---
title: Memory Store
description: In-memory store for development and testing.
---

The memory store keeps all data in memory using Go maps with `sync.RWMutex` for thread safety. Data is lost when the process exits.

## Usage

```go
import "github.com/xraph/warden/store/memory"

st := memory.New()
```

## Characteristics

- **Thread-safe** — All operations use read/write locks
- **Copy-on-write** — List operations return copies, not references
- **No persistence** — Data is lost on restart
- **No migrations** — `Migrate()` is a no-op
- **Fast** — Ideal for unit tests and development

## When to Use

- Unit tests and integration tests
- Development environments
- Prototyping and experimentation
- Standalone scripts and CLI tools

## Interface Compliance

The memory store implements all 7 subsystem store interfaces:

```go
var _ store.Store = (*memory.Store)(nil) // Compile-time check
```

This includes:
- `role.Store` — Role CRUD + hierarchy
- `permission.Store` — Permission CRUD + role attachment
- `assignment.Store` — Assignment CRUD + subject lookup
- `relation.Store` — Relation tuple CRUD + graph queries
- `policy.Store` — Policy CRUD + active policy lookup
- `resourcetype.Store` — Resource type CRUD
- `checklog.Store` — Check log append + query