001/*
002 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Sun Seng David TAN <stan@nuxeo.com>
016 */
017package org.nuxeo.functionaltests;
018
019import org.apache.commons.logging.Log;
020import org.apache.commons.logging.LogFactory;
021
022public abstract class WaitUntil {
023
024    public static final Log log = LogFactory.getLog(WaitUntil.class);
025
026    long timeout;
027
028    public WaitUntil(long timeout) {
029        this.timeout = timeout;
030    }
031
032    public WaitUntil() {
033        // default value 2 secs
034        timeout = 2000;
035    }
036
037    public void waitUntil() {
038        long starttime = System.currentTimeMillis();
039        Exception lastException = null;
040
041        while (starttime > System.currentTimeMillis() - timeout) {
042            try {
043                if (condition()) {
044                    return;
045                }
046                Thread.sleep(100);
047                lastException = null;
048            } catch (Exception e) {
049                log.warn("An exception while testing condition", e);
050                lastException = e;
051            }
052
053        }
054        throw new RuntimeException("Couldn't find element", lastException);
055    }
056
057    public abstract boolean condition();
058}