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/*
* VS is (c) 2008 by Paul C. Buetow
* vs@dev.buetow.org
*/
package protocols;
import events.internal.*;
import events.*;
import core.*;
/**
* The Class VSAbstractProtocol.
*/
abstract public class VSAbstractProtocol extends VSAbstractEvent {
private static final long serialVersionUID = 1L;
/** The protocol object is a server. */
private boolean isServer;
/** The protocol object is a client. */
private boolean isClient;
/** The current protocol object's context is a server. */
private boolean currentContextIsServer;
/**
* Send a message.
*
* @param message the message to send
*/
protected void sendMessage(VSMessage message) {
if (process == null)
return;
process.increaseLamportTime();
process.increaseVectorTime();
message.init(process, getClassname());
process.sendMessage(message);
}
/**
* Checks if it's the incorrect protocol
*
* @param message the message to check against
*
* @return true, if is incorrect protocol
*/
private final boolean isIncorrectProtocol(VSMessage message) {
return !message.getProtocolClassname().equals(getClassname());
}
/* (non-Javadoc)
* @see events.VSAbstractEvent#onStart()
*/
public final void onStart() {
if (isClient) {
currentContextIsServer = false;
onClientStart();
}
}
/**
* Runs a client schedule
*/
public final void onClientScheduleStart() {
if (isClient) {
currentContextIsServer = false;
onClientSchedule();
}
}
/**
* Runs a server schedule
*/
public final void onServerScheduleStart() {
if (isServer) {
currentContextIsServer = true;
onServerSchedule();
}
}
/**
* On message recv.
*
* @param message the message
*/
public final void onMessageRecvStart(VSMessage message) {
if (isIncorrectProtocol(message))
return;
if (isServer) {
currentContextIsServer = true;
onServerRecv(message);
}
if (isClient) {
currentContextIsServer = false;
onClientRecv(message);
}
}
/**
* Sets if is server.
*
* @param isServer the is server
*/
public final void isServer(boolean isServer) {
this.isServer = isServer;
}
/**
* Checks if is server.
*
* @param isServer the is server
*/
public final boolean isServer() {
return isServer;
}
/**
* Sets if is client.
*
* @param isClient the is client
*/
public final void isClient(boolean isClient) {
this.isClient = isClient;
}
/**
* Checks if is client.
*
* @param isClient the is client
*/
public final boolean isClient() {
return isClient;
}
/**
* Reset.
*/
public void reset() {
if (isServer) {
currentContextIsServer = true;
isServer = false;
onServerReset();
}
if (isClient) {
currentContextIsServer = false;
isClient = false;
onClientReset();
}
}
/**
* Reschedules the protocol for a new time and runs onClientSchedule or onServerSchedule
*
* @param isClient the is client
*/
protected final void scheduleAt(long time) {
VSAbstractEvent scheduleEvent = new ProtocolScheduleEvent(this, currentContextIsServer);
VSTask scheduleTask = new VSTask(time, process, scheduleEvent, VSTask.LOCAL);
process.getSimulationCanvas().getTaskManager().addTask(scheduleTask);
}
/**
* On client start.
*/
abstract protected void onClientStart();
/**
* On client reset.
*/
abstract protected void onClientReset();
/**
* On client schedule.
*/
abstract protected void onClientSchedule();
/**
* On client recv.
*
* @param message the message
*/
abstract protected void onClientRecv(VSMessage message);
/**
* On server reset.
*/
abstract protected void onServerReset();
/**
* On server recv.
*
* @param message the message
*/
abstract protected void onServerRecv(VSMessage message);
/**
* On server schedule.
*/
abstract protected void onServerSchedule();
/**
* Gets the num processes.
*
* @return the num processes
*/
protected int getNumProcesses() {
if (process == null)
return 0;
return process.getSimulationCanvas().getNumProcesses();
}
/* (non-Javadoc)
* @see prefs.VSPrefs#toString()
*/
public String toString() {
if (process == null)
return "";
StringBuffer buffer = new StringBuffer();
buffer.append(prefs.getString("lang.protocol"));
buffer.append(": ");
buffer.append(getShortname());
buffer.append(" ");
if (currentContextIsServer)
buffer.append(prefs.getString("lang.server"));
else
buffer.append(prefs.getString("lang.client"));
return buffer.toString();
}
}
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