一个用于消息队列的并发式php进程管理程序-进程

本程序是一个消息队列的守护进程，用于读取消息队列的消息，并启动相应的进程进行消息的处理的并发式php进程管理程序。

进程类

用来封装被管理的进程的信息。

进程里开辟了linux的双向管道，可以进行进程数据的通信。

 1 class Process {
 2     private $_resource = null;
 3     private $_pipes = array();
 4     private $_script = '';
 5     private $_max_exec_time = 30;
 6     private $_start_time = 0;
 7 
 8     private $_error = '';
 9     public $message_id = '';
10 
11     function __construct(&$executable, $script, $params) {
12         $this->_script = $script;
13         $this->_max_exec_time = $params['max_exec_time'];
14         $this->message_id = $params['message_id'];
15         $descriptorspec    = array(
16             0 => array('pipe', 'r'), // in
17             1 => array('pipe', 'w'), // out
18             2 => array('pipe', 'w')  // err
19         );
20         _print_log("start process ...");
21         $this->_resource  = proc_open($executable." ".$this->_script, $descriptorspec, $this->_pipes);
22         $this->_start_time = time();
23         if ( is_resource($this->_resource) ) {
24 
25             // print process status
26             $status = proc_get_status($this->_resource);
27             _print_log("process_status:".var_export($status, true));
28 
29             // write param to process
30             if ( !empty($params['params']) ) {
31                 $data = is_string($params['params'])? $params['params']:serialize($params['params']);
32                 fwrite($this->_pipes[IO::IN], $data);
33             }
34             $this->close_pipe(IO::IN);
35         } else {
36             _print_log("proc_open failed. ".$this->_script);
37         }
38     }
39 
40     function close_pipe($i) {
41         if ( isset($this->_pipes[$i]) ) {
42             fclose($this->_pipes[$i]);
43             unset($this->_pipes[$i]);
44         }
45     }
46     function get_script() {
47         return $this->_script;
48     }
49 
50     function get_error() {
51         $error = stream_get_contents($this->_pipes[IO::ERR]);
52         $this->close_pipe(IO::ERR);
53         return $error;
54     }
55 
56     // is still running?
57     function is_running() {
58         $status = proc_get_status($this->_resource);
59         return $status["running"];
60     }
61 
62     // long execution time, proccess is going to be killer
63     function is_over_executed() {
64         if ($this->_start_time + $this->_max_exec_time < time()) return true;
65         else return false;
66     }
67 
68     function get_result() {
69         $result = stream_get_contents($this->_pipes[IO::OUT]);
70         $this->close_pipe(IO::OUT);
71         return $result;
72     }
73 
74     function close() {
75         foreach ($this->_pipes as $pipe) {
76             fclose($pipe);
77         }
78         return proc_close($this->_resource);
79     }
80 }

posted on 2017-06-14 15:03 在这个肆意的青春岁月阅读(179) 评论(0) 收藏举报