think-swoole的简单使用

[官网文档thinkphp6文档](https://www.kancloud.cn/manual/thinkphp6_0/1037479 "网文档thinkphp6文档")
[swoole文档](https://wiki.swoole.com/#/ "swoole文档")

#### 安装
````
composer require topthink/think-swoole
````
#### 命令行
````
php think swoole [start|stop|reload|restart]
````
#### 服务启动

当你在命令行php think swoole下执行完成之后就会启动一个HTTP Server，可以直接访问当前的应用
````
'server'     => [
    'host'      => env('SWOOLE_HOST', '0.0.0.0'), // 监听地址
    'port'      => env('SWOOLE_PORT', 9501), // 监听端口
    'mode'      => SWOOLE_PROCESS, // 运行模式 默认为SWOOLE_PROCESS
    'sock_type' => SWOOLE_SOCK_TCP, // sock type 默认为SWOOLE_SOCK_TCP
    'options'   => [
        // 服务启动后，进程ID存放文件
        'pid_file'              => runtime_path() . 'swoole.pid',
        // swoole 的日志文件
        'log_file'              => runtime_path() . 'swoole.log',
        // 守护进程模式设置 true 后台运行
        'daemonize'             => false,
        // 设置启动的reactor线程数
        'reactor_num'           => swoole_cpu_num(),
        // 设置启动的worker进程数
        'worker_num'            => swoole_cpu_num(),
        //配置Task进程的数量
        'task_worker_num'       => swoole_cpu_num(),
        //开启静态文件请求处理，需配合document_root
        'enable_static_handler' => true,
        //静态文件根目录
        'document_root'         => root_path('public'),
        // 设置最大数据包尺寸，单位字节
        'package_max_length'    => 20 * 1024 * 1024,
        //配置发送输出缓冲区内存尺寸
        'buffer_output_size'    => 10 * 1024 * 1024,
        //设置客户端连接最大允许占用的内存数量
        'socket_buffer_size'    => 128 * 1024 * 1024,
    ],
],
````
#### 热更新

swoole服务器运行过程中php文件是常驻内存运行，这样就可以避免重复的读取磁盘，重复的解释编译php，以便达到最高的性能，所以修改代码需要重启服务think-swoole扩展提供热更新功能，在检测相关文件有更新会自动重启，不在需要手动完成重启，方便开发调试生产环境下不建议开始文件监控，性能损耗，正常情况下你所修改的文件需要确认无误才能进行更新部署

.env里面设置APP_DEBUG = true会默认开启热更新
````
'hot_update' => [
    'enable'  => env('APP_DEBUG', false),
    'name'    => ['*.php'],
    'include' => [app_path()],
    'exclude' => [],
],
````
参数说明参数说明enable是否开启热更新name监听哪些类型的文件变动include监听哪些目录下的文件变动exclude排除目录

#### websocket

先来一个官方的例子
````
$server = new Swoole\WebSocket\Server("0.0.0.0", 9501);
$server->on('open', function (Swoole\WebSocket\Server $server, $request) {
    echo "server: handshake success with fd{$request->fd}\n";
});
$server->on('message', function (Swoole\WebSocket\Server $server, $frame) {
    echo "receive from {$frame->fd}:{$frame->data}\n";
    $server->push($frame->fd, "this is server");
});
$server->on('close', function ($ser, $fd) {
    echo "client {$fd} closed\n";
});
$server->start();
````
开启think-swoole的websocket功能
````
\config\swoole.php'websocket'  => [
    'enable'        => true,
],
````
创建三个事件
````
php think make:listener SwWsConnect
php think make:listener SwWsClose
php think make:listener SwWsMessage
````
然后将这三个事件写到到事件监听中，分别有以下2中文件可以修改方式，注意二选一thinkphp6自带的事件绑定
````
app\event.php'listen'    => [
        ........
        // 监听链接
        'swoole.websocket.Connect' => [
            \app\listener\SwWsConnect::class
        ],
        //关闭连接
        'swoole.websocket.Close' => [
            \app\listener\SwWsClose::class
        ],
        //发送消息场景
        'swoole.websocket.Message' => [
            \app\listener\SwWsMessage::class
        ]
    ],think-swoole事件绑定config\swoole.php'listen'        => [
    'connect'=>\app\listener\SwWsConnect::class,
    'close'=>\app\listener\SwWsClose::class,
    'message'=> \app\listener\SwWsMessage::class
],
````
怎么选择是保存在config\swoole.php还是app\event.php配置中呢？

首先我们 我们确定一下我们这个项目中存在有几个实时通讯，
如果只是存在一个实时通讯 个人建议

保存在config\swoole.php如果是存在多个实时通讯，就保存在app\event.phpkey值 
必须是swoole.websocket.事件名称 
例如 swoole.websocket.Message开始写事件中中方法连接事件

app\listener\SwWsConnect.php
````
public function handle($event, \think\swoole\websocket $ws)
{
    // 获取当前发送者的fd
    $fd = $ws->getSender();
    echo "server: handshake success with fd{$fd}\n";
}
````
关闭事件
app\listener\SwWsClose.php
````
public function handle($event, \think\swoole\websocket $ws)
{
    $fd = $ws->getSender();
    echo "client {$fd} closed\n";
}
````
message事件app\listener\SwWsMessage.php
````
public function handle($event, \think\swoole\websocket $ws)
{
    $fd = $ws->getSender();
    $data = json_encode($event);
    echo "receive from {$fd}:{$data}\n";
    $ws->emit("this is server", $fd);
}
````
启动
````
php think swoole
````
进行测试think-swoole中的websocket方法总结//给自己发消息
````
$ws->emit("this is server", $ws->getSender());
//给指定一个fd发消息
$ws->to($to)->emit("messagecallback",$data);
//给指定多个人发消息
$ws->to([1,2,3])->emit("messagecallback",$data);
//发送给所有的(不包含自己)
$ws->broadcast()->emit("messagecallback",$data);
//模拟formfd 给tofd 发送消息
$ws->setSender($formfd)->to($tofd)->emit("messagecallback",$data);
````
注意：在多个实时通讯场景下使用 emit第一个参数传入 传入 事件名称callback

例如 messagecallback如果你发现你think-swoole中有些没有swoole中的方法可以这么干
````
$sw = app('swoole.server');
$sw = app("think\swoole\Manager")->getServer();
//以上二选一

$es = $sw->isEstablished($fd); //检查连接是否为有效的WebSocket客户端连接
var_dump($es);
````
#### 聊天室room实现

前端文件参考 html\room.html 或 html\room-socket-io.html
````
php think make:listener SwRoomJoin
php think make:listener SwRoomLeave
php think make:listener SwRoomMessage
````
事件绑定
 加入房间
````
'swoole.websocket.RoomJoin' => [
    \app\listener\SwRoomJoin::class
],
// 离开房间
'swoole.websocket.Roomleave' => [
    \app\listener\SwRoomLeave::class
],
// 在房间发消息
'swoole.websocket.RoomMessage' => [
    \app\listener\SwRoomMessage::class
]
````
加入房间逻辑
````
public function handle($event, \think\swoole\websocket $ws, \think\swoole\websocket\room $room)
{
    $fd = $ws->getSender();
    //客户端假如定的room
    $roomid = $event['room'];
    //获取指定房间下有哪些客户端
    $roomfds = $room->getClients($roomid);
    // 判断这个房间有没有自己 如果有自己就不需要再次发送通知
    if (in_array($fd, $roomfds)) {
        $ws->to($roomfds)->emit("roomjoincallback", "房间{$roomid}已加入");
        return;
    }
    //加入房间
    $ws->join($roomid);
    $ws->to($roomfds)->emit("roomjoincallback", "{$fd}加入房间{$roomid}成功");
}
````
离开房间逻辑
````
public function handle($event, \think\swoole\websocket $ws, \think\swoole\websocket\Room $room)
{
    $roomid = $event['room'];
    $fd = $ws->getSender();
    $roomfds = $room->getClients($roomid);
    if (!in_array($fd, $roomfds)) {
        $ws->emit("roomleavecallback", "{$fd}不在{$roomid}房间内，怎么离开~");
        return;
    }
    //离开房间
    $ws->leave($roomid);
    //获取当前客户端加入了哪些客户端
    $rooms = $room->getRooms($fd);
    $ws->to($roomfds)->emit("roomleavecallback", "{$fd}已离开了~~");
}
````
在房间发布聊天逻辑
````
public function handle($event, \think\swoole\websocket $ws, \think\swoole\websocket\room $room)
    {
        //
        $roomid = $event['room'];
        $text = $event['text'];
        $fd = $ws->getSender();
        $roomfds = $room->getClients($roomid);
        if (!in_array($fd, $roomfds)) {
            $ws->emit("roommessagecallback", "{$fd}不在{$roomid}房间内，无法进入发布聊天~");
            return;
        }
        $ws->to($roomfds)->emit("roommessagecallback",  $text);
    }
````
#### 事件订阅
````
	php think make:listener SwSubscribeapplistenerSwSubscribe.php
````
````
<?php
declare (strict_types = 1);

namespace app\listener;

class SwSubscribe
{
    protected $ws = null;

// public function __construct()
    // {
    //     $this->ws = app('think\swoole\Websocket');
    // }

public function __construct(\think\Container $c)
    {
        $this->ws = $c->make(\think\swoole\Websocket::class);
    }
    
    public function onConnect()
    {
        $fd = $this->ws->getSender();
        echo "server: handshake success with fd{$fd}\n";
    }
    public function onClose()
    {
        $fd = $this->ws->getSender();
        echo "client {$fd} closed\n";
    }
    public function onMessage($event)
    {
        $fd = $this->ws->getSender();
        var_dump($event);
        echo "server: handshake success with fd{$fd}\n";
        $this->ws->emit("this is server", $fd);
    }
}
````
有点类似 将原生的swoole代码改成面向对象代码，生效方法 config\swoole.php中在subscribe 加入
````
\app\listener\SwSubscribe::class'subscribe'     => [     \app\listener\SwSubscribe::class ],
````
在app\event.php文件中的 swoole.websocket.Connect 相当于 app\listener\SwSubscribe.php文件中的onConnect函数。如果同时存在的存在的话，就会向客户端发送2次以上的消息

#### Task任务投递
生成事件
````
php think make:listener SwSendEmailTask
````
编写发送邮件方法
````
app\listener\SwSendEmailTask.phppublic function handle($event)
{
    var_dump($event);
    //
    echo "开发发送邮件".time();
    sleep(3);
    echo "结束发送邮件".time();
}
//注册事件
app\event.php'swoole.task'=>[
    \app\listener\SwSendEmailTask::class
],
//在控制器中投递任务
public function doRegister()
{
    $server = app('swoole.server');
    $server->task(\app\listener\SwSendEmailTask::class);
    return "注册成功";
}

public function doRegister(\think\swoole\Manager $manager)
{
    $server = $manager->getServer();
    $server->task(\app\listener\SwSendEmailTask::class);
    return "注册成功";
}
public function doRegister(\Swoole\Server $server)
{
    $server->task(\app\listener\SwSendEmailTask::class);
    return "注册成功";
}
````
三种获取\Swoole\Server,任意选其一在swoole中还有一个事件叫finish，它的作用就是把异步任务的结果返回，在think-swool是这么处理的定义一个发送邮件异步任务处理结果的事件
````
php think make:listener SwSendEmailFinish
````
````
///注册事件
app\event.php'swoole.finish'=>[
    \app\listener\SwSendEmailFinish::class
],在task任务中调用public function handle($event)
{
    var_dump($event);
    //
    echo "开发发送邮件".time();
    sleep(3);
    echo "结束发送邮件".time();
    $event->finish(\app\listener\SwSendEmailFinish::class);
}
````
#### 高性能共享内存 Table
[链接先定结构在进行操作数据](https://link.zhihu.com/?target=https%3A//wiki.swoole.com/%23/start/start_task "Tableh链接先定结构在进行操作数据")（原生swoole操作）
````
$table = new Swoole\Table(1024);
//创建表
$table->column("id", Swoole\Table::TYPE_INT);
$table->column("name", Swoole\Table::TYPE_STRING);
$table->column("money", Swoole\Table::TYPE_FLOAT);
$table->create();
//添加数据
$table->set("zq", [
    'id' => 1,
    'name' => "zhiqiang",
    'money' => 100,
]);
//获取一行数据
$table->get("zq");
// 修改数据
// 字段递增
$table->incr("zq","money",2);
//递减
$table->decr("zq","money",2);
// 返回 table 中存在的条目数。
$table->count();
//遍历table中的数据
foreach($table as $item){
    var_dump($item);
}
````
##### think-swoole中的操作先对table表结构进行初始化config\swoole.php\
````
'tables'     => [
        'user'=>[
            'size'=>1024,
            'columns'=>[
                [
                    'name'=>'id',
                    'type'=>\Swoole\Table::TYPE_INT
                ],
                [
                    'name'=>'name',
                    'type'=>\Swoole\Table::TYPE_STRING,
                    'size'=>32
                ],
                [
                    'name'=>'money',
                    'type'=>\Swoole\Table::TYPE_FLOAT
                ],

],
        ],
    ],
````
##### 操作数据
````
	$table =  app('swoole.table.user');
	$table->set("zq", [
		'id' => 1,
		'name' => "zhiqiang",
		'money' => 100
	]);
//获取一行数据
$table->get("zq");
// 修改数据
// 字段递增
$table->incr("zq", "money", 2);
//递减
$table->decr("zq", "money", 2);
// 返回 table 中存在的条目数。
$table->count();
//遍历table中的数据
foreach ($table as $item) {
var_dump($item);
}
// 检查 table 中是否存在某一个 key。
$table->exist('zq');
//获取实际占用内存尺寸,单位字节
$table->momorySize();
````
#### RPC

RPC(Remote Procedure Call)：远程过程调用，它是一种通过网络从远程计算机程序上请求服务，而不需要了解底层网络技术的思想。
[详细介绍](https://developer.51cto.com/art/201906/597963.htm "详细介绍")

解决分布式系统中，服务之间的调用问题。
远程调用时，要能够像本地调用一样方便，让调用者感知不到远程调用的逻辑。
节点角色说明：
Server: 暴露服务的服务提供方
Client: 调用远程服务的服务消费方
Registry: 服务注册与发现的注册中心

##### think-swoole实现RPC功能

##### 服务器端接口定义app/rpc/interfaces/UserInterface.php
````
<?php
namespace app\rpc\interfaces;
interface UserInterface
{
    public function create();
    public function find(int $id);
}
````
##### 实现接口app/rpc/services/UserService.php
````
<?php
namespace app\rpc\services;
use app\rpc\interfaces\UserInterface;
class UserService implements UserInterface
{
    public function create()
    {
        // TODO: Implement create() method.
        return "service create success";
    }
    public function find(int $id)
    {
        // TODO: Implement find() method.
        return $id. "查询数据遍历";
    }
}
````
##### 注册rpc服务config/swoole.php
````
'rpc'        => [
        'server' => [
            //开启rpc服务
            'enable'   => true,
            //rpc端口
            'port'     => 9000,
            'services' => [
                //注册服务
                \app\rpc\services\UserService::class
            ],
        ],
        // 如果填写也是可以调用其他服务端
        'client' => [
        ],
    ],
````
##### 启动服务端
````
php think swoole start / php think 
````
##### swoole:rpc客户端
````
	'rpc'        => [
        'server' => [
        ],
        'client' => [
            'tp6'=>[
                //服务端的ip地址
                'host'=>'127.0.0.1',
                //服务端对应的端口
                'port'=>'9000'
            ]
            // 更多服务端
        ],
    ],
````
##### 运行  php think rpc:interface生成RPC接口文件app\rpc.php
````
	<?php
/**
 * This file is auto-generated.
 */
declare(strict_types=1);
namespace rpc\contract\tp6;
interface UserInterface
{
    public function create();
    public function find(int $id);
}
return ['tp6' => ['rpc\contract\tp6\UserInterface']];
````
##### 在控制器调用
````
public function index(\rpc\contract\tp6\UserInterface $user)
    {
        //
        $user->find(1);
//        $user->create();
    }
````