1 /*

     2  * Copyright (c) 2014, 2016, 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.test.lib.wrappers;

    25 

    26 import java.util.Objects;

    27 

    28 /**

    29  * Class which runs another Runnable in infinite loop with certain pauses

    30  * between cycles.

    31  */

    32 public class InfiniteLoop implements Runnable {

    33     private final Runnable target;

    34     private final long mills;

    35 

    36 

    37     /**

    38      * @param target a target to run in a loop

    39      * @param mills  the length of pause time in milliseconds

    40      * @throws NullPointerException if target is null

    41      * @throws IllegalArgumentException if the value of millis is negative

    42      */

    43     public InfiniteLoop(Runnable target, long mills) {

    44         Objects.requireNonNull(target);

    45         if (mills < 0) {

    46             throw new IllegalArgumentException("mills < 0");

    47         }

    48         this.target = target;

    49         this.mills = mills;

    50     }

    51 

    52     @Override

    53     public void run() {

    54         try {

    55             while (true) {

    56                 target.run();

    57                 if (mills > 0) {

    58                     Thread.sleep(mills);

    59                 }

    60             }

    61         } catch (InterruptedException e) {

    62             Thread.currentThread().interrupt();

    63             throw new Error(e);

    64         }

    65     }

    66 }