Unable to launch Spring boot application

[zeljkosh]

I did try the launcher on several normal javafx applications and it works really nice, however when i did try to do it with spring boot it fails , giving me log file with just some "launcher" error and then i got stuck. I did however see that since version .18 spring boot is supported, so perhaps i am doing something wrong.

https://github.com/zeljkosh/demo
There is a link of my repo with just demo code, but you can check pom file if i am making any error.

Apr 09, 2019 12:10:52 PM fxlauncher.AbstractLauncher syncFiles INFO: Using cache dir C:\Users\ITsZeus\AppData\Local\Demo Apr 09, 2019 12:10:52 PM fxlauncher.AbstractLauncher createApplicationEnvironment INFO: Loading appClass com.example.demo.DemoApplication

that is above info from log file.

launcher it self throws two errors :

java.lang.NoClassDefFoundError: org/springframework/context/ConfigurableApplicationContext at com.example.demo.DemoApplication.start(DemoApplication.java:33) at fxlauncher.Launcher.startApplication(Launcher.java:242) at fxlauncher.Launcher.lambda$launchAppFromManifest$2(Launcher.java:194) at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326) at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) at com.sun.glass.ui.win.WinApplication._enterNestedEventLoopImpl(Native Method) at com.sun.glass.ui.win.WinApplication._enterNestedEventLoop(WinApplication.java:204) at com.sun.glass.ui.Application.enterNestedEventLoop(Application.java:511) at com.sun.glass.ui.EventLoop.enter(EventLoop.java:107) at com.sun.javafx.tk.quantum.QuantumToolkit.enterNestedEventLoop(QuantumToolkit.java:590) at javafx.stage.Stage.showAndWait(Stage.java:474) at javafx.scene.control.HeavyweightDialog.showAndWait(HeavyweightDialog.java:162) at javafx.scene.control.Dialog.showAndWait(Dialog.java:341) at fxlauncher.Launcher$1.lambda$reportError$2(Launcher.java:84) at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: org.springframework.context.ConfigurableApplicationContext at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 24 more

I hope someone can help me, thank you. if you need anything else let me know

[zeljkosh]

Well i had little chance to play again today, i tried to use headless launcher, and i did found this, however no luck.headless launcher would throw same mistake.
Now since 1.0.18 update perhaps it should work without it, but informations are quite limited on this subject and i had no luck making it work.
Any form of help would be appreciated!

[zeljkosh]

Well, i think i found a bug, and it is bit weird one.
For the sake of clarity i will post just the parts of pom.xml that are important for this bug .

             <execution>
                          <id>embed-custom-ui-in-launcher</id>
                          <phase>package</phase>
                          <goals>
                              <goal>exec</goal>
                          </goals>
                          <configuration>
                              <executable>jar</executable>
                              <workingDirectory>${app.dir}</workingDirectory>
                              <arguments>
                                  <argument>uf</argument>
                                  <argument>fxlauncher.jar</argument>
                                  <argument>-C</argument>
                                  <argument>${project.basedir}/../demo/target/classes</argument>
                                  <argument>.</argument>
                              </arguments>
                          </configuration>
                      </execution>-->
                    


                    <execution>
                        <id>configure-headless-launcher</id>
                        <phase>package</phase>
                        <goals>
                            <goal>exec</goal>
                        </goals>
                        <configuration>
                            <executable>jar</executable>
                            <workingDirectory>${app.dir}</workingDirectory>
                            <arguments>
                                <argument>uef</argument>
                                <argument>fxlauncher.HeadlessMainLauncher</argument>
                                <argument>fxlauncher.jar</argument>
                            </arguments>
                        </configuration>
                    </execution>

Above there are 2 execution settings, one to setup custom UI , and the other that sets the headless launcher.

When i comment setting of the custom UI out the application works, but when i want to setup custom ui, the application fails :

Here is the stack trace when custom ui option is enabled :

Apr 13, 2019 8:05:11 PM fxlauncher.AbstractLauncher createApplicationEnvironment
INFO: Loading appClass com.example.demo.DemoApplication
Exception in Application init method
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at fxlauncher.HeadlessMainLauncher.launchApp(HeadlessMainLauncher.java:76)
        at fxlauncher.HeadlessMainLauncher.process(HeadlessMainLauncher.java:51)
        at fxlauncher.HeadlessMainLauncher.main(HeadlessMainLauncher.java:33)
Caused by: java.lang.RuntimeException: Exception in Application init method
        at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:912)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/builder/SpringApplicationBuilder
        at com.example.demo.DemoApplication.bootstrapSpringApplicationContext(DemoApplication.java:57)
        at com.example.demo.DemoApplication.init(DemoApplication.java:28)
        at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:841)
        ... 2 more
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.builder.SpringApplicationBuilder
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 5 more

I hope anyone else can test just to confirm this, i did try with two different spring boot projects (both were just basic hello world stuff) but its the same. if i include headless launcher settings and comment out custom UI one, it works, but if i dont comment out custom UI execution settings it crashes.
100% recurrence rate.

[wcrozeta]

@zeljkosh, an alternative is change the class Launcher.java to call HeadlessMainLauncher.main(args) when appClass ins't subclass of javafx.application.Application! Doing it I could load CustomUI and Spring Boot 2.0 together.

private static String[] args;
public static void main(String[] args) {
    	Launcher.args = args;
        launch(args);
}

@Override
        protected void createApplication(Class<Application> appClass) {
            runAndWait(() ->
            {
                try {
                    if (Application.class.isAssignableFrom(appClass)) {
                        app = appClass.newInstance();
                    } else {
                    	
                    	HeadlessMainLauncher.main(args);
                        //throw new IllegalArgumentException(String.format("Supplied appClass %s was not a subclass of javafx.application.Application!", appClass));
                    }
                } catch (Throwable t) {
                    reportError("Error creating app class", t);
                }
            });
        }

[FelipeAumannRS]

@wcrozeta hope you see that
commenting on your previous response:

"app = appClass.newInstance();"
what app should be? Is it an instance of my class which extends Application (the same one which holds public static void main(String[] args) ?)
e.g: MyMainClass extends (ClassToInherit)
MyMainClass app = appClass.newInstance();

Also, my class isn't covering the method "createApplication(Class appClass)". Which class should I extend in order to override this method?
UPDATE: I should inherit Launcher from fxlauncher, but who should call for this method?

Also, I can't call Launcher.args (since args is not located in Launcher class from fxlauncher dependency)