1 /* 2 * Copyright (c) 2016, 2018, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package jdk.management.jfr; 26 27 import java.lang.management.ManagementPermission; 28 import java.security.Permission; 29 import java.time.DateTimeException; 30 import java.time.Duration; 31 import java.time.Instant; 32 import java.time.format.DateTimeParseException; 33 import java.util.List; 34 import java.util.function.Function; 35 import java.util.stream.Collectors; 36 37 import javax.management.MalformedObjectNameException; 38 import javax.management.ObjectName; 39 40 import jdk.jfr.internal.management.ManagementSupport; 41 42 final class MBeanUtils { 43 44 private static final Permission monitor = new ManagementPermission("monitor"); 45 private static final Permission control = new ManagementPermission("control"); 46 47 static ObjectName createObjectName() { 48 try { 49 return new ObjectName(FlightRecorderMXBean.MXBEAN_NAME); 50 } catch (MalformedObjectNameException mne) { 51 throw new Error("Can't happen", mne); 52 } 53 } 54 55 static void checkControl() { 56 SecurityManager secManager = System.getSecurityManager(); 57 if (secManager != null) { 58 secManager.checkPermission(control); 59 } 60 } 61 62 static void checkMonitor() { 63 SecurityManager secManager = System.getSecurityManager(); 64 if (secManager != null) { 65 secManager.checkPermission(monitor); 66 } 67 } 68 69 static <T, R> List<R> transformList(List<T> source, Function<T, R> function) { 70 return source.stream().map(function).collect(Collectors.toList()); 71 } 72 73 static boolean booleanValue(String s) { 74 if ("true".equals(s)) { 75 return true; 76 } 77 if ("false".equals(s)) { 78 return false; 79 } 80 throw new IllegalArgumentException("Value must be true or false."); 81 } 82 83 static Duration duration(String s) throws NumberFormatException { 84 if (s == null) { 85 return null; 86 } 87 long l = ManagementSupport.parseTimespan(s); 88 if (l == 0) { 89 return null; 90 } 91 return Duration.ofNanos(l); 92 } 93 94 public static Instant parseTimestamp(String s, Instant defaultValue) { 95 if (s == null) { 96 return defaultValue; 97 } 98 try { 99 return Instant.parse(s); 100 } catch(DateTimeParseException e ) { 101 // OK, try with milliseconds since epoch 102 // before giving up. 103 } 104 try { 105 return Instant.ofEpochMilli(Long.parseLong(s)); 106 } catch (NumberFormatException | DateTimeException nfr) { 107 throw new IllegalArgumentException("Not a valid timestamp " + s); 108 } 109 } 110 111 static Long size(String s) throws NumberFormatException { 112 long size = Long.parseLong(s); 113 if (size < 0) { 114 throw new IllegalArgumentException("Negative size not allowed"); 115 } 116 return size; 117 } 118 119 public static int parseBlockSize(String string, int defaultSize) { 120 if (string == null) { 121 return defaultSize; 122 } 123 int size = Integer.parseInt(string); 124 if (size <1) { 125 throw new IllegalArgumentException("Block size must be at least 1 byte"); 126 } 127 return size; 128 } 129 } 130