feat(linux): Get the isolate implementation somewhat working

This commit is contained in:
PapaTutuWawa 2023-09-10 21:58:07 +02:00
parent cefe90b93a
commit 01374a8eb9
10 changed files with 801 additions and 590 deletions

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@ -20,10 +20,10 @@ class MoxxyBackgroundServiceApi {
Future<String> getExtraData() async {
final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.getExtraData', codec,
'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.getExtraData',
codec,
binaryMessenger: _binaryMessenger);
final List<Object?>? replyList =
await channel.send(null) as List<Object?>?;
final List<Object?>? replyList = await channel.send(null) as List<Object?>?;
if (replyList == null) {
throw PlatformException(
code: 'channel-error',
@ -47,7 +47,8 @@ class MoxxyBackgroundServiceApi {
Future<void> setNotificationBody(String arg_body) async {
final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.setNotificationBody', codec,
'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.setNotificationBody',
codec,
binaryMessenger: _binaryMessenger);
final List<Object?>? replyList =
await channel.send(<Object?>[arg_body]) as List<Object?>?;
@ -69,7 +70,8 @@ class MoxxyBackgroundServiceApi {
Future<void> sendData(String arg_data) async {
final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.sendData', codec,
'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.sendData',
codec,
binaryMessenger: _binaryMessenger);
final List<Object?>? replyList =
await channel.send(<Object?>[arg_data]) as List<Object?>?;
@ -93,8 +95,7 @@ class MoxxyBackgroundServiceApi {
final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
'dev.flutter.pigeon.moxxy_native.MoxxyBackgroundServiceApi.stop', codec,
binaryMessenger: _binaryMessenger);
final List<Object?>? replyList =
await channel.send(null) as List<Object?>?;
final List<Object?>? replyList = await channel.send(null) as List<Object?>?;
if (replyList == null) {
throw PlatformException(
code: 'channel-error',

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@ -0,0 +1,53 @@
import 'dart:convert';
import 'dart:isolate';
import 'dart:ui';
import 'package:logging/logging.dart';
import 'package:moxlib/moxlib.dart';
import 'package:moxxy_native/src/service/background/base.dart';
import 'package:moxxy_native/src/service/config.dart';
import 'package:moxxy_native/src/service/datasender/types.dart';
import 'package:uuid/uuid.dart';
class IsolateBackgroundService extends BackgroundService {
IsolateBackgroundService(this._sendPort);
final SendPort _sendPort;
final ReceivePort receivePort = ReceivePort();
/// A logger.
final Logger _log = Logger('IsolateBackgroundService');
@override
Future<void> send(BackgroundEvent event, {String? id}) async {
final data = DataWrapper(
id ?? const Uuid().v4(),
event,
);
_sendPort.send(jsonEncode(data.toJson()));
}
@override
Future<void> init(
ServiceConfig config,
) async {
// Ensure that the Dart executor is ready to use plugins
// NOTE: We're not allowed to use this here. Maybe reusing the RootIsolateToken
// (See IsolateForegroundService) helps?
// WidgetsFlutterBinding.ensureInitialized();
DartPluginRegistrant.ensureInitialized();
// Register the channel for Foreground -> Service communication
receivePort.listen((data) async {
// TODO(Unknown): Maybe do something smarter like pigeon and use Lists instead of Maps
await config
.handleData(jsonDecode(data! as String) as Map<String, dynamic>);
});
// Start execution
_log.finest('Setup complete. Calling main entrypoint...');
await config.entrypoint(config.initialLocale);
}
@override
void setNotificationBody(String body) {}
}

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@ -0,0 +1,15 @@
import 'dart:convert';
import 'dart:isolate';
import 'package:moxlib/moxlib.dart';
import 'package:moxxy_native/src/service/datasender/types.dart';
class IsolateForegroundServiceDataSender
extends AwaitableDataSender<BackgroundCommand, BackgroundEvent> {
IsolateForegroundServiceDataSender(this._port);
final SendPort _port;
@override
Future<void> sendDataImpl(DataWrapper<JsonImplementation> data) async {
_port.send(jsonEncode(data.toJson()));
}
}

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@ -1,8 +1,4 @@
import 'dart:io';
import 'package:moxlib/moxlib.dart';
import 'package:moxxy_native/pigeon/service.g.dart';
import 'package:moxxy_native/src/service/datasender/pigeon.dart';
import 'package:moxxy_native/src/service/exceptions.dart';
typedef ForegroundServiceDataSender
= AwaitableDataSender<BackgroundCommand, BackgroundEvent>;
@ -10,11 +6,3 @@ typedef ForegroundServiceDataSender
abstract class BackgroundCommand implements JsonImplementation {}
abstract class BackgroundEvent implements JsonImplementation {}
ForegroundServiceDataSender getForegroundDataSender(MoxxyServiceApi api) {
if (Platform.isAndroid) {
return PigeonForegroundServiceDataSender(api);
} else {
throw UnsupportedPlatformException();
}
}

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@ -0,0 +1,28 @@
import 'dart:io';
import 'package:moxxy_native/src/service/config.dart';
import 'package:moxxy_native/src/service/entrypoints/isolate.dart';
import 'package:moxxy_native/src/service/entrypoints/pigeon.dart';
import 'package:moxxy_native/src/service/exceptions.dart';
typedef PlatformEntrypointCallback = Future<void> Function(dynamic);
ServiceConfig getServiceConfig(
HandleEventCallback srvHandleData,
HandleEventCallback uiHandleData,
String initialLocale,
) {
PlatformEntrypointCallback entrypoint;
if (Platform.isAndroid) {
entrypoint = pigeonEntrypoint;
} else if (Platform.isLinux || Platform.isWindows || Platform.isMacOS) {
entrypoint = isolateEntrypoint;
} else {
throw UnsupportedPlatformException();
}
return ServiceConfig(
entrypoint,
srvHandleData,
initialLocale,
);
}

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@ -0,0 +1,30 @@
import 'dart:isolate';
import 'package:flutter/services.dart';
import 'package:get_it/get_it.dart';
import 'package:moxxy_native/src/service/background/base.dart';
import 'package:moxxy_native/src/service/background/isolate.dart';
import 'package:moxxy_native/src/service/config.dart';
@pragma('vm:entry-point')
Future<void> isolateEntrypoint(dynamic parameters) async {
parameters as List<dynamic>;
final sendPort = parameters[0] as SendPort;
final config = ServiceConfig.fromString(parameters[1] as String);
// This allows us to use the root isolate's method channels.
// See https://medium.com/flutter/introducing-background-isolate-channels-7a299609cad8
BackgroundIsolateBinaryMessenger.ensureInitialized(
parameters[2] as RootIsolateToken,
);
// Set up the background service
final srv = IsolateBackgroundService(sendPort);
GetIt.I.registerSingleton<BackgroundService>(srv);
// Reply back with the new send port
sendPort.send(srv.receivePort.sendPort);
// Run the entrypoint
await srv.init(config);
}

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@ -8,7 +8,7 @@ import 'package:moxxy_native/src/service/config.dart';
/// An entrypoint that should be used when the service runs
/// in a new Flutter Engine.
@pragma('vm:entry-point')
Future<void> pigeonEntrypoint() async {
Future<void> pigeonEntrypoint(dynamic _) async {
// ignore: avoid_print
print('androidEntrypoint: Called on new FlutterEngine');

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@ -3,6 +3,7 @@ import 'package:moxlib/moxlib.dart';
import 'package:moxxy_native/src/service/config.dart';
import 'package:moxxy_native/src/service/datasender/types.dart';
import 'package:moxxy_native/src/service/exceptions.dart';
import 'package:moxxy_native/src/service/foreground/isolate.dart';
import 'package:moxxy_native/src/service/foreground/pigeon.dart';
/// Wrapper API that is only available to the UI isolate.
@ -40,6 +41,8 @@ ForegroundService getForegroundService() {
if (_service == null) {
if (Platform.isAndroid) {
_service = PigeonForegroundService();
} else if (Platform.isLinux || Platform.isWindows || Platform.isMacOS) {
_service = IsolateForegroundService();
} else {
throw UnsupportedPlatformException();
}

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@ -0,0 +1,98 @@
import 'dart:async';
import 'dart:convert';
import 'dart:isolate';
import 'dart:ui';
import 'package:logging/logging.dart';
import 'package:moxxy_native/src/service/config.dart';
import 'package:moxxy_native/src/service/datasender/isolate.dart';
import 'package:moxxy_native/src/service/datasender/types.dart';
import 'package:moxxy_native/src/service/entrypoints/isolate.dart';
import 'package:moxxy_native/src/service/foreground/base.dart';
class IsolateForegroundService extends ForegroundService {
/// The port on which we receive data from the isolate.
final ReceivePort _receivePort = ReceivePort();
/// The port on which we send data to the isolate.
late final SendPort _sendPort;
/// A completer that indicates when _sendPort has been set.
/// For more notes, see the comment in [start].
Completer<void>? _sendPortCompleter = Completer<void>();
/// The data sender backing this class.
late final IsolateForegroundServiceDataSender _dataSender;
/// A logger.
final Logger _log = Logger('IsolateForegroundService');
@override
Future<void> attach(
HandleEventCallback handleData,
) async {
_receivePort.asBroadcastStream().listen((data) async {
if (data is SendPort) {
// Set the send port.
_sendPort = data;
// Resolve the waiting future.
assert(
_sendPortCompleter != null,
'_sendPort should only be received once!',
);
_sendPortCompleter?.complete();
return;
}
await handleData(
jsonDecode(data! as String) as Map<String, dynamic>,
);
});
}
@override
Future<void> start(
ServiceConfig config,
HandleEventCallback uiHandleData,
) async {
// Listen for events
await attach(uiHandleData);
await Isolate.spawn(
isolateEntrypoint,
[
_receivePort.sendPort,
config.toString(),
RootIsolateToken.instance!,
],
);
// Wait for [_sendPort] to get set.
// The issue is that [_receivePort] provides a stream that only one listener can listen to.
// This means that we cannot do `await _receivePort.first`. To work around this, we just cram
// an approximation of `_receivePort.first` into the actual listener.
await _sendPortCompleter!.future;
_sendPortCompleter = null;
// Create the data sender
_dataSender = IsolateForegroundServiceDataSender(_sendPort);
_log.finest('Background service started...');
}
@override
Future<bool> isRunning() async => false;
@override
ForegroundServiceDataSender getDataSender() => _dataSender;
@override
Future<BackgroundEvent?> send(
BackgroundCommand command, {
bool awaitable = true,
}) {
return _dataSender.sendData(
command,
awaitable: awaitable,
);
}
}