org.apache.oozie.command.coord

Class CoordMaterializeTransitionXCommand

java.lang.Object

org.apache.oozie.command.XCommand<T>

org.apache.oozie.command.TransitionXCommand<Void>

org.apache.oozie.command.MaterializeTransitionXCommand

org.apache.oozie.command.coord.CoordMaterializeTransitionXCommand

All Implemented Interfaces:

Callable<Void>, XCallable<Void>

public class CoordMaterializeTransitionXCommand
extends MaterializeTransitionXCommand

Materialize actions for specified start and end time for coordinator job.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONF_DEFAULT_MAX_TIMEOUT Default MAX timeout in minutes, after which coordinator input check will timeout

Fields inherited from class org.apache.oozie.command.TransitionXCommand

insertList, job, updateList

Fields inherited from class org.apache.oozie.command.XCommand

DEFAULT_LOCK_TIMEOUT, DEFAULT_REQUEUE_DELAY, dryrun, eventService, instrumentation, INSTRUMENTATION_GROUP, LOG, logInfo

Constructor Summary

Constructors

Constructor and Description
CoordMaterializeTransitionXCommand(String jobId, int materializationWindow) The constructor for class CoordMaterializeTransitionXCommand

Method Summary

Methods

Modifier and Type	Method and Description
protected void	calcMatdTime() Calculate startMatdTime and endMatdTime from job's start time if next materialized time is null
String	getEntityKey() Return the entity key for the command.
String	getKey() Get command key
protected boolean	isLockRequired() Indicate if the the command requires locking.
protected void	loadState() Load the necessary state to perform the precondition check and to execute the command.
protected void	materialize() Materialize the actions for current job
protected String	materializeActions(boolean dryrun) Create action instances starting from "startMatdTime" to "endMatdTime" and store them into coord action table.
void	notifyParent() This will be used to notify the parent about the status of that perticular job.
void	performWrites() This will be used to perform atomically all the writes within this command.
void	transitToNext() Transit to the next status based on the result of the Job.
void	updateJob() Update the parent job.
protected void	verifyPrecondition() Verify the precondition for the command after a lock has been obtain, just before executing the command.

Methods inherited from class org.apache.oozie.command.MaterializeTransitionXCommand

execute

Methods inherited from class org.apache.oozie.command.TransitionXCommand

generateEvents, getJob, setJob

Methods inherited from class org.apache.oozie.command.XCommand

call, call, eagerLoadState, eagerVerifyPrecondition, executeInterrupts, getCreatedTime, getInstrumentation, getLockTimeOut, getLog, getName, getPriority, getRequeueDelay, getType, inInterruptMode, isReQueueRequired, queue, queue, resetUsed, setInterruptMode, toString

Methods inherited from class java.lang.Object

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

Field Detail

CONF_DEFAULT_MAX_TIMEOUT

public static final String CONF_DEFAULT_MAX_TIMEOUT

Default MAX timeout in minutes, after which coordinator input check will timeout

See Also:

Constant Field Values

Constructor Detail

CoordMaterializeTransitionXCommand

public CoordMaterializeTransitionXCommand(String jobId,
                                  int materializationWindow)

The constructor for class CoordMaterializeTransitionXCommand

Parameters:

jobId - coordinator job id

materializationWindow - materialization window to calculate end time

lookahead - window

Method Detail

transitToNext

public void transitToNext()
                   throws CommandException

Description copied from class: TransitionXCommand

Transit to the next status based on the result of the Job.

Overrides:

transitToNext in class MaterializeTransitionXCommand

Throws:

CommandException

updateJob

public void updateJob()
               throws CommandException

Description copied from class: TransitionXCommand

Update the parent job.

Specified by:

updateJob in class TransitionXCommand<Void>

Throws:

CommandException

performWrites

public void performWrites()
                   throws CommandException

Description copied from class: TransitionXCommand

This will be used to perform atomically all the writes within this command.

Specified by:

performWrites in class TransitionXCommand<Void>

Throws:

CommandException

getEntityKey

public String getEntityKey()

Description copied from class: XCommand

Return the entity key for the command.

Specified by:

getEntityKey in interface XCallable<Void>

Specified by:

getEntityKey in class XCommand<Void>

Returns:

the entity key for the command.

isLockRequired

protected boolean isLockRequired()

Description copied from class: XCommand

Indicate if the the command requires locking.

Subclasses should override this method if they require locking.

Specified by:

isLockRequired in class XCommand<Void>

Returns:

true/false

loadState

protected void loadState()
                  throws CommandException

Description copied from class: XCommand

Load the necessary state to perform the precondition check and to execute the command.

Subclasses must implement this method and load the state needed to do the precondition check and execute the command.

Specified by:

loadState in class XCommand<Void>

Throws:

CommandException

calcMatdTime

protected void calcMatdTime()
                     throws CommandException

Calculate startMatdTime and endMatdTime from job's start time if next materialized time is null

Throws:

CommandException - thrown if failed to calculate startMatdTime and endMatdTime

verifyPrecondition

protected void verifyPrecondition()
                           throws CommandException,
                                  PreconditionException

Description copied from class: XCommand

Verify the precondition for the command after a lock has been obtain, just before executing the command.

Specified by:

verifyPrecondition in class XCommand<Void>

Throws:

CommandException - thrown if the precondition is not met.

PreconditionException

materialize

protected void materialize()
                    throws CommandException

Description copied from class: MaterializeTransitionXCommand

Materialize the actions for current job

Specified by:

materialize in class MaterializeTransitionXCommand

Throws:

CommandException - thrown if failed to materialize

materializeActions

protected String materializeActions(boolean dryrun)
                             throws Exception

Create action instances starting from "startMatdTime" to "endMatdTime" and store them into coord action table.

Parameters:

dryrun - if this is a dry run

Throws:

Exception - thrown if failed to materialize actions

getKey

public String getKey()

Description copied from class: XCommand

Get command key

Specified by:

getKey in interface XCallable<Void>

Overrides:

getKey in class XCommand<Void>

Returns:

command key

notifyParent

public void notifyParent()
                  throws CommandException

Description copied from class: TransitionXCommand

This will be used to notify the parent about the status of that perticular job.

Specified by:

notifyParent in class TransitionXCommand<Void>

Throws:

CommandException