Implemented import of portal files to DataNodes

src/main/java/it/inaf/oats/vospace/exception/InternalFaultException.java

-/*
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- */
 package it.inaf.oats.vospace.exception;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.ResponseStatus;
 
-
 @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)   // Status code 500
 public class InternalFaultException extends VoSpaceException {
 
+    private static final Logger LOG = LoggerFactory.getLogger(InternalFaultException.class);
+
     public InternalFaultException(String msg) {
         super("InternalFaultException: " + msg);
     }
 
+    public InternalFaultException(Throwable cause) {
+        super("InternalFaultException: " + getMessage(cause));
+    }
+
+    private static String getMessage(Throwable cause) {
+        LOG.error("Exception caught", cause);
+        return cause.getMessage() != null ? cause.getMessage() : cause.getClass().getCanonicalName();
+    }
 }