[VTM] libgdx desktop ClassNotFoundException

[Gustl22]

Hi,

Maybe I'm birdbrained, but I'm trying to run the VTM playground/desktop applications, but I always got this message:

Fehler: Hauptklasse org.oscim.test.MapsforgeTest konnte nicht gefunden oder geladen werden.
Process finished with exit code 1

Translation: Main class org.oscim.test.MapsforgeTest/GdxMapApp could not be found or load.
So it doesn't even compile. But while building no error is thrown.

What I tried to do:
- Run on Windows 10 in AS
- Run on Ubuntu 17.10 in AS
- Reinstalled AS
- Fresh reload project from master
- Add mapfile to program arguments of course
- Edit config classpaths (to classpaths of module)
- Edit config working directory (to assets etc...)
- Run dependencies/classes/build/... in gradle window
Tried it in all variations...

The confusing point is:
All classes (with main() method) work, which do not extend from a class which implements the gdx ApplicationListener.

So am I missing any dependency?

Then I found this page on Stackoverflow.
But there's no "other -> Run" at vtm-playground gradle options. And the "application -> run" throws another error:

Error:(74, 1) Execution failed for task ':vtm-android-example:run'.
> java.io.IOException: Cannot run program "null/platform-tools/adb": error=2, File or folder not found

Although the android-example has nothing to do with the playground I think.

Thanks for your help, I'm just before to freak out.

Gustl

[Emux]

That was working always and got broken somewhere with new Gradle.

See my comment in relevant issue here.
I just enabled in build.gradle of VTM desktop apps the Gradle application plugin.

For vtm-playground can change there the mainClassName to run each example and pass args, e.g.:

./gradlew :vtm-playground:run -Pargs=/path/to/map

And can save such configuration in AS.

BTW the "run" task is under "application", offered by application plugin.

--
Emux

[Emux]

BTW if call simple ":run" AS can run all (desktop + Android) apps in project together.

That's why it's recommended to use the module too, like ":vtm-playground:run".

--
Emux

[Gustl22]

Wow, thank you Sir! Worked excellent!

Maybe can add a desktop.md in docs to inform newcomers?

BTW if call simple ":run" AS can run all (desktop + Android) apps in project together.

Yes, thats what I called before, then the second error appeared (Cannot run null/plattform/adb). But seems uninteresting now ;D

Thanks again :)

[Emux]

> Maybe can add a desktop.md in docs to inform newcomers?

Indeed we seem needing that now. :)

--
Emux

[Emux]

I created a desktop documentation for that.

If there are more to be mentioned please inform or even better can post a PR!

--
Emux

[Longri, Andre Höpfner]

Ok now I can start the vtm-playground but only if a Android device conected! And I can not start desktop only! 

If I start vtm-theme-comperator it starts Android and Playground on desktop but now theme-comperator!

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[Longri, Andre Höpfner]

Even debugging doesn't work for me, it doesn't stop at a breakpoint!

I know it's been a lot of work, but I ask you to think about returning to Gradle 3. x until everything runs smoothly, at Gradle!

[Emux]

See my related comment above.

If use simple :run task on a module (like with double-click) then AS starts all runnable modules!

The proper way is to use module prefix with the run:

./gradlew :vtm-playground:run -Pargs=/path/to/map

in command line, or edit the run configuration like in screenshot.

--
Emux

[Longri, Andre Höpfner]

Ok, works for playground, but without debugging!

And not working with theme-comparator

And I have not tested iOS!

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[Emux]

> Ok, works for playground, but without debugging!

Haven't checked that lately, and don't know if Gradle 4 or Android Studio 3.0.1 (stable channel) are responsible.

> And not working with theme-comparator

Cannot confirm that, either with command line or UI (screenshot) it runs.

./gradlew :vtm-theme-comparator:run

--
Emux

[Emux]

With latest Android Studio 3.2 the Desktop samples seem to run again directly from inside the IDE.

Just do a clean build before or via command line:

./gradlew clean build

--
Emux

[Gustl22]

How to create a executable jar from gradle?

I added this to playground build.gradle:

jar {
    manifest {
        attributes(
//                'Class-Path': configurations.compile.collect { it.getName() }.join(' '),
                'Main-Class': 'org.oscim.test.gdx.poi3d.Gdx3DTest'
        )
    }
}

But when I run it via java command it doesn't find the main class:

path/to/repo/mapsforge/vtm/vtm-playground/build/libs$ java -jar vtm-playground-master-SNAPSHOT.jar
Error: Could not find or load main class org.oscim.test.gdx.poi3d.Gdx3DTest

Class Path should be the current directory, so where's the fault... (need executable jar for debugging via gapid)

[Emux]

Probably need a "fat jar" task like in vtm-theme-comparator to collect all dependencies.

--
Emux

[Gustl22]

Thanks for your hint. But can't even run theme-comparator over "java -jar" command as it doesn't has Main-Class path specified in the Manifest file although I didn't change gradle file.
Did you manage to run desktop without IDE?

[Emux]

If run "fatjar" Gradle task of vtm-theme-comparator, it will produce a "vtm-theme-comparator-master-SNAPSHOT-jar-with-dependencies.jar" (~13MB).

Its manifest contains the main class and can run it outside the IDE.

--
Emux

[Gustl22]

As always, gave me the correct answer!

Was confused that "jar"-only task works with default build and the "fatjar" does not (only works as own task). And java's errors not really helped me solving the issue.

Thanks very much ;D Spent hours on this.