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PHP下用Swoole實(shí)現(xiàn)Actor并發(fā)模型的方法

2024-05-05 00:09:35
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什么是Actor?

Actor對于PHPer來說,可能會(huì)比較陌生,寫過Java的同學(xué)會(huì)比較熟悉,Java一直都有線程的概念(雖然PHP有Pthread,但不普及),它是一種非共享內(nèi)存的并發(fā)模型,每個(gè)Actor內(nèi)的數(shù)據(jù)獨(dú)立存在,Actor之間通過消息傳遞的形式進(jìn)行交互調(diào)度,且Actor是一種高度抽象化的編程模型,非常適合于游戲、硬件行業(yè)。

Swoole協(xié)程與信箱

得益于Swoole4.x,我們可以基于Swoole的協(xié)程與Channel快速實(shí)現(xiàn)一個(gè)信箱模式調(diào)度。模擬代碼如下:

use Swoole/Coroutine/Channel;go(function (){  //創(chuàng)建十個(gè)信箱通道  $mailBoxes = [];  for ($i = 1;$i <= 10;$i++){    $mailBoxes[$i] = new Channel(16);  }  //模擬master 郵局調(diào)度,隨機(jī)像一個(gè)信箱投遞消息  go(function ()use($mailBoxes){    while (1){      /co::sleep(2);      $key = rand(1,10);      ($mailBoxes[$key])->push(time());    }  });  //模擬actor 實(shí)體消費(fèi)  for ($i = 1;$i <= 10;$i++){    go(function ()use($mailBoxes,$i){      while (1){        $msg = ($mailBoxes[$i])->pop();        echo "Actor {$i} recv msg : {$msg} /n";      }    });  }});

以上代碼執(zhí)行輸出:

php test.php 
Actor 8 recv msg : 1559622691 
Actor 10 recv msg : 1559622693 
Actor 1 recv msg : 1559622695 
Actor 5 recv msg : 1559622697 

協(xié)程通道每次在POP遇到無數(shù)據(jù)的時(shí)候,都會(huì)自動(dòng)讓出執(zhí)行權(quán)(具體可以去看Swoole協(xié)程調(diào)度)

Actor庫

基于上面的原理,我們實(shí)行了一個(gè)多進(jìn)程分布的協(xié)程Actor庫

composer require easyswoole/actor=2.x-dev

我們依賴dev庫進(jìn)行測試,生產(chǎn)可以自己依賴stable版本

進(jìn)程關(guān)系

Easyswoole的Actor模型中,存在兩組進(jìn)程,一組是proxy進(jìn)程,用來實(shí)現(xiàn)Actor對外服務(wù),一組是worker進(jìn)程,proxy進(jìn)程與worker進(jìn)程之間通過unixsock進(jìn)行通訊,而Actor實(shí)例就均勻的分布worker之中。

樣例代碼

比如在一個(gè)聊天室中,我們可以定義一個(gè)房間模型。

namespace EasySwoole/Actor/Test;use EasySwoole/Actor/AbstractActor;use EasySwoole/Actor/ActorConfig;class RoomActor extends AbstractActor{  public static function configure(ActorConfig $actorConfig)  {    $actorConfig->setActorName('Room');  }  public function onStart()  {    //每當(dāng)一個(gè)RoomActor實(shí)體被創(chuàng)建的時(shí)候,都會(huì)執(zhí)行該回調(diào)    var_dump('room actor '.$this->actorId().' start');  }  public function onMessage($msg)  {    //每當(dāng)一個(gè)RoomActor實(shí)體收到外部消息的時(shí)候,都會(huì)執(zhí)行該回調(diào)當(dāng)    var_dump('room actor '.$this->actorId().' onmessage: '.$msg);    return 'reply at '.time();  }  public function onExit($arg)  {     //每當(dāng)一個(gè)RoomActor實(shí)體退出的時(shí)候,都會(huì)執(zhí)行該回調(diào)    var_dump('room actor '.$this->actorId().' exit at arg: '.$arg);    return 'exit at '.time();  }  protected function onException(/Throwable $throwable)  {    //每當(dāng)一個(gè)RoomActor出現(xiàn)異常的時(shí)候,都會(huì)執(zhí)行該回調(diào)    var_dump($throwable->getMessage());  }}

在cli模式下創(chuàng)建一個(gè)Actor服務(wù)

use EasySwoole/Actor/Actor;use EasySwoole/Actor/Test/RoomActor;use EasySwoole/Actor/ProxyProcess;Actor::getInstance()->register(RoomActor::class);$list = Actor::getInstance()->generateProcess();foreach ($list['proxy'] as $proxy){  /** @var ProxyProcess $proxy */  $proxy->getProcess()->start();}foreach ($list['worker'] as $actors){  foreach ($actors as $actorProcess){    /** @var ProxyProcess $actorProcess */    $actorProcess->getProcess()->start();  }}while($ret = /Swoole/Process::wait()) {  echo "PID={$ret['pid']}/n";}

創(chuàng)建一個(gè)cli測試腳本

use EasySwoole/Actor/Actor;use EasySwoole/Actor/Test/RoomActor;Actor::getInstance()->register(RoomActor::class);go(function (){  $actorId = RoomActor::client()->create('create arg1');  var_dump($actorId);  /co::sleep(3);  var_dump(RoomActor::client()->send($actorId,'this is msg'));  /co::sleep(3);  var_dump(RoomActor::client()->exit($actorId,'this is exit arg'));  /co::sleep(3);  RoomActor::client()->create('create arg2');  /co::sleep(3);  RoomActor::client()->create('create arg3');  /co::sleep(3);  var_dump(RoomActor::client()->sendAll('sendAll msg'));  /co::sleep(3);  var_dump(RoomActor::client()->status());  /co::sleep(3);  var_dump(RoomActor::client()->exitAll('sendAll exit'));});

以上代碼執(zhí)行結(jié)果如下:

服務(wù)端

php test.php string(40) "room actor 00101000000000000000001 start"string(57) "room actor 00101000000000000000001 onmessage: this is msg"string(64) "room actor 00101000000000000000001 exit at arg: this is exit arg"string(40) "room actor 00101000000000000000002 start"string(40) "room actor 00103000000000000000001 start"string(57) "room actor 00101000000000000000002 onmessage: sendAll msg"string(57) "room actor 00103000000000000000001 onmessage: sendAll msg"string(60) "room actor 00101000000000000000002 exit at arg: sendAll exit"string(60) "room actor 00103000000000000000001 exit at arg: sendAll exit"

客戶端

php test2.php string(23) "00101000000000000000001"string(19) "reply at 1559623925"string(18) "exit at 1559623928"bool(true)array(3) { [1]=> int(1) [2]=> int(0) [3]=> int(1)}bool(true)

更多細(xì)節(jié)可以在EasySwoole項(xiàng)目官網(wǎng)得到文檔支持 http://easyswoole.com/

喜歡EasySwoole項(xiàng)目的,可以給個(gè)star https://github.com/easy-swoole/easyswoole

以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持VeVb武林網(wǎng)。


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