disposable 0.0.2

An implementation of disposable for Dart.

An implementation of disposable for Dart.

Introduction

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Software should be like Kleenex, strong and disposable!

• Gotta have [Dart]: http://dartlang.org

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This library originated as a mechinism for cleaning up resources when you're done with them.

Features

• IDisposable - interface
• Disposable - class
• CompositeDisposable - class
• using - global function
• usingAsync - global function

Getting Started

1. Add the following to your project's pubspec.yaml and run pub install.

dependencies:
  disposable: any

2. Add the correct import for your project.

import 'package:disposable/disposable.dart';

3. Start using.

Naive/pointless example:

var recPort = new ReceivePort();
var disposable = new Disposable(() => recPort.close());
... do stuff with recPort
disposable.close();

Better example:

var recPort = new ReceivePort();
using(new Disposable(() => recPort.close()), (disposable) {
	... do stuff with recPort
});

And if you have something that actually implements IDisposable:

using(new MyThing(), (myThing) {
	... do stuff with myThing
});

Finally, if you have something that executes async using a Future:

example from in-progress library Jester @ Git

usingAsync(new SafeReceivePort(), (SafeReceivePort safePort) {
  SendPort sendPort = safePort.toSendPort();
  sendPort.send('stuff');
  return safePort.messages.first; // Return any future here
})
.then((dynamic message) {
  ... message should be 'stuff'
  ... SafeReceivePort will be cleaned up for you, no need to remember to close
});

Goals

• Provide a mechanism to help manage cleanup in applications.
• Originated as a way to help ensure closure of isolate ReceivePorts
• Provide using semantics to auto dispose elements through scope

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Version

0.0.2 ish

Tech

• [Dart] - Dartlang.org: get the JS out!
• Disposable - An implementation of disposable for Dart.

Installation

License

https://github.com/Vizidrix/disposable/blob/master/LICENSE

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Edited

• 26-April-2013 initial release

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Credits

• Vizidrix https://github.com/organizations/Vizidrix
• Perry Birch https://github.com/PerryBirch