30 lines
1.3 KiB
Markdown
30 lines
1.3 KiB
Markdown
# File Service for Angel3
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[](https://dart.dev/null-safety)
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[](https://discord.gg/3X6bxTUdCM)
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[](https://github.com/dart-backend/angel/tree/master/packages/file_service/LICENSE)
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Angel service that persists data to a file on disk, stored as a JSON list. It uses a simple mutex to prevent race conditions, and caches contents in memory until changes are made.
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The file will be created on read/write, if it does not already exist.
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This package is useful in development, as it prevents you from having to install an external database to run your server.
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When running a multi-threaded server, there is no guarantee that file operations will be mutually excluded. Thus, try to only use this one a single-threaded server if possible, or one with very low load.
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While not necessarily *slow*, this package makes no promises about performance.
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## Usage
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```dart
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configureServer(Angel app) async {
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// Just like a normal service
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app.use(
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'/api/todos',
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JsonFileService(
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const LocalFileSystem().file('todos_db.json')
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),
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);
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}
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```
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