前言

sql中的show full processlist是查看线程，实际就是查这个表

select * from information_schema.processlist where COMMAND = 'Sleep' and Time>30

然后在配上kill id，就能释放，为了以后方便寻找，我把他写成了接口，我通过shell脚本的curl 调用这个接口，就能实现轮询释放。

代码实现

controller层代码

 @GetMapping("kill")
    public RsJsonBean killProcess(@Param("key") String key) {
        SqlSession mybaiteSession = null;
        try {
            if (key.equals("#sdfada!")) {//密钥，当这个成立时，则会释放所有线程，腾出空间
                mybaiteSession =DBCPUtil.getMybaiteSession();
                infoMapper = mybaiteSession.getMapper(InfoMapper.class);
                List<HashMap> hashMaps = infoMapper.selectProcess();
                for (int i = 0; i < hashMaps.size(); i++) {
                    HashMap hashMap = hashMaps.get(i);
                    int id =Integer.parseInt(hashMap.get("ID").toString());
                    infoMapper.killProcess(id);
                }
                mybaiteSession.commit();
                return new RsJsonBean(1, "成功释放");
            }

            //密钥不匹配
            return new RsJsonBean(0, "释放失败:" + "密钥不匹配");

        } catch (Exception e) {
            return new RsJsonBean(0, "释放失败:" + e.getMessage());
        } finally {
            if (mybaiteSession != null) {
                mybaiteSession.close();
            }
        }
    }

mybaites代码,sql

//查询所有符合条件的线程
List<HashMap> selectProcess();
//释放某个线程
int killProcess(@Param("id") int id);

<select id="selectProcess" resultType="java.util.HashMap">
    select * from information_schema.processlist where COMMAND = 'Sleep' and Time>15
</select>

<delete id="killProcess">
    kill #{id}
</delete>

shell脚本

通过curl方式的特殊字符不能用。

curl -XGET http://127.0.0.1:8087/info/kill?"key=23aoTest"

-XGET代表get请求,crul中参数拿""标起来

#!/bin/bash
while true
do
echo "开始，请等待5秒"
        sleep 5s
        echo `curl -XGET http://127.0.0.1:8087/info/kill?"key=23aoTest"`
        echo `date`
        echo "-----"
done