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 double factor; 36 private final Callable<Boolean> target; 37 38 /** 39 * @param timeout a timeout. zero means no time limitation 40 * @param factor a multiplier used to estimate next iteration time 41 * @param target a target to run 42 * @throws NullPointerException if target is null 43 * @throws IllegalArgumentException if timeout is negative or 44 factor isn't positive 45 */ 46 public TimeLimitedRunner(long timeout, double factor, 47 Callable<Boolean> target) { 48 Objects.requireNonNull(target, "target must not be null"); 49 if (timeout < 0) { 50 throw new IllegalArgumentException("timeout[" + timeout + "] < 0"); 51 } 52 if (factor <= 0d) { 53 throw new IllegalArgumentException("factor[" + factor + "] <= 0"); 54 } 55 this.stoptime = System.currentTimeMillis() + timeout; 56 this.timeout = timeout; 57 this.factor = factor; 58 this.target = target; 59 } 60 61 /** 62 * Runs @{linkplan target} while it returns true and timeout isn't exceeded 63 */ 64 @Override 65 public Void call() throws Exception { 66 long maxDuration = 0L; 67 long iterStart = System.currentTimeMillis(); 68 if (timeout != 0 && iterStart > stoptime) { 69 return null; 70 } 71 while (target.call()) { 72 if (timeout != 0) { 73 long iterDuration = System.currentTimeMillis() - iterStart; 74 maxDuration = Math.max(maxDuration, iterDuration); 75 iterStart = System.currentTimeMillis(); 76 if (iterStart + (maxDuration * factor) > stoptime) { 77 System.out.println("Not enough time to continue execution. " 78 + "Interrupted."); 79 break; 80 } 81 } 82 } 83 return null; 84 } 85 86 }