contrib/src/test/java/com/datatorrent/contrib/zmq/ZeroMQMessageGenerator.java

/*
 * Copyright (c) 2015 DataTorrent, Inc. ALL Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.datatorrent.contrib.zmq;

import java.util.ArrayList;
import java.util.HashMap;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.zeromq.ZMQ;

import com.datatorrent.contrib.helper.MessageQueueTestHelper;

class ZeroMQMessageGenerator {

  private static final Logger logger = LoggerFactory.getLogger(ZeroMQMessageGenerator.class);

  private ZMQ.Context context;
  private ZMQ.Socket publisher;
  private ZMQ.Socket syncservice;
  private final int SUBSCRIBERS_EXPECTED = 1;

  String pubAddr = "tcp://*:5556";
  String syncAddr = "tcp://*:5557";

  public void setup()
  {
    context = ZMQ.context(1);
    logger.debug("Publishing on ZeroMQ");
    publisher = context.socket(ZMQ.PUB);
    publisher.bind(pubAddr);
    syncservice = context.socket(ZMQ.REP);
    syncservice.bind(syncAddr);
  }

  public void send(Object message)
  {
    String msg = message.toString();   
    publisher.send(msg.getBytes(), 0);
  }

  public void teardown()
  {
    publisher.close();
    context.term();
  }

  public void generateMessages(int msgCount) throws InterruptedException
  {
    for (int subscribers = 0; subscribers < SUBSCRIBERS_EXPECTED; subscribers++) {
      byte[] value = syncservice.recv(0);
      syncservice.send("".getBytes(), 0);
    }
    for (int i = 0; i < msgCount; i++) {

      ArrayList<HashMap<String, Integer>>  dataMaps = MessageQueueTestHelper.getMessages();
      for(int j =0; j < dataMaps.size(); j++)
      {
        send(dataMaps.get(j));  
      }     
    }
  }
}