Here you can find the source of getNextTestIndexName()
public static String getNextTestIndexName()
//package com.java2s; /******************************************************************************* * Copyright (c) 2015 Eclipse RDF4J contributors. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Distribution License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/org/documents/edl-v10.php. *******************************************************************************/ import java.util.concurrent.atomic.AtomicLong; public class Main { /**/*from ww w . ja v a2 s .c om*/ * Counter used to uniquely name test indexes without using UUID's that may be causing path length issues. */ private static final AtomicLong TEST_COUNTER = new AtomicLong(0); public static String getNextTestIndexName() { return "rdf4j-es-testindex-" + TEST_COUNTER.incrementAndGet(); } }