worker.send(message[, sendHandle[, options]][, callback])

• message <Object>

• sendHandle <Handle>

• options <Object> options 参数（如果存在）是用于参数化某些类型句柄的发送的对象。options 支持以下属性：

  ¥options <Object> The options argument, if present, is an object used to parameterize the sending of certain types of handles. options supports the following properties:

  • keepOpen <boolean> 当传入 net.Socket 实例时可以使用的值。当为 true 时，套接字在发送过程中保持打开状态。默认值：false。

    ¥keepOpen <boolean> A value that can be used when passing instances of net.Socket. When true, the socket is kept open in the sending process. Default: false.

• callback <Function>

• 返回：<boolean>

  ¥Returns: <boolean>

向工作进程或主进程发送消息，可选择使用句柄。

¥Send a message to a worker or primary, optionally with a handle.

在主进程中，这会向特定的工作进程发送消息。它与 ChildProcess.send() 相同。

¥In the primary, this sends a message to a specific worker. It is identical to ChildProcess.send().

在工作进程中，这会向主进程发送消息。它与 process.send() 相同。

¥In a worker, this sends a message to the primary. It is identical to process.send().

此示例将回显来自主进程的所有消息：

¥This example will echo back all messages from the primary:

if (cluster.isPrimary) {
  const worker = cluster.fork();
  worker.send('hi there');

} else if (cluster.isWorker) {
  process.on('message', (msg) => {
    process.send(msg);
  });
} 拷贝