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 package com.oracle.java.testlibrary; 24 25 /** 26 * Simple class to check writability, invalid and valid values for concrete VMOption 27 */ 28 public class TestDynamicVMOption { 29 30 public static final String MIN_FREE_RATIO_FLAG_NAME = "MinHeapFreeRatio"; 31 public static final String MAX_FREE_RATIO_FLAG_NAME = "MaxHeapFreeRatio"; 32 33 private final String name; 34 private final int value; 35 36 /** 37 * Constructor 38 * 39 * @param name of VM option to test 40 */ 41 public TestDynamicVMOption(String name) { 42 this.name = name; 43 this.value = DynamicVMOptionChecker.getIntValue(name); 44 System.out.println(this.name + " = " + this.value); 45 } 46 47 /** 48 * Checks that this value can accept valid percentage values and cannot accept invalid percentage values 49 * 50 * @throws RuntimeException 51 */ 52 public void testPercentageValues() { 53 checkInvalidValue(Integer.toString(Integer.MIN_VALUE)); 54 checkInvalidValue(Integer.toString(Integer.MAX_VALUE)); 55 checkInvalidValue("-10"); 56 checkInvalidValue("190"); 57 } 58 59 /** 60 * Reads VM option from PlatformMXBean and parse it to integer value 61 * 62 * @return value 63 */ 64 public int getIntValue() { 65 return DynamicVMOptionChecker.getIntValue(this.name); 66 } 67 68 /** 69 * Sets VM option value 70 * 71 * @param value to set 72 */ 73 public void setIntValue(int value) { 74 DynamicVMOptionChecker.setIntValue(this.name, value); 75 } 76 77 /** 78 * Checks that this VM option is dynamically writable 79 * 80 * @throws RuntimeException if option if not writable 81 * @return true 82 */ 83 public boolean checkIsWritable() throws RuntimeException { 84 return DynamicVMOptionChecker.checkIsWritable(this.name); 85 } 86 87 /** 88 * Checks that value for this VM option cannot be set 89 * 90 * @param value to check 91 * @throws RuntimeException on error - when expected exception hasn't been thrown 92 */ 93 public void checkInvalidValue(String value) { 94 DynamicVMOptionChecker.checkInvalidValue(this.name, value); 95 } 96 97 /** 98 * Checks that value for this VM option can be set 99 * 100 * @param value to check 101 * @throws RuntimeException on error - when value in VM is not equal to origin 102 */ 103 public void checkValidValue(String value) { 104 DynamicVMOptionChecker.checkValidValue(this.name, value); 105 } 106 107 }