mendrugory / pubsubex

An example of a Publisher-Subscription system in Elixir

PubSubEx

This project is a PoC which tries to demonstrate how easy is to create a distributed system using Elixir. This example is a Publisher-Subscriber system.

Execution with IEX

• Node 1

$ iex --sname node1 --cookie pubsub -S mix
iex(node1@host)> {:ok, manager} = Publisher.start
iex(node1@host)> :global.register_name('manager', manager)

• Node 2

$ iex --sname node2 --cookie pubsub -S mix
iex(node2@host)> Node.connect :'node1@host'
iex(node2@host)> manager = :global.whereis_name('manager')
iex(node2@host)> {:ok, subscriber} = Subscriber.start
iex(node2@host)> Publisher.subscribe(manager, 'subs_node2', subscriber)

• Node 3

$ iex --sname node3 --cookie pubsub -S mix
iex(node3@host)> Node.connect :'node1@host'
iex(node3@host)> manager = :global.whereis_name('manager')
iex(node3@host)> {:ok, subscriber} = Subscriber.start
iex(node3@host)> Publisher.subscribe(manager, 'subs_node3', subscriber)

• How to publish a message

iex> Publisher.notify(manager, "Hello !!")