TCP connection error when connecting to client

taha yassine benbrahim

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Mar 27, 2017, 6:19:43 AM3/27/17

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Hi I am new in jpos, I have developed a ServerForward server: but I can't connect to the client, this is the implementation :

package client;

import java.io.IOException;

import org.jpos.iso.ISOException;

import org.jpos.iso.ISOMsg;

import org.jpos.iso.ISORequestListener;

import org.jpos.iso.ISOSource;

import org.jpos.iso.MUX;

import org.jpos.q2.Q2;

import org.jpos.util.NameRegistrar;

public class ServerListener implements ISORequestListener {

public static void main(String[] args) {

Q2 q2 = new Q2();

q2.start();

}

@Override

public boolean process(ISOSource isoSrc, ISOMsg isoMsg) {

try {

if (isoMsg.getMTI().equals("0800")) {

ISOMsg reply = (ISOMsg) isoMsg.clone();

reply.setResponseMTI();

reply.set(39, "00");

isoSrc.send(reply);

return true;

}

// send request to server B

MUX mux = (MUX) NameRegistrar.getIfExists("mux.jpos-client-mux");

ISOMsg reply = mux.request(isoMsg, 10 * 1000);

if (reply != null) {

System.out.println(new String(reply.pack()));

reply.set(125, "RESPONSE FROM SERVER A");

isoSrc.send(reply);

}

} catch (ISOException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return false;

}

------------------------------------10_server.xml--------------------------------

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<channel name="ClientChannel" class="org.jpos.iso.channel.HEXChannel" logger="Q2"

packager="org.jpos.iso.packager.GenericPackager">

</channel>

<request-listener class="client.ServerListener" logger="Q2">

</request-listener>

</server>

--------------------------------my packager -------------------------------------

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<!DOCTYPE isopackager SYSTEM "genericpackager.dtd">

<isofield

id="0"

length="4"

name="MESSAGE TYPE INDICATOR"

class="org.jpos.iso.IFA_NUMERIC"/>

<isofield

id="1"

length="64"

name="BIT MAP"

class="org.jpos.iso.IFA_BITMAP"/>

<isofield

id="3"

length="6"

name="PROCESSING CODE"

class="org.jpos.iso.IFA_NUMERIC"/>

<isofield

id="4"

length="12"

name="AMOUNT, TRANSACTION"

class="org.jpos.iso.IFA_NUMERIC"/>

<isofield

id="7"

length="10"

name="TRANSMISSION DATE AND TIME"

class="org.jpos.iso.IFA_NUMERIC"/>

<isofield

id="11"

length="6"

name="SYSTEM TRACE AUDIT NUMBER"

class="org.jpos.iso.IFA_NUMERIC"/>

<isofield

id="44"

length="25"

name="ADITIONAL RESPONSE DATA"

class="org.jpos.iso.IFA_LLCHAR"/>

<isofield

id="105"

length="999"

name="RESERVED ISO USE"

class="org.jpos.iso.IFA_LLLCHAR"/>

</isopackager>

-------------------------15_channel.xml-------------------------------------

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<channel-adaptor name='jpos-client-adaptor' class="org.jpos.q2.iso.ChannelAdaptor"

logger="Q2">

<channel class="org.jpos.iso.channel.HEXChannel" logger="Q2"

packager="org.jpos.iso.packager.GenericPackager">

</channel>

<in>jpos-client-send</in>

<out>jpos-client-receive</out>

<reconnect-delay>10000</reconnect-delay>

</channel-adaptor>

-----------------------------------20_mux.xml----------------------------------------------

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<in>jpos-client-receive</in>

<out>jpos-client-send</out>

</mux>

---------------------------------------------------------------------------------------------------

I just want to receive messages from client and forward it to server, and the same think from server to client

Thanks

Andrés Alcarraz

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Mar 27, 2017, 8:00:43 AM3/27/17

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Hi, I'm afraid you didn't provide all the information we might need to hepl you.

Fisto of all, we have no idea to who you are trying to connect, in the sense that we don't know if the channel/packager matches their scpecs, you need to provide access to the output of your implementation, maskarading every sensible information.

Are you sure the messages are arriving to your server?

How do you know they aren't getting to the server you are connecting to?

Are you absolutely sure your channel/packager configuration matches the other server specs? If so what did the other end told you so that you think the message does not arrives?

What do you mean you can't connect, are you sure the other end is up in you machine and listening on port 8000? Did you run netstat to verify that?

Please provide all the answers to the question asked if you want us to be able to help you without some superpower someone in the list could have to divine what could be going on.

Best regards and please don't forget to answer every question so we can have the needed information to help you.

Andrés Alcaraz

El 27/03/17 a las 07:19, taha yassine benbrahim escribió:

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chhil

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Mar 27, 2017, 8:17:26 AM3/27/17

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Server is listening on 8001 and client is connecting on 8000 may be your problem.

-chhil

To view this discussion on the web visit https://groups.google.com/d/msgid/jpos-users/b33cb111-ff27-9f87-b2c3-f21af65b4353%40gmail.com.

taha yassine benbrahim

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Mar 27, 2017, 8:43:01 AM3/27/17

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I am just testing my application, on my own computer, and I want to connect to the client via 127.0.0.1 and port 8000 and sending a message from a TCP client and received from my application then forward it to a TCP server, I am using Hercules for CLIENT TCP and SERVER TCP listening on port 8001, and for doing that I have done this solution

Andrés Alcarraz

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Mar 27, 2017, 8:47:16 AM3/27/17

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Hi, you still didn't provide any of the information requested, this information is simply not enaugh for us to help you.

Please responde to my questions in my other response, we have no idea what is going on on your machine, and I'm afraid your explanation is not complete enough.

You NEED to response those questions precisely if you want help from us, since otherwise we have not enagh to help you, please help us help you and ask a smart question

Regards

El 27/03/17 a las 09:43, taha yassine benbrahim escribió:

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taha yassine benbrahim

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Mar 27, 2017, 8:56:37 AM3/27/17

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Are you sure the messages are arriving to your server?

No, because I can't send a message from the client because I have this error. and I can't connect to the client

And the server is listening in the 8001 port when, netstat show that is listening
but I can't test if its working until I coonect to the client and send a message

Le lundi 27 mars 2017 11:19:43 UTC+1, taha yassine benbrahim a écrit :

Andrés Alcarraz

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Mar 27, 2017, 9:56:25 AM3/27/17

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El 27/03/17 a las 09:56, taha yassine benbrahim escribió:

Are you sure the messages are arriving to your server?
No, because I can't send a message from the client because I have this error. and I can't connect to the client

And the server is listening in the 8001 port when, netstat show that is listening

So if your server is listening and your client, which I understand is not jPOS, is not being able to connect, it's not a jpos issue but a issue of your client software. Again the problem is that it's not able to connecto? or that it sends messages that are not being received by the server once the connection has been established?

Your responses are so vague that it's difficult to me to understang what is going on. Please be more specific.

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taha yassine benbrahim

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Mar 27, 2017, 10:54:59 AM3/27/17

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My problem is that I am new in jpos, and I want to test my application, my application consist of having a Server A that Link between Server B and Client (requester) So I have to implement a client to send a message to server A, then forwarding the message to server B, then waiting to response from Server B and forward it to Client, the server A is listening On 8001 and forward the messages from client via port 8000 and host address 127.0.0.1 to server B, this is my final implementation:

My Generic Packager (basic.xml):

------------------------------------------------------------------------------------

00_logger.xml :

--------------------------------------------------------------------------------------

<log-listener class="org.jpos.util.SimpleLogListener" />

<log-listener class="org.jpos.util.BufferedLogListener">

</log-listener>

<log-listener class="org.jpos.util.DailyLogListener">

</log-listener>

</logger>

10_server_A.xml :

---------------------------------------------------------------------------------------------

<channel name="Server-A-Channel" class="org.jpos.iso.channel.HEXChannel" logger="Q2"

packager="org.jpos.iso.packager.GenericPackager">

</channel>

<request-listener class="serverFront.ServerListener" logger="Q2">

</request-listener>

</server>

11_server_B.xml :

---------------------------------------------------------------------------------------------------------

<channel name="Server-B-Channel" class="org.jpos.iso.channel.HEXChannel" logger="Q2"

packager="org.jpos.iso.packager.GenericPackager">

</channel>

<request-listener class="serverB.ServerBListener" logger="Q2">

</request-listener>

</server>

30_client_channel.xml:

-----------------------------------------------------------------------------------------------

<channel-adaptor name='client-adaptor' class="org.jpos.q2.iso.ChannelAdaptor"

logger="Q2">

<channel class="org.jpos.iso.channel.HEXChannel" packager="org.jpos.iso.packager.GenericPackager"

logger="Q2">

</channel>

<in>client-send</in>

<out>client-receive</out>

<reconnect-delay>10000</reconnect-delay>

</channel-adaptor>

32_server_A_forward_channel.xml :

-------------------------------------------------------------------------------------------------

<channel-adaptor name='server-A-adaptor' class="org.jpos.q2.iso.ChannelAdaptor" logger="Q2">

<channel class="org.jpos.iso.channel.HEXChannel"

packager="org.jpos.iso.packager.GenericPackager" logger="Q2">

</channel>

<in>serverA-forward-send</in>

<out>serverA-forward-receive</out>

<reconnect-delay>10000</reconnect-delay>

</channel-adaptor>

40_client_mux.xml :

--------------------------------------------------------------------------------------------------

<in>client-receive</in>

<out>client-send</out>

</mux>

41_server_A_forward_mux.xml:

---------------------------------------------------------------------------------------------------

<in>serverA-forward-receive</in>

<out>serverA-forward-send</out>

</mux>

99_sysmon.xml:

-------------------------------------------------------------------------------------------------

</sysmon>

The client for sending the message :

package requester;

import org.jpos.iso.ISOException;

import org.jpos.iso.ISOMsg;

import org.jpos.iso.ISOUtil;

import org.jpos.iso.MUX;

import org.jpos.q2.Q2;

import org.jpos.q2.iso.QMUX;

import org.jpos.util.NameRegistrar;

public class Client {

public static void startQ2() {

Q2 q2 = new Q2();

q2.start();

System.out.println("Starting Deployment");

}

public static void main(String[] args) {

startQ2();

// give some delay before sent req, cz q2 deployment is async

ISOUtil.sleep(5000);

// Process send and receive data

try {

MUX mux = (MUX) NameRegistrar.getIfExists("mux.client-mux");

ISOMsg msg=createReqMsg();

ISOMsg reply = mux.request(msg, 10 * 1000);

System.out.println(new String(reply.pack()));

} catch (ISOException e) {

e.printStackTrace();

}

public static ISOMsg createReqMsg() {

ISOMsg reqMsg = new ISOMsg();

reqMsg.setHeader("0066".getBytes());

try {

reqMsg.set(3, "201234");

reqMsg.set(4, "10000");

reqMsg.set(7, "110722180");

reqMsg.set(11, "123456");

reqMsg.set(44, "A5DFGR");

reqMsg.set(105, "ABCDEFGHIJ 1234567890");

} catch (ISOException e) {

e.printStackTrace();

}

return reqMsg;

}

server B :

package serverB;

import java.io.IOException;

import org.jpos.iso.ISOException;

import org.jpos.iso.ISOMsg;

import org.jpos.iso.ISORequestListener;

import org.jpos.iso.ISOSource;

public class ServerBListener implements ISORequestListener {

@Override

public boolean process(ISOSource requester, ISOMsg reqMsg) {

try {

ISOMsg respMsg = (ISOMsg) reqMsg.clone();

respMsg.set(124, "HI CLIENT, THIS IS DATA FROM ME! B");

respMsg.set(39, "00");

respMsg.setResponseMTI();

requester.send(respMsg);

} catch (ISOException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return false;

}

And Server A for forwarding:

package serverFront;

import java.io.IOException;

import org.jpos.iso.ISOException;

import org.jpos.iso.ISOMsg;

import org.jpos.iso.ISORequestListener;

import org.jpos.iso.ISOSource;

import org.jpos.iso.MUX;

import org.jpos.q2.Q2;

import org.jpos.util.NameRegistrar;

public class ServerAListener implements ISORequestListener {

public static void main(String[] args) {

Q2 q2 = new Q2();

q2.start();

}

@Override

public boolean process(ISOSource isoSrc, ISOMsg isoMsg) {

try {

if (isoMsg.getMTI().equals("0800")) {

ISOMsg reply = (ISOMsg) isoMsg.clone();

reply.setResponseMTI();

reply.set(39, "00");

isoSrc.send(reply);

return true;

}

// send request to server B

MUX mux = (MUX) NameRegistrar.getIfExists("mux.serverA-forwarder-mux");

ISOMsg reply = mux.request(isoMsg, 10 * 1000);

if (reply != null) {

System.out.println(new String(reply.pack()));

reply.set(125, "RESPONSE FROM SERVER A");

isoSrc.send(reply);

}

} catch (ISOException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return false;

}

notice that there is no specification, is just a message that i want to send from the client, and forward it via server A to B, then waiting a response from B then send it to the client, thats all,

taha yassine benbrahim

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Mar 27, 2017, 11:06:08 AM3/27/17

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And when I run the client, it always show me java.lang.NullPointerException for " ISOMsg reply = mux.request(msg, 10 * 1000);"

Le lundi 27 mars 2017 11:19:43 UTC+1, taha yassine benbrahim a écrit :

Andrés Alcarraz

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Mar 27, 2017, 12:58:28 PM3/27/17

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El 27/03/17 a las 12:06, taha yassine benbrahim escribió:

And when I run the client, it always show me java.lang.NullPointerException for " ISOMsg reply = mux.request(msg, 10 * 1000);"

That's because your mux is null. If that is the code in your request listener, then the server is already receiving messages. Or that's code in another client program?
If that's the case, then the problem is that your mux is null, and you sshould show us the client program so we can assist you.

Regars

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taha yassine benbrahim

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Mar 28, 2017, 7:20:58 AM3/28/17

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Hi, where I have to place my generic packager, because I have placed in deploy directory, and mention this uri :<property name="packager-config" value="/deploy/basic.xml" /> but I got this message Nested:java.io.FileNotFoundException: C:\WorkspaceMars\Pcard\JposProject\deploy\basic.xml

Le lundi 27 mars 2017 11:19:43 UTC+1, taha yassine benbrahim a écrit :

Andrés Alcarraz

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Mar 28, 2017, 2:20:39 PM3/28/17

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the url is relative to the directory from where you execute the program, don't know exactly your setup or how you are launching the program so cannot help you more

Andrés Alcarraz

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