org.apache.oozie.command

Class MaterializeTransitionXCommand

java.lang.Object

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

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

org.apache.oozie.command.MaterializeTransitionXCommand

All Implemented Interfaces:

Callable<Void>, XCallable<Void>

Direct Known Subclasses:

CoordMaterializeTransitionXCommand

public abstract class MaterializeTransitionXCommand
extends TransitionXCommand<Void>

Transition command for materialize the job. The derived class has to override these following functions:

loadState() : load the job's and/or actions' state updateJob() : update job status and attributes StartChildren() : submit or queue commands to start children notifyParent() : update the status to upstream if any

Field Summary

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

Constructor Summary

Constructors

Constructor and Description
MaterializeTransitionXCommand(String name, String type, int priority) The constructor for abstract class MaterializeTransitionXCommand
MaterializeTransitionXCommand(String name, String type, int priority, boolean dryrun) The constructor for abstract class MaterializeTransitionXCommand

Method Summary

Modifier and Type	Method and Description
protected Void	execute() Command execution body.
protected abstract void	materialize() Materialize the actions for current job
void	transitToNext() Transit to the next status based on the result of the Job.

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

generateEvents, getJob, notifyParent, performWrites, setJob, updateJob

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

call, eagerLoadState, eagerVerifyPrecondition, executeInterrupts, getCreatedTime, getEntityKey, getInstrumentation, getKey, getLockTimeOut, getLog, getName, getPriority, getRequeueDelay, getType, inInterruptMode, isLockRequired, isReQueueRequired, loadState, queue, queue, resetUsed, setInterruptMode, setLogInfo, toString, verifyPrecondition

Methods inherited from class java.lang.Object

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

Constructor Detail

MaterializeTransitionXCommand

public MaterializeTransitionXCommand(String name,
                                     String type,
                                     int priority)

The constructor for abstract class MaterializeTransitionXCommand

Parameters:

name - the command name

type - the command type

priority - the command priority

MaterializeTransitionXCommand

public MaterializeTransitionXCommand(String name,
                                     String type,
                                     int priority,
                                     boolean dryrun)

The constructor for abstract class MaterializeTransitionXCommand

Parameters:

name - the command name

type - the command type

priority - the command priority

dryrun - true if dryrun is enable

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.

Specified by:

transitToNext in class TransitionXCommand<Void>

Throws:

CommandException

materialize

protected abstract void materialize()
                             throws CommandException

Materialize the actions for current job

Throws:

CommandException - thrown if failed to materialize

execute

protected Void execute()
                throws CommandException

Description copied from class: XCommand

Command execution body.

This method will be invoked after the {link #loadState} and {link #verifyPrecondition} methods.

If the command requires locking, this method will be invoked ONLY if the lock has been acquired.

Overrides:

execute in class TransitionXCommand<Void>

Returns:

a return value from the execution of the command, only meaningful if the command is executed synchronously.

Throws:

CommandException - thrown if the command execution failed.