ETS-backed storage for Top-up resources.
Uses the shared store pattern via use PaperTiger.Store which provides:
- GenServer wraps ETS table
- Reads go directly to ETS (concurrent, fast)
- Writes go through GenServer (serialized, safe)
Architecture
- ETS Table:
:paper_tiger_topups(public, read_concurrency: true) - GenServer: Serializes writes, handles initialization
- Shared Implementation: All CRUD operations via PaperTiger.Store
Examples
# Direct read (no GenServer bottleneck)
{:ok, topup} = PaperTiger.Store.Topups.get("tu_123")
# Serialized write
topup = %{id: "tu_123", status: "pending", ...}
{:ok, topup} = PaperTiger.Store.Topups.insert(topup)
# Query helpers (direct ETS access)
topups = PaperTiger.Store.Topups.find_by_status("succeeded")Summary
Functions
Returns a specification to start this module under a supervisor.
Clears all topups from the store (all namespaces).
Clears all topups for a specific namespace.
Counts total topups in current namespace.
Deletes a topup from the store.
Finds top-ups by status.
Retrieves a topup by ID.
Retrieves a topup only when it belongs to the given owner.
Inserts a topup into the store.
Lists all topups with optional pagination.
Returns all items in a specific namespace.
Validates and applies child-resource mutations in one serialized store call.
Returns the ID prefix for this resource.
Starts the topup store GenServer.
Returns the ETS table name for this store.
Updates a topup in the store.
Functions
Returns a specification to start this module under a supervisor.
See Supervisor.
@spec clear() :: :ok
Clears all topups from the store (all namespaces).
Serialized write - goes through GenServer.
Useful for test cleanup. Note: This clears ALL data, not just
the current namespace. For namespace-specific cleanup, use
clear_namespace/1.
Clears all topups for a specific namespace.
Used by PaperTiger.Test to clean up after each test.
@spec count() :: non_neg_integer()
Counts total topups in current namespace.
Direct ETS access - does not go through GenServer.
@spec delete(String.t()) :: :ok
Deletes a topup from the store.
Serialized write - goes through GenServer. Data is scoped to the current test namespace.
Finds top-ups by status.
Direct ETS access - does not go through GenServer.
Retrieves a topup by ID.
Direct ETS access - does not go through GenServer. Data is scoped to the current test namespace.
Retrieves a topup only when it belongs to the given owner.
Missing resources and resources owned by a different parent both return
{:error, :not_found} so nested endpoints do not disclose foreign IDs.
Inserts a topup into the store.
Serialized write - goes through GenServer to prevent race conditions. Data is scoped to the current test namespace.
@spec list(keyword() | map()) :: PaperTiger.List.t()
Lists all topups with optional pagination.
Direct ETS access - does not go through GenServer. Data is scoped to the current test namespace.
Options
:limit- Number of items (default: 10, max: 100):starting_after- Cursor for pagination:ending_before- Reverse cursor
Returns all items in a specific namespace.
Useful for debugging test isolation.
@spec mutate_owned(atom(), term(), [ {:insert | :update, map()} | {:delete, String.t()} ]) :: :ok | {:error, {:already_exists | :duplicate_operation | :not_found | :not_owned, String.t()}}
Validates and applies child-resource mutations in one serialized store call.
Every operation is checked before any write occurs. Inserts must use new
IDs, updates and deletes must target existing resources owned by
owner_id, and an ID may appear only once in the batch.
@spec prefix() :: String.t() | nil
Returns the ID prefix for this resource.
@spec start_link(keyword()) :: GenServer.on_start()
Starts the topup store GenServer.
@spec table_name() :: atom()
Returns the ETS table name for this store.
Updates a topup in the store.
Serialized write - goes through GenServer. Data is scoped to the current test namespace.