runAsync<Q, T> static method Null safety

CompletableIsolate<T> runAsync<Q, T>(ComputeCallback<Q, T> run, Q message, {IsolateExecutor? isolateExecutor, String debugLabel = 'CompletableIsolate'})

执行一个异步任务 该任务必须是一个全局方法或者静态方法

Implementation

static CompletableIsolate<T> runAsync<Q, T>(
  ComputeCallback<Q, T> run,
  Q message, {
  IsolateExecutor? isolateExecutor,
  String debugLabel = 'CompletableIsolate',
}) {
  CompletableIsolate<T> completableFuture = CompletableIsolate<T>();

  ///初始化线程池
  if (isolateExecutor == null) {
    isolateExecutor = _isolateExecutor;
  }
  completableFuture._isolateExecutor0 = isolateExecutor;

  /// 时间切片
  final Flow flow = Flow.begin();
  Timeline.startSync('$debugLabel: start', flow: flow);
  final ReceivePort resultPort = ReceivePort();
  final ReceivePort errorPort = ReceivePort();
  Timeline.finishSync();
  // 提交任务
  completableFuture._asyncId =
      isolateExecutor.execute<_CompletableIsolateConfiguration<Q, T>>(
    CompletableIsolate._run,
    _CompletableIsolateConfiguration<Q, T>(
      callback: run,
      message: message,
      resultPort: resultPort.sendPort,
      errorPort: errorPort.sendPort,
      flowId: flow.id,
      debugLabel: debugLabel,
    ),
  );

  /// 监听任务回调
  resultPort.listen((result) {
    Timeline.startSync('$debugLabel: end', flow: Flow.end(flow.id));
    completableFuture.result = result;
    resultPort.close();
    errorPort.close();
    Timeline.finishSync();
    completableFuture._runCallback();
    completableFuture._completeCallback();
  });
  errorPort.listen((errorData) {
    Timeline.startSync('$debugLabel: end', flow: Flow.end(flow.id));
    completableFuture.error = errorData[0];
    completableFuture.stackTrace = errorData[1];
    resultPort.close();
    errorPort.close();
    Timeline.finishSync();
    completableFuture._errorCallback();
    completableFuture._completeCallback();
  });
  return completableFuture;
}