| /* |
| * 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.geode.internal.util; |
| |
| |
| /** Stop watch for measuring elapsed time. Not thread-safe. */ |
| public class StopWatch { |
| |
| private long startTime; |
| private long stopTime; |
| |
| /** Constructs a StopWatch which has not yet been started */ |
| public StopWatch() { |
| this(false); |
| } |
| |
| /** @param start true if new StopWatch should automatically start */ |
| public StopWatch(boolean start) { |
| if (start) { |
| start(); |
| } |
| } |
| |
| /** |
| * Returns the elapsed time in millis since starting. Value is final once stopped. |
| */ |
| public long elapsedTimeMillis() { |
| if (this.stopTime == 0) { |
| return System.currentTimeMillis() - this.startTime; |
| } else { |
| return this.stopTime - this.startTime; |
| } |
| } |
| |
| /** Start the stop watch */ |
| public void start() { |
| this.startTime = System.currentTimeMillis(); |
| this.stopTime = 0; |
| } |
| |
| /** Stop the stop watch */ |
| public void stop() { |
| if (!isRunning()) { |
| throw new IllegalStateException( |
| "Attempted to stop non-running StopWatch"); |
| } |
| this.stopTime = System.currentTimeMillis(); |
| } |
| |
| /** Returns true if stop watch is currently running */ |
| public boolean isRunning() { |
| return this.startTime > 0 && this.stopTime == 0; |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuffer sb = new StringBuffer("[StopWatch: "); |
| sb.append("startTime=").append(this.startTime); |
| sb.append(", stopTime=").append(this.stopTime); |
| sb.append(", isRunning=").append(isRunning()); |
| sb.append("]"); |
| return sb.toString(); |
| } |
| } |