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package com.benburwell.planes.sbs;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.util.List;
import java.util.ArrayList;
/**
* @author ben
*/
public class TCPDataSource implements DataSource {
private List<DataListener> subscribers = new ArrayList<>();
private String host;
private int port;
private Thread clientThread = null;
private SocketClient client = null;
public TCPDataSource(String host, int port) {
this.host = host;
this.port = port;
}
public void subscribe(DataListener listener) {
this.subscribers.add(listener);
}
public void open() {
this.client = new SocketClient(this.host, this.port);
this.clientThread = new Thread(this.client);
this.clientThread.start();
}
public void close() {
if (this.client != null) {
this.client.terminate();
try {
this.clientThread.join();
} catch (InterruptedException ignored) {}
}
}
private class SocketClient implements Runnable {
private String host;
private int port;
private Socket clientSocket = null;
public SocketClient(String host, int port) {
this.host = host;
this.port = port;
}
public void terminate() {
if (this.clientSocket != null) {
try {
this.clientSocket.close();
} catch (IOException e) {
System.out.println("Got exception closing socket: " + e.getMessage());
}
}
}
@Override
public void run() {
System.out.println("Starting socket client");
BufferedReader socketReader;
try {
this.clientSocket = new Socket(this.host, this.port);
} catch (IOException e) {
System.out.println("Could not connect to " + this.host + " on port " + this.port + ": " + e.getMessage());
return;
}
try {
socketReader = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));
} catch (IOException e) {
System.out.println("Could not create socket reader: " + e.getMessage());
return;
}
String receivedMessage;
while (true) {
try {
receivedMessage = socketReader.readLine();
} catch (IOException e) {
System.out.println("Error reading from socket: " + e.getMessage());
return;
}
try {
SBSPacket packet = new SBSPacket(receivedMessage);
for (DataListener subscriber : subscribers) {
subscriber.handleMessage(packet);
}
} catch (MalformedPacketException e) {
System.out.println("Discarding malformed packet: " + receivedMessage);
System.out.println(e.getMessage());
}
}
}
}
}
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