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Postgres sync engine. Sync little subsets of your Postgres data into local apps and services.
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lib/electric/process_registry.ex
defmodule Electric.ProcessRegistry do
@spec child_spec([Registry.start_option()]) :: Supervisor.child_spec()
def child_spec(options) do
options =
options
|> Keyword.put_new(:name, registry_name(Keyword.fetch!(options, :stack_id)))
|> Keyword.put(:keys, :unique)
%{
id: Keyword.get(options, :name, Registry),
start: {__MODULE__, :start_link, [options]},
type: :supervisor
}
end
def start_link(opts), do: Registry.start_link(opts)
def registry_name(stack_id) when is_atom(stack_id) or is_binary(stack_id),
do: :"#{__MODULE__}:#{stack_id}"
def name(stack_id, key, sub_key \\ nil) when not is_nil(stack_id) do
{:via, Registry, {registry_name(stack_id), {key, sub_key}}}
end
def alive?(stack_id, key, sub_key \\ nil) do
case GenServer.whereis(name(stack_id, key, sub_key)) do
nil -> false
_ -> true
end
rescue
# if the registry is not started, whereis will raise - we can
# assume that the process is not alive
ArgumentError -> false
end
end