How to implement asynchronous task queue using php + swoole

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Suppose you want to send 100 emails, and the for loop is repeated 100 times, and the users will directly rebel. What a broken website!
But in reality, we probably have over 10,000 emails. How to deal with this delay problem?
The answer is to use asynchronous. Encapsulate the "send email" operation and execute it asynchronously 10,000 times in the background. In this case, after the user submits the web page, the time he waits is only the time to "push the email task request into the queue". And our background service will run where users can't see it.
In terms of implementing "asynchronous queue", some people use MySQL tables or redis to store emails to be sent, and then read the to-be-sent list regularly every minute and then process it. This is the scheduled asynchronous task queue. However, the currently submitted task will take one minute to be executed, which is still not fast in some application scenarios with high real-time requirements, such as sending text messages. As soon as the task is submitted, it will be executed immediately, and the user does not need to wait for the result to be returned.

#The following will discuss the solution of using PHP to extend swoole to realize real-time asynchronous task queue sending text messages.

Server

Step 1: Create a tcp server

Step 2: Set the relevant attributes of the server

Step 3: Set the relevant callback function processing task of the server

The specific code is as follows: tcp_server.php

<?php
class Server{
  private $serv;
  public function __construct(){

    $this->serv = new swoole_server("0.0.0.0",9501);
    $this->serv->set(
      array(  
            &#39;worker_num&#39; => 1,                //一般设置为服务器CPU数的1-4倍  
            &#39;daemonize&#39; => 1,                 //以守护进程执行  
            &#39;max_request&#39; => 10000,  
            &#39;dispatch_mode&#39; => 2,  
            &#39;task_worker_num&#39; => 8,           //task进程的数量  
            "task_ipc_mode " => 3,            //使用消息队列通信，并设置为争抢模式  
            "log_file" => "log/taskqueueu.log",
        )
    );
    $this->serv->on(&#39;Receive&#39;,array($this,&#39;onReceive&#39;));
    $this->serv->on(&#39;Task&#39;,array($this,&#39;onTask&#39;));
    $this->serv->on(&#39;Finish&#39;,array($this,&#39;onFinish&#39;));   
    $this->serv->start();

  }
  public function onReceive(swoole_server $serv, $fd, $from_id, $data){
    $serv->task($data);
  }
  public function onTask($serv, $task_id, $from_id, $data){
    $data = json_decode($data,true);
    if(!empty($data)){
      return $this->sendsms($data[&#39;mobile&#39;],$data[&#39;message&#39;]);   
    }
  }
  public function onFinish($serv, $task_id, $data){
      echo "Task {$task_id} finish\n";
  }
  public function sendsms($mobile,$text)
	{
		$timestamp = date("Y-m-d H-i-s");
		$pid = "888888888";
		$send_sign = md5($pid.$timestamp."abcdefghijklmnopqrstuvwxyz");
		$post_data = array();  
		$post_data[&#39;partner_id&#39;] = $pid;  
		$post_data[&#39;timestamp&#39;] =$timestamp;  
		$post_data[&#39;mobile&#39;] = $mobile;  
		$post_data[&#39;message&#39;] = $text;  
		$post_data[&#39;sign&#39;] = $send_sign;  
		$url=&#39;http://182.92.149.100/sendsms&#39;;  
		$o="";  
		foreach ($post_data as $k=>$v)  
		{  
			$o.= "$k=".urlencode($v)."&";  
		}  
		$post_data=substr($o,0,-1);  
		$ch = curl_init();  
		curl_setopt($ch, CURLOPT_POST, 1);  
		curl_setopt($ch, CURLOPT_HEADER, 0);  
		curl_setopt($ch, CURLOPT_URL,$url);  

		//为了支持cookie  
		//curl_setopt($ch, CURLOPT_COOKIEJAR, &#39;cookie.txt&#39;);  
		curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);  
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		$result = curl_exec($ch);  
		if(strpos($result,"success")!==false)
		{
			$outstr=1;
		}
		else
		{
			$outstr=502;
		}
		return $outstr;
	
	}
}
$server = new Server();
?>

Client

After starting the back-end service, the client first creates a tcp client server, then connects to the tcp back-end server, and Send data to the backend tcp server, the specific code is as follows: client.php

<?php
class Client{
  public $client;
  public function __construct(){
    $this->client= new swoole_client(SWOOLE_SOCK_TCP);//默认同步tcp客户端，添加参数SWOOLE_SOCK_ASYNC为异步
  }
  public function connect(){
    if(!$this->client->connect(&#39;127.0.0.1&#39;,9501,1)){
      throw new Exception(sprintf(&#39;Swoole Error: %s&#39;, $this->client->errCode));
    }
  }
  public function send($data){
    if($this->client->isConnected()){
      $data = json_encode($data);
      //print $data;  
      if($this->client->send($data)){
         return 1;    
      }else{
        throw new Exception(sprintf(&#39;Swoole Error: %s&#39;, $this->client->errCode));
      }
    }else{
      throw new Exception(&#39;Swoole Server does not connected.&#39;);  
    }

  }
  public function close(){
    $this->client->close();
  }
}
$client= new Client();
$client->connect();
$data=array(
  &#39;mobile&#39;=>&#39;18511487955&#39;,
  &#39;message&#39;=>&#39;you mobile 18511487955&#39;
);
if($client->send($data)){
  echo &#39;succ&#39;;
}else{
  echo &#39;fail&#39;;
}
?>

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Two processing of asynchronous task queue Method

PHP uses swoole to implement real-time asynchronous task queue

spring boot-use Keyspace Notifications of redis implements scheduled task queue

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