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<?php |
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namespace mpyw\Co\Internal; |
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use mpyw\Co\CURLException; |
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use mpyw\RuntimePromise\Deferred; |
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class Scheduler |
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{ |
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/** |
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* cURL multi handle. |
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* @var resource |
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*/ |
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private $mh; |
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/** |
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* Options. |
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* @var CoOption |
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*/ |
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private $options; |
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/** |
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* cURL handles those have not been dispatched. |
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* @var array |
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*/ |
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private $queue = []; |
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/** |
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* cURL handles those have been already dispatched. |
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* @var array |
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*/ |
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private $added = []; |
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/** |
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* Deferreds. |
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* @var Deferred |
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*/ |
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private $deferreds = []; |
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/** |
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* TCP connection counter. |
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* @var ConnectionCounter |
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*/ |
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private $counter; |
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/** |
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* Constructor. |
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* Initialize cURL multi handle. |
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* @param CoOption $options |
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* @param resource $mh curl_multi |
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*/ |
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public function __construct(CoOption $options, $mh) |
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{ |
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$this->mh = $mh; |
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$this->options = $options; |
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$this->counter = new ConnectionCounter($options); |
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} |
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/** |
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* Call curl_multi_add_handle() or push into queue. |
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* @param resource $ch |
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* @param Deferred $deferred |
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*/ |
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public function add($ch, Deferred $deferred = null) |
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{ |
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$this->counter->isPoolFilled($ch) |
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? $this->addReserved($ch, $deferred) |
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: $this->addImmediate($ch, $deferred); |
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} |
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/** |
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* Are there no cURL handles? |
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* @return bool |
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*/ |
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public function isEmpty() |
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{ |
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return !$this->added && !$this->queue; |
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} |
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/** |
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* Call curl_multi_add_handle(). |
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* @param resource $ch |
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* @param Deferred $deferred |
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*/ |
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private function addImmediate($ch, Deferred $deferred = null) |
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{ |
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$errno = curl_multi_add_handle($this->mh, $ch); |
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if ($errno !== CURLM_OK) { |
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// @codeCoverageIgnoreStart |
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$msg = curl_multi_strerror($errno) . ": $ch"; |
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$deferred && $deferred->reject(new \RuntimeException($msg)); |
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return; |
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// @codeCoverageIgnoreEnd |
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} |
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$this->added[(string)$ch] = $ch; |
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$this->counter->addDestination($ch); |
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$deferred && $this->deferreds[(string)$ch] = $deferred; |
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} |
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/** |
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* Push into queue. |
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* @param resource $ch |
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* @param Deferred $deferred |
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*/ |
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private function addReserved($ch, Deferred $deferred = null) |
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{ |
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$this->queue[(string)$ch] = $ch; |
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$deferred && $this->deferreds[(string)$ch] = $deferred; |
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} |
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/** |
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* Poll completed cURL entries, consume cURL queue and resolve them. |
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*/ |
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public function consume() |
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{ |
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$entries = $this->readCompletedEntries(); |
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foreach ($entries as $entry) { |
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curl_multi_remove_handle($this->mh, $entry['handle']); |
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unset($this->added[(string)$entry['handle']]); |
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$this->counter->removeDestination($entry['handle']); |
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$this->queue && $this->add(array_shift($this->queue)); |
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} |
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$this->resolveEntries($entries); |
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} |
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/** |
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* Poll completed cURL entries. |
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* @return array |
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*/ |
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21 |
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private function readCompletedEntries() |
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{ |
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$entries = []; |
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// DO NOT call curl_multi_add_handle() until polling done |
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while ($entry = curl_multi_info_read($this->mh)) { |
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$entries[] = $entry; |
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} |
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return $entries; |
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} |
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/** |
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* Resolve polled cURLs. |
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* @param array $entries Polled cURL entries. |
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*/ |
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private function resolveEntries(array $entries) |
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{ |
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21 |
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foreach ($entries as $entry) { |
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10 |
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if (!isset($this->deferreds[(string)$entry['handle']])) { |
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1 |
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continue; |
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} |
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$deferred = $this->deferreds[(string)$entry['handle']]; |
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unset($this->deferreds[(string)$entry['handle']]); |
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$entry['result'] === CURLE_OK |
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? $deferred->resolve(curl_multi_getcontent($entry['handle'])) |
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: $deferred->reject(new CURLException(curl_error($entry['handle']), $entry['result'], $entry['handle'])); |
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} |
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} |
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} |
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mpyw /
co
