Update/Fix engine init exception handling + errors

base/src/main/java/de/staropensource/engine/base/Engine.java

@@ -186,12 +186,8 @@ public final class Engine extends SubsystemClass {
      * @since v1-alpha6
      */
     private Engine() throws IllegalStateException {
-        if (instance == null)
-            instance = this;
-        else
-            return;
-
         long initTime = Miscellaneous.measureExecutionTime(() -> {
+            instance = this;
             state = EngineState.EARLY_STARTUP;
 
             new EngineConfiguration();
@@ -217,7 +213,7 @@ public final class Engine extends SubsystemClass {
                 try {
                     initializeSubsystems();
                 } catch (Exception exception) {
-                    logger.crash("Subsystem dependency resolution failed", exception);
+                    logger.error("Subsystem dependency resolution failed");
                 }
             }
         });
@@ -232,11 +228,22 @@ public final class Engine extends SubsystemClass {
      * Engine, if it isn't already.
      *
      * @throws IllegalStateException when running in an incompatible environment
+     * @throws RuntimeException      on engine initialization failure
      * @since v1-alpha6
      */
-    public static void initialize() throws IllegalStateException {
+    public static void initialize() throws IllegalStateException, RuntimeException {
-        if (instance == null)
+        try {
-            instance = new Engine();
+            if (instance == null)
+                new Engine();
+        } catch (IllegalStateException exception) {
+            throw exception;
+        } catch (Exception exception) {
+            logger.error("Engine initialization failed");
+            logger.error(Miscellaneous.getStackTraceHeader(exception));
+            for (String line : Miscellaneous.getStackTraceAsString(exception, true).split("\n"))
+                logger.error(line);
+            throw new RuntimeException("Engine initialization failed", exception);
+        }
     }
 
     /**

base/src/main/java/de/staropensource/engine/base/implementation/logging/PlainLoggingAdapter.java

@@ -59,7 +59,7 @@ public class PlainLoggingAdapter implements LoggingAdapter {
     public void print(@NotNull LogLevel level, @NotNull Class<?> issuerClass, @NotNull String issuerOrigin, @Nullable String issuerMetadata, @NotNull String message, @NotNull String format) {
         format = new EmptyShortcodeConverter(format, true).getClean();
         if (level == LogLevel.ERROR || level == LogLevel.CRASH)
-            if (EngineConfiguration.getInstance().isLoggerForceStandardOutput())
+            if (EngineConfiguration.getInstance() != null && EngineConfiguration.getInstance().isLoggerForceStandardOutput())
                 System.out.println(format);
             else
                 System.err.println(format);

base/src/main/java/de/staropensource/engine/base/logging/InitLogger.java

@@ -58,7 +58,7 @@ public final class InitLogger {
      */
     private static synchronized void log(@NotNull LogLevel level, @NotNull Class<?> issuerClass, @NotNull String issuerOrigin, @Nullable String issuerMetadata, @NotNull String message) {
         // Dismiss if level is not allowed
-        if (level.compareTo(EngineConfiguration.getInstance().getLoggerLevel()) < 0)
+        if ((EngineConfiguration.getInstance() != null && level.compareTo(EngineConfiguration.getInstance().getLoggerLevel()) < 0) || level.compareTo(LogLevel.INFORMATIONAL) < 0)
             return;
 
         // Invoke LoggingAdapter#prePlaceholder

testapp/src/main/java/de/staropensource/engine/testapp/Main.java

@@ -32,7 +32,6 @@ import de.staropensource.engine.windowing.implementable.Window;
 import de.staropensource.engine.windowing.type.input.Key;
 import de.staropensource.engine.windowing.type.input.KeyState;
 import lombok.Getter;
-import lombok.SneakyThrows;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -100,7 +99,6 @@ public final class Main {
      * @see #main(String[])
      * @since v1-alpha0
      */
-    @SneakyThrows
     public void run() {
         try {
             // Specify subsystems to load
@@ -112,7 +110,11 @@ public final class Main {
             );
 
             // Initialize sos!engine
-            Engine.initialize();
+            try {
+                Engine.initialize();
+            } catch (Exception exception) {
+                return;
+            }
 
             // Register events
             EventHelper.registerEvent(InputEvent.class, new EventListenerCode() {
@@ -166,7 +168,12 @@ public final class Main {
 
             logger.crash(message.toString());
         } catch (Exception exception) {
-            logger.crash("The main thread threw an exception", exception);
+            System.err.println("Caught throwable in main thread:");
+            System.err.println(Miscellaneous.getStackTraceHeader(exception));
+            System.err.println(Miscellaneous.getStackTraceAsString(exception, true));
+
+            // Halt JVM
+            Runtime.getRuntime().halt(255);
         }
     }