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eventstore
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0.0.1
Event store using PostgreSQL for persistence.
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lib/event_store/registration/distributed_registry.ex
defmodule EventStore.Registration.DistributedRegistry do
@moduledoc """
Pub/sub using a local registry and broadcasting messages to all connected
nodes.
"""
@behaviour EventStore.Registration
require Logger
alias EventStore.Registration.{DistributedForwarder, LocalRegistry}
@doc """
Return an optional supervisor spec for the registry.
"""
@spec child_spec() :: [:supervisor.child_spec()]
@impl EventStore.Registration
def child_spec do
LocalRegistry.child_spec() ++
[
DistributedForwarder.child_spec([])
]
end
@doc """
Subscribes the caller to the given topic.
"""
@spec subscribe(
binary,
selector: (EventStore.RecordedEvent.t() -> any()),
mapper: (EventStore.RecordedEvent.t() -> any())
) :: :ok | {:error, term}
@impl EventStore.Registration
def subscribe(topic, opts) do
LocalRegistry.subscribe(topic, opts)
end
@doc """
Broadcasts message on given topic.
"""
@spec broadcast(binary, term) :: :ok | {:error, term}
@impl EventStore.Registration
def broadcast(topic, message) do
:ok = LocalRegistry.broadcast(topic, message)
:ok = DistributedForwarder.broadcast(topic, message)
end
end