1 /* |
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2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.management; |
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27 |
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28 import com.sun.management.GarbageCollectionNotificationInfo; |
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29 import com.sun.management.GcInfo; |
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30 import java.lang.reflect.Method; |
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31 import javax.management.openmbean.CompositeData; |
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32 import javax.management.openmbean.CompositeType; |
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33 import javax.management.openmbean.CompositeDataSupport; |
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34 import javax.management.openmbean.OpenDataException; |
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35 import javax.management.openmbean.OpenType; |
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36 import javax.management.openmbean.SimpleType; |
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37 import java.security.AccessController; |
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38 import java.security.PrivilegedAction; |
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39 import java.lang.reflect.Field; |
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40 import java.util.HashMap; |
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41 |
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42 /** |
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43 * A CompositeData for GarbageCollectionNotificationInfo for the local management support. |
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44 * This class avoids the performance penalty paid to the |
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45 * construction of a CompositeData use in the local case. |
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46 */ |
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47 public class GarbageCollectionNotifInfoCompositeData extends LazyCompositeData { |
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48 private final GarbageCollectionNotificationInfo gcNotifInfo; |
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49 |
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50 public GarbageCollectionNotifInfoCompositeData(GarbageCollectionNotificationInfo info) { |
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51 this.gcNotifInfo = info; |
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52 } |
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53 |
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54 public GarbageCollectionNotificationInfo getGarbageCollectionNotifInfo() { |
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55 return gcNotifInfo; |
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56 } |
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57 |
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58 public static CompositeData toCompositeData(GarbageCollectionNotificationInfo info) { |
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59 GarbageCollectionNotifInfoCompositeData gcnicd = |
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60 new GarbageCollectionNotifInfoCompositeData(info); |
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61 return gcnicd.getCompositeData(); |
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62 } |
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63 |
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64 private CompositeType getCompositeTypeByBuilder() { |
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65 final GcInfoBuilder builder = AccessController.doPrivileged (new PrivilegedAction<GcInfoBuilder>() { |
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66 public GcInfoBuilder run() { |
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67 try { |
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68 Class<?> cl = Class.forName("com.sun.management.GcInfo"); |
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69 Field f = cl.getDeclaredField("builder"); |
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70 f.setAccessible(true); |
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71 return (GcInfoBuilder)f.get(gcNotifInfo.getGcInfo()); |
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72 } catch(ClassNotFoundException | NoSuchFieldException | IllegalAccessException e) { |
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73 return null; |
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74 } |
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75 } |
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76 }); |
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77 CompositeType gict = null; |
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78 synchronized(compositeTypeByBuilder) { |
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79 gict = compositeTypeByBuilder.get(builder); |
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80 if(gict == null) { |
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81 OpenType<?>[] gcNotifInfoItemTypes = new OpenType<?>[] { |
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82 SimpleType.STRING, |
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83 SimpleType.STRING, |
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84 SimpleType.STRING, |
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85 builder.getGcInfoCompositeType(), |
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86 }; |
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87 try { |
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88 final String typeName = |
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89 "sun.management.GarbageCollectionNotifInfoCompositeType"; |
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90 gict = new CompositeType(typeName, |
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91 "CompositeType for GC notification info", |
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92 gcNotifInfoItemNames, |
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93 gcNotifInfoItemNames, |
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94 gcNotifInfoItemTypes); |
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95 compositeTypeByBuilder.put(builder,gict); |
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96 } catch (OpenDataException e) { |
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97 // shouldn't reach here |
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98 throw Util.newException(e); |
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99 } |
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100 } |
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101 } |
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102 return gict; |
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103 } |
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104 |
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105 protected CompositeData getCompositeData() { |
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106 // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH |
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107 // gcNotifInfoItemNames! |
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108 final Object[] gcNotifInfoItemValues; |
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109 gcNotifInfoItemValues = new Object[] { |
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110 gcNotifInfo.getGcName(), |
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111 gcNotifInfo.getGcAction(), |
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112 gcNotifInfo.getGcCause(), |
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113 GcInfoCompositeData.toCompositeData(gcNotifInfo.getGcInfo()) |
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114 }; |
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115 |
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116 CompositeType gict = getCompositeTypeByBuilder(); |
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117 |
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118 try { |
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119 return new CompositeDataSupport(gict, |
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120 gcNotifInfoItemNames, |
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121 gcNotifInfoItemValues); |
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122 } catch (OpenDataException e) { |
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123 // Should never reach here |
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124 throw new AssertionError(e); |
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125 } |
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126 } |
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127 |
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128 // private static MappedMXBeanType gcInfoMapType; |
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129 private static final String GC_NAME = "gcName"; |
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130 private static final String GC_ACTION = "gcAction"; |
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131 private static final String GC_CAUSE = "gcCause"; |
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132 private static final String GC_INFO = "gcInfo"; |
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133 private static final String[] gcNotifInfoItemNames = { |
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134 GC_NAME, |
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135 GC_ACTION, |
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136 GC_CAUSE, |
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137 GC_INFO |
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138 }; |
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139 private static HashMap<GcInfoBuilder,CompositeType> compositeTypeByBuilder = |
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140 new HashMap<>(); |
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141 |
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142 public static String getGcName(CompositeData cd) { |
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143 String gcname = getString(cd, GC_NAME); |
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144 if (gcname == null) { |
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145 throw new IllegalArgumentException("Invalid composite data: " + |
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146 "Attribute " + GC_NAME + " has null value"); |
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147 } |
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148 return gcname; |
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149 } |
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150 |
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151 public static String getGcAction(CompositeData cd) { |
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152 String gcaction = getString(cd, GC_ACTION); |
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153 if (gcaction == null) { |
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154 throw new IllegalArgumentException("Invalid composite data: " + |
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155 "Attribute " + GC_ACTION + " has null value"); |
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156 } |
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157 return gcaction; |
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158 } |
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159 |
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160 public static String getGcCause(CompositeData cd) { |
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161 String gccause = getString(cd, GC_CAUSE); |
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162 if (gccause == null) { |
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163 throw new IllegalArgumentException("Invalid composite data: " + |
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164 "Attribute " + GC_CAUSE + " has null value"); |
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165 } |
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166 return gccause; |
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167 } |
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168 |
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169 public static GcInfo getGcInfo(CompositeData cd) { |
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170 CompositeData gcInfoData = (CompositeData) cd.get(GC_INFO); |
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171 return GcInfo.from(gcInfoData); |
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172 } |
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173 |
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174 /** Validate if the input CompositeData has the expected |
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175 * CompositeType (i.e. contain all attributes with expected |
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176 * names and types). |
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177 */ |
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178 public static void validateCompositeData(CompositeData cd) { |
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179 if (cd == null) { |
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180 throw new NullPointerException("Null CompositeData"); |
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181 } |
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182 |
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183 if (!isTypeMatched( getBaseGcNotifInfoCompositeType(), cd.getCompositeType())) { |
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184 throw new IllegalArgumentException( |
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185 "Unexpected composite type for GarbageCollectionNotificationInfo"); |
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186 } |
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187 } |
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188 |
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189 // This is only used for validation. |
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190 private static CompositeType baseGcNotifInfoCompositeType = null; |
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191 private static synchronized CompositeType getBaseGcNotifInfoCompositeType() { |
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192 if (baseGcNotifInfoCompositeType == null) { |
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193 try { |
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194 OpenType<?>[] baseGcNotifInfoItemTypes = new OpenType<?>[] { |
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195 SimpleType.STRING, |
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196 SimpleType.STRING, |
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197 SimpleType.STRING, |
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198 GcInfoCompositeData.getBaseGcInfoCompositeType() |
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199 }; |
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200 baseGcNotifInfoCompositeType = |
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201 new CompositeType("sun.management.BaseGarbageCollectionNotifInfoCompositeType", |
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202 "CompositeType for Base GarbageCollectionNotificationInfo", |
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203 gcNotifInfoItemNames, |
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204 gcNotifInfoItemNames, |
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205 baseGcNotifInfoItemTypes); |
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206 } catch (OpenDataException e) { |
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207 // shouldn't reach here |
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208 throw Util.newException(e); |
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209 } |
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210 } |
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211 return baseGcNotifInfoCompositeType; |
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212 } |
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213 |
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214 private static final long serialVersionUID = -1805123446483771292L; |
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215 } |
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