一、测试环境在Ubuntu kylin 14.04 64bit
已经安装Mysql、Redis、php、lib_mysqludf_json.so、Gearman。
点击这里查看测试数据库及表参考
本文也有些基本操作,在之前文章里有介绍。
1、安装
mysql-udf">安装gearman-mysql-udf
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apt-get install libgearman-dev wget https://launchpad.net/gearman-mysql-udf/trunk/0.6/+download/gearman-mysql-udf-0.6.tar.gz tar -xzf gearman-mysql-udf-0.6.tar.gz cd gearman-mysql-udf-0.6 ./configure --with-mysql=/usr/bin/mysql_config --libdir=/usr/lib/mysql/plugin/ make sudo make install |
注册UDF函数:
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CREATE FUNCTION gman_do_background RETURNS STRING SONAME 'libgearman_mysql_udf.so' ; CREATE FUNCTION gman_servers_set RETURNS STRING SONAME 'libgearman_mysql_udf.so' ; CREATE FUNCTION gman_do RETURNS STRING SONAME "libgearman_mysql_udf.so" ; CREATE FUNCTION gman_do_high RETURNS STRING SONAME "libgearman_mysql_udf.so" ; CREATE FUNCTION gman_do_low RETURNS STRING SONAME "libgearman_mysql_udf.so" ; CREATE FUNCTION gman_do_background RETURNS STRING SONAME "libgearman_mysql_udf.so" ; CREATE FUNCTION gman_do_high_background RETURNS STRING SONAME "libgearman_mysql_udf.so" ; CREATE FUNCTION gman_do_low_background RETURNS STRING SONAME "libgearman_mysql_udf.so" ; CREATE AGGREGATE FUNCTION gman_sum RETURNS INTEGER SONAME "libgearman_mysql_udf.so" ; CREATE FUNCTION gman_servers_set RETURNS STRING SONAME "libgearman_mysql_udf.so" ; |
指定Gearman服务器的信息:
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SELECT gman_servers_set( '127.0.0.1:4730' ); |
使用示例:
参照http://blog.csdn.net/xundh/article/details/46287681 建立一个reverse.php的worker
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<?php $worker= new GearmanWorker(); $worker->addServer(); $worker->addFunction( "reverse" , "my_reverse_function" ); while ($worker-> work ()); function my_reverse_function($job){ return strrev($job->workload()); } ?> |
输入命令php reverse.php运行。
到mysql里,输入:
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SELECT gman_do( "reverse" , 'abcdef' ) AS test FROM Users; ---FROM Users也可以不带。 |
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SELECT gman_do( "reverse" , password ) AS test FROM Users; |
可以看到输出结果,其中password列已经被reverse的worker处理,mysql这时充当client端:
还可以输入以下命令测试:
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SELECT gman_do_high( "reverse" , password ) AS test FROM Users; --高优先权 |
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SELECT gman_do_background( "reverse" , password ) AS test FROM Users; --后台低优先权,返回主机和作业号。 |
创建syncToRedis作业
停止前面的reverse worker,建立一个syncToRedis.php
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<?php $worker = new GearmanWorker(); $worker->addServer(); $worker->addFunction( 'syncToRedis' , 'syncToRedis' ); $redis = new Redis(); $redis-> connect ( '127.0.0.1' , 6379); echo( "begin:
" ); while($worker-> work ()); function syncToRedis($job) { global $redis; $workString = $job->workload(); $ work = json_decode($workString); echo( 'get value:' ); echo($workString); echo( "
" ); echo( 'json_decode:' ); var_dump($ work ); echo( "
" ); if(!isset($ work ->user_id)){ return false ; } $redis-> set ($ work ->user_id, $workString); } |
在mysql里测试一下:
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SELECT gman_do( "syncToRedis" , json_object(user_id as user_id, password as password )) AS test FROM Users; |
如果redis监控是打开的,可以看到redis已经收到了数据:
redis查询结果
2、建立触发器
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DELIMITER $$ CREATE TRIGGER datatoredis AFTER UPDATE ON Users FOR EACH ROW BEGIN SET @ret=gman_do_background( 'syncToRedis' , json_object(NEW.user_id as `user_id`, NEW.email as `email`,NEW.display_name as `display_name`,NEW. password as ` password `)); END $$ DELIMITER ; |
执行SQL语句测试:
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insert into Users values ( '8' , 'new' , '3' , 'hello' ); update Users set email= 'new8@qq.com' where user_id=8; |
正常使用时,可以把worker使用&设置为后台任务:
nohup php syncToReids.php &
学习时的痛苦是暂时的 未学到的痛苦是终生的