org.apache.river.mahalo

Class AbortJob

java.lang.Object

org.apache.river.mahalo.Job

org.apache.river.mahalo.AbortJob

All Implemented Interfaces:

TransactionConstants

class AbortJob
extends Job
implements TransactionConstants

An implementation of a org.apache.river.mahalo.Job which interacts with a set of net.jini.core.transaction.server.TransactionParticipants to inform them to roll back changes associated with a given net.jini.core.transaction.Transaction.

Author:

Sun Microsystems, Inc.

See Also:

Job, ParticipantTask, Transaction, TransactionParticipant

Field Summary

Fields

Modifier and Type	Field and Description
(package private) ParticipantHandle[]	handles
(package private) ClientLog	log
(package private) static Logger	logger
(package private) static int	maxtries
(package private) ServerTransaction	tr

Fields inherited from class org.apache.river.mahalo.Job

attempts, results

Fields inherited from interface net.jini.core.transaction.server.TransactionConstants

ABORTED, ACTIVE, COMMITTED, NOTCHANGED, PREPARED, VOTING

Constructor Summary

Constructors

Constructor and Description
AbortJob(Transaction tr, java.util.concurrent.ExecutorService pool, WakeupManager wm, ClientLog log, ParticipantHandle[] handles) Constructs an AbortJob

Method Summary

Modifier and Type	Method and Description
(package private) Object	computeResult() Gathers partial results submitted by tasks and produces a single outcome.
(package private) Runnable[]	createTasks() Creates the TaskManager.Tasks necessary to inform participants to roll-back.
(package private) Object	doWork(Runnable who, Object param) The work to be performed by each TaskManager.Task is provided by the Job that creates it.

Methods inherited from class org.apache.river.mahalo.Job

attempt, getMgr, getPool, isCompleted, performWork, scheduleTasks, stop

Methods inherited from class java.lang.Object

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

Field Detail

tr

final ServerTransaction tr

log

final ClientLog log

handles

final ParticipantHandle[] handles

maxtries

static final int maxtries

See Also:

Constant Field Values

logger

static final Logger logger

Constructor Detail

AbortJob

public AbortJob(Transaction tr,
                java.util.concurrent.ExecutorService pool,
                WakeupManager wm,
                ClientLog log,
                ParticipantHandle[] handles)

Constructs an AbortJob

Parameters:

tr - The Transaction whose participants will be instructed to roll-back.

pool - The TaskManager which provides the threads used for interacting with participants.

log - The ClientLog used for recording recovery data.

handles - The array of participants which will be contacted and informed to roll-back.

See Also:

TaskManager, ClientLog, TransactionParticipant

Method Detail

createTasks

Runnable[] createTasks()

Creates the TaskManager.Tasks necessary to inform participants to roll-back.

Specified by:

createTasks in class Job

doWork

Object doWork(Runnable who,
              Object param)

The work to be performed by each TaskManager.Task is provided by the Job that creates it. The work performed by a task belonging to the AbortJob contacts a participant, instructs it to roll-back and log appropriately.

Specified by:

doWork in class Job

Parameters:

who - The task performing the work

param - A parameter, of the task's choosing, useful in performing work.

See Also:

Job, TaskManager.Task

computeResult

Object computeResult()
              throws JobException

Gathers partial results submitted by tasks and produces a single outcome.

Specified by:

computeResult in class Job

Throws:

JobException

See Also:

Job