假如要发100封邮件,for循环100遍,用户直接揭竿而起,什么破网站! 但实际上,我们很可能有超过1万的邮件。怎么处理这个延迟的问题? 答案就是用异步。把“发邮件”这个操作封装,然后后台异步地执行1万遍。这样的话,用户提交网页后,他所等待的时间只是“把发邮件任务请求推送进队列里”的时间。而我们的后台服务将在用户看不见的地方跑。 在实现“异步队列”这点上,有人采用MySQL表或者redis来存放待发送的邮件,然后,每分钟定时读取待发送列表,然后处理。这便是定时异步任务队列。但当前提交的任务要一分钟后才能执行,在某些实时性要求高的应用场景里还是不快,比如发送短信的场景,只要一提交任务,便要马上执行,用户不需要等待返回结果。 以下将探讨用php扩展swoole实现实时异步任务队列发送短信的方案。
服务端
第一步:创建tcp服务器
第二步:设置服务器的相关属性
第三步:设置服务端的相关回调函数处理任务
具体代码如下: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(
'worker_num' => 1, //一般设置为服务器CPU数的1-4倍
'daemonize' => 1, //以守护进程执行
'max_request' => 10000,
'dispatch_mode' => 2,
'task_worker_num' => 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",
)
);
$this->serv->on('Receive',array($this,'onReceive'));
$this->serv->on('Task',array($this,'onTask'));
$this->serv->on('Finish',array($this,'onFinish'));
$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['mobile'],$data['message']);
}
}
public function onFinish($serv, $task_id, $data){
echo "Task {$task_id} finish
";
}
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['partner_id'] = $pid;
$post_data['timestamp'] =$timestamp;
$post_data['mobile'] = $mobile;
$post_data['message'] = $text;
$post_data['sign'] = $send_sign;
$url='http://182.92.149.100/sendsms';
$o="";
foreach ($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, 'cookie.txt');
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();
?>
客户端
启动后端服务后,客户端首先创建tcp客户端服务器,然后连接tcp后端服务器,并向后端tcp服务器发送数据,具体代码如下: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('127.0.0.1',9501,1)){
throw new Exception(sprintf('Swoole Error: %s', $this->client->errCode));
}
}
public function send($data){
if($this->client->isConnected()){
$data = json_encode($data);
//print $data;
if($this->client->send($data)){
return 1;
}else{
throw new Exception(sprintf('Swoole Error: %s', $this->client->errCode));
}
}else{
throw new Exception('Swoole Server does not connected.');
}
}
public function close(){
$this->client->close();
}
}
$client= new Client();
$client->connect();
$data=array(
'mobile'=>'18511487955',
'message'=>'you mobile 18511487955'
);
if($client->send($data)){
echo 'succ';
}else{
echo 'fail';
}
?>
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