org.broadleafcommerce.core.util.StopWatch Maven / Gradle / Ivy
/*
* Copyright 2012 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.broadleafcommerce.core.util;
import org.apache.commons.lang.time.DurationFormatUtils;
/**
* @author Andre Azzolini (apazzolini)
*/
public class StopWatch {
private static final int STATE_UNSTARTED = 0;
private static final int STATE_RUNNING = 1;
private static final int STATE_STOPPED = 2;
private static final int STATE_SUSPENDED = 3;
private static final int STATE_UNSPLIT = 10;
private static final int STATE_SPLIT = 11;
private int runningState = STATE_UNSTARTED;
private int splitState = STATE_UNSPLIT;
private long startTime = -1;
private long stopTime = -1;
public StopWatch() {
start();
split();
}
public StopWatch start() {
if (this.runningState == STATE_STOPPED) {
throw new IllegalStateException("Stopwatch must be reset before being restarted. ");
}
if (this.runningState != STATE_UNSTARTED) {
throw new IllegalStateException("Stopwatch already started. ");
}
this.stopTime = -1;
this.startTime = System.currentTimeMillis();
this.runningState = STATE_RUNNING;
return this;
}
public StopWatch stop() {
if (this.runningState != STATE_RUNNING && this.runningState != STATE_SUSPENDED) {
throw new IllegalStateException("Stopwatch is not running. ");
}
if (this.runningState == STATE_RUNNING) {
this.stopTime = System.currentTimeMillis();
}
this.runningState = STATE_STOPPED;
return this;
}
public StopWatch reset() {
this.runningState = STATE_UNSTARTED;
this.splitState = STATE_UNSPLIT;
this.startTime = -1;
this.stopTime = -1;
return this;
}
public StopWatch split() {
if (this.runningState != STATE_RUNNING) {
throw new IllegalStateException("Stopwatch is not running. ");
}
this.stopTime = System.currentTimeMillis();
this.splitState = STATE_SPLIT;
return this;
}
public StopWatch unsplit() {
if (this.splitState != STATE_SPLIT) {
throw new IllegalStateException("Stopwatch has not been split. ");
}
this.stopTime = -1;
this.splitState = STATE_UNSPLIT;
return this;
}
public StopWatch suspend() {
if (this.runningState != STATE_RUNNING) {
throw new IllegalStateException("Stopwatch must be running to suspend. ");
}
this.stopTime = System.currentTimeMillis();
this.runningState = STATE_SUSPENDED;
return this;
}
public StopWatch resume() {
if (this.runningState != STATE_SUSPENDED) {
throw new IllegalStateException("Stopwatch must be suspended to resume. ");
}
this.startTime += (System.currentTimeMillis() - this.stopTime);
this.stopTime = -1;
this.runningState = STATE_RUNNING;
return this;
}
public long getTime() {
if (this.runningState == STATE_STOPPED || this.runningState == STATE_SUSPENDED) {
return this.stopTime - this.startTime;
} else if (this.runningState == STATE_UNSTARTED) {
return 0;
} else if (this.runningState == STATE_RUNNING) {
return System.currentTimeMillis() - this.startTime;
}
throw new RuntimeException("Illegal running state has occured. ");
}
public long getSplitTime() {
if (this.splitState != STATE_SPLIT) {
throw new IllegalStateException("Stopwatch must be split to get the split time. ");
}
return this.stopTime - this.startTime;
}
public long getLapTime() {
if (this.splitState != STATE_SPLIT) {
throw new IllegalStateException("Stopwatch must be split to get the lap time. ");
}
return System.currentTimeMillis() - this.stopTime;
}
public long getStartTime() {
if (this.runningState == STATE_UNSTARTED) {
throw new IllegalStateException("Stopwatch has not been started");
}
return this.startTime;
}
public String toString() {
return DurationFormatUtils.formatDurationHMS(getTime());
}
public String toSplitString() {
return DurationFormatUtils.formatDurationHMS(getSplitTime());
}
public String toLapString() {
return DurationFormatUtils.formatDurationHMS(getLapTime());
}
public StopWatch printString(String msg) {
System.out.println(msg + ": " + toString());
return this;
}
public StopWatch printSplitString(String msg) {
System.out.println(msg + ": " + toSplitString());
return this;
}
public StopWatch printLapString(String msg) {
System.out.println(msg + ": " + toLapString());
return this;
}
}