详解PHP swoole process的使用方法

引入背景：假如我们每天有10000个订单生成，需要同步到仓储系统中去，以前做法是开启一个crontab去跑这些任务，但是发现总有感觉同步效率低，间隔时间都是分钟级别的。

解决方案测试：我们将同步订单的任务表添加一个hash作为key，作为分发条件，因为mysql中select如果做mod函数是用不到索引的，所以我们自己做随机hash，但是务必不需要范围太大，以免服务器资源不够，方法是根据hashkey投放到不同的进程中进行同步，测试代码如下

<?php/** * Created by PhpStorm. * User: xujun * Date: 2017/8/26 * Time: 9:37 *///假定需要处理的数据如下class Process{  public $mpid=0;  public $max_precess=5;  //代替从数据库中读取的内容  public $task = [    ['uid'=>1,'uname'=>'bot','hash'=>1,'handle'=>'test'],    ['uid'=>2,'uname'=>'bot1','hash'=>2,'handle'=>'test'],    ['uid'=>3,'uname'=>'bot2','hash'=>3,'handle'=>'test'],    ['uid'=>4,'uname'=>'bot3','hash'=>4,'handle'=>'test'],    ['uid'=>2,'uname'=>'bot4','hash'=>2,'handle'=>'test'],    ['uid'=>3,'uname'=>'bot5','hash'=>3,'handle'=>'test'],    ['uid'=>4,'uname'=>'bot6','hash'=>1,'handle'=>'test'],  ];  public $works = [];  public $swoole_table = NULL;  //public $new_index=0;  function test($index,$task){    print_r("[".date('Y-m-d H:i:s')."]".'work-index:'.$index.'处理'.$task['uname'].'完成'.PHP_EOL);  }  public function __construct(){    try {      $this->swoole_table = new swoole_table(1024);      $this->swoole_table->column('index', swoole_table::TYPE_INT);//用于父子进程间数据交换      $this->swoole_table->create();      swoole_set_process_name(sprintf('php-ps:%s', 'master'));      $this->mpid = posix_getpid();      $this->run();      $this->processWait();    }catch (/Exception $e){      die('ALL ERROR: '.$e->getMessage());    }  }  public function run(){    for ($i=0; $i < $this->max_precess; $i++) {      $this->CreateProcess();    }  }  private function getTask($index){    $_return = [];    foreach ($this->task as $v){      if($v['hash']==$index){        $_return[] = $v;      }    }    return $_return;  }  public function CreateProcess($index=null){    if(is_null($index)){//如果没有指定了索引，新建的子进程，开启计数      $index=$this->swoole_table->get('index');      if($index === false){        $index = 0;      }else{        $index = $index['index']+1;      }      print_r($index);    }    $this->swoole_table->set('index',array('index'=>$index));    $process = new swoole_process(function(swoole_process $worker)use($index){      swoole_set_process_name(sprintf('php-ps:%s',$index));      $task = $this->getTask($index);      foreach ($task as $v){        call_user_func_array(array($this,$v['handle']),array($index,$v));      }      sleep(20);    }, false, false);    $pid=$process->start();    $this->works[$index]=$pid;    return $pid;  }  public function rebootProcess($ret){    $pid=$ret['pid'];    $index=array_search($pid, $this->works);    if($index!==false){      $index=intval($index);      $new_pid=$this->CreateProcess($index);      echo "rebootProcess: {$index}={$new_pid} Done/n";      return;    }    throw new /Exception('rebootProcess Error: no pid');  }  public function processWait(){    while(1) {      if(count($this->works)){        $ret = swoole_process::wait();        if ($ret) {          $this->rebootProcess($ret);        }      }else{        break;      }    }  }}$process = new Process();