stash_objectbox

Description:

stash objectbox

stash_objectbox #
A stash storage extension for objectbox




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
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Run the following command to install dependencies:
dart pub get
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Finally, to start developing import the library:
import 'package:stash/stash_api.dart';
import 'package:stash_objectbox/stash_objectbox.dart';
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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'));
// Closes the vault
vault.close();
}
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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'));
// Closes the cache
cache.close();
}
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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