/*
* Copyright 2016 the original author or authors.
*
* Licensed 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.gradle.internal.time;
public class Clock implements Timer {
private long startTime;
private long startInstant;
private TimeProvider timeProvider;
private static final long MS_PER_MINUTE = 60000;
private static final long MS_PER_HOUR = MS_PER_MINUTE * 60;
public Clock() {
this(new TrueTimeProvider());
}
/**
* Creates a clock with the specified startTime, in ms since epoch.
* An attempt is made to correct the startInstant for time elapsed since the specified startTime.
* However, this correction is susceptible to clock-shift, as well clocks that are not synchronized.
*/
public Clock(long startTime) {
this.timeProvider = new TrueTimeProvider();
this.startTime = startTime;
long msSinceStart = Math.max(timeProvider.getCurrentTime() - startTime, 0);
this.startInstant = timeProvider.getCurrentTimeForDuration() - msSinceStart;
}
protected Clock(TimeProvider timeProvider) {
this.timeProvider = timeProvider;
reset();
}
@Override
public String getElapsed() {
long timeInMs = getElapsedMillis();
return prettyTime(timeInMs);
}
@Override
public long getElapsedMillis() {
return Math.max(timeProvider.getCurrentTimeForDuration() - startInstant, 0);
}
public void reset() {
startTime = timeProvider.getCurrentTime();
startInstant = timeProvider.getCurrentTimeForDuration();
}
public long getStartTime() {
return startTime;
}
public static String prettyTime(long timeInMs) {
StringBuilder result = new StringBuilder();
if (timeInMs > MS_PER_HOUR) {
result.append(timeInMs / MS_PER_HOUR).append(" hrs ");
}
if (timeInMs > MS_PER_MINUTE) {
result.append((timeInMs % MS_PER_HOUR) / MS_PER_MINUTE).append(" mins ");
}
result.append((timeInMs % MS_PER_MINUTE) / 1000.0).append(" secs");
return result.toString();
}
}