Diffusion Cloud "Hello World"

The briefest of projects, illustrating production and consumption of test data to and from a Diffusion Cloud instance.

Requirements

• A Diffusion Cloud service, version 6.5.0 or greater.
  • Configure your Diffusion Cloud service to allow anonymous sessions.
• node.js v12.
• npm v6.
• A Web browser supported by Diffusion.

Installation

npm install

Set lines 18 of public/index.html to the hostname of your Diffusion Cloud service, which you can find in your service dashboard.

Execution

Step 1

To create string topic my/topic with value hello world!:

npm run pub -- $HOST $USER $PASSWORD my/topic 'hello world!'

Where

• $HOST is the hostname of your Diffusion Cloud service, which you can find in your service dashboard.
• $USER will be admin, unless you create another principal holding the TOPIC_CONTROL role.
• $PASSWORD is the credentials for $USER

Step 2

To run a minimal web server, and open a web browser that subscribes to the same Diffusion Cloud Service and subscribes to topic my/topic.

npm run sub

Re-run step 1 to change the value of my/topic and observe the web-page update.