montodesktopcalculator.MontoManager.java Source code

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Here is the source code for montodesktopcalculator.MontoManager.java

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/*
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package montodesktopcalculator;

import org.json.simple.JSONObject;
import org.json.simple.JSONValue;
import org.zeromq.ZMQ;

/**
 *
 * @author charlie
 */
public class MontoManager {
    private static boolean isConnected = false;
    private static ZMQ.Context context;
    private static ZMQ.Socket fromMonto;
    private static ZMQ.Socket toMonto;
    private Thread listenerThread;
    private MontoListener listener;

    public MontoManager(MontoListener _listener) {
        listenerThread = null;
        listener = _listener;
    }

    public final void start() {
        connect();
        listenForProducts();
    }

    public final boolean connect() {
        //Connect to monto
        String inConnection = "tcp://127.0.0.1:5003";
        String outConnection = "tcp://127.0.0.1:5000";
        try {
            context = ZMQ.context(1);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        fromMonto = context.socket(ZMQ.SUB);
        toMonto = context.socket(ZMQ.REQ);
        fromMonto.connect(inConnection);
        fromMonto.subscribe(new byte[0]);
        toMonto.connect(outConnection);
        isConnected = true;
        return true;
    }

    public final boolean disconnect() {
        fromMonto.close();
        toMonto.close();
        context.term();
        isConnected = false;
        return true;
    }

    public final void sendMessage(String contents) {
        System.out.println("Sending " + contents);
        JSONObject obj = new JSONObject();
        obj.put("source", "java-frontend");
        obj.put("language", "calc");
        obj.put("contents", contents);
        obj.put("selections", "");
        toMonto.send(obj.toJSONString().getBytes());
        toMonto.recv();
    }

    public final void listenForProducts() {
        if (null != listenerThread) {
            return;
        }
        listenerThread = new Thread(new Runnable() {
            @Override
            public void run() {
                while (isConnected) {
                    System.out.println("Waiting for messages...");
                    if (isConnected) { //Check to make sure we're connected
                        String rawMessage = new String(fromMonto.recv());
                        System.out.println("Got message" + rawMessage);
                        JSONObject message = (JSONObject) JSONValue.parse(rawMessage);
                        listener.onProductRecieved(message.get("contents").toString());
                    } else {
                        System.out.println("Not connected yet.");
                    }
                    try {
                        Thread.sleep(10);
                    } catch (Exception e) {
                    } //Intentionally left blank
                }
            }
        });
        listenerThread.start();
    }
}