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  • May 12 13:20
    kunterbunt13 closed #132
  • May 12 13:20
    kunterbunt13 commented #132
  • May 12 12:46
    mordechaim commented #132
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  • Apr 29 12:56
    mordechaim closed #131
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    kunterbunt13 opened #131
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  • Apr 02 08:55
    seinecle opened #130
Osiris Team
@Osiris-Team
Is there any build server u would recommend?
Mordechai Meisels
@mordechaim
A build server is completely optional, local building is fine too. What I'm trying to say is that just like the jars get emitted by the build process, so should the config. Of course nothing keeps you from generating the config manually after each build.
Then, manually upload those files (jars and config) to cloud storage of your choice. Remember to use a canonical url for the config so clients should always point to the newest version.
So, your first comment is technically true.
Osiris Team
@Osiris-Team
Ok one more question. Is there some sheduler which automatically checks for new versions or does this process only happen before startup?
Mordechai Meisels
@mordechaim
Up to you. The default bootstrap does it at startup
Osiris Team
@Osiris-Team
Ok great thx for the help
What about the build server? I think that would make stuff easier right?
Mordechai Meisels
@mordechaim
Hell yes, but as long as you express the config generation directly in Maven/Gradle, the specific server you use doesn't really make a difference. Even local building will have the same results
Osiris Team
@Osiris-Team
So jenkins would be a build server right?
Mordechai Meisels
@mordechaim
Yes.
Travis or GitHub actions work seamlessly on GitHub hosted repos
The beauty of continuous integration is you can define which git branch should build a development build and which should be production. Update4j works very nicely, since you can have any amount of configs at once. Just pull the one you need and that app will run. You might have a dev config or prod config
Osiris Team
@Osiris-Team
Guys I am getting this issue. Any idea why?
: java.lang.IllegalStateException: Checksum of file 'update-AutoPlugLauncher.xml' does not match checksum in configuration. Expected: 5297b893, found: 266eb851
at org.update4j.ConfigImpl.validateFile(ConfigImpl.java:294)
at org.update4j.ConfigImpl.doUpdate(ConfigImpl.java:179)
at org.update4j.Configuration.update(Configuration.java:1016)
at org.update4j.Configuration.update(Configuration.java:944)
at org.update4j.Configuration.update(Configuration.java:855)
at com.osiris.autoplug.launcher.Main.lambda$main$1(Main.java:68)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1764)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1756)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
Failed to download update!
Mordechai Meisels
@mordechaim
The message is in the exception. The checksum doesn't match.
FWIW you shouldn't list the config itself in the config (obviously you already have that file), otherwise you'll get the size and checksum values of the previous config. You are running in a recursive loop.
Osiris Team
@Osiris-Team
ok thx
Osiris Team
@Osiris-Team
Can someone help me? update4j/update4j#100
Mordechai Meisels
@mordechaim
Do you still have any issues? ignoreBootConflict on the file should fix your exception
kvp24
@kvp24
Hello, first of all thank you for an amazing tool!
Currently I have to add updating facility for a legacy java desktop app written with "eclipse SWT" framework. Unfortunately eclipse SWT has different artifacts(jars) for different OS bitness.
Is there any way to define additional information about artifact OS bitness besides OS name ?
Mordechai Meisels
@mordechaim
@kvp24 Unfortunately no, but you can achieve this behavior by using 2 configs where you conditionally decide in the bootstrap which one to use.
kvp24
@kvp24

I did a hack. I wrote OS bitness to commentary field and overrode shouldCheckForUpdate method in UpdateHandler, it's looks working now.

Now I want sign my config. Everything works good with RSA key but if I use ECDSA key I get java.security.NoSuchAlgorithmException: SHA256withEC Signature not available at

Signature sign = Signature.getInstance("SHA256with" + key.getAlgorithm())

this line from ConfigMapper.java:239.
I belive it happens because of naming of algorithms, in java for ECDSA right alg name is "EC" KeyFactory.getInstance("EC") and therefore my key.getAlgorithm() is "EC" and Signature.getInstance("SHA256with" + key.getAlgorithm()) generates "SHA256withEC" instead of "SHA256withECDSA".
Is it bug or feature ?

Mordechai Meisels
@mordechaim
This was fixed in #89. Which version are you using?
kvp24
@kvp24
update4j 1.5.4 with OpenJDK Runtime Environment AdoptOpenJDK (build 15+36)
Mordechai Meisels
@mordechaim
Indeed this is a bug and #89 missed that. Will fix it on next release.
David Metzler
@metzlerd_gitlab
@Thank you for a great tool! @kvp24 I am also working with an old SWT based app. I was wondering if you had to deal with Mac distributions. SWT must run on thread 0 in order to work on a Mac. I'm looking for a way to make sure the Classpath features of update4j would be used but that then we launch the app on thread 0. Have you overcome this limitation?
Mordechai Meisels
@mordechaim

@metzlerd_gitlab I know very little about this but I can tell you that update4j does launch everything in a child thread.

Perhaps you can use update4j as an updater tool and not use the dynamic launch mechanism (i.e. you'll need a new JVM for the launch).

David Metzler
@metzlerd_gitlab
@mordechaim I have gotten this working by launching a whole new JVM after the update has completed for the launch (using ProcessBuilder/Process) but that creates two windowed processes, which means if the user pins the app to their system tray on a mac, then they bypass the updater altogether. I was trying to see if I could somehow start a process on thread 0 with a limited classpath, and then have the Configuration object add jars to the classpath (after having been updated) end then pass off execution to the other main method. That may not be possible.
Mordechai Meisels
@mordechaim
Well, you can do it, but update4j uses a separate thread by design. If you copy the launch code and remove the thread spawning you might get it to work on your own.
This line spawns the thread. The actual launch can skip this step, it's just here to give the business application a separate context.
David Metzler
@metzlerd_gitlab
Thanks, I'll give this a shot.
David Metzler
@metzlerd_gitlab
@mordechaim I tried this but ran into troubles as the constructor for LaunchContext is not public, so I couldn't new up a LaunchContext outside of the package. Is that something you would be willing to change?
Mordechai Meisels
@mordechaim
I don't think I'm going to change this. You could sort-of reimplement the whole launch process with your own logic using my code as helpful pointers. Or you can fork the project.
Mamadou Pathé LY
@foula_ly_twitter
Hello all i need help in how to use update4j in ant project
David Metzler
@metzlerd_gitlab
@mordechaim Thank you for considering. I have worked around this problem by using a two executable strategy that you documented in the Wiki and just using update4j for managing the upgrade process and not for launching. Wanted you to know that I still appreciated the work.
@foula_ly_twitter - could you be more specific? You could simply download the jar and include it as a dependancy. Not sure what is difficult about using upate4j in ant?
Mordechai Meisels
@mordechaim
@metzlerd_gitlab thanks
Julián Murphy
@fkmurphy
Hi, i have a modular application with openjdk 11 and i'm newby in the java world. Is it possible to update modular applications with update4j? I read link https://github.com/update4j/update4j/wiki/Documentation#integration-with-jlink but, i dont understand this. Do i have to replace bat/sh file generate jlink for the example in documentation?
thanks!
Mordechai Meisels
@mordechaim
@fkmurphy yes it is possible, but not when its part of the jlink image.
Julián Murphy
@fkmurphy
my application runs from the jlink generated script, therefore it is not possible. Alternatives?
Daniel
@danny:mdanny82.selfhost.eu
[m]
Hi, my application ist a runnable jar built with jdk 1.8. Is it possible to use update4j for this? Is there a tutorial which shows the steps from a runnable jar to the auto-updating application?
Mordechai Meisels
@mordechaim
While update4j wasnt designed for jdk8 there are a few forks that packported the project. Check out here.
There aren't any special rules regarding runnable jar files, but update4j will not handle it as runnable. Namely, you'll need to supply the main class the update4j (if you use the default bootstrap setup).
Start update4j as a runnable jar to see a quick reference guide