on-call channel的意思|示意

The application then registers channels (file descriptors) and interested operations to the selector with a register call on the channel.

然后，应用程序用register调用向选择器注册通道(文件描述符)和感兴趣的操作。

Bindings, on the other hand, enable Web Services Gateway to call Service Providers and receive responses from the provider, which it then returns using the channel to the requestor.

另一方面，绑定使Web服务网关调用服务提供方，并接收提供方的响应，然后利用到请求方的通道，提供方进行返回。

To make the channel nonblocking, we call configureBlockingMethod(false) on the channel, as shown here

为了使通道成为非阻塞的，我们在通道上调用 configureBlockingMethod(false) ，如下所示