39 lines
1.1 KiB
Elixir
39 lines
1.1 KiB
Elixir
defmodule HAHandler.PGSQL.Watcher do
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use GenServer
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require Logger
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def start_link(opts) do
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GenServer.start_link(__MODULE__, opts)
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end
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@impl true
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def init(opts) do
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# Configures this worker's jobs to report in the "pgsql" namespace
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Appsignal.Span.set_namespace(Appsignal.Tracer.root_span(), "pgsql")
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# Starts a Postgrex child but does not means the connection was
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# successful.
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# TODO: set dbconnections backoff and connect hooks
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# See https://github.com/elixir-ecto/db_connection/blob/master/lib/db_connection.ex#L343
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case Postgrex.start_link(opts) do
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{:ok, pid} ->
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state = %{
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backend: pid,
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hostname: Keyword.get(opts, :hostname)
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}
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{:ok, state}
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{:error, err} ->
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# Will be catched by the supervisor if anything happen. It should not
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# be triggered even if a PGSQL node down, since Postgrex has its own
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# surpervision tree.
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{:error, err}
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end
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end
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@impl true
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def handle_call({:execute, query, params}, _from, %{backend: backend} = state) do
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{:reply, Postgrex.query(backend, query, params), state}
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end
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end
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