/*
* IntervalTracker.java
*
* Copyright (C) 2009-12 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
package org.rstudio.core.client;
public class IntervalTracker
{
public IntervalTracker(long intervalMillis, boolean startElapsed)
{
threshold_ = intervalMillis;
if (!startElapsed)
reset();
}
public void reset()
{
lastTime_ = System.currentTimeMillis();
}
// alternate verison of reset which will prevent subsequent checks
// for only the duration specified (rather than the full intervalMillis)
public void reset(long preventMillis)
{
long offsetMillis = Math.max(0, threshold_ - preventMillis);
lastTime_ = System.currentTimeMillis() - offsetMillis;
}
public boolean hasElapsed()
{
return lastTime_ == null
|| System.currentTimeMillis() - lastTime_ >= threshold_;
}
private Long lastTime_;
private final long threshold_;
}