jpos : is it possible to have different header for incoming and outgoing message in the same channel - jpos

Question

jpos : how to handle messages with different headers with different length for incoming request and response
I have a below custom channel - the intentions is to handle different header of different length
package org.jpos.iso.channel;
import org.jpos.iso.ISOException;
import org.jpos.iso.ISOMsg;
import org.jpos.iso.ISOPackager;
import org.jpos.iso.packager.GenericPackager;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Arrays;
public class GWMipChannel extends NACChannel {
byte[] madaHeader = {(byte) 0x00, (byte) 0x18, (byte) 0xd6, (byte) 0xf3, (byte) 0xf6, (byte) 0xf8, (byte) 0xf7};
byte[] nitmxHeader = {(byte) 0x00, (byte) 0x18, (byte) 0xd6, (byte) 0xf3, (byte) 0xf7, (byte) 0xf3, (byte) 0xf2};
byte[] response_mada_header = {(byte) 0x00, (byte) 0x18, (byte) 0xc9, (byte) 0xf3, (byte) 0xf6, (byte) 0xf8, (byte) 0xf7};
protected byte[] readHeader(int hLen) throws IOException {
byte[] header = new byte[25];
serverIn.readFully(header, 0, 25);
boolean mada_header = ByteBuffer.wrap(header, 0, 7).equals(ByteBuffer.wrap(madaHeader));
boolean nitmx_header = ByteBuffer.wrap(header, 0, 7).equals(ByteBuffer.wrap(nitmxHeader));
boolean rsp_mada_header = ByteBuffer.wrap(header, 0, 7).equals(ByteBuffer.wrap(response_mada_header, 0, 7));
if (mada_header) {
return header;
} else if (nitmx_header) {
header = Arrays.copyOf(header, 47);
serverIn.readFully(header, 25, 22);
return header;
} else if (rsp_mada_header) {
//serverIn.readFully(header, 0, 50);
header = Arrays.copyOf(header, 50);
serverIn.readFully(header, 0, 50);
return header;
}
return header;
}
protected void sendMessageHeader(ISOMsg m, int len) throws IOException {
byte[] header = m.getHeader();
//assume header is the one to send, and already has 22 or 44 length
//or you can check
serverOut.write(header);
}
}
in the q2 log I can see the messages are parsed correctly as per to the headers
<log realm="org.jpos.transaction.TransactionManager" at="2020-04-16T18:37:55.662" lifespan="555ms">
<commit>
gwmip-1:idle:1
<context>
TIMESTAMP: Thu Apr 16 18:37:55 AEST 2020
SOURCE: org.jpos.iso.channel.X9AChannel#102579c0
REQUEST:
<isomsg direction="outgoing">
<!-- org.jpos.iso.packager.GenericPackager[cfg/packager/iso87ascii-backup.xml] -->
<header>0018D6F3F6F8F7000000000000000000000000000000000002</header>
<field id="0" value="0200"/>
<field id="2" value="5000100100700010"/>
<field id="3" value="000000"/>
<field id="4" value="002167959991"/>
<field id="7" value="0416083755"/>
<field id="11" value="199682"/>
<field id="12" value="183753"/>
<field id="13" value="0416"/>
<field id="14" value="1612"/>
<field id="18" value="4900"/>
<field id="22" value="812"/>
<field id="32" value="588850"/>
<field id="33" value="004601"/>
<field id="37" value="123451234512"/>
<field id="41" value="UTIS2I25"/>
<field id="42" value="EUREKAAIR "/>
<field id="43" value="01007/S2M_txn_base.mat rix_/ Parel M XYZ"/>
<field id="48" value="54363130353030303031393230333132333432303730313033323132343332386A48796E2B3759466931455541524541414141764E5565364876383D" type="binary"/>
<field id="49" value="356"/>
<field id="61" value="10251000066003560000000000"/>
<field id="63" value="MC2J2G6P8"/>
</isomsg>
DESTINATION: gwmip-AUTORESPONDER
RESULT:
<result/>
:paused_transaction:
id: 1
RESPONSE:
<isomsg direction="outgoing">
<!-- org.jpos.iso.packager.GenericPackager[cfg/packager/CISebcdic_mada.xml] -->
<header>0018C9F3F6F8F700000000000000000000000000000000000000000000000000000000000000000000000000000000000002</header>
<field id="0" value="0210"/>
<field id="2" value="165000100100700010"/>
<field id="3" value="000000"/>
<field id="4" value="002167959991"/>
<field id="7" value="0416083755"/>
<field id="11" value="199682"/>
<field id="15" value="0416"/>
<field id="32" value="06588850"/>
<field id="33" value="06004601"/>
<field id="37" value="123451234512"/>
<field id="38" value="183755"/>
<field id="39" value="00"/>
<field id="41" value="UTIS2I25"/>
<field id="48" value="060T6105000019203123420701032124328jHyn+7YFi1EUAREAAAAvNUe6Hv8="/>
<field id="49" value="356"/>
<field id="63" value="009MC2J2G6P8"/>
</isomsg>
my server
<server class="org.jpos.q2.iso.QServer" logger="Q2" name="gwmip-server-5281" realm="gwmip-server-5281">
<attr name="port" type="java.lang.Integer">5281</attr>
<channel class="org.jpos.iso.channel.GWMipChannel"
packager="org.jpos.iso.packager.GenericPackager"
type="server"
logger="Q2"
header="6000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"
>
<property name="packager-config" value="cfg/packager/CISebcdic_mada.xml" debug="True" />
<property name="timeout" value="180000"/>
</channel>
<request-listener class="org.jpos.iso.IncomingListener" logger="Q2" realm="incoming-request-listener">
<property name="queue" value="GWMIPTXNMGR" />
<property name="ctx.DESTINATION" value="gwmip-AUTORESPONDER" />
</request-listener>
</server>
my issuer channel is
<?xml version="1.0" ?>
<channel-adaptor name='gwmip-channel' class="org.jpos.q2.iso.ChannelAdaptor" logger="Q2">
<channel class="org.jpos.iso.channel.X9AChannel"
packager="org.jpos.iso.packager.GenericPackager"
logger="Q2"
header="6000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"
>
<property name="packager-config" value="cfg/packager/iso87ascii-backup.xml" debug="True" />
<property name="host" value="127.0.0.1" />
<property name="port" value="9001" />
</channel>
<in>gwmip-send</in>
<out>gwmip-receive</out>
<reconnect-delay>10000</reconnect-delay>
</channel-adaptor>
The issue here is in the response 0210 message jpos sends only the second half 25 bytes as header not the 50 bytes as it received from the issuer.the first 25 bytes of header is not send.