mysql表数据发生变化时，主动通知业务系统(mysql-udf-http)

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/FengHongSeXiaoXiang/article/details/80336900

mysql表数据发生变化时，主动通知业务系统(mysql-udf-http)

mysql-udf-http 是一款简单的MySQL用户自定义函数，具有http_get()、http_post()、http_put()、http_delete()四个函数，可以在MySQL数据库中利用HTTP协议进行REST相关操作，它的安装方式如下：

tar zxvf mysql-udf-http-1.0.tar.gz
cd mysql-udf-http-1.0/
./configure --prefix=/usr/local/mysql --with-mysql=/usr/local/mysql/bin/mysql_config
make && make install

如果提示缺少libcurl，就安装curl

yum install curl*

正常的情况mysql-udf-http.so等文件将安装至/usr/local/mysql/lib/plugin下，不知什么原因我的装在了/usr/local/mysql/lib/mysql/plugin下，于是加个软链

ln -s /usr/local/mysql/lib/mysql/plugin/mysql-udf-http.so /usr/local/mysql/lib/plugin/mysql-udf-http.so

安装成功后，进到mysql控制台，注册相关函数

create function http_get returns string soname 'mysql-udf-http.so';
create function http_post returns string soname 'mysql-udf-http.so';
create function http_put returns string soname 'mysql-udf-http.so';
create function http_delete returns string soname 'mysql-udf-http.so'; 

然后在业务表中加入更新操作的触发器

DELIMITER |  
DROP TRIGGER IF EXISTS test_update;  
CREATE TRIGGER test_update  
AFTER UPDATE ON test  
FOR EACH ROW BEGIN  
    SET @tt_re = (SELECT http_get(CONCAT('http://192.168.0.1:8080/my.do?id=', OLD.id)));  
END |  
DELIMITER ;

经测试，当商品表中的数据有更新时，mysql会发送get请求至业务系统。

INSERT 触发器

DELIMITER |  
DROP TRIGGER IF EXISTS test_insert;  
CREATE TRIGGER test_insert  
AFTER INSERT ON test
FOR EACH ROW BEGIN  
    SET @tt_re = (SELECT http_get(CONCAT('http://192.168.0.1:8080/my.do?id=', OLD.id))); 
END |  
DELIMITER ;

DELETE 触发器

DELIMITER |  
DROP TRIGGER IF EXISTS test_delete;  
CREATE TRIGGER test_delete  
AFTER DELETE ON test  
FOR EACH ROW BEGIN  
    SET @tt_re = (SELECT http_get(CONCAT('http://192.168.0.1:8080/my.do?id=', OLD.id)));  
END |  
DELIMITER ;