swoole學習之: 服務端(異步風格)-TCP/UDP服務器 - 屬性

本文是官方文檔 https://wiki.swoole.com/#/server/properties 的重新手打版本.

$setting

Server->set()函數所設置的參數會保存到Server->setting屬性上. 在回調函數中可以訪問運行參數的值.

Swoole\Server->setting

demo:

$server = new Swoole\Server('127.0.0.1', 9501);
$server->set([
    'worker_num'=>4,
]);
var_export($server->setting);
echo PHP_EOL;
//$server->start(); //這裏不需要start就可以執行上面的代碼

直接運行:

$master_pid

返回當前服務器主進程的PID

Swoole\Server->master_pid: int

demo:

$server = new Swoole\Server('127.0.0.1', 9501);
$server->set([
    'worker_num'=>4,
]);
var_export($server->setting);
echo PHP_EOL;
$server->on('start', function(Swoole\Server $server){
    //獲取當前服務器主進程的 PID
    echo 'master_pid:'.$server->master_pid.PHP_EOL;
});
$server->on('receive', function(Swoole\Server $server, $fd, $reactor_id, $data){
    //收到客戶端信息, 回覆內容, 並關閉連接
    $server->send($fd, 'Swoole Server received your data:'.trim($data).PHP_EOL);
    $server->close($fd);
});
$server->start();

啓動服務並使用telnet連接, 然後在客戶端發送消息"aaa":

$manager_pid

但會當前服務器管理進程的PID

Swoole\Server->manager_pid: int

只能在onStart、onWorkerStart之後獲取到

demo:

$server = new Swoole\Server('127.0.0.1', 9501);
$server->on('start', function(Swoole\Server $server){
    //獲取當前服務器管理進程的 PID
    echo 'manager_pid:'.$server->manager_pid.PHP_EOL;
});
$server->on('receive', function(Swoole\Server $server, $fd, $reactor_id, $data){
    //收到客戶端信息, 回覆內容, 並關閉連接
    $server->send($fd, 'Swoole Server received your data:'.trim($data).PHP_EOL);
    $server->close($fd);
});
$server->start();

和上面一樣, 啓動服務並使用telnet連接, 然後在客戶端發送消息"aaa":

$worker_id

得到當前Worker進程的編號, 包括Task進程.

Swoole\Server->worker_id: int

demo:

$server = new Swoole\Server('127.0.0.1', 9501);
$server->set([
    'worker_num'=>4,
    'task_worker_num'=>4,
]);
$server->on('workerStart', function(Swoole\Server $server, $workerId){
    if($server->taskworker){
        echo 'task workerId:'.$workerId;
        echo ', task worker_id:'.$server->worker_id.PHP_EOL;
    }else{
        echo 'workerId:'.$workerId;
        echo ', worker_id:'.$server->worker_id.PHP_EOL;
    }
});
//必須設置onReceive事件回調函數
$server->on('receive', function(Swoole\Server $server, $fd, $reactor_id, $data){
});
//必須設置onTask事件回調函數
$server->on('task', function(Swoole\Server $server, $task_id, $reactor_id, $data){
});
$server->start();

啓動服務器:

• 這個Swoole\Server->worker_id屬性與onWorkerStart的$worker_id是相同的.
• Worker進程編號範圍是[0, $server->setting['worker_num'] - 1]
• Task進程編號範圍是: [$sever->setting['worker_num'], $server->setting['worker_num'] + $server->setting['task_worker_num']].

Worker進程重啓後worker_id的值是不變的

$worker_pid

得到當前Worker進程的操作系統進程ID, 與posix_getpid()的返回值相同.

Swoole\Server->worker_pid: int

$taskworker

當前進程是否是Task進程

Swoole\Server->taskworker: bool

返回值: true表示當前進程是Task工作進程, 否則就是Worker進程

$connections

TCP連接迭代器, 可以使用foreach遍歷服務器當前所有的連接, 此屬性的功能與Server->getClientList是一致的, 但是更加友好.

遍歷的元素爲單個連接的fd.

Swoole\Server->connections

$connections屬性是一個迭代器對象, 不是PHP數組, 所以不能用var_dump或者數組下標來訪問, 只能通過foreach來循環.

• Base 模式
  • SWOOLE_BASE模式下不支持誇進程操作TCP連接, 因此在BASE模式中, 只能在當前進程內使用$connections迭代器.

demo:

foreach($server->connections as $fd){
    var_dump($fd);
}
echo '當前服務器共有'.count($server->connections).'個連接'.PHP_EOL;

$ports

監聽的端口數組. 如果服務器監聽了多個端口, 可以遍歷Server::$ports得到所有Swoole\Server\Port對象.

其中swoole_server::$ports[0]爲構造方法所設置的主服務器端口.

$ports = $server->ports;
$ports[0]->set($settings);
$ports[1]->on('receive', function(){
    //onReceive event callback function
});
```