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/*******************************************************************************
* Copyright (c) 2002, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.cheatsheets;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.Platform;
public class CheatSheetStopWatch {
private static CheatSheetStopWatch stopWatch = null;
private Map<String, Entry> table;
private CheatSheetStopWatch() {
}
public static CheatSheetStopWatch getInstance() {
if(stopWatch == null) {
stopWatch = new CheatSheetStopWatch();
}
return stopWatch;
}
public void start(String key) {
Entry entry = getEntry(key);
if (entry == null) {
entry = new Entry();
putEntry(key, entry);
} else {
resetEntry(entry);
}
entry.start = System.currentTimeMillis();
}
public void stop(String key) {
Entry entry = getEntry(key);
entry.stop = System.currentTimeMillis();
}
public long totalElapsedTime(String key) {
Entry entry = getEntry(key);
return entry.stop - entry.start;
}
public void lapTime(String key) {
Entry entry = getEntry(key);
if(entry.currentLap == -1) {
entry.previousLap = entry.start;
} else {
entry.previousLap = entry.currentLap;
}
entry.currentLap = System.currentTimeMillis();
}
public long elapsedTime(String key) {
Entry entry = getEntry(key);
return entry.currentLap - entry.previousLap;
}
/**
* Contains the data for an entry in the stopwatch.
*/
private static class Entry {
protected long start = -1;
protected long stop = -1;
protected long currentLap = -1;
protected long previousLap = -1;
}
private Entry getEntry(String key) {
return getTable().get(key);
}
private void putEntry(String key, Entry entry) {
getTable().put(key, entry);
}
private void resetEntry(Entry entry) {
entry.start = -1;
entry.stop = -1;
entry.currentLap = -1;
entry.previousLap = -1;
}
private Map<String, Entry> getTable() {
if (table == null) {
table = new HashMap<>(10);
}
return table;
}
public static boolean isTracing() {
if (CheatSheetPlugin.getPlugin().isDebugging()) {
String traceTimes = Platform.getDebugOption("org.eclipse.ui.cheatsheets/trace/creation/times"); //$NON-NLS-1$
if (traceTimes != null && traceTimes.equalsIgnoreCase("true")) { //$NON-NLS-1$
return true;
}
}
return false;
}
public static void startStopWatch(String key) {
if(isTracing()) {
getInstance().start(key);
}
}
public static void printTotalTime(String key, String message) {
if(isTracing()) {
getInstance().stop(key);
System.out.print(message);
System.out.println(getInstance().totalElapsedTime(key));
}
}
public static void printLapTime(String key, String message) {
if(isTracing()) {
getInstance().lapTime(key);
System.out.print(message);
System.out.println(getInstance().elapsedTime(key));
}
}
}
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