Co::getApplier() - Code Metrics - Inspection of "Improved coverage" - mpyw/co - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 495cea...8436d0 )

by Ryosuke

created 2016-08-06 17:17 UTC

Co::getApplier() A

↳ Parent: Co

Complexity

Conditions	3
Paths	1

Size

Total Lines	14
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	3

Importance

Changes	2
Bugs	1	Features	0

Metric	Value
c	2
b	1
f	0
dl	0
loc	14
ccs	10
cts	10
cp	1
rs	9.4285
cc	3
eloc	9
nc	1
nop	3
crap	3

<?php

namespace mpyw\Co;
use mpyw\Co\Internal\Utils;
use mpyw\Co\Internal\CoOption;
use mpyw\Co\Internal\GeneratorContainer;
use mpyw\Co\Internal\CURLPool;

use mpyw\RuntimePromise\Deferred;
use mpyw\RuntimePromise\PromiseInterface;

class Co implements CoInterface
{
    /**
     * Instance of myself.
     * @var Co
     */
    private static $self;

    /**
     * Options.
     * @var CoOption
     */
    private $options;

    /**
     * cURL request pool object.
     * @var CURLPool
     */
    private $pool;

    /**
     * Overwrite CoOption default.
     * @param array $options
     */
    public static function setDefaultOptions(array $options)
    {
        CoOption::setDefault($options);
    }

    /**
     * Get CoOption default as array.
     * @return array
     */
    public static function getDefaultOptions()
    {
        return CoOption::getDefault();
    }

    /**
     * Wait until value is recursively resolved to return it.
     * This function call must be atomic.
     * @param  mixed $value
     * @param  array $options
     * @return mixed
     */
    public static function wait($value, array $options = [])
    {
        try {
            if (self::$self) {
                throw new \BadMethodCallException('Co::wait() is already running. Use Co::async() instead.');
            }
            self::$self = new self;
            self::$self->options = new CoOption($options);
            self::$self->pool = new CURLPool(self::$self->options);
            return self::$self->start($value);
        } finally {
            self::$self = null;
        }
        // @codeCoverageIgnoreStart
    }
    // @codeCoverageIgnoreEnd

    /**
     * Value is recursively resolved, but we never wait it.
     * This function must be called along with Co::wait().
     * @param  mixed $value
     * @param  mixed $throw
     */
    public static function async($value, $throw = null)
    {
        if (!self::$self) {
            throw new \BadMethodCallException('Co::async() must be called along with Co::wait(). ');
        }
        if ($throw !== null) {
            $throw = filter_var($throw, FILTER_VALIDATE_BOOLEAN, [
                'flags' => FILTER_NULL_ON_FAILURE,
            ]);
            if ($throw === null) {
                throw new \InvalidArgumentException("\$throw must be null or boolean.");
            }
        }
        self::$self->start($value, false, $throw);
    }

    /**
     * External instantiation is forbidden.
     */
    private function __construct() {}

    /**
     * Start resovling.
     * @param  mixed    $value
     * @param  bool     $wait
     * @param  mixed    $throw  Used for Co::async() overrides.
     * @param  mixed    If $wait, return resolved value.
     */
    private function start($value, $wait = true, $throw = null)
    {
        $deferred = new Deferred;
        // For convenience, all values are wrapped into generator
        $genfunc = function () use ($value, &$return) {
            try {
                $return = (yield $value);
            } catch (\RuntimeException $e) {
                $this->pool->reserveHaltException($e);
            }
        };
        $options = $throw === null ? $this->options : $this->options->reconfigure(['throw' => $throw]);
        $con = Utils::normalize($genfunc, $options);
        // We have to provide deferred object only if $wait
        $this->processGeneratorContainer($con, $deferred);
        // We have to wait $return only if $wait
        if ($wait) {
            $this->pool->wait();
            return $return;
        }
    }

    /**
     * Handle resolving generators.
     * @param  GeneratorContainer $gc
     * @param  Deferred           $deferred
     */
    private function processGeneratorContainer(GeneratorContainer $gc, Deferred $deferred)
    {
        // If generator has no more yields...
        if (!$gc->valid()) {
            // If exception has been thrown in generator, we have to propagate it as rejected value
            if ($gc->thrown()) {
                $deferred->reject($gc->getReturnOrThrown());
                return;
            }
            // Now we normalize returned value
            $returned = Utils::normalize($gc->getReturnOrThrown(), $gc->getOptions());
            $yieldables = Utils::getYieldables($returned);
            // If normalized value contains yieldables, we have to chain resolver
            if ($yieldables) {
                $this->promiseAll($yieldables, true)->then(
                    self::getApplier($returned, $yieldables, [$deferred, 'resolve']),
                    [$deferred, 'reject']
                );
                return;
            }
            // Propagate normalized returned value
            $deferred->resolve($returned);
            return;
        }

        // Check delay request yields
        if ($gc->key() === CoInterface::DELAY) {
            $dfd = new Deferred;
            $this->pool->addDelay($gc->current(), $dfd);
            $dfd->promise()->then(function () use ($gc) {
                $gc->send(null);
            })->always(function () use ($gc, $deferred) {
                $this->processGeneratorContainer($gc, $deferred);
            });
            return;
        }

        // Now we normalize yielded value
        $yielded = Utils::normalize($gc->current(), $gc->getOptions(), $gc->key());
        $yieldables = Utils::getYieldables($yielded);
        if (!$yieldables) {
            // If there are no yieldables, send yielded value back into generator
            $gc->send($yielded);
            // Continue
            $this->processGeneratorContainer($gc, $deferred);
            return;
        }

        // Chain resolver
        $this->promiseAll($yieldables, $gc->throwAcceptable())->then(
            self::getApplier($yielded, $yieldables, [$gc, 'send']),
            [$gc, 'throw_']
        )->always(function () use ($gc, $deferred) {
            // Continue
            $this->processGeneratorContainer($gc, $deferred);
        });
    }

    /**
     * Return function that apply changes in yieldables.
     * @param  mixed    $yielded
     * @param  array    $yieldables
     * @param  callable $next
     */
    private static function getApplier($yielded, $yieldables, callable $next)
    {
        return function (array $results) use ($yielded, $yieldables, $next) {
            foreach ($results as $hash => $resolved) {
                $current = &$yielded;
                foreach ($yieldables[$hash]['keylist'] as $key) {
                    $current = &$current[$key];
                }
                $current = $resolved;
                unset($current);
            }
            $next($yielded);
        };
    }

    /**
     * Promise all changes in yieldables are prepared.
     * @param  array $yieldables
     * @param  bool  $throw_acceptable
     * @return PromiseInterface
     */
    private function promiseAll($yieldables, $throw_acceptable)
    {
        $promises = [];
        foreach ($yieldables as $yieldable) {
            $dfd = new Deferred;
            $promises[(string)$yieldable['value']] = $dfd->promise();
            // If caller cannot accept exception,
            // we handle rejected value as resolved.
            if (!$throw_acceptable) {
                $original_dfd = $dfd;
                $dfd = new Deferred;
                $absorber = function ($any) use ($original_dfd) {
                    $original_dfd->resolve($any);
                };
                $dfd->promise()->then($absorber, $absorber);
            }
            // Add or enqueue cURL handles
            if (Utils::isCurl($yieldable['value'])) {
                $this->pool->addOrEnqueue($yieldable['value'], $dfd);
                continue;
            }
            // Process generators
            if (Utils::isGeneratorContainer($yieldable['value'])) {
                $this->processGeneratorContainer($yieldable['value'], $dfd);
                continue;
            }
        }
        return \mpyw\RuntimePromise\all($promises);
    }
}


1		<?php
2
3		namespace mpyw\Co;
4		use mpyw\Co\Internal\Utils;
5		use mpyw\Co\Internal\CoOption;
6		use mpyw\Co\Internal\GeneratorContainer;
7		use mpyw\Co\Internal\CURLPool;
8
9		use mpyw\RuntimePromise\Deferred;
10		use mpyw\RuntimePromise\PromiseInterface;
11
12		class Co implements CoInterface
13		{
14		/**
15		* Instance of myself.
16		* @var Co
17		*/
18		private static $self;
19
20		/**
21		* Options.
22		* @var CoOption
23		*/
24		private $options;
25
26		/**
27		* cURL request pool object.
28		* @var CURLPool
29		*/
30		private $pool;
31
32		/**
33		* Overwrite CoOption default.
34		* @param array $options
35		*/
36	1	public static function setDefaultOptions(array $options)
37	1	{
38	1	CoOption::setDefault($options);
39	1	}
40
41		/**
42		* Get CoOption default as array.
43		* @return array
44		*/
45	1	public static function getDefaultOptions()
46	1	{
47	1	return CoOption::getDefault();
48		}
49
50		/**
51		* Wait until value is recursively resolved to return it.
52		* This function call must be atomic.
53		* @param mixed $value
54		* @param array $options
55		* @return mixed
56		*/
57	15	public static function wait($value, array $options = [])
58	15	{
59		try {
60	15	if (self::$self) {
61	1	throw new \BadMethodCallException('Co::wait() is already running. Use Co::async() instead.');
62		}
63	15	self::$self = new self;
64	15	self::$self->options = new CoOption($options);
65	15	self::$self->pool = new CURLPool(self::$self->options);
66	15	return self::$self->start($value);
67		} finally {
68	15	self::$self = null;
69		}
70		// @codeCoverageIgnoreStart
71		}
72		// @codeCoverageIgnoreEnd
73
74		/**
75		* Value is recursively resolved, but we never wait it.
76		* This function must be called along with Co::wait().
77		* @param mixed $value
78		* @param mixed $throw
79		*/
80	6	public static function async($value, $throw = null)
81	6	{
82	6	if (!self::$self) {
83	1	throw new \BadMethodCallException('Co::async() must be called along with Co::wait(). ');
84		}
85	5	if ($throw !== null) {
86	3	$throw = filter_var($throw, FILTER_VALIDATE_BOOLEAN, [
87	3	'flags' => FILTER_NULL_ON_FAILURE,
88		]);
89	3	if ($throw === null) {
90	1	throw new \InvalidArgumentException("\$throw must be null or boolean.");
91		}
92		}
93	4	self::$self->start($value, false, $throw);
94	4	}
95
96		/**
97		* External instantiation is forbidden.
98		*/
99		private function __construct() {}
100
101		/**
102		* Start resovling.
103		* @param mixed $value
104		* @param bool $wait
105		* @param mixed $throw Used for Co::async() overrides.
106		* @param mixed If $wait, return resolved value.
107		*/
108	15	private function start($value, $wait = true, $throw = null)
109	15	{
110	15	$deferred = new Deferred;
111		// For convenience, all values are wrapped into generator
112		$genfunc = function () use ($value, &$return) {
113		try {
114	15	$return = (yield $value);
115	4	} catch (\RuntimeException $e) {
116	4	$this->pool->reserveHaltException($e);
117		}
118	15	};
119	15	$options = $throw === null ? $this->options : $this->options->reconfigure(['throw' => $throw]);
120	15	$con = Utils::normalize($genfunc, $options);
121		// We have to provide deferred object only if $wait
122	15	$this->processGeneratorContainer($con, $deferred);
123		// We have to wait $return only if $wait
124	12	if ($wait) {
125	12	$this->pool->wait();
126	9	return $return;
127		}
128	4	}
129
130		/**
131		* Handle resolving generators.
132		* @param GeneratorContainer $gc
133		* @param Deferred $deferred
134		*/
135	15	private function processGeneratorContainer(GeneratorContainer $gc, Deferred $deferred)
136	15	{
137		// If generator has no more yields...
138	15	if (!$gc->valid()) {
139		// If exception has been thrown in generator, we have to propagate it as rejected value
140	12	if ($gc->thrown()) {
141	5	$deferred->reject($gc->getReturnOrThrown());
142	5	return;
143		}
144		// Now we normalize returned value
145	12	$returned = Utils::normalize($gc->getReturnOrThrown(), $gc->getOptions());
146	12	$yieldables = Utils::getYieldables($returned);
147		// If normalized value contains yieldables, we have to chain resolver
148	12	if ($yieldables) {
149	3	$this->promiseAll($yieldables, true)->then(
150	3	self::getApplier($returned, $yieldables, [$deferred, 'resolve']),
151	3	[$deferred, 'reject']
152		);
153	3	return;
154		}
155		// Propagate normalized returned value
156	12	$deferred->resolve($returned);
157	12	return;
158		}
159
160		// Check delay request yields
161	15	if ($gc->key() === CoInterface::DELAY) {
162	3	$dfd = new Deferred;
163	3	$this->pool->addDelay($gc->current(), $dfd);
164		$dfd->promise()->then(function () use ($gc) {
165	3	$gc->send(null);
166		})->always(function () use ($gc, $deferred) {
167	3	$this->processGeneratorContainer($gc, $deferred);
168	3	});
169	3	return;
170		}
171
172		// Now we normalize yielded value
173	15	$yielded = Utils::normalize($gc->current(), $gc->getOptions(), $gc->key());
174	15	$yieldables = Utils::getYieldables($yielded);
175	15	if (!$yieldables) {
176		// If there are no yieldables, send yielded value back into generator
177	13	$gc->send($yielded);
178		// Continue
179	10	$this->processGeneratorContainer($gc, $deferred);
180	10	return;
181		}
182
183		// Chain resolver
184	15	$this->promiseAll($yieldables, $gc->throwAcceptable())->then(
185	12	self::getApplier($yielded, $yieldables, [$gc, 'send']),
186	12	[$gc, 'throw_']
187		)->always(function () use ($gc, $deferred) {
188		// Continue
189	12	$this->processGeneratorContainer($gc, $deferred);
190	12	});
191	12	}
192
193		/**
194		* Return function that apply changes in yieldables.
195		* @param mixed $yielded
196		* @param array $yieldables
197		* @param callable $next
198		*/
199	12	private static function getApplier($yielded, $yieldables, callable $next)
200	12	{
201		return function (array $results) use ($yielded, $yieldables, $next) {
202	10	foreach ($results as $hash => $resolved) {
203	10	$current = &$yielded;
204	10	foreach ($yieldables[$hash]['keylist'] as $key) {
205	6	$current = &$current[$key];
206		}
207	10	$current = $resolved;
208	10	unset($current);
209		}
210	10	$next($yielded);
211	12	};
212		}
213
214		/**
215		* Promise all changes in yieldables are prepared.
216		* @param array $yieldables
217		* @param bool $throw_acceptable
218		* @return PromiseInterface
219		*/
220	15	private function promiseAll($yieldables, $throw_acceptable)
221	15	{
222	15	$promises = [];
223	15	foreach ($yieldables as $yieldable) {
224	15	$dfd = new Deferred;
225	15	$promises[(string)$yieldable['value']] = $dfd->promise();
226		// If caller cannot accept exception,
227		// we handle rejected value as resolved.
228	15	if (!$throw_acceptable) {
229	8	$original_dfd = $dfd;
230	8	$dfd = new Deferred;
231	8	$absorber = function ($any) use ($original_dfd) {
232	6	$original_dfd->resolve($any);
233	8	};
234	8	$dfd->promise()->then($absorber, $absorber);
235		}
236		// Add or enqueue cURL handles
237	15	if (Utils::isCurl($yieldable['value'])) {
238	4	$this->pool->addOrEnqueue($yieldable['value'], $dfd);
239	4	continue;
240		}
241		// Process generators
242	14	if (Utils::isGeneratorContainer($yieldable['value'])) {
243	14	$this->processGeneratorContainer($yieldable['value'], $dfd);
244	11	continue;
245		}
246		}
247	12	return \mpyw\RuntimePromise\all($promises);
248		}
249		}
250

mpyw / co

Push — master ( 495cea...8436d0 )

Co::getApplier() A

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