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The source code// $Header: /home/cvs/jakarta-jmeter/src/jorphan/org/apache/jorphan/timer/ITimer.java,v 1.3 2004/02/11 23:57:23 sebb Exp $ /* * Copyright 2002-2004 The Apache Software Foundation. * * 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.apache.jorphan.timer; /** * A simple interface for measuring time intervals. An instance of this goes * through the following lifecycle states: *
* If this library has been compiled with * {@link ITimerConstants#DO_STATE_CHECKS} set to 'true' the implementation * will enforce this lifecycle model and throw IllegalStateException when it * is violated. * * @author Vlad Roubtsov * @author Originally published in JavaWorld * @version $Revision: 1.3 $ */ public interface ITimer { /** * Starts a new time interval and advances this timer instance to 'started' * state. This method can be called from 'ready' state only. */ void start (); /** * Terminates the current time interval and advances this timer instance to * 'stopped' state. Interval duration will be available via * {@link #getDuration()} method. This method can be called from 'started' * state only. */ void stop (); /** * Returns the duration of the time interval that elapsed between the last * calls to {@link #start()} and {@link #stop()}. This method can be called * any number of times from 'stopped' state and will return the same value * each time. * * @return interval duration in milliseconds */ double getDuration (); /** * This method can be called from any state and will reset this timer * instance back to 'ready' state. */ void reset (); } |
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