OrientDB: retry edge creation in case of vertex stealing

gistfile1.java

  		int maxRetries=MVCC_MAX_RETRIES;
			boolean done=false;
			OConcurrentModificationException e =null;
			for (int i=1;i<=maxRetries;i++){
				try {
					Logger.debug("Creation of the edge. Attempt n. " + i);
					db.createEdge((ODocument)vertex1.reload().getRecord(),vertex2).save();
					done=true;
					Logger.debug("Edge created successfully after " + i + " attempts");
					break;
				}catch (OConcurrentModificationException ex){
					e=ex;
					Logger.debug ("+++ vertex1  was modified by another thread. Let's retry. This was the attempt n. " + i);
					Thread.sleep(1);
				}
			} 
			if (!done) throw e;