edu.rit.pj.cluster
Class Message

java.lang.Object
  edu.rit.pj.cluster.Message

All Implemented Interfaces:

Externalizable, Serializable

Direct Known Subclasses:

JobBackendMessage, JobFrontendMessage, JobSchedulerMessage

public abstract class Message
extends Object
implements Externalizable

Class Message is the abstract base class for a message sent to a process in the PJ cluster middleware.

See Also:

Serialized Form

Field Summary

static int	FILE_READ_DATA The message tag for a message containing data read from a file.
static int	FILE_WRITE_DATA The message tag for a message containing data to write to a file.
static int	FROM_JOB_BACKEND The message tag for a message from a job backend process.
static int	FROM_JOB_FRONTEND The message tag for a message from a job frontend process.
static int	FROM_JOB_LAUNCHER The message tag for a message from a job launcher process.
static int	FROM_JOB_SCHEDULER The message tag for a message from a job scheduler process.

Constructor Summary

Message()
Construct a new message.

Message(int theTag)
Construct a new message with the given message tag.

Method Summary

int	getTag() Get the message tag to use when sending this message.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Field Detail

FROM_JOB_BACKEND

public static final int FROM_JOB_BACKEND

The message tag for a message from a job backend process.

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Constant Field Values

FROM_JOB_FRONTEND

public static final int FROM_JOB_FRONTEND

The message tag for a message from a job frontend process.

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Constant Field Values

FROM_JOB_LAUNCHER

public static final int FROM_JOB_LAUNCHER

The message tag for a message from a job launcher process.

See Also:

Constant Field Values

FROM_JOB_SCHEDULER

public static final int FROM_JOB_SCHEDULER

The message tag for a message from a job scheduler process.

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Constant Field Values

FILE_WRITE_DATA

public static final int FILE_WRITE_DATA

The message tag for a message containing data to write to a file.

See Also:

Constant Field Values

FILE_READ_DATA

public static final int FILE_READ_DATA

The message tag for a message containing data read from a file.

See Also:

Constant Field Values

Constructor Detail

Message

public Message()

Construct a new message.

Message

public Message(int theTag)

Construct a new message with the given message tag.

Parameters:

theTag - Message tag to use when sending this message.

Method Detail

getTag

public int getTag()

Get the message tag to use when sending this message.

Returns:

Message tag.