The Competitive Struggle.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Authors:	Barry, Jeff, Bilal, Dania, Penniman, W. David
Format:	Recurso educativo Open Access
Language:	en
Published:	1998
Subjects:	Information Industry Integrated Library Systems Library Automation Library Standards Marketing Surveys Tables (Data) Vendors
Online Access:	Acceder al recurso
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author	Barry, Jeff Bilal, Dania Penniman, W. David
author_facet	Barry, Jeff Bilal, Dania Penniman, W. David Barry, Jeff Bilal, Dania Penniman, W. David
collection	Education Resources Information Center
contents	The Competitive Struggle. Barry, Jeff Bilal, Dania Penniman, W. David Information Industry Integrated Library Systems Library Automation Library Standards Marketing Surveys Tables (Data) Vendors Presents results of a survey of 30 library systems vendors to examine how successfully they met the key challenges of 1997: integration, testing, and marketing a new generation of systems. Character-based systems, the Dublin Core, Java, and the Z39.50 standard are discussed. Profiles describing sales and product developments for each of the vendors are included. (AEF)
format	Recurso educativo Open Access
id	eric_EJ565401
institution	ERIC Institute of Education Sciences
language	en
publishDate	1998
record_format	eric
spellingShingle	The Competitive Struggle. Barry, Jeff Bilal, Dania Penniman, W. David Information Industry Integrated Library Systems Library Automation Library Standards Marketing Surveys Tables (Data) Vendors The Competitive Struggle. Barry, Jeff Bilal, Dania Penniman, W. David Information Industry Integrated Library Systems Library Automation Library Standards Marketing Surveys Tables (Data) Vendors Presents results of a survey of 30 library systems vendors to examine how successfully they met the key challenges of 1997: integration, testing, and marketing a new generation of systems. Character-based systems, the Dublin Core, Java, and the Z39.50 standard are discussed. Profiles describing sales and product developments for each of the vendors are included. (AEF)
title	The Competitive Struggle.
topic	Information Industry Integrated Library Systems Library Automation Library Standards Marketing Surveys Tables (Data) Vendors
url	https://eric.ed.gov/?id=EJ565401

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// 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 0; } /** * 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, $data): bool { if ($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): bool; }

* * @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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