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Objectbox storage extension for the stash API. Provides support to store vaults and caches in a Objectbox database

stash_objectbox #

A stash storage extension for objectbox

Pub Package Coverage Status Package Documentation GitHub License

Overview #

This storage extension for stash provides a objectbox based storage that relies on a highly performing binary serialization of the items through the use of msgpack serialization format.

Getting Started #

Add this to your pubspec.yaml (or create it) replacing x.x.x with the latest version of stash_objectbox:

dependencies:
    stash_objectbox: ^x.x.x

Run the following command to install dependencies:

dart pub get

Finally, to start developing import the library:

import 'package:stash/stash_api.dart';
import 'package:stash_objectbox/stash_objectbox.dart';

Usage #

Vault #

The example bellow creates a vault with a objectbox storage backend. In this rather simple example the serialization and deserialization of the object is coded by hand but it's more usual to rely on libraries like json_serializable.

import 'dart:io';

import 'package:stash/stash_api.dart';
import 'package:stash_objectbox/stash_objectbox.dart';

class Task {
  final int id;
  final String title;
  final bool completed;

  Task({required this.id, required this.title, this.completed = false});

  /// Creates a [Task] from json map
  factory Task.fromJson(Map<String, dynamic> json) => Task(
      id: json['id'] as int,
      title: json['title'] as String,
      completed: json['completed'] as bool);

  /// Creates a json map from a [Task]
  Map<String, dynamic> toJson() =>
      <String, dynamic>{'id': id, 'title': title, 'completed': completed};

  @override
  String toString() {
    return 'Task $id, "$title" is ${completed ? "completed" : "not completed"}';
  }
}

void main() async {
  // Temporary directory
  final path = Directory.systemTemp.path;

  // Creates a store
  final store = await newObjectboxLocalVaultStore(path: path);

  // Creates a vault from the previously created store
  final vault = await store.vault<Task>(
      name: 'vault',
      fromEncodable: (json) => Task.fromJson(json),
      eventListenerMode: EventListenerMode.synchronous)
    ..on<VaultEntryCreatedEvent<Task>>().listen(
        (event) => print('Key "${event.entry.key}" added to the vault'));

  // Adds a task with key 'task1' to the vault
  await vault.put(
      'task1', Task(id: 1, title: 'Run vault store example', completed: true));
  // Retrieves the value from the vault
  print(await vault.get('task1'));
}

Cache #

The example bellow creates a cache with a objectbox storage backend. In this rather simple example the serialization and deserialization of the object is coded by hand but it's more usual to rely on libraries like json_serializable.

import 'dart:io';

import 'package:stash/stash_api.dart';
import 'package:stash_objectbox/stash_objectbox.dart';

class Task {
  final int id;
  final String title;
  final bool completed;

  Task({required this.id, required this.title, this.completed = false});

  /// Creates a [Task] from json map
  factory Task.fromJson(Map<String, dynamic> json) => Task(
      id: json['id'] as int,
      title: json['title'] as String,
      completed: json['completed'] as bool);

  /// Creates a json map from a [Task]
  Map<String, dynamic> toJson() =>
      <String, dynamic>{'id': id, 'title': title, 'completed': completed};

  @override
  String toString() {
    return 'Task $id, "$title" is ${completed ? "completed" : "not completed"}';
  }
}

void main() async {
  // Temporary directory
  final path = Directory.systemTemp.path;

  // Creates a store
  final store = await newObjectboxLocalCacheStore(path: path);

  // Creates a cache with a capacity of 10 from the previously created store
  final cache = await store.cache<Task>(
      name: 'cache1',
      fromEncodable: (json) => Task.fromJson(json),
      maxEntries: 10,
      eventListenerMode: EventListenerMode.synchronous)
    ..on<CacheEntryCreatedEvent<Task>>().listen(
        (event) => print('Key "${event.entry.key}" added to the cache'));

  // Adds a task with key 'task1' to the cache
  await cache.put(
      'task1', Task(id: 1, title: 'Run cache store example', completed: true));
  // Retrieves the value from the cache
  print(await cache.get('task1'));
}

Additional Features #

Please take a look at the documentation of stash to gather additional information and to explore the full range of capabilities of the stash library

Features and Bugs #

Please file feature requests and bugs at the issue tracker.

License #

This project is licensed under the MIT License - see the LICENSE file for details

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Publisher

verified publisher iconivoleitao.dev

Objectbox storage extension for the stash API. Provides support to store vaults and caches in a Objectbox database

Repository (GitHub)
View/report issues

Documentation

API reference

License

Icon for licenses.MIT (LICENSE)

Dependencies

flat_buffers, meta, objectbox, path, stash

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Packages that depend on stash_objectbox