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这篇文章介绍的内容是关于php使用gearman进行任务分发 ,有着一定的参考价值,现在分享给大家,有需要的朋友可以参考一下" >这篇文章介绍的内容是关于php使用gearman进行任务分发 ,有着一定的参考价值,现在分享给大家,有需要的朋友可以参考一下
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php使用gearman进行任务分发

Apr 26, 2018 am 09:40 AM
gearman php distribution


这篇文章介绍的内容是关于php使用gearman进行任务分发 ,有着一定的参考价值,现在分享给大家,有需要的朋友可以参考一下



一、安装gearman

下载gearman源码包



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https://launchpad.net/gearmand/+download
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如: gearmand-1.1.12.tar.gz

下载php的gearman扩展包



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http://pecl.php.net/package/gearman
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如: gearman-1.1.2.tgz

安装gearman



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> yum install boost-devel gperf libevent-devel libuuid-devel
> tar xf gearmand-1.1.12.tar.gz
> cd gearmand-1.1.12
> ./configure
> make && make install
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安装gearman的php扩展(建议php版本不要过高,因为php7的gearman扩展目前还没有出来)



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> yum install autoconf
> tar xf gearman-1.1.2.tgz
> cd gearman-1.1.2
> /data/php56/bin/phpize
> ./configure --with-php-config=/data/php56/bin/php-config
> make && make install
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修改php.ini



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> vi /data/php56/lib/php.ini
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添加如下两项



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extension_dir=/data/php56/lib/php/extensions/no-debug-zts-20131226/
extension=gearman.so
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查看扩展



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> /data/php56/bin/php -m
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二、简单的使用gearman

gearman中请求的处理过程一般涉及三种角色:client->job->worker
其中client是请求的发起者
job是请求的调度者,用于把客户的请求分发到不同的worker上进行工作
worker是请求的处理者

比如这里我们要处理client向job发送一个请求,来计算两个数之和,job负责调度worker来具体实现计算两数之和。

首先我们编写client.php



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<?php
//创建一个客户端
$client = new GearmanClient();
//添加一个job服务
$client->addServer(&#39;127.0.0.1&#39;, 4730);
//doNormal是同步的,等待worker处理完成返回结果
//建议不要使用do()了
$ret = $client->doNormal(&#39;sum&#39;, serialize(array(10, 10)));
 
if($ret) {
    echo &#39;计算结果:&#39;, $ret, "\n";
}
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再编写worker.php



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<?php
//创建一个worker
$worker = new GearmanWorker();
//添加一个job服务
$worker->addServer(&#39;127.0.0.1&#39;, 4730);
//注册一个回调函数,用于业务处理
$worker->addFunction(&#39;sum&#39;, function($job) {
    //workload()获取客户端发送来的序列化数据
    $data = unserialize($job->workload());
 
    return $data[0] + $data[1];
});
 
//死循环
while(true) {
    //等待job提交的任务
    $ret = $worker->work();
    if ($worker->returnCode() != GEARMAN_SUCCESS) {
        break;
    }
}
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我们先启动gearmand服务



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> mkdir -p /usr/local/var/log
> gearmand -d
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运行worker文件



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> /data/php56/bin/php /data/worker.php
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再运行client文件



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> /data/php56/bin/php /data/client.php
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结果如下:

三、gearman异步的处理任务

这里我们client向job发送一个发送邮件的请求,不等待请求完成,继续向下执行。

client.php代码如下:



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<?php
//创建一个客户端
$client = new GearmanClient();
//添加一个job服务
$client->addServer(&#39;127.0.0.1&#39;, 4730);
//doBackground异步,返回提交任务的句柄
$ret = $client->doBackground(&#39;sendEmail&#39;, json_encode(array(
    &#39;email&#39; => &#39;test@qq.com&#39;,
    &#39;title&#39; => &#39;测试异步&#39;,
    &#39;body&#39; => &#39;异步执行好牛B的样子&#39;,
)));
 
//继续执行下面的代码
echo "我的内心毫无波动,甚至还想笑\n";
 
do {
    sleep(1);
 
    //获取任务句柄的状态
    //jobStatus返回的是一个数组
    //第一个,表示工作是否已经知道
    //第二个,工作是否在运行
    //第三和第四,分别对应完成百分比的分子与分母
    $status = $client->jobStatus($ret);
     
    echo "完成情况:{$status[2]}/{$status[3]}\n";
 
    if(!$status[1]) {
        break;
    }
} while(true);
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worker.php代码如下:



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<?php
//创建一个worker
$worker = new GearmanWorker();
//添加一个job服务
$worker->addServer(&#39;127.0.0.1&#39;, 4730);
//注册一个回调函数,用于业务处理
$worker->addFunction(&#39;sendEmail&#39;, function($job) {
    //workload()获取客户端发送来的序列化数据
    $data = json_decode($job->workload(), true);
    //模拟发送邮件所用时间
    sleep(6);
    echo "发送{$data[&#39;email&#39;]}邮件成功\n";
});
 
//死循环
//等待job提交的任务
while($worker->work());  
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结果如下:

四、gearman并行的执行多个任务

我们如何并行的计算两个数的累加和? 通过addTask添加多个任务到队列,然后进行并行计算。

client.php代码如下:



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<?php
//创建一个客户端
$client = new GearmanClient();
//添加一个job服务
$client->addServer(&#39;127.0.0.1&#39;, 4730);
//设置任务完成时的回调函数
$client->setCompleteCallback(function($task) {
    //获取由worker返回的数据
    echo $task->data(), "\n";
});
 
//计算1到500的累加和
//添加五个任务到队列
$client->addTask(&#39;sum&#39;, json_encode(array(1, 100)));
$client->addTask(&#39;sum&#39;, json_encode(array(100, 200)));
$client->addTask(&#39;sum&#39;, json_encode(array(200, 300)));
$client->addTask(&#39;sum&#39;, json_encode(array(300, 400)));
$client->addTask(&#39;sum&#39;, json_encode(array(400, 500)));
 
//运行队列中的任务,do系列不需要runTask()
$client->runTasks();
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worker.php代码如下:



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<?php
//创建一个worker
$worker = new GearmanWorker();
//添加一个job服务
$worker->addServer(&#39;127.0.0.1&#39;, 4730);
//注册一个回调函数,用于业务处理
$worker->addFunction(&#39;sum&#39;, function($job) {
    //workload()获取客户端发送来的序列化数据
    $data = json_decode($job->workload(), true);
    sleep(1);
    $sum = 0;
    for($ix = $data[0]; $ix < $data[1]; ++$ix) {
        $sum += $ix;
    }
    return $sum;
});
 
//死循环
//等待job提交的任务
while($worker->work());
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我们开启5个worker工作进程,当运行客户端请求时,5个计算任务几乎是同时返回结果。

结果如下:


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