001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018 package org.apache.commons.monitoring.stopwatches; 019 020 /** 021 * Instrumentation tool to compute resource consumption of some code fragment execution. 022 * <p/> 023 * StopWatch implementation is supposed not to be thread-safe and to be a one-shot tool. Don't 024 * share it beetween threads, don't try to reuse it. 025 * 026 * @author <a href="mailto:nicolas@apache.org">Nicolas De Loof</a> 027 */ 028 public interface StopWatch { 029 long getElapsedTime(); 030 031 StopWatch stop(); 032 }