Remove need for reflection in SpringBootPlatformProvider

[jmax01]

We can remove the getPlatformField workaround in SpringBootPlatform pushing the SmartApplicationListener to the Delegate and registering it as a Bean thus registering as an ApplicationListener:

@Configuration
public class EmbeddedKeycloakConfig {

        @Bean
        @ConditionalOnMissingBean
        SpringBootPlatformProvider springBootPlatformProvider() {
            return (SpringBootPlatformProvider) Platform.getPlatform();
        }

@AutoService(PlatformProvider.class)
@Log4j2
public class SpringBootPlatformProvider implements PlatformProvider, SmartApplicationListener {

    Runnable onStartup;

    Runnable onShutdown;

    @Override
    public void onApplicationEvent(final ApplicationEvent event) {

        if (event instanceof ApplicationReadyEvent) {
            startup();
        }else if (event instanceof ContextStoppedEvent) {
            shutdown();
        }
    }

    @Override
    public boolean supportsEventType(final Class<? extends ApplicationEvent> eventType) {
        return ApplicationReadyEvent.class.equals(eventType) || ContextStoppedEvent.class.equals(eventType);
    }

    @Override
    public String getListenerId() {
        return this.getClass()
                .getName();
    }

    @Override
    public void onStartup(@SuppressWarnings("hiding") final Runnable onStartup) {
        this.onStartup = onStartup;
    }

    @Override
    public void onShutdown(@SuppressWarnings("hiding") final Runnable onShutdown) {
        this.onShutdown = onShutdown;
    }

    @Override
    public void exit(final Throwable cause) {

        LOGGER.error("exit", cause);
        ServicesLogger.LOGGER.fatal(cause);
        throw new RuntimeException(cause);
    }

    private void shutdown() {
        this.onShutdown.run();

    }

    private void startup() {
        this.onStartup.run();

    }
}

[thomasdarimont]

Thanks! Fixed via 4ac3a12