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IBM MQ Serverless Samples for AWS Lambda

These REST samples are written in Node.js and have been tested with a SAM AWS Lambda runtime of nodejs14.x.

The application consists of a single Lambda function exposed as an AWS Gateway API, defined in the template.yaml.

MQ Server Configuration

The application configuration for MQ server is in the template.yaml file in the Environment Variables section. Set HOSTNAME, QM_NAME etc in for your MQ server.

Testing locally

These samples can be tested offline locally using the AWS Serverless Application Model Command Line Interface. Follow the SAM install instructions to install SAM and its pre-requisites.

You will not need to sign in to AWS to build and test this application. You will need to log into AWS if you want to deploy the application to AWS. Remember to delete any deployments when you no longer need them.

Building the application

The application is built by running sam build from a command line in the directory that contains the template.yaml file. This will create a .aws-sam directory that contains the application dependencies and build artifacts in the correct format for subsequent testing, packaging and deployment.

Check the .aws-sam directory. It should contain a build/PutMessageFunction directory containing the application and dependencies.

Running the application locally

To start the application run sam local start-api from a command line in the directory that contains the template.yaml file.

You should see output similar to:

Mounting PutMessageFunction at http://127.0.0.1:3000/putmessage [GET]
You can now browse to the above endpoints to invoke your functions. You do not need to restart/reload SAM CLI while working on your functions, changes will be reflected instantly/automatically. You only need to restart SAM CLI if you update your AWS SAM template
2022-05-05 16:26:29  * Running on http://127.0.0.1:3000/ (Press CTRL+C to quit)

The application is exposed as a GET on http://127.0.0.1:3000/putmessage. You can specify the message to post to MQ as a query string eg. http://127.0.0.1:3000/putmessage?msg=Message+from+MQ+Lambda+function

Deploying the application

Before deploying the application, configure your AWS Lambda VPC to be able to connect to your MQ Server.

Deploy the application by running. sam deploy --guided

Undeploying the application

Delete the application from AWS when you no longer need it by running. sam delete

Verify that the application and related stack is removed by checking on the AWS console.