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Add message parameters to discovery method, and add close method

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This commit is contained in:
Yohan Simard 2020-12-02 10:14:07 +01:00
parent f4f32cc0bc
commit 1a5a62f11f
4 changed files with 58 additions and 23 deletions
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1
build.gradle
View file

@ -17,6 +17,7 @@ javafx {
}
dependencies {
implementation 'org.jetbrains:annotations:20.1.0'
runtimeOnly "org.openjfx:javafx-graphics:$javafx.version:win"
runtimeOnly "org.openjfx:javafx-graphics:$javafx.version:linux"
runtimeOnly "org.openjfx:javafx-graphics:$javafx.version:mac"

15
src/main/java/fr/insa/clavardator/MainApp.java
View file

@ -1,6 +1,8 @@
package fr.insa.clavardator;
import fr.insa.clavardator.network.NetDiscoverer;
import fr.insa.clavardator.ui.MainController;
import fr.insa.clavardator.util.ErrorHandler;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
@ -32,6 +34,19 @@ public class MainApp extends Application {
stage.setMinWidth(800);
stage.setMaximized(true);
stage.show();
// Network discovery test
ErrorHandler.getInstance().addObserver(evt -> ((Exception)evt.getNewValue()).printStackTrace());
NetDiscoverer.discoverActiveUsers("Broadcast",
(ipAddr, data) -> System.out.println("User detected at address : " + ipAddr.toString())
);
NetDiscoverer.startDiscoveryListening("Yohan", null);
}
@Override
public void stop() throws Exception {
NetDiscoverer.stopDiscovery();
super.stop();
}
}

63
src/main/java/fr/insa/clavardator/network/NetDiscoverer.java
View file

@ -1,6 +1,7 @@
package fr.insa.clavardator.network;
import fr.insa.clavardator.util.ErrorHandler;
import org.jetbrains.annotations.Nullable;
import java.io.IOException;
import java.net.*;
@ -12,8 +13,12 @@ import java.util.Objects;
public class NetDiscoverer {
private static final short DISCOVERY_PORT = 31593;
private static final short RESPONSE_PORT = 31594;
public static final int BROADCAST_BUFFER_SIZE = 50;
public static final int RESPONSE_BUFFER_SIZE = 50;
private static final int BROADCAST_BUFFER_SIZE = 50;
private static final int RESPONSE_BUFFER_SIZE = 50;
private static DatagramSocket broadcastListener;
private static DatagramSocket responseListener;
private static boolean shouldStop = false;
private NetDiscoverer() {
}
@ -23,9 +28,9 @@ public class NetDiscoverer {
*
* @param callback function to call when a new user is discovered
*/
public static void discoverActiveUsers(ResponseReceivedCallback callback) {
public static void discoverActiveUsers(String broadcastMessage, ResponseReceivedCallback callback) {
ResponseListener receiver = new ResponseListener(callback);
BroadcastSender sender = new BroadcastSender("USER_DISCOVERY_BROADCAST");
BroadcastSender sender = new BroadcastSender(broadcastMessage);
receiver.start();
sender.start();
}
@ -33,13 +38,24 @@ public class NetDiscoverer {
/**
* Starts to listen for discovery broadcasts and answers them
*/
public static void startDiscoveryListening() {
BroadcastListener listener = new BroadcastListener(
(ipAddr, data) -> new ResponseSender(ipAddr, "USER_DISCOVERY_RESPONSE").start()
public static void startDiscoveryListening(String responseMessage, @Nullable BroadcastReceivedCallback onBroadcastReceived) {
BroadcastListener listener = new BroadcastListener((ipAddr, data) -> {
if (onBroadcastReceived != null)
onBroadcastReceived.onBroadcastReceived(ipAddr, data);
new ResponseSender(ipAddr, responseMessage).start();
}
);
listener.start();
}
public static void stopDiscovery() {
shouldStop = true;
if (broadcastListener != null)
broadcastListener.close();
if (responseListener != null)
responseListener.close();
}
private static class BroadcastSender extends Thread {
String broadcastMessage;
@ -79,22 +95,23 @@ public class NetDiscoverer {
@Override
public void run() {
while (true) { // TODO: add a stop condition
while (!shouldStop) {
try {
DatagramSocket listener = new DatagramSocket(null);
listener.setOption(StandardSocketOptions.SO_REUSEPORT, true);
listener.setOption(StandardSocketOptions.SO_REUSEADDR, true);
listener.bind(new InetSocketAddress((InetAddress) null, DISCOVERY_PORT));
broadcastListener = new DatagramSocket(null);
broadcastListener.setOption(StandardSocketOptions.SO_REUSEPORT, true);
broadcastListener.setOption(StandardSocketOptions.SO_REUSEADDR, true);
broadcastListener.bind(new InetSocketAddress((InetAddress) null, DISCOVERY_PORT));
byte[] buffer = new byte[BROADCAST_BUFFER_SIZE];
DatagramPacket receivedPacket = new DatagramPacket(buffer, BROADCAST_BUFFER_SIZE);
listener.receive(receivedPacket);
broadcastListener.receive(receivedPacket);
// System.out.println("broadcast received from " + receivedPacket.getAddress().toString());
callback.onBroadcastReceived(receivedPacket.getAddress(), new String(receivedPacket.getData()));
} catch (IOException e) {
e.printStackTrace();
ErrorHandler.getInstance().notifyError(e);
if (!shouldStop) {
ErrorHandler.getInstance().notifyError(e);
}
}
}
}
@ -136,20 +153,22 @@ public class NetDiscoverer {
@Override
public void run() {
while (true) { // TODO: add a stop condition
while (!shouldStop) {
try {
DatagramSocket listener = new DatagramSocket(null);
listener.setOption(StandardSocketOptions.SO_REUSEPORT, true);
listener.setOption(StandardSocketOptions.SO_REUSEADDR, true);
listener.bind(new InetSocketAddress((InetAddress) null, RESPONSE_PORT));
responseListener = new DatagramSocket(null);
responseListener.setOption(StandardSocketOptions.SO_REUSEPORT, true);
responseListener.setOption(StandardSocketOptions.SO_REUSEADDR, true);
responseListener.bind(new InetSocketAddress((InetAddress) null, RESPONSE_PORT));
byte[] buffer = new byte[RESPONSE_BUFFER_SIZE];
DatagramPacket receivedPacket = new DatagramPacket(buffer, RESPONSE_BUFFER_SIZE);
listener.receive(receivedPacket);
responseListener.receive(receivedPacket);
// System.out.println("response received from " + receivedPacket.getAddress().toString());
callback.onResponseReceived(receivedPacket.getAddress(), new String(receivedPacket.getData()));
} catch (IOException e) {
ErrorHandler.getInstance().notifyError(e);
if (!shouldStop) {
ErrorHandler.getInstance().notifyError(e);
}
}
}
}

2
src/main/java/fr/insa/clavardator/users/UserList.java
View file

@ -48,7 +48,7 @@ public class UserList {
*
*/
public void discoverActiveUsers() {
NetDiscoverer.discoverActiveUsers((ipAddr, data) -> {
NetDiscoverer.discoverActiveUsers("CLAVARDATOR_BROADCAST", (ipAddr, data) -> {
ActiveUser newUser = new ActiveUser(ipAddr);
activeUsers.add(newUser);
pcs.firePropertyChange("activeUsers", null, newUser);