Phoenix Channels junichi kuriyama(@astapi) 2016.08.31 tokyo.ex#5

• junichi kuriyama(@astapi) • ॴଐ • ݩ ͳձࣾ • ࢓ࣄͰ͸Rubyͨ͠ΓElixirͨ͠ΓΠϯϑϥ(AWS)ͯ͠·͢ • ٳ೔͸Erlangͨ͠ΓElixirͨ͠Γͯ͠·͢

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WebSocket Ͱେมͳͱ͜Ζ Λ৭ʑ΍ͬͯ͘ΕΔ΍ͭ

• ઀ଓपΓ • connection؅ཧ • pubsub • broadcast௨৴

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େ͖͘3module͋Δ ※ݸਓͷײ૝Ͱ͢

• Transports • Channel • PubSub

Transports • cowboy < - > channel ( message dispatch) • encode & decode • phoenix message < -> json • WebSocket & LongPolling ( fall back )

Channel • GenServer • controllerతͳ • transport < - > channel • transport͕ݺͿɺcall back ϝιουͷ࣮૷ • Rest API ײ֮ͰϩδοΫʹूதͰ͖Δ

xxx_channel.ex def handle_in(“new_msg”, %{“uid” => uid, “body” => body}, socket) do broadcast! socket, “new_msg”, %{uid: uid, body: body} {:noreply, socket} end def handle_in(“create:post”, attrs, socket) do changes = Post.changeset(%Post{}, attrs) if changeset.valid? do Repo.insert!(changeset) {:reply, :ok, socket} else {:reply, :error, socket} end end

PubSub • publish - subscribe • connection process ؅ཧ ( ets ) • pubsub backend • Pg2 ( default) • Redis • RabbitMQ • Postgres

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