1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package jdk.testlibrary; 25 26 import java.util.Objects; 27 import java.util.concurrent.Callable; 28 29 /** 30 * Auxiliary class to run target w/ given timeout. 31 */ 32 public class TimeLimitedRunner implements Callable<Void> { 33 private final long stoptime; 34 private final long timeout; 35 private final Callable<Boolean> target; 36 37 /** 38 * @param timeout a timeout. zero means no time limitation 39 * @param target a target to run 40 * @throws NullPointerException if target is null 41 * @throws IllegalArgumentException if timeout is negative 42 */ 43 public TimeLimitedRunner(long timeout, Callable<Boolean> target) { 44 Objects.requireNonNull(target, "target must not be null"); 45 if (timeout < 0) { 46 throw new IllegalArgumentException("timeout[" + timeout + "] < 0"); 47 } 48 this.stoptime = System.currentTimeMillis() + timeout; 49 this.timeout = timeout; 50 this.target = target; 51 } 52 53 /** 54 * Runs @{linkplan target} while it returns true and timeout isn't exceeded 55 */ 56 @Override 57 public Void call() throws Exception { 58 long maxDuration = 0L; 59 long iterStart = System.currentTimeMillis(); 60 if (timeout != 0 && iterStart > stoptime) { 61 return null; 62 } 63 while (target.call()) { 64 if (timeout != 0) { 65 long iterDuration = System.currentTimeMillis() - iterStart; 66 maxDuration = Math.max(maxDuration, iterDuration); 67 iterStart = System.currentTimeMillis(); 68 if (iterStart + (maxDuration << 1) > stoptime) { 69 System.out.println("Not enough time to continue execution. " 70 + "Interrupted."); 71 break; 72 } 73 } 74 } 75 return null; 76 } 77 78 }