| package com.datatorrent.contrib.zmq; |
| |
| import java.util.HashMap; |
| |
| import org.zeromq.ZMQ; |
| |
| |
| final class ZeroMQMessageReceiver implements Runnable |
| { |
| public HashMap<String, Integer> dataMap = new HashMap<String, Integer>(); |
| public int count = 0; |
| protected ZMQ.Context context; |
| protected ZMQ.Socket subscriber; |
| protected ZMQ.Socket syncclient; |
| volatile boolean shutDown = false; |
| |
| private static org.slf4j.Logger logger; |
| |
| public ZeroMQMessageReceiver(org.slf4j.Logger loggerInstance) |
| { |
| logger = loggerInstance; |
| } |
| |
| public void setup() |
| { |
| context = ZMQ.context(1); |
| logger.debug("Subsribing on ZeroMQ"); |
| subscriber = context.socket(ZMQ.SUB); |
| subscriber.connect("tcp://localhost:5556"); |
| subscriber.subscribe("".getBytes()); |
| syncclient = context.socket(ZMQ.REQ); |
| syncclient.connect("tcp://localhost:5557"); |
| sendSync(); |
| } |
| |
| public void sendSync() |
| { |
| syncclient.send("".getBytes(), 0); |
| } |
| |
| @Override |
| public void run() |
| { |
| logger.debug("receiver running"); |
| while (!Thread.currentThread().isInterrupted() && !shutDown) { |
| //logger.debug("receiver running in loop"); |
| byte[] msg = subscriber.recv(ZMQ.NOBLOCK); |
| // convert to HashMap and save the values for each key |
| // then expect c to be 1000, b=20, a=2 |
| // and do count++ (where count now would be 30) |
| if(msg == null || msg.length ==0) |
| { |
| continue; |
| } |
| String str = new String(msg); |
| |
| if (str.indexOf("{") == -1) { |
| continue; |
| } |
| int eq = str.indexOf('='); |
| String key = str.substring(1, eq); |
| int value = Integer.parseInt(str.substring(eq + 1, str.length() - 1)); |
| logger.debug("\nsubscriber recv:" + str); |
| dataMap.put(key, value); |
| count++; |
| logger.debug("out of loop.. "); |
| } |
| } |
| |
| public void teardown() |
| { |
| shutDown=true; |
| |
| syncclient.close(); |
| subscriber.close(); |
| context.term(); |
| } |
| } |