org.apache.hadoop.hive.ql
Class DriverContext

java.lang.Object
  org.apache.hadoop.hive.ql.DriverContext

public class DriverContext
extends Object

DriverContext.

Constructor Summary

DriverContext()

DriverContext(Context ctx)

Method Summary

boolean	addToRunnable(Task<? extends Serializable> tsk)
void	finished(TaskRunner runner)
Context	getCtx()
int	getCurJobNo()
Task<? extends Serializable>	getRunnable(int maxthreads)
void	incCurJobNo(int amount)
static boolean	isLaunchable(Task<? extends Serializable> tsk) Checks if a task can be launched.
boolean	isRunning()
boolean	isShutdown()
void	launching(TaskRunner runner)
TaskRunner	pollFinished() Polls running tasks to see if a task has ended.
void	prepare(QueryPlan plan)
void	prepare(TaskRunner runner)
void	remove(Task<? extends Serializable> task)
void	shutdown() Cleans up remaining tasks in case of failure

Methods inherited from class java.lang.Object

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

Constructor Detail

DriverContext

public DriverContext()

DriverContext

public DriverContext(Context ctx)

Method Detail

isShutdown

public boolean isShutdown()

isRunning

public boolean isRunning()

remove

public void remove(Task<? extends Serializable> task)

launching

public void launching(TaskRunner runner)
               throws HiveException

Throws:

HiveException

getRunnable

public Task<? extends Serializable> getRunnable(int maxthreads)
                                         throws HiveException

Throws:

HiveException

pollFinished

public TaskRunner pollFinished()
                        throws InterruptedException

Polls running tasks to see if a task has ended.

Returns:

The result object for any completed/failed task

Throws:

InterruptedException

shutdown

public void shutdown()

Cleans up remaining tasks in case of failure

isLaunchable

public static boolean isLaunchable(Task<? extends Serializable> tsk)

Checks if a task can be launched.

Parameters:

tsk - the task to be checked

Returns:

true if the task is launchable, false otherwise

addToRunnable

public boolean addToRunnable(Task<? extends Serializable> tsk)
                      throws HiveException

Throws:

HiveException

getCurJobNo

public int getCurJobNo()

getCtx

public Context getCtx()

incCurJobNo

public void incCurJobNo(int amount)

prepare

public void prepare(QueryPlan plan)

prepare

public void prepare(TaskRunner runner)

finished

public void finished(TaskRunner runner)