org.apache.oozie.command.wf
Class ReRunXCommand

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


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