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Postgres sync engine. Sync little subsets of your Postgres data into local apps and services.

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electric lib electric connection manager connection_backoff.ex
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lib/electric/connection/manager/connection_backoff.ex 

defmodule Electric.Connection.Manager.ConnectionBackoff do

  @type connection_backoff :: %{

          backoff: :backoff.backoff(),

          retries_started_at: nil | integer()

        }



  @spec init(pos_integer(), :infinity | pos_integer()) :: connection_backoff()

  def init(start, max),

    do: %{backoff: :backoff.init(start, max), retries_started_at: nil}



  @spec succeed(connection_backoff()) :: {pos_integer(), connection_backoff()}

  def succeed(%{backoff: backoff} = conn_backoff) do

    {_, backoff} = :backoff.succeed(backoff)



    {total_retry_time(conn_backoff), %{backoff: backoff, retries_started_at: nil}}

  end



  @spec fail(connection_backoff()) :: {pos_integer(), connection_backoff()}

  def fail(%{backoff: backoff, retries_started_at: retries_started_at}) do

    {time, backoff} = :backoff.fail(backoff)



    {time,

     %{

       backoff: backoff,

       retries_started_at: retries_started_at || System.monotonic_time(:millisecond)

     }}

  end



  @spec total_retry_time(connection_backoff()) :: pos_integer()

  def total_retry_time(%{retries_started_at: nil}),

    do: 0



  def total_retry_time(%{retries_started_at: retries_started_at}),

    do: System.monotonic_time(:millisecond) - retries_started_at

end