Question

我目前正在使用隔离区将查询并行发送到数据库服务器。我有一个连接器对象来构建与数据库的连接，我想在所有隔离器中共享它，所以我不必为每个隔离器创建单独的连接。

到目前为止，我似乎只能在隔离区之间共享特殊的可序列化对象。我使用发送和接收端口进行消息传递。对于其他对象（例如我的connector-object），dart-vm会产生错误：

Illegal argument(s): Illegal argument in isolate message : (object extends NativeWrapper)

您知道在多个隔离区之间共享通用对象实例的任何方法吗？或者我是否必须为每个隔离区创建一个单独的实例？

谢谢！

佩德罗

Answer 1

来自SendPort.send方法代码doc

   * In the special circumstances when two isolates share the same code and are
   * running in the same process (e.g. isolates created via [Isolate.spawn]), it
   * is also possible to send object instances (which would be copied in the
   * process). This is currently only supported by the dartvm.  For now, the
   * dart2js compiler only supports the restricted messages described above.

我认为也不支持作为原生对象包装的对象目前似乎唯一的方法是在每个隔离中创建一个新连接。

这些价值总是在工作

   * The content of [message] can be: primitive values (null, num, bool, double,
   * String), instances of [SendPort], and lists and maps whose elements are any
   * of these. List and maps are also allowed to be cyclic.

Dart隔离访问共享对象实例

1 个答案: