PHP通过插入mysql数据来实现多机互锁实例_PHP

WBOY
Release: 2016-05-31 19:28:21
Original
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本文实例讲述了PHP通过插入mysql数据来实现多机互锁的方法,分享给大家供大家参考。具体实现方法如下:

在执行流程之前可以加一般锁,shell枷锁函数如下,如果成功则会返回0,否则返回非0值:

代码如下:

function get_lock()
{
    local dataId="${1}"
    local dataDate="${2}"

    local sql="insert intot_trans_lock
    (dataId, dataDate) values('${dataId}', '${dataDate}');"
    echo ${sql} | ${DB_PUBLIC}

    return $?
}

在执行失败或者结束的时候释放锁

代码如下:

function free_lock()
{
    local dataId="${1}"
    local dataDate="${2}"
    local status="${3}"

    local sql="delete from t_trans_lock
    where dataId='${dataId}' and dataDate='${dataDate}';"
    echo ${sql} | ${DB_PUBLIC}
    if [ $? -ne 0 ]; then
        write_log ${dataId} "free lock failed"
    fi
    return ${status}
}

希望本文所述对大家的PHP+MySQL程序设计有所帮助。

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