org.apache.oozie.command.wf
Class ReRunXCommand

java.lang.Object
  org.apache.oozie.command.XCommand<T>
      org.apache.oozie.command.wf.WorkflowXCommand<Void>
          org.apache.oozie.command.wf.ReRunXCommand

All Implemented Interfaces:

Callable<Void>, XCallable<Void>

public class ReRunXCommand
extends WorkflowXCommand<Void>

This is a RerunXCommand which is used for rerunn.

Field Summary

static String

TO_SKIP

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

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

Constructor Summary

ReRunXCommand(String jobId, org.apache.hadoop.conf.Configuration conf)

Method Summary

protected void	eagerLoadState() Loading the Wfjob and workflow actions.
protected void	eagerVerifyPrecondition() Checks the pre-conditions that are required for workflow to recover - Last run of Workflow should be completed - The nodes that are to be skipped are to be completed successfully in the base run.
protected Void	execute() Command execution body.
String	getEntityKey() Return the entity key for the command.
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	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.wf.WorkflowXCommand

generateEvent, generateEvent, generateEvent

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

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

Methods inherited from class java.lang.Object

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

Field Detail

TO_SKIP

public static final String TO_SKIP

See Also:

Constant Field Values

Constructor Detail

ReRunXCommand

public ReRunXCommand(String jobId,
                     org.apache.hadoop.conf.Configuration conf)

Method Detail

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.

Specified by:

execute in class XCommand<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.

eagerLoadState

protected void eagerLoadState()
                       throws CommandException

Loading the Wfjob and workflow actions. Parses the config and adds the nodes that are to be skipped to the skipped node list

Overrides:

eagerLoadState in class XCommand<Void>

Throws:

CommandException

eagerVerifyPrecondition

protected void eagerVerifyPrecondition()
                                throws CommandException,
                                       PreconditionException

Checks the pre-conditions that are required for workflow to recover - Last run of Workflow should be completed - The nodes that are to be skipped are to be completed successfully in the base run.

Overrides:

eagerVerifyPrecondition in class XCommand<Void>

Throws:

org.apache.oozie.command.CommandException,PreconditionException - On failure of pre-conditions

CommandException - thrown if the precondition is not met.

PreconditionException

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

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