org.apache.hadoop.hive.ql.exec

Class StatsTask

java.lang.Object

org.apache.hadoop.hive.ql.exec.Task<StatsWork>

org.apache.hadoop.hive.ql.exec.StatsTask

All Implemented Interfaces:

Serializable, Node

public class StatsTask
extends Task<StatsWork>
implements Serializable

StatsTask implementation.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.Task

Task.FeedType, Task.TaskState

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.exec.Task

BACKUP_COMMON_JOIN, backupChildrenTasks, backupTask, childTasks, clonedConf, COMMON_JOIN, conf, console, context, CONVERTED_MAPJOIN, CONVERTED_MAPJOIN_LOCAL, CONVERTED_SORTMERGEJOIN, deferredWorkContext, feedSubscribers, HINTED_MAPJOIN, HINTED_MAPJOIN_LOCAL, id, jobID, MAPJOIN_ONLY_NOBACKUP, NO_TAG, parentTasks, queryDisplay, queryPlan, queryState, rootTask, taskCounters, taskHandle, taskQueue, taskTag, work

Constructor Summary

Constructors

Constructor and Description
StatsTask()

Method Summary

Modifier and Type	Method and Description
int	execute() This method is overridden in each Task.
String	getName()
StageType	getType() Should be overridden to return the type of the specific task among the types in StageType.
void	initialize(QueryState queryState, QueryPlan queryPlan, TaskQueue taskQueue, Context context)
static ExecutorService	newThreadPool(HiveConf conf)
protected void	receiveFeed(Task.FeedType feedType, Object feedValue)

Methods inherited from class org.apache.hadoop.hive.ql.exec.Task

addDependentTask, canExecuteInParallel, cloneConf, done, equals, executeTask, findLeafs, getAndInitBackupTask, getBackupChildrenTasks, getBackupTask, getChildren, getChildTasks, getConf, getContext, getCounters, getDeferredWorkContext, getDependentTasks, getDiagnosticsMessage, getException, getExternalHandle, getFeedSubscribers, getHive, getId, getInitialized, getJobID, getMapWork, getNumChild, getNumParent, getParentTasks, getQueryPlan, getQueryState, getQueued, getReducer, getStatusMessage, getTaskHandle, getTaskQueue, getTaskState, getTaskTag, getTopOperators, getTxnMgr, getWork, hashCode, hasReduce, isFetchSource, isLocalMode, isMapRedLocalTask, isMapRedTask, isNotInitialized, isRootTask, isRunnable, pushFeed, removeDependentTask, removeFromChildrenTasks, requireLock, setBackupChildrenTasks, setBackupTask, setChildTasks, setConf, setConsole, setDeferredWorkContext, setDiagnosticMessage, setDone, setException, setFeedSubscribers, setFetchSource, setId, setInitialized, setLocalMode, setParentTasks, setQueryDisplay, setQueryPlan, setQueued, setRootTask, setStarted, setState, setStatusMessage, setTaskQueue, setTaskTag, setWork, shutdown, started, subscribeFeed, toString, updateStatusInQueryDisplay, updateTaskMetrics

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

StatsTask

public StatsTask()

Method Detail

initialize

public void initialize(QueryState queryState,
                       QueryPlan queryPlan,
                       TaskQueue taskQueue,
                       Context context)

Overrides:

initialize in class Task<StatsWork>

execute

public int execute()

Description copied from class: Task

This method is overridden in each Task. TODO execute should return a TaskHandle.

Specified by:

execute in class Task<StatsWork>

Returns:

status of executing the task

getType

public StageType getType()

Description copied from class: Task

Should be overridden to return the type of the specific task among the types in StageType.

Specified by:

getType in class Task<StatsWork>

Returns:

StageType.* or null if not overridden

getName

public String getName()

Specified by:

getName in interface Node

receiveFeed

protected void receiveFeed(Task.FeedType feedType,
                           Object feedValue)

Overrides:

receiveFeed in class Task<StatsWork>

newThreadPool

public static ExecutorService newThreadPool(HiveConf conf)