Add replica for global region support

config/config.exs

@@ -8,6 +8,7 @@
 import Config
 
 config :live_beats,
+  replica: LiveBeats.ReplicaRepo,
   ecto_repos: [LiveBeats.Repo]
 
 # Configures the endpoint

config/dev.exs

@@ -20,6 +20,16 @@ config :live_beats, LiveBeats.Repo,
   show_sensitive_data_on_connection_error: true,
   pool_size: 10
 
+# Configure your replica database
+config :live_beats, LiveBeats.ReplicaRepo,
+  username: "postgres",
+  password: "postgres",
+  database: "live_beats_dev",
+  hostname: "localhost",
+  show_sensitive_data_on_connection_error: true,
+  pool_size: 10,
+  priv: "priv/repo"
+
 # For development, we disable any cache and enable
 # debugging and code reloading.
 #

config/runtime.exs

@@ -19,6 +19,9 @@ if config_env() == :prod do
       For example: ecto://USER:PASS@HOST/DATABASE
       """
 
+  replica_database_url =
+    System.get_env("REPLICA_DATABASE_URL") || database_url
+
   host = System.get_env("PHX_HOST") || "example.com"
   ecto_ipv6? = System.get_env("ECTO_IPV6") == "true"
 
@@ -32,6 +35,13 @@ if config_env() == :prod do
     url: database_url,
     pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10")
 
+  config :live_beats, LiveBeats.ReplicaRepo,
+    # ssl: true,
+    priv: "priv/repo",
+    socket_options: if(ecto_ipv6?, do: [:inet6], else: []),
+    url: replica_database_url,
+    pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10")
+
   secret_key_base =
     System.get_env("SECRET_KEY_BASE") ||
       raise """

config/test.exs

@@ -1,5 +1,8 @@
 import Config
 
+config :live_beats,
+  replica: LiveBeats.Repo
+
 config :live_beats, :files,
   uploads_dir: Path.expand("../tmp/test-uploads", __DIR__),
   host: [scheme: "http", host: "localhost", port: 4000],
@@ -18,6 +21,16 @@ config :live_beats, LiveBeats.Repo,
   pool: Ecto.Adapters.SQL.Sandbox,
   pool_size: 10
 
+config :live_beats, LiveBeats.ReplicaRepo,
+  username: "postgres",
+  password: "postgres",
+  database: "live_beats_test#{System.get_env("MIX_TEST_PARTITION")}",
+  hostname: "localhost",
+  show_sensitive_data_on_connection_error: true,
+  pool_size: 10,
+  priv: "priv/repo"
+
+
 # We don't run a server during test. If one is required,
 # you can enable the server option below.
 config :live_beats, LiveBeatsWeb.Endpoint,

lib/live_beats/accounts.ex

@@ -18,15 +18,15 @@ defmodule LiveBeats.Accounts do
   defp topic(user_id), do: "user:#{user_id}"
 
   def list_users(opts) do
-    Repo.all(from u in User, limit: ^Keyword.fetch!(opts, :limit))
+    Repo.replica().all(from u in User, limit: ^Keyword.fetch!(opts, :limit))
   end
 
   def get_users_map(user_ids) when is_list(user_ids) do
-    Repo.all(from u in User, where: u.id in ^user_ids, select: {u.id, u})
+    Repo.replica().all(from u in User, where: u.id in ^user_ids, select: {u.id, u})
   end
 
   def lists_users_by_active_profile(id, opts) do
-    Repo.all(
+    Repo.replica().all(
       from u in User, where: u.active_profile_user_id == ^id, limit: ^Keyword.fetch!(opts, :limit)
     )
   end
@@ -84,11 +84,11 @@ defmodule LiveBeats.Accounts do
       ** (Ecto.NoResultsError)
 
   """
-  def get_user!(id), do: Repo.get!(User, id)
+  def get_user!(id), do: Repo.replica().get!(User, id)
 
-  def get_user(id), do: Repo.get(User, id)
+  def get_user(id), do: Repo.replica().get(User, id)
 
-  def get_user_by!(fields), do: Repo.get_by!(User, fields)
+  def get_user_by!(fields), do: Repo.replica().get_by!(User, fields)
 
   def update_active_profile(%User{active_profile_user_id: same_id} = current_user, same_id) do
     current_user

lib/live_beats/application.ex

@@ -15,6 +15,7 @@ defmodule LiveBeats.Application do
       {Task.Supervisor, name: LiveBeats.TaskSupervisor},
       # Start the Ecto repository
       LiveBeats.Repo,
+      LiveBeats.ReplicaRepo,
       # Start the Telemetry supervisor
       LiveBeatsWeb.Telemetry,
       # Start the PubSub system

lib/live_beats/media_library.ex

@@ -228,13 +228,13 @@ defmodule LiveBeats.MediaLibrary do
   end
 
   def list_genres do
-    Repo.all(Genre, order_by: [asc: :title])
+    Repo.replica().all(Genre, order_by: [asc: :title])
   end
 
   def list_profile_songs(%Profile{} = profile, limit \\ 100) do
     from(s in Song, where: s.user_id == ^profile.user_id, limit: ^limit)
     |> order_by_playlist(:asc)
-    |> Repo.all()
+    |> Repo.replica().all()
   end
 
   def list_active_profiles(opts) do
@@ -246,12 +246,12 @@ defmodule LiveBeats.MediaLibrary do
       order_by: [desc: s.updated_at],
       select: struct(u, [:id, :username, :profile_tagline, :avatar_url, :external_homepage_url])
     )
-    |> Repo.all()
+    |> Repo.replica().all()
     |> Enum.map(&get_profile!/1)
   end
 
   def get_current_active_song(%Profile{user_id: user_id}) do
-    Repo.one(from s in Song, where: s.user_id == ^user_id and s.status in [:playing, :paused])
+    Repo.replica().one(from s in Song, where: s.user_id == ^user_id and s.status in [:playing, :paused])
   end
 
   def get_profile!(%Accounts.User{} = user) do
@@ -286,7 +286,7 @@ defmodule LiveBeats.MediaLibrary do
     end
   end
 
-  def get_song!(id), do: Repo.get!(Song, id)
+  def get_song!(id), do: Repo.replica().get!(Song, id)
 
   def get_first_song(%Profile{user_id: user_id}) do
     from(s in Song,
@@ -294,7 +294,7 @@ defmodule LiveBeats.MediaLibrary do
       limit: 1
     )
     |> order_by_playlist(:asc)
-    |> Repo.one()
+    |> Repo.replica().one()
   end
 
   def get_last_song(%Profile{user_id: user_id}) do
@@ -303,7 +303,7 @@ defmodule LiveBeats.MediaLibrary do
       limit: 1
     )
     |> order_by_playlist(:desc)
-    |> Repo.one()
+    |> Repo.replica().one()
   end
 
   def get_next_song(%Song{} = song, %Profile{} = profile) do
@@ -313,7 +313,7 @@ defmodule LiveBeats.MediaLibrary do
         limit: 1
       )
       |> order_by_playlist(:asc)
-      |> Repo.one()
+      |> Repo.replica().one()
 
     next || get_first_song(profile)
   end
@@ -326,7 +326,7 @@ defmodule LiveBeats.MediaLibrary do
         limit: 1
       )
       |> order_by_playlist(:desc)
-      |> Repo.one()
+      |> Repo.replica().one()
 
     prev || get_last_song(profile)
   end

lib/live_beats/repo.ex

@@ -2,4 +2,12 @@ defmodule LiveBeats.Repo do
   use Ecto.Repo,
     otp_app: :live_beats,
     adapter: Ecto.Adapters.Postgres
+
+  def replica, do: LiveBeats.config([:replica])
+end
+
+defmodule LiveBeats.ReplicaRepo do
+  use Ecto.Repo,
+    otp_app: :live_beats,
+    adapter: Ecto.Adapters.Postgres
 end