stash_sembast

A stash storage extension for sembast

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Introduction

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

Getting Started

Add this to your pubspec.yaml (or create it):

dependencies:
    stash_sembast: ^1.0.0-dev.1

Run the following command to install dependencies:

pub install

Optionally use the following command to run the tests:

pub run test

Finally, to start developing import the library:

import 'package:stash_sembast/stash_sembast.dart';

Usage

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

import 'dart:io';

import 'package:stash_sembast/stash_sembast.dart';

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

  Task({this.id, 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 path
  final path = Directory.systemTemp.path;

  // Creates cache with a Sembast based storage backend with the capacity of 10 entries
  final cache = newSembastCache(path,
      maxEntries: 10, fromEncodable: (json) => Task.fromJson(json));

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

  print(value);
}

Contributing

This library is developed by best effort, in the motto of "Scratch your own itch!", meaning APIs that are meaningful for the author use cases.

If you would like to contribute with other parts of the API, feel free to make a Github pull request as I'm always looking for contributions for:

  • Tests
  • Documentation
  • New APIs

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

Libraries

stash_sembast
Provides a Sembast implementation of the Stash caching API for Dart