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  • May 04 13:54

    mordechaim on master

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Bernd Eilers
@bei
If you would like to contribute to the jpacktool-maven-plugin you would be welcome. As the author of update4j you probably have some own usefull ideas about what such a plugin should / could do.
Mordechai Meisels
@mordechaim
Wow! sounds interesting. Personally I never worked with Maven plugin development so I'm not sure how I'll help.
I can link it in the README if I find it useful. Gotta try it myself first.
Mordechai Meisels
@mordechaim

Btw reading this and see

<bootstrapMainModule>org.update4j.demo.bootstrap</bootstrapMainModule>

I don't think you need the module name if you have the class name. Remember, the module system disallows split packages.

Bernd Eilers
@bei
Well this not a required Argument. If it is present the startup Script in the Java Runtime created Calls Java with mainModule/mainClass if not just
with mainClass
Services
See java --help
Bernd Eilers
@bei
It would be probably Top war
It would be probably T
Bernd Eilers
@bei
It would be probably too early too mention my plugin in your README as of now it's just very experimentell and it's not published on Maven Central yet. But thanks for considering it and Thanks for trying it out if you may find the Time to do so.
Zachary Boe
@thezboe
does update4j support downloading over 2 way ssl?
Mordechai Meisels
@mordechaim

@thezboe Yes! In fact you can use any protocol of your choice, even old-fashioned sockets if you wish.

By default update4j will try to download a file using standard http/s and will assume that the file is publicly available. To change this, you should implement your own UpdateHandler and provide your own logic at openDownloadStream().

Once the connection was established, just return an InputStream; do not read the file yourself in that method, leave it up for the framework.

Then install the provider into the framework by following this guide.

myteer
@myteer
@mordechaim If both bootstrap app and business app are javafx application, and i have no right to modify business app, what can i do to avoid exception: “Application launch must not be called more than onceApplication launch must not be called more than once”
Mordechai Meisels
@mordechaim
@myteer You can't start JavaFX twice, but you can pass a new stage into the start() method:
var myapp = new MyApplication();
myapp.init(); // not needed if it wasn't overridden
myapp.start(new Stage());
myapp.stop();// also not needed if not overriden
Mordechai Meisels
@mordechaim
Note: Closing the bootstrap window before the business window is open might cause the runtime to exit. Call Platform.setImplicitExit(false) to prevent this, and remember to reset it to true once visible, or call Platform.exit() when you want to terminate.
myteer
@myteer
@mordechaim got it, thanks for your advice.
ddark008
@ddark008
Hello, can I launch app with javaagent with update4j?
Mordechai Meisels
@mordechaim
Yes, they shouldn't conflict in any way.
ddark008
@ddark008
Okey, next level, run app with javaagent on special version jre7?
Or just update and run exe files?
Mordechai Meisels
@mordechaim
Update4j must run on jdk 9+ but you can do the update and then launch a new instance of any jvm or script/executable without update4j at all. As the bullet points in the documentation says, use it for just the update feature.
Something like Runtime.getRuntime().exec()
Mordechai Meisels
@mordechaim
I just opened issue #88 that should make these kind of stuff easier.
mcesar29
@mcesar29
Hi, how can i use it with spring boot application?
hfbanilatq
@hfbanilatq
Hi how can I use it with spring boot too?
mcesar29
@mcesar29
@hfbanilatq can you use it with spring boot application?
Mordechai Meisels
@mordechaim
Yes, it can be used with Spring Boot. Here are a few points to keep in mind:
Spring applications usually don't restart often so you have to be careful to unload old versions on a running instance, follow up if you need assistance on this.
Mordechai Meisels
@mordechaim
Spring loads classes with reflection, and the classloader doesn't always find the new classes dynamically. Refer to the Classloader Model how to mitigate this problem.
eduarddevninja
@eduarddevninja
Hello, can I use update4j in a SWING application?
Mordechai Meisels
@mordechaim
update4j is platform agnostic. You can use it wherever you wish. Just remember to run the update code off the ETD and push visual updates (e.g. from UpdateHandler) through SwingUtilities.invokeLater()
eduarddevninja
@eduarddevninja
Amazing. Thank you
Osiris Team
@Osiris-Team
So Im new to update4j and Im trying to get it, so pls tell me if I got it correctly. I need to have 2 java apps in total. The first one creates the config.xml file and uploads it to the online http server. It contains the information of my 2nd apps latest version. The 2nd is the app that wants to get updated. It gets the latest config.xml from server and compares it with its local(older) config.xml. Then downloads the update. Is that correct?
Mordechai Meisels
@mordechaim
No. You would usually want the build server itself to create the config as part of the build process, since it deals with build artifacts.
The bootstrap/business architecture only comes to play at the client side. The bootstrap reads the config from the server and decides to do whatever you've designed it to do (remember 'create a framework yourself'?).
For ad hoc usage, start with the default bootstrap that lets you focus on the business app only. Run update4j as a jar file to get started.
Osiris Team
@Osiris-Team
Ok because till today I just worked with intellij and build everything localy
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.
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