org.sample.TimeController.java Source code

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Here is the source code for org.sample.TimeController.java

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/**
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.sample;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import javax.jms.*;
import java.math.BigInteger;
import java.security.SecureRandom;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

@Controller
public class TimeController {
    private final Logger log = LoggerFactory.getLogger(TimeController.class);
    @Autowired
    private ConnectionFactory jmsFactory;

    @RequestMapping(method = RequestMethod.GET, value = { "/tick" })
    public ModelAndView get() throws Exception {
        Connection connection = jmsFactory.createConnection();
        Session jmsSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        SecureRandom srandom = new SecureRandom();
        String rand = new BigInteger(176, srandom).toString(32);
        String q = Long.toString(System.currentTimeMillis()) + "-" + rand;
        Destination destination = jmsSession.createQueue(q);

        Timer timer = new Timer();
        long delay = 1 * 1000;
        timer.schedule(new TickTask(jmsSession, destination), 0, delay);

        ModelAndView mav = new ModelAndView("client");
        mav.addObject("queue", destination.toString());
        return mav;
    }

    private class TickTask extends TimerTask {

        private Destination destination;
        private Session session;
        private MessageProducer producer;

        TickTask(Session s, Destination d) throws JMSException {
            this.destination = d;
            this.session = s;
            this.producer = session.createProducer(destination);
            producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
        }

        @Override
        public void run() {

            Date date = new Date();
            SimpleDateFormat format = new SimpleDateFormat("dd.MM.yyyy hh:mm:ss");
            String current_time = format.format(date);
            log.info("Destination : " + destination.toString() + ", time : " + current_time);
            try {
                TextMessage message = session.createTextMessage(current_time);
                producer.send(message);
            } catch (JMSException e) {
                e.printStackTrace();
            }

        }
    }
}