001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.test;
016    
017    import java.util.concurrent.Callable;
018    import java.util.concurrent.TimeUnit;
019    
020    /**
021     * @author Andr?? de Oliveira
022     */
023    public class IdempotentRetryAssert {
024    
025            public static <T> T retryAssert(
026                            long timeout, TimeUnit timeoutTimeUnit, Callable<T> callable)
027                    throws Exception {
028    
029                    return retryAssert(
030                            timeout, timeoutTimeUnit, 0, TimeUnit.SECONDS, callable);
031            }
032    
033            public static <T> T retryAssert(
034                            long timeout, TimeUnit timeoutTimeUnit, long pause,
035                            TimeUnit pauseTimeUnit, Callable<T> callable)
036                    throws Exception {
037    
038                    long deadline =
039                            System.currentTimeMillis() + timeoutTimeUnit.toMillis(timeout);
040    
041                    while (true) {
042                            try {
043                                    return callable.call();
044                            }
045                            catch (AssertionError ae) {
046                                    if (System.currentTimeMillis() > deadline) {
047                                            throw ae;
048                                    }
049                            }
050    
051                            Thread.sleep(pauseTimeUnit.toMillis(pause));
052                    }
053            }
054    
055    }