How to use swoole task

# Application of Swoole Task.

Swoole Asynchronous Task mainly implements the execution of calling asynchronous tasks.                   (Recommended learning: swoole video tutorial)

Commonly used scenarios: asynchronous payment processing, asynchronous order processing, asynchronous log processing, asynchronous sending of emails/SMS messages, etc.

The implementation of Swoole is that the worker process handles the data request and is assigned to the task process for execution.

Official introduction:

task The bottom layer uses Unix Socket pipe communication, which is full memory and has no IO consumption. The read and write performance of a single process can reach 1 million/s. Different processes use different pipelines to communicate, which can maximize the use of multiple cores.

Local version: PHP 7.2.6, Swoole 4.3.1.

Without further ado, let’s look at the renderings first:

Code

server.php

class Server
{
    private $serv;

    public function __construct() {
        $this->serv = new swoole_server('0.0.0.0', 9501);
        $this->serv->set([
            'worker_num'      => 2, //开启2个worker进程
            'max_request'     => 4, //每个worker进程 max_request设置为4次
            'task_worker_num' => 4, //开启4个task进程
            'dispatch_mode'   => 2, //数据包分发策略 - 固定模式
        ]);

        $this->serv->on('Start', [$this, 'onStart']);
        $this->serv->on('Connect', [$this, 'onConnect']);
        $this->serv->on("Receive", [$this, 'onReceive']);
        $this->serv->on("Close", [$this, 'onClose']);
        $this->serv->on("Task", [$this, 'onTask']);
        $this->serv->on("Finish", [$this, 'onFinish']);

        $this->serv->start();
    }

    public function onStart($serv) {
        echo "#### onStart ####".PHP_EOL;
        echo "SWOOLE ".SWOOLE_VERSION . " 服务已启动".PHP_EOL;
        echo "master_pid: {$serv->master_pid}".PHP_EOL;
        echo "manager_pid: {$serv->manager_pid}".PHP_EOL;
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onConnect($serv, $fd) {
        echo "#### onConnect ####".PHP_EOL;
        echo "客户端:".$fd." 已连接".PHP_EOL;
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onReceive($serv, $fd, $from_id, $data) {
        echo "#### onReceive ####".PHP_EOL;
        echo "worker_pid: {$serv->worker_pid}".PHP_EOL;
        echo "客户端:{$fd} 发来的Email:{$data}".PHP_EOL;
        $param = [
            'fd'    => $fd,
            'email' => $data
        ];
        $rs = $serv->task(json_encode($param));
        if ($rs === false) {
            echo "任务分配失败 Task ".$rs.PHP_EOL;
        } else {
            echo "任务分配成功 Task ".$rs.PHP_EOL;
        }
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onTask($serv, $task_id, $from_id, $data) {
        echo "#### onTask ####".PHP_EOL;
        echo "#{$serv->worker_id} onTask: [PID={$serv->worker_pid}]: task_id={$task_id}".PHP_EOL;

        //业务代码
        for($i = 1 ; $i <= 5 ; $i ++ ) {
            sleep(2);
            echo "Task {$task_id} 已完成了 {$i}/5 的任务".PHP_EOL;
        }

        $data_arr = json_decode($data, true);
        $serv->send($data_arr[&#39;fd&#39;] , &#39;Email:&#39;.$data_arr[&#39;email&#39;].&#39;,发送成功&#39;);
        $serv->finish($data);
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onFinish($serv,$task_id, $data) {
        echo "#### onFinish ####".PHP_EOL;
        echo "Task {$task_id} 已完成".PHP_EOL;
        echo "########".PHP_EOL.PHP_EOL;
    }

    public function onClose($serv, $fd) {
        echo "Client Close.".PHP_EOL;
    }
}

$server = new Server();

client.php

<?php
class Client
{
    private $client;
    public function __construct() {
        $this->client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);
        $this->client->on(&#39;Connect&#39;, [$this, &#39;onConnect&#39;]);
        $this->client->on(&#39;Receive&#39;, [$this, &#39;onReceive&#39;]);
        $this->client->on(&#39;Close&#39;, [$this, &#39;onClose&#39;]);
        $this->client->on(&#39;Error&#39;, [$this, &#39;onError&#39;]);
    }
    public function connect() {
        if(!$fp = $this->client->connect("127.0.0.1", 9501 , 1)) {
            echo "Error: {$fp->errMsg}[{$fp->errCode}]".PHP_EOL;
            return;
        }
    }
    public function onConnect($cli) {
        fwrite(STDOUT, "输入Email:");
        swoole_event_add(STDIN, function() {
            fwrite(STDOUT, "输入Email:");
            $msg = trim(fgets(STDIN));
            $this->send($msg);
        });
    }
    public function onReceive($cli, $data) {
        echo PHP_EOL."Received: ".$data.PHP_EOL;
    }
    public function send($data) {
        $this->client->send($data);
    }
    public function onClose($cli) {
        echo "Client close connection".PHP_EOL;
    }
    public function onError() {
    }
}
$client = new Client();
$client->connect();

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