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The messaging and data conversion protocol between Java and DolphinDB server

There is a newer version: 3.00.2.2

package com.xxdb;

public class ServerExceptionUtils {
    public static boolean isNotLogin(String exMsg) {
        return exMsg.indexOf("") >= 0;
    }

    public static boolean isNotLeader(String exMsg) {
        if (exMsg == null)
            return false;
        return exMsg.indexOf("") >= 0;
    }

    public static boolean isDataNodeNotAvailable(String exMsg) {
        if (exMsg == null)
            return false;
        return exMsg.indexOf("") >= 0;
    }

    public static String newLeader(String exMsg) {
        return exMsg.substring(11);
    }
}