/** Handle a connection DROP_DOWN request from the FE. */
protected void handleDropDown(Connection c, JICPPacket pkt, InetAddress addr, int port) {
if (myLogger.isLoggable(Logger.INFO)) {
myLogger.log(Logger.INFO, myID + ": DROP_DOWN request received.");
}
try {
// If the INP connection is down or we have some postponed command
// to flush, refuse dropping the connection
if (inpManager.isConnected() && inpManager.isEmpty()) {
JICPPacket rsp =
new JICPPacket(JICPProtocol.RESPONSE_TYPE, JICPProtocol.DEFAULT_INFO, null);
c.writePacket(rsp);
inpManager.resetConnection();
outManager.resetConnection();
connectionDropped = true;
} else {
myLogger.log(Logger.WARNING, myID + ": DROP_DOWN request refused.");
JICPPacket rsp = new JICPPacket(JICPProtocol.ERROR_TYPE, getReconnectInfo(), null);
c.writePacket(rsp);
}
} catch (Exception e) {
myLogger.log(Logger.WARNING, myID + ": Error writing DROP_DOWN response. " + e);
}
}
/** Slet en person baseret på ID */
private void deletePerson() {
int ID = inputManager.inputInteger("Indtast ID: ");
if (personCtr.deletePerson(ID)) {
inputManager.setLastAction("Person med ID " + ID + " er slettet");
} else {
inputManager.setLastAction("Person med ID " + ID + " blev ikke fundet");
}
}
/** Finder en Person baseret på ID */
private void findPerson() {
int requestID = inputManager.inputInteger("Indtast ID for person du ønsker at finde: ");
if (personCtr.findPerson(requestID) != null) {
Person person = personCtr.findPerson(requestID);
inputManager.setLastAction("Der er fundet en person med navn: " + person.getName());
} else {
inputManager.setLastAction("Det lykkedes ikke at finde en person med ID: " + requestID);
}
}
/** Opretter en Person */
private void createPerson() {
String name = inputManager.inputString("Navn: ", false);
int phone = inputManager.inputInteger("Telefon nr.:");
String address = inputManager.inputString("Adresse: ", false);
String city = inputManager.inputString("By:", false);
// Opretter en ny person i model laget igennem kontrol laget
Person p =
personCtr.createCustomer(name, phone, address, city, ModelLayer.Customer.Type.PRIVATE);
if (p != null) {
inputManager.setLastAction("Der er oprettet en ny kunde med ID: " + p.getID());
} else {
System.out.println("Det lykkedes ikke at oprette en ny kunde");
}
}
/**
* This is periodically called by the JICPMediatorManager and is used by this NIOMediator to
* evaluate the elapsed time without the need of a dedicated thread or timer.
*/
public final void tick(long currentTime) {
if (active && !connectionDropped) {
// 1) If there is a blocking read operation in place check the
// response timeout
inpManager.checkResponseTime(currentTime);
// 2) Evaluate the keep alive
if (keepAliveTime > 0) {
if ((currentTime - lastReceivedTime) > (keepAliveTime + RESPONSE_TIMEOUT)) {
// Missing keep-alive.
// The OUT connection is no longer valid
if (outManager.isConnected()) {
myLogger.log(Logger.WARNING, myID + ": Missing keep-alive");
outManager.resetConnection();
}
// Check the INP connection. Since this method must return
// asap, does it in a separated Thread
if (inpManager.isConnected()) {
Thread t =
new Thread() {
public void run() {
try {
// JICPPacket pkt = new JICPPacket(JICPProtocol.KEEP_ALIVE_TYPE,
// JICPProtocol.DEFAULT_INFO, null);
// inpManager.dispatch(pkt, false);
inpManager.sendServerKeepAlive();
if (myLogger.isLoggable(Logger.CONFIG)) {
myLogger.log(Logger.CONFIG, myID + ": IC valid");
}
} catch (Exception e) {
// Just do nothing: the INP connection has been reset
}
}
};
t.start();
}
}
}
// 3) Evaluate the max disconnection time
if (outManager.checkMaxDisconnectionTime(currentTime)) {
myLogger.log(Logger.SEVERE, myID + ": Max disconnection time expired.");
// Consider as if the FrontEnd has terminated spontaneously -->
// Kill the above container (this will also kill this NIOBEDispatcher).
kill();
}
}
}
private final byte getReconnectInfo() {
byte info = JICPProtocol.DEFAULT_INFO;
// If the inpConnection is null request the FrontEnd to reconnect
if (!inpManager.isConnected()) {
info |= JICPProtocol.RECONNECT_INFO;
}
return info;
}
/**
* Notify this NIOMediator that an error occurred on one of the Connections it was using. This
* information is important since, unlike normal mediators, a NIOMediator typically does not read
* packets from connections on its own (the JICPMediatorManager does that in general).
*/
public void handleConnectionError(Connection c, Exception e) {
myLogger.log(Level.WARNING, "connection error", e);
if (active && peerActive) {
// Try assuming it is the input connection
try {
inpManager.checkConnection(c);
myLogger.log(Logger.WARNING, myID + ": IC Disconnection detected");
inpManager.resetConnection();
} catch (ICPException icpe) {
// Then try assuming it is the output connection
try {
outManager.checkConnection(c);
myLogger.log(Logger.WARNING, myID + ": OC Disconnection detected");
outManager.resetConnection();
} catch (ICPException icpe2) {
// Ignore it
}
}
}
}
/** Make this NIOBEDispatcher terminate. */
public void shutdown() {
active = false;
if (myLogger.isLoggable(Logger.INFO)) {
myLogger.log(Logger.INFO, myID + ": shutting down");
}
// Deregister from the JICPServer
if (myID != null) {
myMediatorManager.deregisterMediator(myID);
}
inpManager.shutdown();
outManager.shutdown();
}
/** Printer Person menuen og returnere dit valg */
private int printPersonMenu() {
inputManager.clearConsole();
Scanner keyboard = new Scanner(System.in);
System.out.println("Sidste handling: " + inputManager.getLastAction());
System.out.println(" Person Menu");
System.out.println("");
System.out.println(" (1) Opret Person");
System.out.println(" (2) Find Person");
System.out.println(" (3) Opdater Person");
System.out.println(" (4) Slet Person");
System.out.println(" (0) Gå tilbage til hovedmenu");
System.out.println("\n Vælg en af disse: ");
System.out.println("");
int choise;
while (!keyboard.hasNextInt()) {
System.out.println("Det er ikke et tal!");
keyboard.next();
}
choise = keyboard.nextInt();
return choise;
}
//////////////////////////////////////////
// Dispatcher interface implementation
//////////////////////////////////////////
public byte[] dispatch(byte[] payload, boolean flush) throws ICPException {
if (connectionDropped) {
// Move from DROPPED state to DISCONNECTED state and wait
// for the FE to reconnect
droppedToDisconnected();
requestRefresh();
throw new ICPException("Connection dropped");
} else {
// Normal dispatch
JICPPacket pkt =
new JICPPacket(JICPProtocol.COMMAND_TYPE, JICPProtocol.DEFAULT_INFO, payload);
pkt = inpManager.dispatch(pkt, flush);
return pkt.getData();
}
}
/** Denne metode bruges til at ændre i variablerne knyttet til en person i personContainer */
private void updatePerson() {
int ID = inputManager.inputInteger("Indtast ID for person: ");
if (personCtr.findPerson(ID) != null) {
Person person = personCtr.findPerson(ID);
// Print nuv�rerende info om person
System.out.println(
"\n"
+ "Der er fundet en person: "
+ person.getName()
+ "\n"
+ "Telefon: "
+ person.getPhone()
+ "\n"
+ "Adresse: "
+ person.getAddress()
+ "\n"
+ "By: "
+ person.getCity());
// Modtag input for nye info om person
String name = inputManager.inputString("Navn ændres til: ", false);
int tlf = inputManager.inputInteger("Telefon nr ændres til: ");
String adresse = inputManager.inputString("Adresse ændres til:", false);
String by = inputManager.inputString("By ændres til: ", false);
// Opdater person info
Person updatePerson = personCtr.updatePerson(name, tlf, adresse, by, person, ID);
// Skriv i konsollen
inputManager.setLastAction(
"Der er opdateret en kunde: "
+ updatePerson.getName()
+ "\n"
+ "Telefon: "
+ updatePerson.getPhone()
+ "\n"
+ "Adresse: "
+ updatePerson.getAddress()
+ "\n"
+ "By: "
+ updatePerson.getCity());
} else {
inputManager.setLastAction("Det lykkedes ikke at opdater info om en kunde!");
}
}
/**
* Overloaded version of the handleJICPPacket() method including the <code>Connection</code> the
* incoming JICPPacket was received from. This information is important since, unlike normal
* mediators, a NIOMediator may not read packets from connections on its own (the
* JICPMediatorManager does that in general).
*/
public JICPPacket handleJICPPacket(Connection c, JICPPacket pkt, InetAddress addr, int port)
throws ICPException {
if (pkt.getType() == JICPProtocol.DROP_DOWN_TYPE) {
// Note that the return packet is written inside the handleDropDown()
// method since the connection must be closed after the response has
// been sent back.
handleDropDown(c, pkt, addr, port);
return null;
}
checkTerminatedInfo(pkt);
// Update keep-alive info
lastReceivedTime = System.currentTimeMillis();
byte type = pkt.getType();
if (type == JICPProtocol.COMMAND_TYPE) {
if (peerActive) {
return outManager.handleCommand(c, pkt);
} else {
// The remote FrontEnd has terminated spontaneously -->
// Kill the above container (this will also kill this NIOBEDispatcher).
kill();
return null;
}
} else if (type == JICPProtocol.KEEP_ALIVE_TYPE) {
if (enableServerKeepAlive) {
inpManager.sendServerKeepAlive();
}
return outManager.handleKeepAlive(c, pkt);
} /* Asynch-reply
else if (type == JICPProtocol.RESPONSE_TYPE || type == JICPProtocol.ERROR_TYPE) {
inpManager.handleResponse(c, pkt);
return null;
}*/ else {
throw new ICPException("Unexpected packet type " + type);
}
}
/**
* Passes to this JICPMediator the connection opened by the mediated entity. This is called by the
* JICPMediatorManager this Mediator is attached to as soon as the mediated entity (re)connects.
*
* @param c the connection to the mediated entity
* @param pkt the packet that was sent by the mediated entity when opening this connection
* @param addr the address of the mediated entity
* @param port the local port used by the mediated entity
* @return an indication to the JICPMediatorManager to keep the connection open.
*/
public boolean handleIncomingConnection(
Connection c, JICPPacket pkt, InetAddress addr, int port) {
checkTerminatedInfo(pkt);
if (peerActive) {
if (connectionDropped) {
droppedToDisconnected();
}
// Update keep-alive info
lastReceivedTime = System.currentTimeMillis();
boolean inp = false;
byte[] data = pkt.getData();
if (data.length == 1) {
inp = (data[0] == 1);
}
if (inp) {
inpManager.setConnection((NIOJICPConnection) c);
if (myLogger.isLoggable(Logger.CONFIG)) {
myLogger.log(Logger.CONFIG, myID + ": New INP Connection establishd");
}
} else {
outManager.setConnection(c);
if (myLogger.isLoggable(Logger.CONFIG)) {
myLogger.log(Logger.CONFIG, myID + ": New OUT Connection establishd");
}
}
return true;
} else {
// The remote FrontEnd has terminated spontaneously -->
// Kill the above container (this will also kill this NIOBEDispatcher).
kill();
return false;
}
}
/**
* Make this HTTPFEDispatcher terminate. Note that when the BackEnd receives the termination
* notification (explicitly sent in case of a self-initiated shutdown or attached to the response
* to the EXIT command), it closes the input connection. The InputManager gets an exception and,
* since it has been killed, terminates.
*/
public void shutdown() {
terminator = Thread.currentThread();
myLogger.log(
Logger.INFO,
"Dispatcher shutting down. Self-initiated = " + (terminator != myInputManager));
if (terminator != myInputManager) {
// Self-initiated shut down
// If connected, explicitly notify the BackEnd.
if (myDisconnectionManager.isReachable()) {
JICPPacket pkt =
new JICPPacket(JICPProtocol.COMMAND_TYPE, (byte) (JICPProtocol.DEFAULT_INFO), null);
myLogger.log(Logger.INFO, "Pushing termination notification");
try {
deliver(pkt);
} catch (IOException ioe) {
// When the BackEnd receives the termination notification,
// it just closes the connection --> we always have this exception
myLogger.log(Logger.FINE, "BackEnd closed");
}
}
// Kill the InputManager
myInputManager.kill();
}
}
@Override
public void update(GameManager gameManager) {
if (!this.enabled) {
return;
}
InputManager inputManager = gameManager.getInputManager();
if (inputManager.eventHasOccurred()) {
float x = inputManager.getTouchX(), y = inputManager.getTouchY();
if (inputManager.downOccurred()) {
this.btDown = (x > this.x && x < this.x + this.w && y > this.y && y < this.y + this.h);
}
if (inputManager.moveOccurred()) {
this.btDown =
this.btDown & (x > this.x && x < this.x + this.w && y > this.y && y < this.y + this.h);
}
if (inputManager.upOccurred()) {
if (this.btDown) {
this.btDown = false;
this.onClick(gameManager);
}
}
}
}
/** Create a BackEnd in the fixed network and return a stub to communicate with it */
public BackEnd getBackEnd(FrontEnd fe, Properties p) throws IMTPException {
props = p;
beAddrsText = props.getProperty(FrontEnd.REMOTE_BACK_END_ADDRESSES);
backEndAddresses = parseBackEndAddresses(beAddrsText);
// Host
String host = props.getProperty("host");
if (host == null) {
host = "localhost";
}
// Port
int port = JICPProtocol.DEFAULT_PORT;
try {
port = Integer.parseInt(props.getProperty("port"));
} catch (NumberFormatException nfe) {
// Use default
}
// Compose URL. Note that we build a JICPAddress just to avoid loading the HTTPAddress class.
mediatorTA = JICPProtocol.getInstance().buildAddress(host, String.valueOf(port), null, null);
// Mediator class
String tmp = props.getProperty(JICPProtocol.MEDIATOR_CLASS_KEY);
if (tmp != null) {
myMediatorClass = tmp;
} else {
// Set the default mediator class since this must be propagated to the mediator.
props.setProperty(JICPProtocol.MEDIATOR_CLASS_KEY, myMediatorClass);
}
// Read re-connection retry time
long retryTime = JICPProtocol.DEFAULT_RETRY_TIME;
try {
retryTime = Long.parseLong(props.getProperty(JICPProtocol.RECONNECTION_RETRY_TIME_KEY));
} catch (Exception e) {
// Use default
}
// Read Max disconnection time
maxDisconnectionTime = JICPProtocol.DEFAULT_MAX_DISCONNECTION_TIME;
try {
maxDisconnectionTime =
Long.parseLong(props.getProperty(JICPProtocol.MAX_DISCONNECTION_TIME_KEY));
} catch (Exception e) {
// Use default
props.setProperty(
JICPProtocol.MAX_DISCONNECTION_TIME_KEY, String.valueOf(maxDisconnectionTime));
}
// Read Keep-alive time
keepAliveTime = JICPProtocol.DEFAULT_KEEP_ALIVE_TIME;
try {
keepAliveTime = Long.parseLong(props.getProperty(JICPProtocol.KEEP_ALIVE_TIME_KEY));
} catch (Exception e) {
// Use default
props.setProperty(JICPProtocol.KEEP_ALIVE_TIME_KEY, String.valueOf(keepAliveTime));
}
if (myLogger.isLoggable(Logger.CONFIG)) {
myLogger.log(Logger.CONFIG, "Remote URL = http://" + host + ":" + port);
myLogger.log(Logger.CONFIG, "Mediator class = " + myMediatorClass);
myLogger.log(Logger.CONFIG, "Reconnection retry time = " + retryTime);
myLogger.log(Logger.CONFIG, "Max disconnection time = " + maxDisconnectionTime);
myLogger.log(Logger.CONFIG, "Keep-alive time = " + keepAliveTime);
}
myDisconnectionManager = new DisconnectionManager(retryTime, maxDisconnectionTime);
myKeepAliveManager = new KeepAliveManager(keepAliveTime);
myInputManager = new InputManager();
// Read the owner if any
owner = props.getProperty("owner");
// Create the BackEnd stub and the FrontEnd skeleton
myStub = new BackEndStub(this);
mySkel = new FrontEndSkel(fe);
// Start the InputManager
myInputManager.start();
// Create the remote BackEnd
createBackEnd();
return myStub;
}
// Maps the escape key to the gameaction escape
public void createGameActions() {
exit = new GameAction("exit", GameAction.DETECT_INITAL_PRESS_ONLY);
inputManager.mapToKey(exit, KeyEvent.VK_ESCAPE);
}
/**
* Return a stub of the remote FrontEnd that is connected to the local BackEnd.
*
* @param be The local BackEnd
* @param props Additional (implementation dependent) connection configuration properties.
* @return A stub of the remote FrontEnd.
*/
public FrontEnd getFrontEnd(BackEnd be, Properties props) throws IMTPException {
return inpManager.getStub();
}
public boolean isConnected() {
return inpManager.isConnected() && outManager.isConnected();
}
/** Kontruktøren der kalder inputManageren samt person controlleren */
public PersonUI() {
personCtr = new PersonCtr();
inputManager = InputManager.getInstance();
}
