Question

创建OtpNode实例时，这是什么类型的节点？它是像erl -sname xxx还是像elr -name xxx？

Answer 1

它的工作方式是“-sname”。至少根据以下例子。

TryOTP.java（故意导入导入）

public class TryOTP {
    public void start() {
        OtpNode node = null;

        try {
            node = new OtpNode("javambox@localhost", "zed"); // name, cookie
        } catch (IOException ex) {
            System.exit(-1);
        }

        System.out.println("Connected to epmd...");

        if (node.ping("shell@localhost", 2000)) {
            System.out.println("shell@localhost is up.");
        } else {
            System.out.println("shell@localhost is down");
        }

        OtpMbox mbox = node.createMbox("mbox");

        while (true) {

            OtpErlangObject o = null;
            try {
                o = mbox.receive();
            } catch (OtpErlangDecodeException ex) {
                System.out.println("Received message could not be decoded: " + ex);
                continue;
            } catch (OtpErlangExit ex) {
                System.out.println("Remote pid " + ex.pid() + " has terminated.");
                continue;
            }
            System.out.println("Received: " + o);
        }
    }

    public static void main(String[] args)
    {
        System.getProperties().setProperty("OtpConnection.trace", "3");
        new TryOTP().start();
    }

}

运行Erlang shell：

erl -sname shell@localhost -setcookie zed

(shell@localhost)1> net_adm:ping(javambox@localhost).
pong
(shell@localhost)2> {mbox, javambox@localhost} ! hello. 
hello

Answer 2

从Java代码中，您可以连接到以-name和-sname开头的Erlang节点。它只是在另一个方向上很棘手（我没有答案）。因此，如果您可以从Java端进行连接，那么问题就解决了。

Jinterface OtpNode初始化-name或-sname标志

2 个答案: