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IBM MQ Go samples

The Go samples are based on https://github.com/ibm-messaging/mq-golang/tree/master/samples and have been tested with Golang version 1.13.6.

Install/unzip IBM MQ client

Mac

IBM MQ MacOS toolkit for developers download

Add /opt/mqm/bin and /opt/mqm/samp/bin, to the PATH by editing /etc/paths

export DYLD_LIBRARY_PATH=/opt/mqm/lib64

Windows

Windows client v 9.1.5.0 download

Linux

Linux Ubuntu client v 9.1.5.0 download

Use of $GOPATH

This repository now makes use of modules and so the compiler no longer needs to have a GOPATH environment variable set. Using modules also means that the mq-golang/ibmmq library is automatically downloaded when referenced by the go.mod file.

To run the samples

From the Go folder cd to the src folder.

Mac users - important - create symbolic link from MQ toolkit unzip location to /opt/mqm

The install script for the mq-golang library will look for what it needs in the lib64 folder of the Mac Toolkit; but it will look for this in the /opt/mqm/lib64 folder. We need to create a symbolic link:

sudo ln -s <unzip location>/IBM-MQ-Toolkit-Mac-x64-9.1.5.0 /opt/mqm

For other platforms, the MQ client libraries are assumed to have been installed in the default location.

You can then compile the samples.

Put / Get

Compile first

go build basicput.go

and run ./basicput

In a separate terminal, also cd to src folder.

Compile first

go build basicget.go

and run ./basicget

Publish / Subscribe

Open two terminals and in each cd to src folder.

In the first terminal; You have to run the subscriber sample first so it creates a subscription and waits for a publication.

Compile first

go build basicsub.go

and run ./basicsub

If you run the publisher before a subscription has been created on the topic, subscribers joining after the event will not receive the publication (there are persistent options but we've not set these samples for that)

In the second terminal, run the publisher sample.

Compile first

go build basicpub.go

and run ./basicpub

Request / Response

Open two terminals and in each cd to src folder.

In one of the terminals

Compile first

go build basicrequest.go

and run ./basicrequest

The request sample will put a message and wait for a response until it either gets a response or you ctrl+c interrupt it.

In the second terminal

Run the response sample

Compile first

go build basicresponse.go

and run ./basicresponse

The response sample will get a message from the queue, process it and put the response on the reply to queue and keep looking for more messages to respond to till you ctrl+c interrupt it.