Java: An Explosion on the Internet.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Authors:	Read, Tim, Hall, Hazel
Format:	Recurso educativo Open Access
Language:	en
Published:	1996
Subjects:	Authoring Aids (Programming) Computer Interfaces Computer Software Computer Software Development Information Retrieval Information Science Internet Libraries Programming Languages Technological Advancement Users (Information)
Online Access:	Acceder al recurso
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author	Read, Tim Hall, Hazel
author_facet	Read, Tim Hall, Hazel Read, Tim Hall, Hazel
collection	Education Resources Information Center
contents	Java: An Explosion on the Internet. Read, Tim Hall, Hazel Authoring Aids (Programming) Computer Interfaces Computer Software Computer Software Development Information Retrieval Information Science Internet Libraries Programming Languages Technological Advancement Users (Information) Summer 1995 saw the release, with considerable media attention, of draft versions of Sun Microsystems' Java computer programming language and the HotJava browser. Java has been heralded as the latest "killer" technology in the Internet explosion. Sun Microsystems and numerous companies including Microsoft, IBM, and Netscape have agreed upon licensing terms. Java is set to change the way that people interact with intranets and the Internet. This paper discusses: (1) how a domestic interface development tool became an Internet product; (2) the Java environment and related products--HotJava, Java Virtual Machine, JavaOS, and JavaChips; (3) Java's strengths as a developer and user tool--platform independence, programming quality, object-orientation, security, commercial promise, and application integration; (4) Java's competitors--ActiveX and Inferno; and (5) Java applications--cybertrade (purchase of goods online), corporate information flow, and information services specific projects. Java offers a greater choice of tools for software development for several platforms, easing developer decisions on market penetration and choice of programming language. End-users can benefit from the enhancements Java brings to Web page design. In the field of library and information science, the most obvious applications are in information retrieval. Long term, Java's legacy is likely to lie in the shift toward true network computing. A glossary of terms is appended. (Contains 14 references.) (Author/SWC)
format	Recurso educativo Open Access
id	eric_ED411812
institution	ERIC Institute of Education Sciences
language	en
publishDate	1996
record_format	eric
spellingShingle	Java: An Explosion on the Internet. Read, Tim Hall, Hazel Authoring Aids (Programming) Computer Interfaces Computer Software Computer Software Development Information Retrieval Information Science Internet Libraries Programming Languages Technological Advancement Users (Information) Java: An Explosion on the Internet. Read, Tim Hall, Hazel Authoring Aids (Programming) Computer Interfaces Computer Software Computer Software Development Information Retrieval Information Science Internet Libraries Programming Languages Technological Advancement Users (Information) Summer 1995 saw the release, with considerable media attention, of draft versions of Sun Microsystems' Java computer programming language and the HotJava browser. Java has been heralded as the latest "killer" technology in the Internet explosion. Sun Microsystems and numerous companies including Microsoft, IBM, and Netscape have agreed upon licensing terms. Java is set to change the way that people interact with intranets and the Internet. This paper discusses: (1) how a domestic interface development tool became an Internet product; (2) the Java environment and related products--HotJava, Java Virtual Machine, JavaOS, and JavaChips; (3) Java's strengths as a developer and user tool--platform independence, programming quality, object-orientation, security, commercial promise, and application integration; (4) Java's competitors--ActiveX and Inferno; and (5) Java applications--cybertrade (purchase of goods online), corporate information flow, and information services specific projects. Java offers a greater choice of tools for software development for several platforms, easing developer decisions on market penetration and choice of programming language. End-users can benefit from the enhancements Java brings to Web page design. In the field of library and information science, the most obvious applications are in information retrieval. Long term, Java's legacy is likely to lie in the shift toward true network computing. A glossary of terms is appended. (Contains 14 references.) (Author/SWC)
title	Java: An Explosion on the Internet.
topic	Authoring Aids (Programming) Computer Interfaces Computer Software Computer Software Development Information Retrieval Information Science Internet Libraries Programming Languages Technological Advancement Users (Information)
url	https://eric.ed.gov/?id=ED411812

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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