router

说明:

callback Gateway::$router

设置Gateway到BusinessWorker路由规则。默认规则是Gateway随机选择一个BusinessWorker进程,然后把当前client_id与这个BusinessWorker进程绑定,以后这个client_id的所有数据(onConnect/onMessage/onClose事件)都交给这个绑定的BusinessWorker进程处理。

期待该回调函数从所有到BusinessWorker进程的连接对象中选择一个并返回。

回调函数的参数

  • $worker_connnections

是一个包含了所有到BusinessWorker进程的连接对象数组。数组的下标是格式为ip:worker_name:worker_id的字符串。其中ip为worker所在服务器的ip,worker_name为$businessworker->name的值(name属性参见workerman手册),worker_id为自动分配的进程id编号(进程编号参见workerman手册)。这样通过下标就可以知道连接对应的worker在哪个服务器,属于哪组worker,进程编号是多少,可以方便的将消息路由给期望的服务器上的进程中去处理。

(注意:GatewayWorker2.0.4之前版本数组下标为ip:port,并非ip:worker_name:worker_id)

  • $client_connections

客户端连接对象,可以通过此对象获得客户端ip端口等信息,也可以向其添加一些动态属性用来保存当前连接的相关信息。

如果打印var_dump($client_connections),则是类似这样的数据。

array(4) {
  ["127.0.0.1:ChatBusinessWorker:0"]=>object(Workerman\Connection\TcpConnection)...,
  ["127.0.0.1:ChatBusinessWorker:1"]=>object(Workerman\Connection\TcpConnection)...,
  ["127.0.0.1:ChatBusinessWorker:2"]=>object(Workerman\Connection\TcpConnection)...,
  ["127.0.0.1:ChatBusinessWorker:3"]=>object(Workerman\Connection\TcpConnection)...,
}
  • $cmd

当前什么类型的消息,是个数字,分别可能为

CMD_ON_CONNECTION,即连接事件

CMD_ON_MESSAGE,即消息事件

CMD_ON_CLOSE,即客户端关闭事件

  • $buffer

客户端发来的数据。注意只有当 $cmdCMD_ON_MESSAGE$buffer才有值

返回值

返回 $worker_connnections 中的一个连接对象

范例 1 随机路由

use \GatewayWorker\Gateway;
$gateway = new Gateway("Websocket://0.0.0.0:8585");
// ===随机路由开始===
$gateway->router = function($worker_connections, $client_connection, $cmd, $buffer)
{
    return $worker_connections[array_rand($worker_connections)];
};
// ===随机路由结束===

$gateway->name = ...
...省略...

if(!defined('GLOBAL_START'))
{
    Worker::runAll();
}

范例 2 随机绑定

use \GatewayWorker\Gateway;
$gateway = new Gateway("Websocket://0.0.0.0:8585");

// ==绑定==
$gateway->router = function($worker_connections, $client_connection, $cmd, $buffer)
{
    // 临时给客户端连接设置一个businessworker_address属性,用来存储该连接被绑定的worker进程下标
    if (!isset($client_connection->businessworker_address) || !isset($worker_connections[$client_connection->businessworker_address])) {
            $client_connection->businessworker_address = array_rand($worker_connections);
        }
        return $worker_connections[$client_connection->businessworker_address];
};
// ==绑定==

$gateway->name = ...
...省略...

if(!defined('GLOBAL_START'))
{
    Worker::runAll();
}

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