001/*
002 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Sun Seng David TAN <[email protected]>
018 */
019package org.nuxeo.functionaltests;
020
021import org.apache.commons.logging.Log;
022import org.apache.commons.logging.LogFactory;
023
024public abstract class WaitUntil {
025
026    public static final Log log = LogFactory.getLog(WaitUntil.class);
027
028    long timeout;
029
030    public WaitUntil(long timeout) {
031        this.timeout = timeout;
032    }
033
034    public WaitUntil() {
035        // default value 2 secs
036        timeout = 2000;
037    }
038
039    public void waitUntil() {
040        long starttime = System.currentTimeMillis();
041        Exception lastException = null;
042
043        while (starttime > System.currentTimeMillis() - timeout) {
044            try {
045                if (condition()) {
046                    return;
047                }
048                Thread.sleep(100);
049                lastException = null;
050            } catch (Exception e) {
051                log.warn("An exception while testing condition", e);
052                lastException = e;
053            }
054
055        }
056        throw new RuntimeException("Couldn't find element", lastException);
057    }
058
059    public abstract boolean condition();
060}