monitor_set(){
    local jqcmd="$1"
    local file="$2"
    local json=$(cat "${file}"|jq "${jqcmd}" -c)
    echo "${json}" > "${file}" # centos下禁止cat和>同时执行，在ubuntu下会导致文件变空。故拆成两句，避免输入输出流冲突
}


monitor_get(){
    local jqcmd="$1"
    local file="$2"
    cat "${file}"|jq "${jqcmd}" -c
}




# 太复杂了，弃用！上面的get和set够用
# moniterdb set "path.to.leaf" "value"
# moniterdb get "path.to.leaf"
# moniterdb all
# moniterdb clear
# moniterdb init "...json..."
moniterdb(){
    local moniterFile=''
    while getopts "f:s:" optname; do
        case "$optname" in
            f)
                moniterFile="${OPTARG}"
                ;;
            *)
                echo 'error arg option: -${optname}.'
                return
                ;;
        esac
    done

    local action=''
    case $1 in 
        init)
            ;;
        set)
            ;;
        get)
            ;;
        all)
            ;;
        clear)
            ;;
        *)
            echo "error monitordb action $1"
            return
            ;;
    esac
}