Research on issues of worker storage client connection and cross-process communication
1. First of all, this wiki is based on the changes to the server code based on the structure of the company's project "[[Indoor Navigation Solution]]".
2. Secondly, I was born in ue4 and c++ and have never understood php. Before I learned about workman, my knowledge of PHP was only to use PHP to connect to the database, and then return the data to C++ for use through get. I don’t understand PHP syntax, code specifications, etc. So if there is anything wrong, please correct me.1: When the worker is a single process, the problem of sharing array variables
Requirements : When we process client connections, we need to divide client links into two categories: WeChat and Web. At the same time, they correspond one to one, that is, one WeChat terminal needs to correspond to one web terminal.Idea : Our idea is to create two arrays ($WX=array(); $Web=array()). Store all WeChat connections in $WX, and store all Web connections in Web.
Problem encountered : These two arrays are not stored all the time. When the connection arrives, it is clearly stored in the array, but when the message arrives, both arrays are empty.
Solution: ① Define these two arrays into the worker class. ②: Add "global $ws_worker;" to the first sentence of each function in your own running class to make our $ws_worker global. (Using C++ syntax, it is simply difficult to understand this way of writing!)
//在库文件worker.php里面添加、声明两个数组
//定义两个数组用于存储所有的WX连接，所有的Web连接
public $WX=array();
public $Web=array();//在我们自己写的run.php里面
//每个函数里面申明我们的全局worker
$ws_worker->onMessage = function($connection, $data)
{
global $ws_worker;
......
}2: When there are multiple worker processes, mutual communication between processes
Requirements : When we use workers as servers, when the number of connections is relatively small, we can use $ws_worker->count = 1; it can be completely handled. But if you encounter a project with a relatively large number of connections, then $ws_worker->count = 4; is still necessary.Idea : Use the worker-based component Channel to communicate between threads. Channel is two php files Client.php and Server.php.
The solution is available after downloading : ①: Register the event in the "onWorkerStart" function when the worker process starts (I understand it as registration). ②When communication between threads is required, we call "\Channel\Client::publish('Findandclose', $event_data);" for the registered corresponding event.
// 每个worker进程启动时(这个函数是进程间通讯，事件注册用)
$ws_worker->onWorkerStart = function($ws_worker)
{
//需要跨线程做的事都写在这里
// Channel客户端连接到Channel服务端
Channel\Client::connect('127.0.0.1', 2206);
// 注册"Findandforward"事件，用于消息转发时当前进程找不到对应连接时调用
Channel\Client::on('Findandforward', function($event_data)use($ws_worker){
if($event_data->type == 'Message')
{
if($event_data->from == 'WX')
{
foreach ($ws_worker->Web as $everyweb)
{
if($event_data->openid == $everyweb['openid'])
{
$everyweb['connect']->send($event_data->data);
break;
}
}
}
}
});
// 注册"Findandclose"事件，用于连接断开时当前进程找不到对应连接
Channel\Client::on('Findandclose', function($event_data)use($ws_worker){
if($event_data['Who_closed']== 'WX_closed')
{
foreach( $ws_worker->Web as $key => $value ) {
if($value['openid'] ==$event_data['openid'])
{
$ws_worker->Web[$key]['connect']->close();
array_splice($ws_worker->Web,$key,1);//重置数组
var_dump($ws_worker->Web);
savelog("在其它进程找到了需要关闭的Web连接"." ".$event_data['openid']);
break;
}
}
}
if($event_data['Who_closed']== 'Web_closed')
{
foreach( $ws_worker->WX as $key => $value ) {
if($value['openid'] ==$event_data['openid'])
{
$ws_worker->WX[$key]['connect']->close();
array_splice($ws_worker->WX,$key,1);//重置数组
var_dump($ws_worker->WX);
savelog("在其它进程找到了需要关闭的WX连接"." ".$event_data['openid']);
break;
}
}
}
});
};//调用我们的跨线程事件
if($jsondata->from == 'WX')
{
savelog("WX is sen Message the WX id is"." ".$jsondata->openid);
//循环$Web匹配本次消息的openid对应有就将小程序的消息转发给web
$isfind_theweb=false;//定义一个Bool变量，判断在当前线程是否找到对应的连接
foreach ($ws_worker->Web as $everyweb) {
if($jsondata->openid == $everyweb['openid'])
{
$isfind_theweb=true;//当前线程找到了对应连接
$everyweb['connect']->send($jsondata->data);
break;
}
}
if(!$isfind_theweb)//如果在这个进程没有找到对应的web，我们发送全局事件
{
savelog("当前进程未找到匹配连接");
$event_data = $jsondata;
// 向所有worker进程发布Findandforward事件
\Channel\Client::publish('Findandforward', $event_data);//Findandforward是我们要调用的事件名，$event_data是我们要传递的参数
}
}