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electric
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Postgres sync engine. Sync little subsets of your Postgres data into local apps and services.
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Files
lib/electric/telemetry.ex
defmodule Electric.Telemetry do
require Logger
@log_level Application.compile_env(:electric, :telemetry_log_level, false)
defmacro __using__(_opts) do
quote do
import Electric.Telemetry, only: [with_telemetry: 2]
end
end
# uses the availability of the given dependencies to optionally compile
# the provided block when telemetry is enabled in the application config
defmacro with_telemetry(dependencies, do: block, else: else_block) do
include_with_telemetry(__CALLER__, __ENV__, dependencies, block, else_block)
end
defmacro with_telemetry(dependencies, do: block) do
include_with_telemetry(__CALLER__, __ENV__, dependencies, block, nil)
end
defp include_with_telemetry(caller, env, dependencies, block, else_block) do
modules = List.wrap(dependencies) |> Enum.map(&Macro.expand(&1, env))
telemetry_code_available? = Enum.all?(modules, &Code.ensure_loaded?/1)
if Electric.telemetry_enabled?() && telemetry_code_available? do
if @log_level do
Logger.log(
@log_level,
"Enabling telemetry in #{caller.module || Path.relative_to(caller.file, Path.expand("..", __DIR__))}"
)
end
quote(do: unquote(block))
else
if else_block, do: quote(do: unquote(else_block))
end
end
end