Dime is Dart based Dependency Injection framework.

Dime allows to create modules and inject based on interfaces, provides way to specify factory methods and tag based same type instances. Support for multiple modules and scopes with Closable interface to cleanup resources.

Get it from pub page: Pub dime page

Note: All examples below are from example file file. Go there for high level view.

Usage

A simple usage example:

import 'package:dime/dime.dart';

void main() {
  /// Service Module does include details how to create the objects.   
  Dime.installModule(ServiceModule());
     
  MyTitleService titleService = Dime.inject();
  print(titleService.text());
  
}


Setup

Add package dependency to pubspec.yaml:

 depedency: 
   ...
   dime: ^0.2.0
   ...

Define module:

Create a module and how it creates its dependencies:

class MyModule  extends BaseAppInjectorModule {
    @override
    void updateInjections() {
        /// define injection factories - below for examples      
    }
}

Below are examples that can be used inside updateInjections method.

Singleton per type

Inject single value by its class type:

  addSingle(MyTitleService());

Inject singleton value by implementing interface:

  addSingle<TitleService>(MyTitleService());

Singleton per type with tag

Inject single value by its class type:

  addSingle(MyTitleService(), tag: "home-title");
  addSingle(MyTitleService(), tag: "details-title");

Inject singleton value by implementing interface:

  addSingle<TitleService>(MyTitleService(), tag: "home-title");

Creator on-demand injection, it uses type of Creator

This is creator - which will create an object at time of injection.

typedef T Creator<T>(String tag);

The Creator provides optional String tag that may be used to create the tagged instance.

addCreator<TextService>((tag) =>
        MyTitleService(title: "Test title: $tag: now: ${DateTime.now()}"));

Creator on-demand injection with singleton storage - delayed singleton.

Similar to above example with addCreator, however created instance will be cached per tag.

addSingleByCreator((tag)=>MyDescriptionService());

Create your own factory.

You can always create your own factory by extending InjectFactory<T> and add those to the module.

 addFactory(MyTooltipService, MyCustomFactory());

Note: There are some other Factories already provided to be used - like:

  • InjectTagFactory for create method with a Tag
  • TaggedSingletonInjectFactory - for tagged singletons with Closeable interface
  • SingleInjectFactory - single inject factory with Closable interface

Add modules to the scope (global too)

You can add modules to the main global scope of Dime or into the opened scopes. When a scope closes all modules in that scope will also close (clean up) by calling each of its Closeable factory close() method to cleanup resources.

Add Module to Global Dime scope.

  Dime.installModule(ServiceModule());

Features and bugs

Please file feature requests and bugs at the issue tracker.

Libraries

dime
Support for doing something awesome. [...]