Designing SCADA application software : a practical approach

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Détails bibliographiques
Auteur principal:	McCrady, Stuart G.
Support:	E-Book
Langue:	Anglais
Publié:	San Diego : Elsevier Science & Technology Books, 2013.
Autres localisations:	Voir dans le Sudoc
Accès en ligne:	Accès à l'E-book
Lien:	Autre support: Designing SCADA Application Software

+ d'infos
Description:	Titre provenant de la page de titre du document numérique Numérisation de l'édition de San Diego : Elsevier Science & Technology Books, 2013 La pagination de l'édition imprimée correspondante est de 245 p.
ISBN:	9780124170353

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return true; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data) { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data); }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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Designing SCADA application software : a practical approach

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