Question

如何设置Dart服务器以在即将到来的请求中使用所有可用内核（例如，通过使用多个隔离来提供请求）？

Answer 1

使用shared: true

的HttpServer.bind参数

示例：

    import 'dart:io';
    import 'dart:isolate';

    import 'package:shelf/shelf.dart' as shelf;
    import 'package:shelf/shelf_io.dart' as shelf_io;
    import 'package:args/args.dart' show ArgParser;

    main(List<String> args) {
      var parser = new ArgParser()
        ..addOption('address', abbr: 'a', defaultsTo: '0.0.0.0')
        ..addOption('port', abbr: 'p', defaultsTo: '9393')
        ..addOption('isolates', abbr: 'i', defaultsTo: '3');
      var arguments = parser.parse(args);

      var nbOfIsolates = int.parse(arguments['isolates']);
      for (int i = 1; i < nbOfIsolates; i++) {
        Isolate.spawn(_startShelfServer, [arguments['address'], int.parse(arguments['port'])]);
      }
      _startShelfServer([arguments['address'], int.parse(arguments['port'])]);
    }

    _startShelfServer(List args) async {
      String address = args[0];
      int port = args[1];

      var helloWorldHandler = (shelf.Request request) => new shelf.Response.ok("Hello World - from isolate ${Isolate.current.hashCode}");  
      var handler = const shelf.Pipeline()
          .addHandler(helloWorldHandler);
      var server = await HttpServer.bind(address, port, shared: true);
      await shelf_io.serveRequests(server, handler);
      print('Serving at http://${server.address.host}:${server.port} - isolate: ${Isolate.current.hashCode}');    
    }

如何使用多个隔离区来处理请求

1 个答案: