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The server checks all MD5 checksums against the entries in the database and returns a list of all the files for which the checksums did not match (i.e. a list of all files that are out of date). The following array is sent back for each file that is out of date: (all of those things are read from
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The server establishes a session and responds with the session id and the server's jar URL for that program. From this point on the client and server are in a session and the server therefore remembers what program the client wants to update during all further requests connected to that specific
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The client begins to patch once all out of date files are downloaded. It copies the current jar's up to date files into a new jar file and then writes the downloaded files into that jar. Once all is done without errors it replaces the old jar with the up to date jar, hence completing the
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programs. The utility ensures that the user can always be notified of new versions, and easily upgrade to the latest version from within the program, without having to do anything. The utility only downloads the files that are out of date, saving bandwidth.
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JUpdater requires a central server that contains information about the latest version. The clients connect to the server in order to check if there are new versions and to download the changes and changelog. The server requires PHP 4.3 or greater and
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server part, which keeps track of the versions and provides the client with all the info it requires. The project is still in development, possibly containing bugs. Any program that is to be updated via JUpdater has to be contained in a
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The client starts downloading the out of date files one by one into a temporary storage. For each file the client calculates the MD5 checksum and make sure that it matches, otherwise it tries again (until it's out of
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The client requests a changelog from the server (via XML-RPC). The server responds with all changes (as entered by the administrator) made between the client's versions and the latest version.
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for all local files that it can find (looking in the file list from the server), the rest are given a checksum of 0. The client then sends the result to the server (via XML-RPC).
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A small bundle of classes, a JUpdater client, has to be added to programs so that they can compare their versions with a central server. The client requires
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of the topic and provide significant coverage of it beyond a mere trivial mention. If notability cannot be shown, the article is likely to be
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can optionally be implemented in order to listen to the update process. This information can then for instance be displayed in a
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The JUpdater instance's updateJar method is called with the name of the jar file to update and the relevant program name.
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Check if a new version is available and get the corresponding changelog by using the
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The client displays the changes and asks the listener with shouldStartDownloading() if it should download the files.
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Here's an in depth description of what actually happens behind the scenes when performing a complete update check.
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is split into two parts. A small Java client, which can easily be implemented into existing programs, and a
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is a project which aims to create a utility that allows developers to quickly implement version checks into
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The client stores the server's response and sends a request for the file list of the server's jar file via
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If false is returned from the method then the client stops here, otherwise it continues.
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The client opens a connection to the server and sends the program name (via HTTP Post).
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If nothing is out of date then the client stops here, otherwise it continues.
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Please help to demonstrate the notability of the topic by citing
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Check if a new version is available on the server by using the
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checksums, this is done in several steps described below.
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DKP Log Parser's JUpdater client implementation's GUI.
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Update a specified jar file by comparing all files'
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33:notability guidelines for products and services
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118:Learn how and when to remove this message
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400:- The readme for the application.
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156:0.5 / March 24, 2006
40:reliable secondary sources
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67:"JUpdater"
52:redirected
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42:that are
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230:jar file
221:JUpdater
210:JUpdater
131:JUpdater
359:update.
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198:Website
187:License
92:scholar
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99:JSTOR
85:books
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214:Java
192:LGPL
177:Type
71:news
287:GUI
281:An
261:MD5
250:JRE
225:PHP
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
