Process::isStopped() - Code Metrics - Inspection of "fix bug" - huyanping/simple-fork-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( bd10e4...c7dba8 )

by Hu

created 2015-11-23 07:42 UTC

Process::isStopped() A

↳ Parent: Process

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	2

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
c	1
b	0
f	1
dl	0
loc	8
ccs	4
cts	4
cp	1
rs	9.4286
cc	2
eloc	4
nc	2
nop	0
crap	2

<?php
/**
 * Created by PhpStorm.
 * User: Jenner
 * Date: 2015/8/12
 * Time: 15:25
 */

namespace Jenner\SimpleFork;

class Process
{
    /**
     * @var Runnable|callable
     */
    protected $runnable;

    /**
     * @var int
     */
    protected $pid = 0;

    /**
     * @var string custom process name
     */
    protected $name = null;

    /**
     * @var bool if the process is started
     */
    protected $started = false;

    /**
     * @var bool
     */
    protected $running = false;

    /**
     * @var int the signal which made the process terminate
     */
    protected $term_signal = null;

    /**
     * @var int the signal which made the process stop
     */
    protected $stop_signal = null;

    /**
     * @var int error code
     */
    protected $errno = null;

    /**
     * @var string error message
     */
    protected $errmsg = null;

    /**
     * @var bool
     */
    protected $if_signal = false;

    /**
     * @var array
     */
    protected $callbacks = array();

    /**
     * @var array signal handlers
     */
    protected $signal_handlers = array();

    /**
     * event name of before process start
     */
    const BEFORE_START = 'beforeStart';

    /**
     * event name of before process exit
     */
    const BEFORE_EXIT = 'beforeExit';

    /**
     * event name of after process exit
     */
    const AFTER_FINISHED = 'afterFinished';


    /**
     * @param string $execution it can be a Runnable object, callback function or null
     * @param null $name process name,you can manager the process by it's name.
     */
    public function __construct($execution = null, $name = null)
    {
        if (!is_null($execution) && $execution instanceof Runnable) {

            $this->runnable = $execution;
        } elseif (!is_null($execution) && is_callable($execution)) {

            $this->runnable = $execution;
        } elseif (!is_null($execution)) {

            $message = "param execution is not a object of Runnable or callable";
            throw new \InvalidArgumentException($message);
        } else {
            Utils::checkOverwriteRunMethod(get_class($this));
        }
        if (!is_null($name)) {

            $this->name = $name;
        }

        $this->initStatus();
    }

    /**
     * get pid
     *
     * @return int
     */
    public function getPid()
    {
        return $this->pid;
    }

    /**
     * get or set name
     *
     * @param string|null $name
     * @return mixed
     */
    public function name($name = null)
    {
        if (!is_null($name)) {

            $this->name = $name;
        } else {
            return $this->name;
        }
    }

    /**
     * if the process is running
     *
     * @return bool
     */
    public function isRunning()
    {
        $this->updateStatus();
        return $this->running;
    }

    /**
     * if the process is stopped
     *
     * @return bool
     */
    public function isStopped()
    {
        if (is_null($this->errno)) {

            return false;
        }

        return true;
    }

    /**
     * if the process is started
     *
     * @return bool
     */
    public function hasStarted()
    {
        return $this->started;
    }

    /**
     * get pcntl errno
     *
     * @return int
     */
    public function errno()
    {
        return $this->errno;
    }

    /**
     * get pcntl errmsg
     *
     * @return string
     */
    public function errmsg()
    {
        return $this->errmsg;
    }

    public function ifSignal()
    {
        return $this->if_signal;
    }

    /**
     * start the sub process
     * and run the callback
     *
     * @return string pid
     */
    public function start()
    {
        if (!empty($this->pid) && $this->isRunning()) {
            throw new \LogicException("the process is already running");
        }

        $callback = $this->getCallable();

        $pid = pcntl_fork();
        if ($pid < 0) {
            throw new \RuntimeException("fork error");
        } elseif ($pid > 0) {
            $this->pid = $pid;
            $this->running = true;
            $this->started = true;
        } else {
            $this->pid = getmypid();
            $this->signal();
            foreach ($this->signal_handlers as $signal => $handler) {
                pcntl_signal($signal, $handler);
            }

            if (array_key_exists(self::BEFORE_START, $this->callbacks)) {
                $result = call_user_func($this->callbacks[self::BEFORE_START]);
                if ($result !== true) {
                    exit(0);

                }
            }

            $result = call_user_func($callback);

            if (array_key_exists(self::AFTER_FINISHED, $this->callbacks)) {
                call_user_func($this->callbacks[self::AFTER_FINISHED], $result);
            }

            exit(0);

        }
    }

    /**
     * kill self
     *
     * @param bool|true $block
     * @param int $signal
     */
    public function shutdown($block = true, $signal = SIGTERM)
    {
        if (empty($this->pid)) {
            $message = "the process pid is null, so maybe the process is not started";
            throw new \LogicException($message);
        }
        if (!$this->isRunning()) {
            throw new \LogicException("the process is not running");
        }
        if (!posix_kill($this->pid, $signal)) {
            throw new \RuntimeException("kill son process failed");
        }

        $this->updateStatus($block);
    }

    /**
     * waiting for the sub process exit
     *
     * @param bool|true $block if block the process
     * @param int $sleep default 0.1s check sub process status
     * every $sleep milliseconds.
     */
    public function wait($block = true, $sleep = 100000)
    {
        while (true) {
            if ($this->isRunning() === false) {
                return;
            }
            if (!$block) {
                break;
            }
            usleep($sleep);
        }
    }

    /**
     * register callback functions
     *
     * @param $event
     * @param $function
     */
    public function on($event, $function)
    {
        if (!is_callable($function)) {
            throw new \LogicException("the callback function is not callable");
        }

        $this->callbacks[$event] = $function;
    }

    /**
     * register sub process signal handler,
     * when the sub process start, the handlers will be registered
     *
     * @param $signal
     * @param callable $handler
     */
    public function registerSignalHandler($signal, callable $handler)
    {
        $this->signal_handlers[$signal] = $handler;
    }

    /**
     * you should overwrite this function
     * if you do not use the Runnable or callback.
     */
    public function run()
    {
    }

    /**
     * update the process status
     *
     * @param bool $block
     */
    protected function updateStatus($block = false)
    {
        if ($this->running !== true) {
            return;
        }

        if ($block) {
            $res = pcntl_waitpid($this->pid, $status);

        } else {
            $res = pcntl_waitpid($this->pid, $status, WNOHANG | WUNTRACED);
        }

        if ($res === -1) {
            $message = "pcntl_waitpid failed. the process maybe available";
            throw new \RuntimeException($message);
        } elseif ($res === 0) {
            $this->running = true;
        } else {
            if (pcntl_wifsignaled($status)) {
                $this->term_signal = pcntl_wtermsig($status);
            }
            if (pcntl_wifstopped($status)) {
                $this->stop_signal = pcntl_wstopsig($status);
            }
            if (pcntl_wifexited($status)) {
                $this->errno = pcntl_wexitstatus($status);
                $this->errmsg = pcntl_strerror($this->errno);
            } else {
                $this->errno = pcntl_get_last_error();
                $this->errmsg = pcntl_strerror($this->errno);
            }
            if (pcntl_wifsignaled($status)) {
                $this->if_signal = true;
            } else {
                $this->if_signal = false;
            }

            $this->running = false;
        }
    }

    /**
     * register signal SIGTERM handler,
     * when the parent process call shutdown and use the default signal,
     * this handler will be triggered
     */
    protected function signal()
    {
        pcntl_signal(SIGTERM, function () {
            if (!array_key_exists(self::BEFORE_EXIT, $this->callbacks)) {
                exit(0);

            }

            $result = call_user_func($this->callbacks[self::BEFORE_EXIT]);
            if ($result === true) {
                exit(0);

            }
        });
    }

    /**
     * get sub process callback
     *
     * @return array|callable|null
     */
    protected function getCallable()
    {
        $callback = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
        if (is_object($this->runnable) && $this->runnable instanceof Runnable) {
            $callback = array($this->runnable, 'run');
        } elseif (is_callable($this->runnable)) {
            $callback = $this->runnable;
        } else {
            $callback = array($this, 'run');
        }

        return $callback;
    }

    /**
     * init process status
     */
    protected function initStatus()
    {
        $this->pid = null;
        $this->running = null;
        $this->term_signal = null;
        $this->stop_signal = null;
        $this->errno = null;
        $this->errmsg = null;
    }
}

1		<?php
2		/**
3		* Created by PhpStorm.
4		* User: Jenner
5		* Date: 2015/8/12
6		* Time: 15:25
7		*/
8
9		namespace Jenner\SimpleFork;
10
11		class Process
12		{
13		/**
14		* @var Runnable\|callable
15		*/
16		protected $runnable;
17
18		/**
19		* @var int
20		*/
21		protected $pid = 0;
22
23		/**
24		* @var string custom process name
25		*/
26		protected $name = null;
27
28		/**
29		* @var bool if the process is started
30		*/
31		protected $started = false;
32
33		/**
34		* @var bool
35		*/
36		protected $running = false;
37
38		/**
39		* @var int the signal which made the process terminate
40		*/
41		protected $term_signal = null;
42
43		/**
44		* @var int the signal which made the process stop
45		*/
46		protected $stop_signal = null;
47
48		/**
49		* @var int error code
50		*/
51		protected $errno = null;
52
53		/**
54		* @var string error message
55		*/
56		protected $errmsg = null;
57
58		/**
59		* @var bool
60		*/
61		protected $if_signal = false;
62
63		/**
64		* @var array
65		*/
66		protected $callbacks = array();
67
68		/**
69		* @var array signal handlers
70		*/
71		protected $signal_handlers = array();
72
73		/**
74		* event name of before process start
75		*/
76		const BEFORE_START = 'beforeStart';
77
78		/**
79		* event name of before process exit
80		*/
81		const BEFORE_EXIT = 'beforeExit';
82
83		/**
84		* event name of after process exit
85		*/
86		const AFTER_FINISHED = 'afterFinished';
87
88
89		/**
90		* @param string $execution it can be a Runnable object, callback function or null
91		* @param null $name process name,you can manager the process by it's name.
92		*/
93	52	public function __construct($execution = null, $name = null)
94		{
95	52	if (!is_null($execution) && $execution instanceof Runnable) {
		1 ignored issue – show Coding Style introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report As per coding-style, please use `=== null` instead of `is_null`. Loading history...
96	9	$this->runnable = $execution;
97	52	} elseif (!is_null($execution) && is_callable($execution)) {
		1 ignored issue – show Coding Style introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report As per coding-style, please use `=== null` instead of `is_null`. Loading history...
98	40	$this->runnable = $execution;
99	46	} elseif (!is_null($execution)) {
		1 ignored issue – show Coding Style introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report As per coding-style, please use `=== null` instead of `is_null`. Loading history...
100		$message = "param execution is not a object of Runnable or callable";
101		throw new \InvalidArgumentException($message);
102		} else {
103	9	Utils::checkOverwriteRunMethod(get_class($this));
104		}
105	52	if (!is_null($name)) {
		1 ignored issue – show Coding Style introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report As per coding-style, please use `=== null` instead of `is_null`. Loading history...
106	3	$this->name = $name;
107	3	}
108
109	52	$this->initStatus();
110	52	}
111
112		/**
113		* get pid
114		*
115		* @return int
116		*/
117	9	public function getPid()
118		{
119	9	return $this->pid;
120		}
121
122		/**
123		* get or set name
124		*
125		* @param string\|null $name
126		* @return mixed
127		*/
128	3	public function name($name = null)
129		{
130	3	if (!is_null($name)) {
		1 ignored issue – show Coding Style introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report As per coding-style, please use `=== null` instead of `is_null`. Loading history...
131		$this->name = $name;
132		} else {
133	3	return $this->name;
134		}
135		}
136
137		/**
138		* if the process is running
139		*
140		* @return bool
141		*/
142	46	public function isRunning()
143		{
144	46	$this->updateStatus();
145	46	return $this->running;
146		}
147
148		/**
149		* if the process is stopped
150		*
151		* @return bool
152		*/
153	3	public function isStopped()
154		{
155	3	if (is_null($this->errno)) {
		1 ignored issue – show Coding Style introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report As per coding-style, please use `=== null` instead of `is_null`. Loading history...
156	3	return false;
157		}
158
159	3	return true;
160		}
161
162		/**
163		* if the process is started
164		*
165		* @return bool
166		*/
167	3	public function hasStarted()
168		{
169	3	return $this->started;
170		}
171
172		/**
173		* get pcntl errno
174		*
175		* @return int
176		*/
177	9	public function errno()
178		{
179	9	return $this->errno;
180		}
181
182		/**
183		* get pcntl errmsg
184		*
185		* @return string
186		*/
187	6	public function errmsg()
188		{
189	6	return $this->errmsg;
190		}
191
192	3	public function ifSignal()
193		{
194	3	return $this->if_signal;
195		}
196
197		/**
198		* start the sub process
199		* and run the callback
200		*
201		* @return string pid
202		*/
203	49	public function start()
204		{
205	49	if (!empty($this->pid) && $this->isRunning()) {
206		throw new \LogicException("the process is already running");
207		}
208
209	49	$callback = $this->getCallable();
210
211	49	$pid = pcntl_fork();
212	49	if ($pid < 0) {
213		throw new \RuntimeException("fork error");
214	49	} elseif ($pid > 0) {
215	49	$this->pid = $pid;
216	49	$this->running = true;
217	49	$this->started = true;
218	49	} else {
219		$this->pid = getmypid();
220		$this->signal();
221		foreach ($this->signal_handlers as $signal => $handler) {
222		pcntl_signal($signal, $handler);
223		}
224
225		if (array_key_exists(self::BEFORE_START, $this->callbacks)) {
226		$result = call_user_func($this->callbacks[self::BEFORE_START]);
227		if ($result !== true) {
228		exit(0);
		0 ignored issues – show Coding Style Compatibility introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report The method `start()` contains an exit expression. An exit expression should only be used in rare cases. For example, if you write a short command line script. In most cases however, using an `exit` expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage. Loading history...
229		}
230		}
231
232		$result = call_user_func($callback);
233
234		if (array_key_exists(self::AFTER_FINISHED, $this->callbacks)) {
235		call_user_func($this->callbacks[self::AFTER_FINISHED], $result);
236		}
237
238		exit(0);
		0 ignored issues – show Coding Style Compatibility introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report The method `start()` contains an exit expression. An exit expression should only be used in rare cases. For example, if you write a short command line script. In most cases however, using an `exit` expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage. Loading history...
239		}
240	49	}
241
242		/**
243		* kill self
244		*
245		* @param bool\|true $block
246		* @param int $signal
247		*/
248	12	public function shutdown($block = true, $signal = SIGTERM)
249		{
250	12	if (empty($this->pid)) {
251		$message = "the process pid is null, so maybe the process is not started";
252		throw new \LogicException($message);
253		}
254	12	if (!$this->isRunning()) {
255		throw new \LogicException("the process is not running");
256		}
257	12	if (!posix_kill($this->pid, $signal)) {
258		throw new \RuntimeException("kill son process failed");
259		}
260
261	12	$this->updateStatus($block);
262	12	}
263
264		/**
265		* waiting for the sub process exit
266		*
267		* @param bool\|true $block if block the process
268		* @param int $sleep default 0.1s check sub process status
269		* every $sleep milliseconds.
270		*/
271	25	public function wait($block = true, $sleep = 100000)
272		{
273	25	while (true) {
274	25	if ($this->isRunning() === false) {
275	25	return;
276		}
277	22	if (!$block) {
278		break;
279		}
280	22	usleep($sleep);
281	22	}
282		}
283
284		/**
285		* register callback functions
286		*
287		* @param $event
288		* @param $function
289		*/
290	3	public function on($event, $function)
291		{
292	3	if (!is_callable($function)) {
293		throw new \LogicException("the callback function is not callable");
294		}
295
296	3	$this->callbacks[$event] = $function;
297	3	}
298
299		/**
300		* register sub process signal handler,
301		* when the sub process start, the handlers will be registered
302		*
303		* @param $signal
304		* @param callable $handler
305		*/
306		public function registerSignalHandler($signal, callable $handler)
307		{
308		$this->signal_handlers[$signal] = $handler;
309		}
310
311		/**
312		* you should overwrite this function
313		* if you do not use the Runnable or callback.
314		*/
315		public function run()
316		{
317		}
318
319		/**
320		* update the process status
321		*
322		* @param bool $block
323		*/
324	46	protected function updateStatus($block = false)
325		{
326	46	if ($this->running !== true) {
327	24	return;
328		}
329
330	46	if ($block) {
331	12	$res = pcntl_waitpid($this->pid, $status);
		0 ignored issues – show Bug introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report The variable `$status` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
332	12	} else {
333	46	$res = pcntl_waitpid($this->pid, $status, WNOHANG \| WUNTRACED);
334		}
335
336	46	if ($res === -1) {
337		$message = "pcntl_waitpid failed. the process maybe available";
338		throw new \RuntimeException($message);
339	46	} elseif ($res === 0) {
340	46	$this->running = true;
341	46	} else {
342	43	if (pcntl_wifsignaled($status)) {
343	6	$this->term_signal = pcntl_wtermsig($status);
344	6	}
345	43	if (pcntl_wifstopped($status)) {
346		$this->stop_signal = pcntl_wstopsig($status);
347		}
348	43	if (pcntl_wifexited($status)) {
349	37	$this->errno = pcntl_wexitstatus($status);
350	37	$this->errmsg = pcntl_strerror($this->errno);
351	37	} else {
352	6	$this->errno = pcntl_get_last_error();
353	6	$this->errmsg = pcntl_strerror($this->errno);
354		}
355	43	if (pcntl_wifsignaled($status)) {
356	6	$this->if_signal = true;
357	6	} else {
358	37	$this->if_signal = false;
359		}
360
361	43	$this->running = false;
362		}
363	46	}
364
365		/**
366		* register signal SIGTERM handler,
367		* when the parent process call shutdown and use the default signal,
368		* this handler will be triggered
369		*/
370		protected function signal()
371		{
372		pcntl_signal(SIGTERM, function () {
373		if (!array_key_exists(self::BEFORE_EXIT, $this->callbacks)) {
374		exit(0);
		0 ignored issues – show Coding Style Compatibility introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report The method `signal()` contains an exit expression. An exit expression should only be used in rare cases. For example, if you write a short command line script. In most cases however, using an `exit` expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage. Loading history...
375		}
376
377		$result = call_user_func($this->callbacks[self::BEFORE_EXIT]);
378		if ($result === true) {
379		exit(0);
		0 ignored issues – show Coding Style Compatibility introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report The method `signal()` contains an exit expression. An exit expression should only be used in rare cases. For example, if you write a short command line script. In most cases however, using an `exit` expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage. Loading history...
380		}
381		});
382		}
383
384		/**
385		* get sub process callback
386		*
387		* @return array\|callable\|null
388		*/
389	49	protected function getCallable()
390		{
391	49	$callback = null;
		0 ignored issues – show Unused Code introduced 2015-11-23 07:38 UTC by Report Bug Copy Issue Report `$callback` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
392	49	if (is_object($this->runnable) && $this->runnable instanceof Runnable) {
393	9	$callback = array($this->runnable, 'run');
394	49	} elseif (is_callable($this->runnable)) {
395	40	$callback = $this->runnable;
396	40	} else {
397	6	$callback = array($this, 'run');
398		}
399
400	49	return $callback;
401		}
402
403		/**
404		* init process status
405		*/
406	52	protected function initStatus()
407		{
408	52	$this->pid = null;
409	52	$this->running = null;
410	52	$this->term_signal = null;
411	52	$this->stop_signal = null;
412	52	$this->errno = null;
413	52	$this->errmsg = null;
414		}
415		}

huyanping / simple-fork-php

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