Graham McIntire
7db78675a2
- SharedPacketHandler.handle_packet_update: dispatch on filter-result, and use maybe_enrich/2 dispatched on the enrich? boolean instead of an inner `if`. lookup_device_info/1 is now a trio of function heads. - Cluster.Topology.child_spec: build_spec/3 dispatches on (cluster_enabled?, topologies) tuples — no more nested `if`. - Cluster.PacketDistributor.distribute_packet: maybe_broadcast/2 dispatches on the leader-and-enabled check; the non-leader / disabled paths return :ok explicitly instead of relying on an `if` expression's implicit nil. Adds tests for SharedPacketHandler (filter/enrich/match paths, callsign_filter + callsign_and_weather_filter factories) and extends Cluster.Topology tests to cover the nil-topology and opts-merge cases. Coverage 66.41 → 66.81%.
58 lines
1.6 KiB
Elixir
58 lines
1.6 KiB
Elixir
defmodule Aprsme.Cluster.PacketDistributor do
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@moduledoc """
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Distributes APRS packets from the leader node to all cluster members.
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This ensures all nodes can serve real-time updates via LiveView while
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only the leader maintains the APRS-IS connection.
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"""
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use GenServer
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alias Aprsme.Cluster.LeaderElection
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@pubsub_topic "cluster:packets"
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def start_link(opts) do
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GenServer.start_link(__MODULE__, opts, name: __MODULE__)
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end
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def distribute_packet(packet) do
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cluster_enabled = Application.get_env(:aprsme, :cluster_enabled, false)
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maybe_broadcast(cluster_enabled and LeaderElection.leader_cached?(), packet)
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end
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# Only the leader broadcasts; non-leader clustered nodes and non-clustered
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# nodes silently drop the packet.
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defp maybe_broadcast(true, packet) do
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Phoenix.PubSub.broadcast(Aprsme.PubSub, @pubsub_topic, {:distributed_packet, packet})
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end
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defp maybe_broadcast(false, _packet), do: :ok
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def subscribe do
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Phoenix.PubSub.subscribe(Aprsme.PubSub, @pubsub_topic)
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end
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def handle_distributed_packet({:distributed_packet, packet}) do
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Aprsme.StreamingPacketsPubSub.broadcast_packet(packet)
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Aprsme.SpatialPubSub.broadcast_packet(packet)
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:ok
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end
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@impl true
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def handle_info({:distributed_packet, _packet} = msg, state) do
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handle_distributed_packet(msg)
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{:noreply, state}
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end
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@impl true
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def init(_opts) do
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:ok = Phoenix.PubSub.subscribe(Aprsme.PubSub, @pubsub_topic)
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{:ok, %{}}
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end
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@impl true
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def terminate(_reason, _state) do
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_ = Phoenix.PubSub.unsubscribe(Aprsme.PubSub, @pubsub_topic)
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:ok
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end
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end
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