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Added unsubscribe function that matches on metadata #192

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Added unsubscribe function that matches on metadata #192

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11 changes: 11 additions & 0 deletions lib/phoenix/pubsub.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -132,6 +132,17 @@ defmodule Phoenix.PubSub do
Registry.unregister(pubsub, topic)
end

@doc """
Unsubscribes the caller from the PubSub adapter's topic taking the metadata into consideration
Unlike `unsubscribe/2` this function match on the metadata provided as option when subscribed

This is usually needed if you have multiple subscriptions for the same topic with different metadata
"""
@spec unsubscribe(t, topic, metadata) :: :ok
def unsubscribe(pubsub, topic, metadata) when is_atom(pubsub) and is_binary(topic) do
Registry.unregister_match(pubsub, topic, metadata)
end

@doc """
Broadcasts message on given topic across the whole cluster.

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