Get A Job

An Python implementation of "Get A Job" service from Designing Hypermedia APIs by Steve Klabnik.

The application uses Flask and Flask-RESTful for the API, Flask-SQLAlchemy and SQLite for persistence, and Celery and Redis for background processing.

Development

Install the package into a virtual environment:

$ virtualenv env
$ source env/bin/activate
$ pip install -r requirements.txt

Running tests:

$ python setup.py test

Create the database:

$ python manage.py create_db

Start the server:

$ python manage.py runserver
* Running on http://127.0.0.1:5000/
* Restarting with reloader

Start the background worker:

$ service redis-server start
$ python manager.py worker

Examples

Introspect interface:

$ curl --include http://127.0.0.1:5000/
HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 111
Server: Werkzeug/0.9.4 Python/2.7.5
Date: Sat, 09 Nov 2013 22:43:48 GMT

{
    "job": {
        "links": [
            {
                "href": "/jobs",
                "rel": "index"
            }
        ],
        "number_one": null,
        "number_two": null,
        "status": null
    }
}

Create a job:

$ curl --include \
       --data 'job[status]=in_progress' \
       --data 'job[number_one]=5' \
       --data 'job[number_two]=3' \
       http://127.0.0.1:5000/jobs
HTTP/1.0 302 FOUND
Content-Type: text/html; charset=utf-8
Content-Length: 0
Location: http://127.0.0.1:5000/jobs/1
Server: Werkzeug/0.9.4 Python/2.7.5
Date: Sat, 09 Nov 2013 22:37:27 GMT

Get the state of a job:

$ curl --include http://127.0.0.1:5000/jobs/1
HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 150
Server: Werkzeug/0.9.4 Python/2.7.5
Date: Sat, 09 Nov 2013 22:38:45 GMT

{
    "job": {
        "links": [
            {
                "href": "/jobs",
                "rel": "index"
            },
            {
                "href": "/jobs/1",
                "rel": "self"
            }
        ],
        "number_one": 5,
        "number_two": 3,
        "status": "in_progress"
    }
}

And once the background worker has processed the job:

$ curl --include http://127.0.0.1:5000/jobs/1
HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 160
Server: Werkzeug/0.9.4 Python/2.7.5
Date: Sat, 09 Nov 2013 22:42:01 GMT

{
    "job": {
        "answer": 8,
        "links": [
            {
                "href": "/jobs",
                "rel": "index"
            },
            {
                "href": "/jobs/1",
                "rel": "self"
            }
        ],
        "number_one": 5,
        "number_two": 3,
        "status": "finished"
    }
}