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-devwget https://launchpad.net/gearman-mysql-udf/trunk/0.6/+download/gearman-mysql-udf-0.6.tar.gztar -xzf gearman-mysql-udf-0.6.tar.gzcd gearman-mysql-udf-0.6./configure --with-mysql=/usr/bin/mysql_config --libdir=/usr/lib/mysql/plugin/
makesudo 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";
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指定Gearman服务器的信息：
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SELECT gman_servers_set('127.0.0.1:4730');
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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;
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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。
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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:\n");
while($worker->work());
function syncToRedis($job)
{ global $redis;
$workString = $job->workload();
$work = json_decode($workString);
echo('get value:');
echo($workString);
echo("\n");
echo('json_decode:');
var_dump($work);
echo("\n");
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;
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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;
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正常使用时，可以把worker使用&设置为后台任务：
nohup php syncToReids.php &