70 lines
1.8 KiB
Dart
70 lines
1.8 KiB
Dart
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library angular2.src.web_workers.ui;
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import 'dart:isolate';
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import 'dart:async';
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import "package:angular2/src/web-workers/shared/message_bus.dart"
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show MessageBus, MessageBusSink, MessageBusSource;
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/**
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* Bootstrapping a WebWorker
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*
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* You instantiate a WebWorker application by calling bootstrap with the URI of your worker's index script
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* Note: The WebWorker script must call bootstrapWebworker once it is set up to complete the bootstrapping process
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*/
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void bootstrap(String uri) {
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throw "Not Implemented";
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}
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/**
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* To be called from the main thread to spawn and communicate with the worker thread
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*/
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Future<UIMessageBus> spawnWorker(Uri uri) {
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var receivePort = new ReceivePort();
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var isolateEndSendPort = receivePort.sendPort;
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return Isolate.spawnUri(uri, const [], isolateEndSendPort).then((_) {
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var source = new UIMessageBusSource(receivePort);
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return source.sink.then((sendPort) {
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var sink = new UIMessageBusSink(sendPort);
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return new UIMessageBus(sink, source);
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});
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});
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}
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class UIMessageBus extends MessageBus {
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final UIMessageBusSink sink;
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final UIMessageBusSource source;
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UIMessageBus(UIMessageBusSink sink, UIMessageBusSource source)
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: sink = sink,
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source = source;
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}
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class UIMessageBusSink extends MessageBusSink {
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final SendPort _port;
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UIMessageBusSink(SendPort port) : _port = port;
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void send(message) {
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_port.send(message);
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}
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}
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class UIMessageBusSource extends MessageBusSource {
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final ReceivePort _port;
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final Stream rawDataStream;
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UIMessageBusSource(ReceivePort port)
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: _port = port,
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rawDataStream = port.asBroadcastStream();
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Future<SendPort> get sink => rawDataStream.firstWhere((message) {
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return message is SendPort;
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});
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void listen(Function fn) {
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rawDataStream.listen((message) {
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fn({"data": message});
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});
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}
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}
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