Send JMS message to IBM-MQ with MQIIH header

Question

Can someone help me to send a JMS message to IBM-MQ with IIH (MQIIH) headers?

I am using the Spring Boot application with mq-jms-spring-boot-starter version 2.4.5 .

When I send a message it always goes with the RFH2 header although it sets StrucId as IIH in the message header.

public void send(Request mqRequest) throws JMSException {
    log.info("sending with message [{}] to queue [{}].", mqRequest.getMessage(), QUEUE_NAME);
    MQQueue destinationQueue = new MQQueue(QUEUE_NAME);
    jmsTemplate.convertAndSend(destinationQueue, mqRequest.getMessage(), message -> {
        log.info("setting standard JMS headers before sending");
       message.setJMSCorrelationID(UUID.randomUUID().toString());
        message.setJMSDestination(new MQQueue(QUEUE_NAME));
        message.setJMSTimestamp(System.nanoTime());
        message.setJMSType("MQIIH");
        message.setStringProperty("Authenticator", "********");
        message.setStringProperty("Format", "********");
        message.setStringProperty("ReplyToFormat", "********");
        message.setIntProperty("CommitMode", '0');
        message.setStringProperty("LTermOverride", "********");
        message.setStringProperty("MFSMapName", "********");
        message.setIntProperty("SecurityScope", 'C');
        message.setStringProperty("StrucId", "IIH ");
        message.setIntProperty("StrucLength", 84);
        message.setIntProperty("Version", 1);
        return message;
    });
}

Answer 1

You can not do this with pure JMS, you have to use the MQIIH helper class:

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import javax.jms.BytesMessage;
import com.ibm.mq.headers.MQIIH;
import com.ibm.msg.client.jms.JmsConstants;
...

public void send(Request mqRequest) throws JMSException {
    log.info("sending with message [{}] to queue [{}].", mqRequest.getMessage(), QUEUE_NAME);
    MQIIH mqiih = new MQIIH();
    mqiih.setAuthenticator("***");
    // set other MQIIH header values
    ByteArrayOutputStream mqiihBytes = new ByteArrayOutputStream();
    mqiih.write(new DataOutputStream(mqiihBytes));
    String destinationQueue = "queue:///" + QUEUE_NAME + "?targetClient=1";
    jmsTemplate.send(destinationQueue, (MessageCreator) session -> {
        BytesMessage message = session.createBytesMessage();
        message.setStringProperty(JmsConstants.JMS_IBM_FORMAT, "MQIMS");
        message.writeBytes(mqiihBytes.toByteArray());
        message.writeBytes("This Is The Body".getBytes());
        return message;

    });
}

With the queue option targetClient=1 the usual RFH2 header with JMS meta information gets stripped. The message will look like this:

5724-H72 (C) Copyright IBM Corp. 1994, 2022.
IBM MQ Queue Load/Unload Utility
* DMPMQMSG Version:9.3.1.0 Created:Wed Jan 11 08:41:37 2023
* Qmgr  = QM1
* Queue = Q1

A VER 2
A RPT 0
A MST 8
A EXP -1
A FDB 0
A ENC 273
A CCS 819
A FMT MQIMS   
A PRI 4
A PER 1
A MSI 414D5120514D312020202020202020204337BB6301ED0140
A COI 000000000000000000000000000000000000000000000000
A BOC 0
A RTQ                                                 
A RTM QM1                                             
A USR mqm         
A ACC 0000000000000000000000000000000000000000000000000000000000000000
A AIX 2020202020202020202020202020202020202020202020202020202020202020
A PAT 28
A PAN runner.RemoteTestRunner     
A PTD 20230111
A PTT 08413426
A AOX 20202020
A GRP 000000000000000000000000000000000000000000000000
A MSQ 1
A OFF 0
A MSF 0
A ORL -1
T IIH 
X 00000001000000
T T
X 0000011100000000
T         
X 00000000
T                         ***     
X 00000000000000000000000000000000
T     This Is The Body

Read    - Files:   0  Messages:1  Bytes:100
Written - Files:   0  Messages:1  Bytes:100