queued

Simple HTTP-based queue server

Getting Started

Install:

Ensure Go and LevelDB are installed and then run:

$ make
$ sudo make install

Run:

$ queued [options]

API

Enqueue:

$ curl -X POST http://localhost:5353/:queue -d 'foo'

Append the POSTed data to the end of the specified queue (note that queues are created on-the-fly). The Location header will point to the enqueued item and is of the form http://localhost:5353/:queue/:id.

Dequeue:

$ curl -X POST http://localhost:5353/:queue/dequeue

Dequeue the item currently on the head of the queue. Guaranteed not to return the same item twice unless a completion timeout is specified (see below). The Location header will point to the dequeued item and is of the form http://localhost:5353/:queue/:id. Queued message data is returned in the response body.

Dequeue optionally takes wait and/or timeout query string parameters:

• wait=<sec> - block for the specified number of seconds or until there is an item to be read off the head of the queue

• timeout=<sec> - if the item is not completed (see endpoint below) within the specified number of seconds, the item will automatically be re-enqueued (when no timeout is specified the item is automatically completed when dequeued)

Get:

$ curl -X GET http://localhost:5353/:queue/:id

Get a specific item. The header X-Dequeued will be true if the item is currently dequeued and waiting for completion.

Complete:

$ curl -X DELETE http://localhost:5353/:queue/:id

Complete the specified item and destroy it (note that only items dequeued with a timeout can be completed).

Stats:

$ curl -X GET http://localhost:5353/:queue

Get stats about a given queue.

CLI Options

• -auth="" - HTTP basic auth password required for all requests
• -db-path="./queued.db" - the directory in which queue items will be persisted (n/a for memory store)
• -port=5353 - port on which to listen
• -store=leveldb - the backend in which items will be stored (leveldb or memory)
• -sync=true - boolean indicating whether data should be synced to disk after every write (n/a for memory store, see LevelDB's WriteOptions::sync)
• -v - output the version number

Client Libraries

• Node.js
• Python
• Ruby