Stability and debugging improvements.

module/communication/controller/src/main/java/org/openbase/jul/communication/controller/AbstractControllerServer.java

@@ -1258,6 +1258,6 @@ public String toString() {
         if (publisher == null) {
             return getClass().getSimpleName();
         }
-        return getClass().getSimpleName() + "[" + publisher.getScope() + "]";
+        return getClass().getSimpleName() + "[" + ScopeProcessor.generateStringRep(publisher.getScope(), "?") + "]";
     }
 }

module/communication/default/src/main/java/org/openbase/jul/communication/exception/RPCResolvedException.java

@@ -75,10 +75,11 @@ public RPCResolvedException(final RPCException rpcException) {
      * Method parses the RPCException message and resolves the causes and messagen and use those to reconstruct the exception chain.
      *
      * @param rpcException the origin RPCException
+     *
      * @return the reconstruced excetion cause chain.
      */
-    public static Exception resolveRPCException(final RPCException rpcException) {
-        Exception exception = null;
+    public static Throwable resolveRPCException(final RPCException rpcException) {
+        Throwable exception = null;
 
         // build stacktrace array where each line is stored as entry. entry is extract each line stacktrace into arr
         final String[] stacktrace = ("Caused by: " + rpcException.getMessage()).split("\n");
@@ -97,15 +98,16 @@ public static Exception resolveRPCException(final RPCException rpcException) {
                     final String message = causes.length <= 2 ? "" : stacktrace[i].substring(stacktrace[i].lastIndexOf(exceptionClassName) + exceptionClassName.length() + 2).trim();
 
                     // detect exception class
-                    final Class<Exception> exceptionClass;
+                    final Class<Throwable> exceptionClass;
                     try {
-                        exceptionClass = (Class<Exception>) Class.forName(exceptionClassName);
+                        exceptionClass = (Class<Throwable>) Class.forName(exceptionClassName);
 
                         // build exception
                         try {
                             // try default constructor
                             exception = exceptionClass.getConstructor(String.class, Throwable.class).newInstance(message, exception);
-                        } catch (InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException | ClassCastException | UnsupportedOperationException ex) {
+                        } catch (InstantiationException | IllegalAccessException | InvocationTargetException |
+                                 NoSuchMethodException | ClassCastException | UnsupportedOperationException ex) {
                             try {
                                 // try to handle missing fields
                                 if (exception == null && message.isEmpty()) {
@@ -117,7 +119,8 @@ public static Exception resolveRPCException(final RPCException rpcException) {
                                 } else {
                                     throw ex;
                                 }
-                            } catch (InstantiationException | IllegalAccessException | InvocationTargetException | NoSuchMethodException exx) {
+                            } catch (InstantiationException | IllegalAccessException | InvocationTargetException |
+                                     NoSuchMethodException exx) {
                                 throw new CouldNotPerformException("No compatible constructor found!", exx);
                             }
                         }

module/communication/mqtt/src/main/java/org/openbase/jul/communication/mqtt/RPCServerImpl.kt

@@ -24,6 +24,7 @@ import org.slf4j.LoggerFactory
 import java.lang.reflect.InvocationTargetException
 import java.time.Duration
 import java.util.*
+import java.util.concurrent.ExecutionException
 import java.util.concurrent.Future
 import java.util.concurrent.TimeUnit
 import java.util.concurrent.TimeoutException
@@ -158,19 +159,20 @@ class RPCServerImpl(
             val result = method.invoke(request.paramsList)
             responseBuilder.result = result
         } catch (ex: Exception) {
-            when (ex) {
-                is InvocationTargetException -> {
+            val targetException = when (ex) {
+                is InvocationTargetException, is ExecutionException -> {
                     if (JPService.verboseMode()) {
                         ExceptionPrinter.printHistory(ex, logger, LogLevel.WARN)
                     }
-                    responseBuilder.error = ex.cause?.stackTraceToString() ?: ex.stackTraceToString()
+                    ex.cause ?: ex
                 }
 
                 else -> {
                     ExceptionPrinter.printHistory(ex, logger, LogLevel.WARN)
-                    responseBuilder.error = CouldNotPerformException("Server error ${ex.message}").stackTraceToString()
+                    CouldNotPerformException("Server error ${ex.message}", ex)
                 }
             }
+            responseBuilder.error = targetException.stackTraceToString()
         }
 
         mqttClient.publish(

module/extension/type/processing/src/main/java/org/openbase/jul/extension/type/processing/ScopeProcessor.java

@@ -10,12 +10,12 @@
  * it under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Lesser Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Lesser Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/lgpl-3.0.html>.
@@ -34,6 +34,14 @@ public class ScopeProcessor {
 
     public static final String COMPONENT_SEPARATOR = "/";
 
+    public static String generateStringRep(final ScopeType.Scope scope, final String alternative) {
+        try {
+            return generateStringRep(scope);
+        } catch (CouldNotPerformException ex) {
+            return alternative;
+        }
+    }
+
     public static String generateStringRep(final ScopeType.Scope scope) throws CouldNotPerformException {
         try {
             if (scope == null) {
@@ -51,7 +59,7 @@ public static String generateStringRep(final Collection<String> components) thro
             for (String component : components) {
 
                 // merge to components in case they are connected by an empty one
-                if(component.isEmpty()) {
+                if (component.isEmpty()) {
                     continue;
                 }
 

module/extension/type/util/src/main/java/org/openbase/jul/extension/type/util/TransactionSynchronizationFuture.java

@@ -10,12 +10,12 @@
  * it under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Lesser Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Lesser Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/lgpl-3.0.html>.
@@ -107,7 +107,7 @@ protected boolean check(T message) throws CouldNotPerformException {
         final boolean result = dataProvider.getTransactionId() >= transactionId;
 
         if (!result) {
-            logger.debug("Transition check failed, received {} but waiting for {} of {}", dataProvider.getTransactionId(), transactionId, dataProvider);
+            logger.trace("Outdated transition {} received, waiting for {} of {}", dataProvider.getTransactionId(), transactionId, dataProvider);
         }
 
         return result;