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defmodule WalletIntegrations.IntegrationExceptionStore do |
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@moduledoc """ |
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ETS-backed GenServer for IntegrationException persistence. |
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Tables: |
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- `:wallet_integrations_exceptions` — keyed by exception_id. |
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- `:wallet_integrations_exc_transfer_idx` — bag: {transfer_id, exception_id}. |
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- `:wallet_integrations_exc_prov_ref_idx` — bag: {provider_reference, exception_id}. |
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- `:wallet_integrations_exc_status_idx` — bag: {status, exception_id}. |
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""" |
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use GenServer |
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alias WalletIntegrations.IntegrationException |
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@table :wallet_integrations_exceptions |
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@xfer_idx :wallet_integrations_exc_transfer_idx |
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@prov_idx :wallet_integrations_exc_prov_ref_idx |
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@status_idx :wallet_integrations_exc_status_idx |
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def start_link(opts), do: GenServer.start_link(__MODULE__, opts, name: __MODULE__) |
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@spec store(IntegrationException.t()) :: :ok | {:error, :duplicate_exception_id} |
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def store(%IntegrationException{} = ex), do: GenServer.call(__MODULE__, {:store, ex}) |
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@spec get(exception_id :: String.t()) :: {:ok, IntegrationException.t()} | {:error, :not_found} |
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def get(id), do: GenServer.call(__MODULE__, {:get, id}) |
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@spec update(IntegrationException.t()) :: :ok | {:error, :not_found} |
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def update(%IntegrationException{} = ex), do: GenServer.call(__MODULE__, {:update, ex}) |
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@spec list_by_status(status :: atom()) :: [IntegrationException.t()] |
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def list_by_status(status), do: GenServer.call(__MODULE__, {:list_by_status, status}) |
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@spec list_by_transfer(transfer_id :: String.t()) :: [IntegrationException.t()] |
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def list_by_transfer(transfer_id), do: GenServer.call(__MODULE__, {:list_by_transfer, transfer_id}) |
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@spec list_by_provider_ref(provider_ref :: String.t()) :: [IntegrationException.t()] |
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def list_by_provider_ref(ref), do: GenServer.call(__MODULE__, {:list_by_prov_ref, ref}) |
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@spec list_open() :: [IntegrationException.t()] |
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def list_open, do: list_by_status(:open) |
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@spec reset() :: :ok |
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def reset, do: GenServer.call(__MODULE__, :reset) |
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@impl true |
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def init(_opts) do |
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:ets.new(@table, [:set, :protected, :named_table]) |
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:ets.new(@xfer_idx, [:bag, :protected, :named_table]) |
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:ets.new(@prov_idx, [:bag, :protected, :named_table]) |
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:ets.new(@status_idx, [:bag, :protected, :named_table]) |
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{:ok, %{}} |
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end |
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@impl true |
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def handle_call({:store, ex}, _from, state) do |
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if :ets.member(@table, ex.exception_id) do |
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{:reply, {:error, :duplicate_exception_id}, state} |
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else |
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:ets.insert(@table, {ex.exception_id, ex}) |
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if ex.transfer_id, do: :ets.insert(@xfer_idx, {ex.transfer_id, ex.exception_id}) |
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if ex.provider_reference, do: :ets.insert(@prov_idx, {ex.provider_reference, ex.exception_id}) |
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:ets.insert(@status_idx, {ex.status, ex.exception_id}) |
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{:reply, :ok, state} |
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end |
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end |
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@impl true |
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def handle_call({:get, id}, _from, state) do |
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result = |
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case :ets.lookup(@table, id) do |
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[{_, ex}] -> {:ok, ex} |
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[] -> {:error, :not_found} |
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end |
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{:reply, result, state} |
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end |
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@impl true |
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def handle_call({:update, ex}, _from, state) do |
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result = |
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case :ets.lookup(@table, ex.exception_id) do |
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[{_, old}] -> |
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# Update status index: remove old entry, add new |
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:ets.delete_object(@status_idx, {old.status, old.exception_id}) |
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:ets.insert(@status_idx, {ex.status, ex.exception_id}) |
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:ets.insert(@table, {ex.exception_id, ex}) |
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:ok |
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[] -> |
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{:error, :not_found} |
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end |
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{:reply, result, state} |
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end |
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@impl true |
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def handle_call({:list_by_status, status}, _from, state) do |
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ids = :ets.lookup(@status_idx, status) |> Enum.map(fn {_, id} -> id end) |
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items = fetch_many(ids) |
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{:reply, items, state} |
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end |
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@impl true |
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def handle_call({:list_by_transfer, transfer_id}, _from, state) do |
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ids = :ets.lookup(@xfer_idx, transfer_id) |> Enum.map(fn {_, id} -> id end) |
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{:reply, fetch_many(ids), state} |
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end |
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@impl true |
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def handle_call({:list_by_prov_ref, ref}, _from, state) do |
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ids = :ets.lookup(@prov_idx, ref) |> Enum.map(fn {_, id} -> id end) |
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{:reply, fetch_many(ids), state} |
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end |
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@impl true |
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def handle_call(:reset, _from, state) do |
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:ets.delete_all_objects(@table) |
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:ets.delete_all_objects(@xfer_idx) |
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:ets.delete_all_objects(@prov_idx) |
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:ets.delete_all_objects(@status_idx) |
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{:reply, :ok, state} |
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end |
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defp fetch_many(ids) do |
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Enum.flat_map(ids, fn id -> |
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case :ets.lookup(@table, id) do |
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[{_, ex}] -> [ex] |
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[] -> [] |
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end |
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end) |
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end |
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end |