StreamWriter::pause() - Code Metrics - dazzle-php/stream - Measure and Improve Code Quality continuously with Scrutinizer

StreamWriter::pause() A
last analyzed 2017-08-20 20:46 UTC

↳ Parent: StreamWriter

Complexity

Conditions	2
Paths	2

Size

Total Lines	9
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	6
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	9
ccs	6
cts	6
cp	1
rs	9.6666
c	0
b	0
f	0
cc	2
eloc	5
nc	2
nop	0
crap	2

<?php

namespace Dazzle\Stream;

use Dazzle\Throwable\Exception\Runtime\WriteException;
use Dazzle\Throwable\Exception\Logic\InvalidArgumentException;
use Dazzle\Loop\LoopAwareTrait;
use Dazzle\Loop\LoopInterface;
use Dazzle\Util\Buffer\Buffer;
use Dazzle\Util\Buffer\BufferInterface;
use Error;
use Exception;

class StreamWriter extends Sync\StreamWriter implements StreamWriterInterface
{
    use LoopAwareTrait;

    /**
     * @var bool
     */
    protected $writing;

    /**
     * @var bool
     */
    protected $paused;

    /**
     * @var BufferInterface
     */
    protected $buffer;

    /**
     * @param resource $resource
     * @param LoopInterface $loop
     * @param bool $autoClose
     * @throws InvalidArgumentException
     */
    public function __construct($resource, LoopInterface $loop, $autoClose = true)

    {
        parent::__construct($resource, $autoClose);

        if (function_exists('stream_set_write_buffer'))
        {
            stream_set_write_buffer($this->resource, 0);
        }

        $this->loop = $loop;
        $this->writing = false;
        $this->paused = true;
        $this->buffer = new Buffer();

        $this->resume();
    }

    /**
     *
     */
    public function __destruct()
    {
        parent::__destruct();

        unset($this->loop);
        unset($this->writing);
        unset($this->paused);
        unset($this->buffer);
    }

    /**
     * @override
     * @inheritDoc
     */
    public function isPaused()
    {
        return $this->paused;
    }

    /**
     * @override
     * @inheritDoc
     */
    public function setBufferSize($bufferSize)
    {
        $this->bufferSize = $bufferSize;
    }

    /**
     * @override
     * @inheritDoc
     */
    public function getBufferSize()
    {
        return $this->bufferSize;
    }

    /**
     * @override
     * @inheritDoc
     */
    public function pause()
    {
        if (!$this->paused)
        {
            $this->paused = true;
            $this->writing = false;
            $this->loop->removeWriteStream($this->resource);
        }
    }

    /**
     * @override
     * @inheritDoc
     */
    public function resume()
    {
        if ($this->writable && $this->paused)
        {
            $this->paused = false;
            if ($this->buffer->isEmpty() === false)

            {
                $this->writing = true;
                $this->loop->addWriteStream($this->resource, $this->getHandleWriteFunction());
            }
        }
    }

    /**
     * @override
     * @inheritDoc
     */
    public function write($text = '')

    {
        if (!$this->writable)
        {
            return $this->throwAndEmitException(
                new WriteException('Stream is no longer writable.')
            );
        }

        $this->buffer->push($text);

        if (!$this->writing && !$this->paused)
        {
            $this->writing = true;
            $this->loop->addWriteStream($this->resource, $this->getHandleWriteFunction());
        }

        return $this->buffer->length() < $this->bufferSize;
    }

    /**
     * @override
     * @inheritDoc
     */
    public function close()

    {
        if ($this->closing)
        {
            return;
        }

        $this->closing = true;
        $this->readable = false;
class MyClass { }

$x = new MyClass();
$x->foo = true;
        $this->writable = false;

        if ($this->buffer->isEmpty() === false)
        {
            $this->writeEnd();
        }

        $this->emit('close', [ $this ]);
        $this->handleClose();
        $this->emit('done', [ $this ]);
    }

    /**
     * Handle the outcoming stream.
     *
     * @internal
     */
    public function handleWrite()

    {
        $text = $this->buffer->peek();
        $sent = fwrite($this->resource, $text, $this->bufferSize);

        if ($sent === false)
        {
            $this->emit('error', [ $this, new WriteException('Error occurred while writing to the stream resource.') ]);
            return;
        }

        $lenBefore = strlen($text);
        $lenAfter = $lenBefore - $sent;
        $this->buffer->remove($sent);

        if ($lenAfter > 0 && $lenBefore >= $this->bufferSize && $lenAfter < $this->bufferSize)
        {
            $this->emit('drain', [ $this ]);
        }
        else if ($lenAfter === 0)
        {
            $this->loop->removeWriteStream($this->resource);
            $this->writing = false;
            $this->emit('drain', [ $this ]);
            $this->emit('finish', [ $this ]);
        }
    }

    /**
     * Handle close.
     *
     * @internal
     */
    public function handleClose()
    {
        $this->pause();

        parent::handleClose();
    }

    /**
     * Get function that should be invoked on write event.
     *
     * @return callable
     */
    protected function getHandleWriteFunction()
    {
        return [ $this, 'handleWrite' ];
    }

    /**
     *
     */
    private function writeEnd()

    {
        do
        {
            try
            {
                $sent = @fwrite($this->resource, $this->buffer->peek());
                $this->buffer->remove($sent);
            }
            catch (Error $ex)
            {
                $sent = 0;
            }
            catch (Exception $ex)
            {
                $sent = 0;
            }
        }
        while (is_resource($this->resource) && $sent > 0 && !$this->buffer->isEmpty());
    }
}


1			<?php
2
3			namespace Dazzle\Stream;
4
5			use Dazzle\Throwable\Exception\Runtime\WriteException;
6			use Dazzle\Throwable\Exception\Logic\InvalidArgumentException;
7			use Dazzle\Loop\LoopAwareTrait;
8			use Dazzle\Loop\LoopInterface;
9			use Dazzle\Util\Buffer\Buffer;
10			use Dazzle\Util\Buffer\BufferInterface;
11			use Error;
12			use Exception;
13
14			class StreamWriter extends Sync\StreamWriter implements StreamWriterInterface
15			{
16			use LoopAwareTrait;
17
18			/**
19			* @var bool
20			*/
21			protected $writing;
22
23			/**
24			* @var bool
25			*/
26			protected $paused;
27
28			/**
29			* @var BufferInterface
30			*/
31			protected $buffer;
32
33			/**
34			* @param resource $resource
35			* @param LoopInterface $loop
36			* @param bool $autoClose
37			* @throws InvalidArgumentException
38			*/
39	4	View Code Duplication	public function __construct($resource, LoopInterface $loop, $autoClose = true)
			0 ignored issues – show Duplication introduced 2017-08-20 20:46 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
40			{
41	4		parent::__construct($resource, $autoClose);
42
43	4		if (function_exists('stream_set_write_buffer'))
44			{
45	4		stream_set_write_buffer($this->resource, 0);
46			}
47
48	4		$this->loop = $loop;
49	4		$this->writing = false;
50	4		$this->paused = true;
51	4		$this->buffer = new Buffer();
52
53	4		$this->resume();
54	4		}
55
56			/**
57			*
58			*/
59	1		public function __destruct()
60			{
61	1		parent::__destruct();
62
63	1		unset($this->loop);
64	1		unset($this->writing);
65	1		unset($this->paused);
66	1		unset($this->buffer);
67	1		}
68
69			/**
70			* @override
71			* @inheritDoc
72			*/
73			public function isPaused()
74			{
75			return $this->paused;
76			}
77
78			/**
79			* @override
80			* @inheritDoc
81			*/
82			public function setBufferSize($bufferSize)
83			{
84			$this->bufferSize = $bufferSize;
85			}
86
87			/**
88			* @override
89			* @inheritDoc
90			*/
91	2		public function getBufferSize()
92			{
93	2		return $this->bufferSize;
94			}
95
96			/**
97			* @override
98			* @inheritDoc
99			*/
100	2		public function pause()
101			{
102	2		if (!$this->paused)
103			{
104	2		$this->paused = true;
105	2		$this->writing = false;
106	2		$this->loop->removeWriteStream($this->resource);
107			}
108	2		}
109
110			/**
111			* @override
112			* @inheritDoc
113			*/
114	4		public function resume()
115			{
116	4		if ($this->writable && $this->paused)
117			{
118	4		$this->paused = false;
119	4	View Code Duplication	if ($this->buffer->isEmpty() === false)
			0 ignored issues – show Duplication introduced 2017-06-24 21:21 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
120			{
121			$this->writing = true;
122			$this->loop->addWriteStream($this->resource, $this->getHandleWriteFunction());
123			}
124			}
125	4		}
126
127			/**
128			* @override
129			* @inheritDoc
130			*/
131	3	View Code Duplication	public function write($text = '')
			0 ignored issues – show Duplication introduced 2017-08-20 20:46 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
132			{
133	3		if (!$this->writable)
134			{
135			return $this->throwAndEmitException(
136			new WriteException('Stream is no longer writable.')
137			);
138			}
139
140	3		$this->buffer->push($text);
141
142	3		if (!$this->writing && !$this->paused)
143			{
144	3		$this->writing = true;
145	3		$this->loop->addWriteStream($this->resource, $this->getHandleWriteFunction());
146			}
147
148	3		return $this->buffer->length() < $this->bufferSize;
149			}
150
151			/**
152			* @override
153			* @inheritDoc
154			*/
155	1	View Code Duplication	public function close()
			0 ignored issues – show Duplication introduced 2017-08-20 20:46 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
156			{
157	1		if ($this->closing)
158			{
159			return;
160			}
161
162	1		$this->closing = true;
163	1		$this->readable = false;
			0 ignored issues – show Bug introduced 2017-06-24 21:21 UTC by Report Bug Copy Issue Report The property `readable` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
164	1		$this->writable = false;
165
166	1		if ($this->buffer->isEmpty() === false)
167			{
168			$this->writeEnd();
169			}
170
171	1		$this->emit('close', [ $this ]);
172	1		$this->handleClose();
173	1		$this->emit('done', [ $this ]);
174	1		}
175
176			/**
177			* Handle the outcoming stream.
178			*
179			* @internal
180			*/
181	3	View Code Duplication	public function handleWrite()
			0 ignored issues – show Duplication introduced 2017-08-20 20:46 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
182			{
183	3		$text = $this->buffer->peek();
184	3		$sent = fwrite($this->resource, $text, $this->bufferSize);
185
186	3		if ($sent === false)
187			{
188			$this->emit('error', [ $this, new WriteException('Error occurred while writing to the stream resource.') ]);
189			return;
190			}
191
192	3		$lenBefore = strlen($text);
193	3		$lenAfter = $lenBefore - $sent;
194	3		$this->buffer->remove($sent);
195
196	3		if ($lenAfter > 0 && $lenBefore >= $this->bufferSize && $lenAfter < $this->bufferSize)
197			{
198	2		$this->emit('drain', [ $this ]);
199			}
200	3		else if ($lenAfter === 0)
201			{
202	3		$this->loop->removeWriteStream($this->resource);
203	3		$this->writing = false;
204	3		$this->emit('drain', [ $this ]);
205	3		$this->emit('finish', [ $this ]);
206			}
207	3		}
208
209			/**
210			* Handle close.
211			*
212			* @internal
213			*/
214	2		public function handleClose()
215			{
216	2		$this->pause();
217
218	2		parent::handleClose();
219	2		}
220
221			/**
222			* Get function that should be invoked on write event.
223			*
224			* @return callable
225			*/
226	4		protected function getHandleWriteFunction()
227			{
228	4		return [ $this, 'handleWrite' ];
229			}
230
231			/**
232			*
233			*/
234		View Code Duplication	private function writeEnd()
			0 ignored issues – show Duplication introduced 2017-08-20 20:46 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
235			{
236			do
237			{
238			try
239			{
240			$sent = @fwrite($this->resource, $this->buffer->peek());
241			$this->buffer->remove($sent);
242			}
243			catch (Error $ex)
244			{
245			$sent = 0;
246			}
247			catch (Exception $ex)
248			{
249			$sent = 0;
250			}
251			}
252			while (is_resource($this->resource) && $sent > 0 && !$this->buffer->isEmpty());
253			}
254			}
255

dazzle-php / stream

StreamWriter::pause() A last analyzed 2017-08-20 20:46 UTC

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StreamWriter::pause() A
last analyzed 2017-08-20 20:46 UTC