StartManagementAgent.java 文件源码

private static void tryConnect(int port, boolean shouldSucceed) throws Exception {
    String jmxUrlStr =
        String.format(
            "service:jmx:rmi:///jndi/rmi://localhost:%d/jmxrmi",
            port);
    JMXServiceURL url = new JMXServiceURL(jmxUrlStr);
    HashMap<String, ?> env = new HashMap<>();

    boolean succeeded;
    try {
        JMXConnector c = JMXConnectorFactory.connect(url, env);
        c.getMBeanServerConnection();
        succeeded = true;
    } catch(Exception ex) {
        succeeded = false;
    }
    if (succeeded && !shouldSucceed) {
        throw new Exception("Could connect to agent, but should not have been possible");
    }
    if (!succeeded && shouldSucceed) {
        throw new Exception("Could not connect to agent");
    }
}