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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 React\Promise\PromiseInterface; |
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abstract class AbstractScheduler |
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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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protected $mh; |
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/** |
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* Options. |
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* @var CoOption |
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*/ |
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protected $options; |
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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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protected $added = []; |
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/** |
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* Deferreds. |
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* @var array |
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*/ |
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protected $deferreds = []; |
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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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abstract public function __construct(CoOption $options, $mh); |
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/** |
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* Call curl_multi_add_handle() or push into queue. |
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* @param resource $ch |
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* @return PromiseInterface |
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*/ |
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abstract public function add($ch); |
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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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abstract public function isEmpty(); |
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/** |
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* Do somthing with consumed handle. |
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*/ |
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abstract protected function interruptConsume(); |
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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->interruptConsume(); |
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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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protected 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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protected function resolveEntries(array $entries) |
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{ |
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foreach ($entries as $entry) { |
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$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
