/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.fs.slive;
/**
* Simple timer class that abstracts time access
*/
class Timer {
// no construction allowed
private Timer() {
}
/**
* The current time in milliseconds
*
* @return long (milliseconds)
*/
static long now() {
return System.currentTimeMillis();
}
/**
* Calculates how much time in milliseconds elapsed from given start time to
* the current time in milliseconds
*
* @param startTime
* @return elapsed time (milliseconds)
*/
static long elapsed(long startTime) {
long elapsedTime = now() - startTime;
if (elapsedTime < 0) {
elapsedTime = 0;
}
return elapsedTime;
}
}