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Java Forum / General / April 2006how to "push" updates to an installed java program?
hey thanks for checking out this post. I have an application that I made in java, and what I would like to do is have the application automatically check the web, and see if an update is available for the application, then automatically install any updates. For instance if I had say myApp version 1.0, and on the server there is a new version of the application myApp version 1.1, that only had minor differences in the downloadable file, what might be the best way to "push" the updated files onto the users computer. Ideally an article would be a great resource for me here, as I know that I do not simply want to download the entire application to the users machine each time that there is an update, rather I would like to be able to force them to download only the neccessary bits of the program that would correctly update their application. I am new at this whole auto-updating over the web thing, but feel that it is necessary for this application. Thanks for your help I am sure there should be much easier ways these days but long time ago (5 years) I did it for a company I was working for. What I did in that time was to (do everything manually) put all the codes, images and sounds (it was gambling application) into a jar file with low quality images/sounds and not all complete class files (not everybody had HighSpeed Internet those days). As soon as player started to play with the game, application was connecting to the server (socket connection) and downloading a list of files (manifest) and version numbers (small text file) and it was checking versions to see what needs to be downloaded and what is new. Pull those files using the same socket connection and update the game jar file after player was exiting the game. Next time player was running the game, game had better images/sounds and many new games (SlotMachines). As I said there should be some easier ways these days. > hey thanks for checking out this post. > > I have an application that I made in java, and what I would like to do > is have the application automatically check the web, and see if an > update is available for the application, then automatically install any > updates. Have you considered Java WebStart? It should do what you need. Dan.  SignatureDaniel Dyer http://www.dandyer.co.uk I considered webstart, however I want to be able to push the files onto the users computer as an update. I was considering the method listed above the last comment, but also thought that at this point in time it might just be overkill, or lack of experience that would drive me in that direction, so I was looking for some insight for updating desktop applications... thanks for the help tiewknvc9 schrieb: > I considered webstart, however I want to be able to push the files onto > the users computer as an update. In short: impossible. The users computer would have to continuously run a server process, have a port open and listen for update calls. You would have to know each and every user computer, complete with IP. These requirements are incompatible with company networks as well as with home computer setups. In your original message, you said: | what I would like to do is have the application automatically check | the web, and see if an update is available for the application, then | automatically install any updates. You get this for free with webstart. Timo > tiewknvc9 schrieb: >> I considered webstart, however I want to be able to push the files onto >> the users computer as an update. > > In short: impossible. no it is not , but may be ,only if someone does not know what they are doing, or does not have the background to do it. > The users computer would have to continuously run a server process, have > a port open and listen for update calls. You would have to know each and > every user computer, complete with IP. These requirements are > incompatible with company networks as well as with home computer setups. no you do not. I already do it for our staff in the office , people working at home , and our staff that are out traveling ,as well as using it for installing the system , by issuing the user a small "boot-strap" java program & password. > In your original message, you said: > [quoted text clipped - 3 lines] > > You get this for free with webstart. yes you can use webstart, but it means you need a process to support it. > Timo Steve SignatureNewsGuy.Com 30Gb $9.95 Carry Forward and On Demand Bandwidth >> tiewknvc9 schrieb: >>> I considered webstart, however I want to be able to push the files onto [quoted text clipped - 17 lines] > system , by issuing the user a small "boot-strap" java program & > password. When you say "no you do not.", I'm assuming you're refuting the claim "You would have to know each and every user computer, complete with IP." How do you do a "push" without knowing the IP? - Oliver steve schrieb: >> tiewknvc9 schrieb: >>> I considered webstart, however I want to be able to push the files onto >>> the users computer as an update. >> In short: impossible. >> > no it is not I am sure it is, and your explanation doesn't prove me wrong. You may not know that "push" has a very concise meaning: | [...] distribution mechanism where content is delivered to the user at | the behest of the content provider, rather than at the request of the | user. From: http://en.wikipedia.org/wiki/Push_media It is the opposite of the "pull" or "poll" method, which is used by WebStart for example. Timo > I have an application that I made in java, and what I would like to do > is have the application automatically check the web, and see if an > update is available for the application, then automatically install any > updates. Java Web Start /Thomas SignatureThe comp.lang.java.gui FAQ: ftp://ftp.cs.uu.nl/pub/NEWS.ANSWERS/computer-lang/java/gui/faq http://www.uni-giessen.de/faq/archiv/computer-lang.java.gui.faq/ I recommend Webstart too - however you might want to look at out the azereus (http://azureus.sourceforge.net/) team do it. I've not looked at the code myself however I know that from a client point of view the app starts, checks a website and if there are updates lists them. You click "OK" to download the updates and then it restarts the app for you (that is the bit that makes me "wow"). Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. 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