Popularity
5.1
Stable
Activity
0.0
Stable
22
11
11

Monthly Downloads: 18
Programming language: Elixir
License: MIT License
Tags: Queue    

RBMQ alternatives and similar packages

Based on the "Queue" category.
Alternatively, view RBMQ alternatives based on common mentions on social networks and blogs.

Do you think we are missing an alternative of RBMQ or a related project?

Add another 'Queue' Package

README

RBMQ

Simple and easy creation of producers and consumers for RabbitMQ. Written over AMQP

Installation

The package can be installed as:

  1. Add rbmq to your list of dependencies in mix.exs:
  def deps do
    [{:rbmq, "~> 0.2.2"}]
  end
  1. Ensure rbmq is started before your application:
  def application do
    [applications: [:rbmq]]
  end

Configuration

You can define connection configuration in your config.exs:

  config :my_app, MyAMQPConnection,
    host: {:system, "AMQP_HOST", "localhost"},
    port: {:system, "AMQP_PORT", 5672},
    username: {:system, "AMQP_USER", "guest"},
    password: {:system, "AMQP_PASSWORD", "guest"},
    virtual_host: {:system, "AMQP_VHOST", "/"},
    connection_timeout: {:system, "AMQP_TIMEOUT", 15_000},

RBMQ support linking to runtime environment conflagration via {:system, "ENV_VAR_NAME", "default_value"} and {:system, "ENV_VAR_NAME"} tuples. But are free to set raw values whenever you need.

By default RBMQ read environment configuration to establish AMQP connection:

  • AMQP_HOST - host, default: localhost
  • AMQP_PORT - port, default: 5672
  • AMQP_USER - username, default: guest
  • AMQP_PASSWORD - password, default: guest
  • AMQP_VHOST - default vhost, default: /
  • AMQP_TIMEOUT - timeout, default: 15 sec.

Other connections settings can be found in AMQP client docs.

Usage

  1. Define your connection
  defmodule MyAMQPConnection do
    use RBMQ.Connection,
      otp_app: :my_app
      # Optionally you can define queue params right here,
      # but it's better to do so in producer and consumer separately
  end
  1. Define your Producer and/or Consumer
  defmodule MyProducer do
    use RBMQ.Producer,
      connection: MyAMQPConnection,

      # Queue params
      queue: [
        name: "prodcer_queue",
        error_name: "prodcer_queue_errors",
        routing_key: "prodcer_queue",
        durable: false
      ],
      exchange: [
        name: "prodcer_queue_exchange",
        type: :direct,
        durable: false
      ]
  end

  defmodule MyConsumer do
    use RBMQ.Consumer,
      connection: MyAMQPConnection,

      # Queue params
      queue: [
        name: "consomer_queue",
        durable: false
      ],
      qos: [
        prefetch_count: 10
      ]

    def consume(_payload, [tag: tag, redelivered?: _redelivered]) do
      ack(tag)
    end
  end

Pay attention to consume/2 method. Write your consuming logic there. We recommend to send async messages to GenServer that will consume them, so queue read wouldn't be blocked by a single thread.

If your queue required acknowledgements, use ack\1 and nack\1 methods.

  1. Add everything to your application supervisor:
  defmodule MyApp do
    use Application

    # See http://elixir-lang.org/docs/stable/elixir/Application.html
    # for more information on OTP Applications
    def start(_type, _args) do
      import Supervisor.Spec, warn: false

      # Define workers and child supervisors to be supervised
      children = [
        # Start the AMQP connection
        supervisor(MyAMQPConnection, []),
        # Start producer and consumer
        worker(MyProducer, []),
        worker(MyConsumer, []),
      ]

      opts = [strategy: :one_for_one, name: AssetProcessor.API.Supervisor]
      Supervisor.start_link(children, opts)
    end
  end