inter-process-communication

Demonstrate a worker-server API that performs CRUD operations using Redis Publish-Subscribe model.

Running the API

Install all npm dependencies on your terminal by running

npm install

Both server and worker start with the single command

npm start

If you use nodemon instead, both the server and worker may not run concurrently.

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Calling the API

Use Postman to call the APIs

GET

http://localhost:3000/api/people/:id

This API will publish a message to request a person from the worker, and render JSON of the person (or of an error, should one occur).

SUCCESS

Code: 200

Message : { "id": 1, "first_name": "Raymond", "last_name": "Washington", "email": "rwashington0@vkontakte.ru", "gender": "Male", "ip_address": "214.64.240.51" }

FAILURE

Code: 404

Message: {error: "User Not Found"}

DELETE

http://localhost:3000/api/people/:id

This API will publish a message to request that the worker deletes a person, and render JSON stating that the operation completed (or an error should one occur).

SUCCESS

Code: 200

Message: {success : "User deleted!"}

FAILURE

Code: 404 Message: {error: "Deletion unsuccessful! Try again."}

POST

http://localhost:3000/api/people

This API will publish a message to request that the worker creates a person, and render JSON of the person created (or an error, should one occur).

NOTE

1. Pass all parameters id, first_name, last_name, email, gender, ip_address for successful update

2. Set Header: Content-Type application/json

3. Pass json data in the body by selecting raw format

SUCCESS

Code: 200

Message: { "id": 1001, "first_name": "Jon", "last_name": "Snow", "email": "jsnow@got.com", "gender": "Male", "ip_address": "1.1.1.1" }

FAILURE

Code: 400

Message: {"error": "Missing value" }, {"error": "Unable to add user."}

PUT

http://localhost:3000/api/people/:id

This API will publish a message to request that the worker updates a person, and render JSON of the person updated (or of an error, should once occur)

Header: Content-Type application/json Body: { "first_name" : "John", "last_name" : "Targaryen", "ip_address" : "10.10.10.10" }

Id is not mutable

SUCCESS

Code: 200

Message: { "id": 1001, "first_name": "John", "last_name": "Targaryen", "email": "jsnow@got.com", "gender": "Male", "ip_address": "10.10.10.10" }

FAILURE

Code:400

Message: {error : "Could not update record."}