JPOS多路复用器上并行的多个ISO8583请求

Question

I have a working JPOS ISO8583 server that able to handle request asynchronously, then i need to develop a test client to stress test it.

I want to know, is a mux able to handle multiple request at once and process it parallely? See this diagram. I'm using ISOMUX (not QMUX).

if the answer is Yes, then how to do it?

I tried with this code:

Customizer.java

import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import org.jpos.iso.ISODate;
import org.jpos.iso.ISOException;
import org.jpos.iso.ISOMUX;
import org.jpos.iso.ISOMsg;
import org.jpos.iso.channel.ASCIIChannel;
import org.jpos.iso.packager.ISO87APackager;

public class Customizer {

    private ISO87APackager packager;
    private ASCIIChannel channel;
    private ISOMUX mux;

    public Customizer() {
        try {
            this.packager = new ISO87APackager();
            this.channel = new ASCIIChannel(packager);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    static String C_HOST = "127.0.0.1";
    static int C_PORT = 2000;
    static int C_TIMEOUT = 60000;
    public int stan= 0;

    public void connect() throws Exception{
        this.channel.setHost(C_HOST);
        this.channel.setPort(C_PORT);
        this.channel.setTimeout(C_TIMEOUT);
        this.channel.connect();

        this.mux = new ISOMUX(channel);
        Thread muxThread = new Thread(mux);
        muxThread.start();

        System.out.println("Connected with " + channel.getHost() + ":" + channel.getPort() + " ? " + mux.isConnected());
        System.out.println(channel.getSocket());
    }

    private void completeMsg(ISOMsg msg) {
        if (msg == null) {
            return;
        }
        Date now = new Date();
        try {
            msg.set(7, ISODate.getDateTime(now));
            msg.set(11, String.format("%06d", stan++));
            msg.set(12, ISODate.getTime(now));
            msg.set(13, ISODate.getDate(now));
            msg.set(15, ISODate.getDate(now));
        } catch (ISOException e) {
        }
    }

    public void signIn() throws ISOException {
        ISOMsg reqMsg = new ISOMsg();
        reqMsg.setPackager(packager);
        reqMsg.setDirection(ISOMsg.OUTGOING);
        reqMsg.setMTI("0800");
        reqMsg.set(70, "001");

        completeMsg(reqMsg);

        if (mux.isConnected()) {
            try {
                ISOMsg respMsg;
                respMsg = mux.request(reqMsg, C_TIMEOUT);
                System.out.println("Success");
            } catch (ISOException e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("Error sending: not connected to server");
        }
    }

    static int NUM_THREADS = 3;
    public static void main(String[] args) {
        Customizer tr = new Customizer();

        try {
            System.out.println("--STRESS TEST--");
            System.out.println(">> CONNECTION");
            tr.connect();

            System.out.println(">> SIGN ON");
            tr.signIn();

            ExecutorService executor = Executors.newFixedThreadPool(NUM_THREADS);
            List<Callable<String>> calList = new ArrayList<Callable<String>>();

            long start = System.currentTimeMillis();

            System.out.println(">> REQUEST WITH "+NUM_THREADS+" THREADS");
            for (int i=0; i<NUM_THREADS; i++) {
                // the XML_TEST is a xml string, the xml later converted to ISOMsg 
                Callable<String> callable = new RequestSender(tr.packager, tr.mux, ConstantData.XML_TEST, i);
                calList.add(callable);
            }

            List<Future<String>> futList = executor.invokeAll(calList);

            System.out.println(">> FINISHED");
            System.out.println("elapsed ms: " + (System.currentTimeMillis() - start));
            for (Future<String> fut : futList) {
                try {
                    System.out.println(new Date()+ " | msgId: "+fut.get());
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            executor.shutdown();    
            System.exit(1);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

RequestSender.java

import org.jpos.iso.ISODate;
import org.jpos.iso.ISOException;
import org.jpos.iso.ISOMUX;
import org.jpos.iso.ISOMsg;
import org.jpos.iso.packager.ISO87APackager;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.Callable;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

public class RequestSender implements Callable<String> {

    static int C_TIMEOUT = 25000; //changed
    private ISO87APackager packager;
    private ISOMUX mux;
    private String xmlReq;
    private int loop;
    private int stan = 1;

    public RequestSender(ISO87APackager packager, ISOMUX mux, String xmlReq, int loop) {
        super();
        this.packager = packager;
        this.mux = mux;
        this.xmlReq = xmlReq;
        this.loop = loop;
    }

    private ISOMsg isoBuilder(String xml){
        ISOMsg msg = new ISOMsg();
        try {
            DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder;
            dBuilder = dbFactory.newDocumentBuilder();
            Document doc = dBuilder.parse(new ByteArrayInputStream(xml.getBytes()));
            doc.getDocumentElement().normalize();
            NodeList nList = doc.getElementsByTagName("field");
            for (int temp = 0; temp < nList.getLength(); temp++) {
                Node nNode = nList.item(temp);
                if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element eElement = (Element) nNode;
                    msg.set(eElement.getAttribute("id"), eElement.getAttribute("value"));
                }
            }
            msg.set("37", "0000000009"+loop);
            completeMsg(msg);
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ISOException e) {
            e.printStackTrace();
        }
        return msg;
    }

    private void completeMsg(ISOMsg msg) {
        if (msg == null) {
            return;
        }
        Date now = new Date();
        try {
            msg.set(7, ISODate.getDateTime(now));
            msg.set(11, String.format("%06d", loop));  //changed 
            msg.set(12, ISODate.getTime(now));
            msg.set(13, ISODate.getDate(now));
            msg.set(15, ISODate.getDate(now));
        } catch (ISOException e) {
        }
    }

    private synchronized String testConfirmPayment() throws IOException {
        if (mux.isConnected()) {
            ISOMsg reqMsg = isoBuilder(xmlReq);
        System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").format(new Date())+" | REQ"+loop+"= "+reqMsg.toString().trim()+" BIT 37 : "+reqMsg.getString("37"));
            try {
                ISOMsg respMsg = mux.request(reqMsg, C_TIMEOUT);
                if (respMsg != null){
                    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").format(new Date())+" | RES"+loop+"= "+respMsg.getString(48));
                    return respMsg.getString(48);
                } else {
                    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").format(new Date())+" | RES"+loop+"=  NO RESPONSE");
                    return "NO RESPONSE ";
                }
            } catch (ISOException e) {
                e.printStackTrace();
            }
        }
        return "NOT CONNECTED";
    }

    public String call() throws Exception {
        return testConfirmPayment();
    }

}

This request is successfully replied by server, but only on last request.

Running Output

--STRESS TEST--
>> CONNECTION
Connected with 127.0.0.1:2000 ? true
Socket[addr=/127.0.0.1,port=2000,localport=51086]
>> SIGN ON
Success
>> REQUEST WITH 3 THREADS
2018-01-23 09:12:06.355 | REQ0= 0200 000001 00000003 BIT 37 : 00000000090
2018-01-23 09:12:06.355 | REQ1= 0200 000001 00000003 BIT 37 : 00000000091
2018-01-23 09:12:06.355 | REQ2= 0200 000001 00000003 BIT 37 : 00000000092
2018-01-23 09:12:06.453 | RES2= 10004100108XXXXX  JOHNSON SIMONE XXX                  
2018-01-23 09:12:11.450 | RES1= NO RESPONSE
2018-01-23 09:12:26.357 | RES0= NO RESPONSE
>> FINISHED
elapsed ms: 20045

So how to solve this? if i tracked down i see the server is responding but unable to get in to the MUX especially on

ISOMsg respMsg = mux.request(reqMsg, C_TIMEOUT);

Any reply and suggestion is apppreciated.

Thankyou in advance

Update

The problem has been solved, The code above is fully working now..

Answer 1

Make sure you increment the STAN (serial trace audit number, data element 11). That's the reason you're not getting responses, your client is sending duplicate messages.