org.apache.hadoop.hive.ql.index
Class IndexMetadataChangeTask

java.lang.Object
  org.apache.hadoop.hive.ql.exec.Task<IndexMetadataChangeWork>
      org.apache.hadoop.hive.ql.index.IndexMetadataChangeTask

All Implemented Interfaces:

Serializable, Node

public class IndexMetadataChangeTask
extends Task<IndexMetadataChangeWork>

See Also:

Serialized Form

Nested Class Summary

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

Task.FeedType

Field Summary

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

BACKUP_COMMON_JOIN, backupChildrenTasks, backupTask, childTasks, clonedConf, COMMON_JOIN, conf, console, CONVERTED_LOCAL_MAPJOIN, CONVERTED_MAPJOIN, db, driverContext, feedSubscribers, id, initialized, isdone, jobID, LOCAL_MAPJOIN, LOG, NO_TAG, parentTasks, queryPlan, queued, started, taskCounters, taskHandle, taskTag, work

Constructor Summary

IndexMetadataChangeTask()

Method Summary

protected int	execute(DriverContext driverContext) This method is overridden in each Task.
String	getName() Gets the name of the node.
StageType	getType() Should be overridden to return the type of the specific task among the types in StageType.
protected void	localizeMRTmpFilesImpl(Context ctx) If this task uses any map-reduce intermediate data (either for reading or for writing), localize them (using the supplied Context).

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

addDependentTask, cloneConf, done, executeTask, fetch, getAndInitBackupTask, getBackupChildrenTasks, getBackupTask, getChildren, getChildTasks, getCounters, getDependentTasks, getFeedSubscribers, getId, getInitialized, getJobID, getParentTasks, getQueryPlan, getQueued, getReducer, getResultSchema, getTaskTag, getTopOperators, getWork, hasReduce, ifRetryCmdWhenFail, initialize, isLocalMode, isMapRedLocalTask, isMapRedTask, isRunnable, localizeMRTmpFiles, pushFeed, receiveFeed, removeDependentTask, removeFromChildrenTasks, requireLock, setBackupChildrenTasks, setBackupTask, setChildTasks, setDone, setFeedSubscribers, setId, setInitialized, setLocalMode, setParentTasks, setQueryPlan, setQueued, setRetryCmdWhenFail, setStarted, setTaskTag, setWork, started, subscribeFeed

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexMetadataChangeTask

public IndexMetadataChangeTask()

Method Detail

execute

protected int execute(DriverContext driverContext)

Description copied from class: Task

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

Specified by:

execute in class Task<IndexMetadataChangeWork>

Returns:

status of executing the task

getName

public String getName()

Description copied from interface: Node

Gets the name of the node. This is used in the rule dispatchers.

Returns:

String

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<IndexMetadataChangeWork>

Returns:

StageType.* or null if not overridden

localizeMRTmpFilesImpl

protected void localizeMRTmpFilesImpl(Context ctx)

Description copied from class: Task

If this task uses any map-reduce intermediate data (either for reading or for writing), localize them (using the supplied Context). Map-Reduce intermediate directories are allocated using Context.getMRTmpFileURI() and can be localized using localizeMRTmpFileURI(). This method is declared abstract to force any task code to explicitly deal with this aspect of execution.

Specified by:

localizeMRTmpFilesImpl in class Task<IndexMetadataChangeWork>

Parameters:

ctx - context object with which to localize