Awesome

vbb-graph-computation-server

A web service to queue VBB transit map computations. An HTTP frontend to a persistent queue of computations, each producing an export file and a log.

ISC-licensed

Installing

git clone https://github.com/derhuerst/vbb-graph-computation-server
cd vbb-graph-computation-server
npm install --production

Usage

Push a job containing data to the queue:

curl -X POST 'http://localhost:3000/' -H 'Content-Type: application/json' --data '{"some": "data"}'
# {"error": false, "jobId": 1534625442860343, "msg": "job 1534625442860343 created."}

The worker in worker.js will, once it iterates over the 1534625442860343 job, create two files:

export – the worker's stdout – is the computed data.
log – the worker's stderr – contains log messages.

You can query the status of a job like this:

curl -X GET 'http://localhost:3000/1534625635081071'
# {"error": false, "jobId": "1534625635081071", "msg": "job 1534625635081071 is running.", "payload": "{\"foo\":\"bar\"}"}

Once the job is done, you can query the export file and log:

curl -X GET 'http://localhost:3000/1534625635081071/export'
curl -X GET 'http://localhost:3000/1534625635081071/log'

running the service

env PASSWORD=passwordToQueueTasks node index.js

You may want to monitor the web service using forever.

Contributing

If you have a question or have difficulties using vbb-graph-computation-server, please double-check your code and setup first. If you think you have found a bug or want to propose a feature, refer to the issues page.