Constructor and Description
NoOpDriverQueryHook()

Method Summary

Methods

Modifier and Type	Method and Description
void	postDriverSelection(AbstractQueryContext ctx) Called just after driver has been selected to execute a query.
void	preLaunch(QueryContext ctx) Called just before launching the query on the selected driver.

Methods inherited from class java.lang.Object

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

Constructor Detail

NoOpDriverQueryHook

public NoOpDriverQueryHook()

Method Detail

preLaunch

public void preLaunch(QueryContext ctx)

Description copied from interface: DriverQueryHook

Called just before launching the query on the selected driver.

Specified by:

preLaunch in interface DriverQueryHook

postDriverSelection

public void postDriverSelection(AbstractQueryContext ctx)
                         throws LensException

Description copied from interface: DriverQueryHook

Called just after driver has been selected to execute a query. Note: Note if this method updates any configuration, same should be reflected in QueryContext via AbstractQueryContext.updateConf(Map) to ensure the modified configration is persisted and is available on server restarts and other bookkeeping needs.

Specified by:

postDriverSelection in interface DriverQueryHook

Throws:

LensException