com.sun.jini.mahalo

Class CommitJob

java.lang.Object

com.sun.jini.mahalo.Job

com.sun.jini.mahalo.CommitJob

All Implemented Interfaces:

TransactionConstants

public class CommitJob
extends Job
implements TransactionConstants

An implementation of a Job which interacts with a set of TransactionParticipants to inform them to roll forward changes associated with a given 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) int	maxtries
(package private) ServerTransaction	tr

Fields inherited from class com.sun.jini.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
CommitJob(Transaction tr, TaskManager pool, WakeupManager wm, ClientLog log, ParticipantHandle[] handles) Constructs an CommitJob

Method Summary

Methods

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

Methods inherited from class com.sun.jini.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

ServerTransaction tr

log

ClientLog log

handles

ParticipantHandle[] handles

maxtries

int maxtries

logger

static final Logger logger

Constructor Detail

CommitJob

public CommitJob(Transaction tr,
         TaskManager pool,
         WakeupManager wm,
         ClientLog log,
         ParticipantHandle[] handles)

Constructs an CommitJob

Parameters:

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

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-forward.

See Also:

TaskManager, ClientLog, TransactionParticipant

Method Detail

doWork

Object doWork(TaskManager.Task 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 CommitJob contacts a participant, instructs it to roll-forward 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

createTasks

TaskManager.Task[] createTasks()

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

Specified by:

createTasks in class Job

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