uncommented logs and set them in debug mode

dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/reader/RunSPARQLQueryService.java

@@ -132,19 +132,19 @@ public class RunSPARQLQueryService {
 		} catch (InterruptedException e) {
 			e.printStackTrace();
 		}
-//		log.info("Retrieving "+recordId+" - isCollection:"+isCollection );
+		log.debug("Retrieving "+recordId+" - isCollection:"+isCollection );
 		String query = selectQueryTemplate.replaceAll("%record", "<"+recordId+">");
 		openConnection();
         StringWriter recordWriter = null;
         Model resultsModel = null;
         try {
-//        	log.debug("Started at: "+Calendar.getInstance().getTime().toString());
+       		log.debug("Started at: "+Calendar.getInstance().getTime().toString());
             GraphQuery graphQuery = connection.prepareGraphQuery(QueryLanguage.SPARQL, query);
             GraphQueryResult graphQueryResult = graphQuery.evaluate();
             resultsModel = QueryResults.asModel(graphQueryResult);
             graphQueryResult.close();
-//			log.debug("Finished at: "+Calendar.getInstance().getTime().toString());
-//			log.info("Statements retrieved: " + resultsModel.size());
+			log.debug("Finished at: "+Calendar.getInstance().getTime().toString());
+			log.debug("Statements retrieved: " + resultsModel.size());
 			if (resultsModel.size()==0) {
 				return -2;
 			}
@@ -154,7 +154,7 @@ public class RunSPARQLQueryService {
 		    parser.setCollection(isCollection);
 		    String bufferedRecord = recordWriter.toString();
 		    int size = parser.parse(bufferedRecord);
-//			log.debug("json elements: "+size);
+			log.debug("json elements: "+size);
 		    if (size==-1) {
 		    	return -4;
 			}