/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  http://www.espertech.com                                                           *
 *  ---------------------------------------------------------------------------------- *
 *  The software in this package is published under the terms of the GPL license       *
 *  a copy of which has been included with this distribution in the license.txt file.  *
 ***************************************************************************************
 */
package com.espertech.esper.example.terminal.sender;

import com.espertech.esper.example.terminal.common.BaseTerminalEvent;

import javax.jms.JMSException;
import javax.naming.NamingException;
import java.util.List;

public class TerminalEventSender {
    private static volatile boolean isShutdownRequested;
    private final InboundQueueSender sender;
    private final EventGenerator eventGenerator;

    public TerminalEventSender(String providerURL) throws JMSException, NamingException {
        sender = new InboundQueueSender(providerURL);
        eventGenerator = new EventGenerator();
    }

    public void destroy() throws JMSException {
        sender.destroy();
    }

    public void sendEvents() throws JMSException, NamingException, InterruptedException {
        List<BaseTerminalEvent> eventsToSend = eventGenerator.generateBatch();

        for (BaseTerminalEvent theEvent : eventsToSend) {
            sender.sendEvent(theEvent);
        }

        // Throttle the sender to roughly send a batch every 1 second
        System.out.println("Sleeping 1 second");
        Thread.sleep(1000);
    }

    public static void main(String[] args)
            throws Exception {
        String providerURL = "remote://localhost:4447";
        if (args.length > 0) {
            providerURL = args[0];
        }

        System.out.println("TerminalServiceReceiver attaching to provider url " +
                providerURL + " and queue " + InboundQueueSender.SEND_QUEUE + "...");

        TerminalEventSender client = new TerminalEventSender(providerURL);

        Runtime.getRuntime().addShutdownHook(new ShutdownThread());
        while (!isShutdownRequested) {
            client.sendEvents();
        }

        client.destroy();
        System.exit(0);
        System.out.println("TerminalEventSender ended");
    }

    /**
     * Inner class for registration as a shutdown hook. Implements Thread and
     * coordinates with Main thread via _lock.
     */
    static class ShutdownThread extends Thread {

        /**
         * Called by the JVM on initiation of a process shutdown. Registration
         * occurs in main thread.
         */
        public void run() {
            System.out.println("Shutting down TerminalEventSender");
            isShutdownRequested = true;
        }
    }
}