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eventstore
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0.0.1
Event store using PostgreSQL for persistence.
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Files
lib/event_store/storage/create_stream.ex
defmodule EventStore.Storage.CreateStream do
@moduledoc false
require Logger
alias EventStore.Sql.Statements
def execute(conn, stream_uuid, opts \\ []) do
_ = Logger.debug(fn -> "Attempting to create stream #{stream_uuid}" end)
conn
|> Postgrex.query(Statements.create_stream, [stream_uuid], opts)
|> handle_create_response(stream_uuid)
end
defp handle_create_response({:ok, %Postgrex.Result{rows: [[stream_id]]}}, stream_uuid) do
_ = Logger.debug(fn -> "Created stream #{inspect stream_uuid} (id: #{stream_id})" end)
{:ok, stream_id}
end
defp handle_create_response({:error, %Postgrex.Error{postgres: %{code: :unique_violation}}}, stream_uuid) do
_ = Logger.warn(fn -> "Failed to create stream #{inspect stream_uuid}, already exists" end)
{:error, :stream_exists}
end
defp handle_create_response({:error, error}, stream_uuid) do
_ = Logger.warn(fn -> "Failed to create stream #{inspect stream_uuid} due to: #{inspect error}" end)
{:error, error}
end
end