goofs

Class Message

java.lang.Object

goofs.Message

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

FixCorruptionMessage, FixReplicationMessage, GetFreeMessage, GetHoldersMessage, MajorHeartbeatMessage, MinorHeartbeatMessage, RequestMajorMessage, RequestMinorMessage, RetrieveDataMessage, SubmitDataMessage

public class Message
extends java.lang.Object
implements java.io.Serializable

Generic goofs message.

Author:

Elliott Forney

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Message.Kind Kinds of messages that can be sent in goofs.

Field Summary

Fields

Modifier and Type	Field and Description
protected HostID	dst
Message.Kind	kind This message's kind
protected HostID	src

Constructor Summary

Constructors

Constructor and Description
Message(HostID src, HostID dst, Message.Kind kind) Create a new goofs message.

Method Summary

Modifier and Type	Method and Description
boolean	expectsReply() Determine whether or not this message should attempt to get a reply.
HostID	getDest() Get message destination id.
HostID	getSource() Get message source id.
Message	send() Send this message to its destination and get reply.
void	setDest(HostID dst) Set message destination id.
void	setSource(HostID src) Set message source id.
void	swapSrcDst() Swap message source and destination
java.lang.String	toString() Convert message to a human readable string.

Methods inherited from class java.lang.Object

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

Field Detail

kind

public Message.Kind kind

This message's kind

src

protected HostID src

dst

protected HostID dst

Constructor Detail

Message

public Message(HostID src,
               HostID dst,
               Message.Kind kind)

Create a new goofs message.

Parameters:

src - Message source.

dst - Message destination.

kind - Message kind.

Method Detail

getSource

public HostID getSource()

Get message source id.

setSource

public void setSource(HostID src)

Set message source id.

Parameters:

src - New message source.

getDest

public HostID getDest()

Get message destination id.

setDest

public void setDest(HostID dst)

Set message destination id.

Parameters:

dst - New Message destination.

swapSrcDst

public void swapSrcDst()

Swap message source and destination

expectsReply

public boolean expectsReply()

Determine whether or not this message should attempt to get a reply.

Returns:

True if this message should wait for a reply after it is sent and false otherwise.

send

public Message send()
             throws java.lang.Exception

Send this message to its destination and get reply.

Returns:

Message reply.

Throws:

java.lang.Exception

toString

public java.lang.String toString()

Convert message to a human readable string.

Overrides:

toString in class java.lang.Object

Returns:

Human readible string representing this message.