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 classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.Task |
Task.FeedType |
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, LOCAL_MAPJOIN, LOG, NO_TAG, parentTasks, queryPlan, queued, started, taskCounters, taskHandle, taskTag, work |
Method Summary |
static void |
cleanUp(String jobID,
org.apache.hadoop.conf.Configuration config)
This method is static as it is called from the shutdown hook at the ExecDriver. |
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). |
protected void |
receiveFeed(Task.FeedType feedType,
Object feedValue)
|
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, getParentTasks, getQueued, getTaskTag, getWork, hasReduce, initialize, isLocalMode, isMapRedLocalTask, isMapRedTask, isRunnable, localizeMRTmpFiles, pushFeed, removeDependentTask, removeFromChildrenTasks, setBackupChildrenTasks, setBackupTask, setChildTasks, setDone, setFeedSubscribers, setId, setInitialized, setLocalMode, setParentTasks, setQueued, setStarted, setTaskTag, setWork, started, subscribeFeed |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
StatsTask
public StatsTask()
receiveFeed
protected void receiveFeed(Task.FeedType feedType,
Object feedValue)
- Overrides:
receiveFeed
in class Task<StatsWork>
execute
public 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<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()
- Description copied from interface:
Node
- Gets the name of the node. This is used in the rule dispatchers.
- Specified by:
getName
in interface Node
- Returns:
- String
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<StatsWork>
- Parameters:
ctx
- context object with which to localize
cleanUp
public static void cleanUp(String jobID,
org.apache.hadoop.conf.Configuration config)
- This method is static as it is called from the shutdown hook at the ExecDriver.
Copyright © 2011 The Apache Software Foundation