A library that provides two queues: Delayed (Acheron) and Urgent (Styx). Jobs gets moved form Acheron to Styx by Charon (Ferryman).

Used for scheduled jobs, something that needs to run in the future. Has a built-in ticker that sets a job ready to be popped when schedule is met.

The design is to have two queues, one for each type. Producers can push on both and workers consume only on the urgent queue. For scheduled jobs to reach urgent queue, a Ferryman should be run that's responsible of popping from delayed queue and pushing to urgent queue.

Features:

• Push
• Pop
• Multi-pop
• Size
• Ticker

Used for jobs that needs to run immediately, supports acknowledging and requeuing jobs.

Features:

• Unack Queue
• Push
• Pop
• Multi-push
• Ack
• Requeue

Both queue supports 2 hours age of per second stats of the following:

• Push (Requeue)
• Pop
• Ack
• Size

You can register a handler on the queues to react on certain events like popping, pushing, acking, etc. like:

q := NewQueue("acheron", "delayed")
q.Register("push", func(j Job) {
    // do something
})
q.Register("pop", func(j Job) {
    // do something
})

Each event will have a set of arguments to be pass on the handler, still unstable and need to be documented. You can use these hooks to register Scylla, a stats logger.

Requires the following environment variables:

• RIVERS_REDIS_HOST
• RIVERS_REDIS_PORT
• RIVERS_REDIS_DB
• RIVERS_REDIS_PASSWORD

Tests can be run with Docker using Fig:

$ fig run --rm test

• Not used in any real project yet
• Coverage is at 82.7%

• Offer way to easily access stats
• Decouple stats logger from the queues via hooks

http://marconi.mit-license.org