Mercurial > hg > blitz_stable
annotate src/org/dancres/jini/util/DiscoveryUtil.java @ 35:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
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0
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1 package org.dancres.jini.util; |
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2 |
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3 import java.lang.reflect.Field; |
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4 |
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5 import java.rmi.RemoteException; |
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6 |
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7 import net.jini.core.lookup.ServiceRegistrar; |
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8 import net.jini.core.lookup.ServiceTemplate; |
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9 import net.jini.core.lookup.ServiceMatches; |
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10 import net.jini.core.lookup.ServiceItem; |
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11 |
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12 import net.jini.core.entry.Entry; |
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13 |
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14 public class DiscoveryUtil { |
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15 public static void dumpRegistrar(ServiceRegistrar aRegistrar) |
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16 throws RemoteException { |
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17 |
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18 String[] myGroups = aRegistrar.getGroups(); |
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19 |
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20 System.out.println("Registrar ServiceID: " + |
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21 aRegistrar.getServiceID()); |
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22 System.out.print("Groups: "); |
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23 for (int i = 0; i < myGroups.length; i++) { |
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24 System.out.print(myGroups[i] + " "); |
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25 } |
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26 System.out.println(); |
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27 System.out.println("LookupLocator: " + aRegistrar.getLocator()); |
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28 } |
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29 |
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30 public static void dumpContents(ServiceRegistrar aRegistrar) |
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31 throws RemoteException { |
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32 |
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33 ServiceTemplate myWildcard = new ServiceTemplate(null, null, null); |
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34 |
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35 ServiceMatches myMatches = aRegistrar.lookup(myWildcard, |
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36 Integer.MAX_VALUE); |
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37 |
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38 System.out.println("Total services: " + myMatches.totalMatches); |
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39 |
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40 for (int i = 0; i < myMatches.totalMatches; i++) { |
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41 ServiceItem myItem = myMatches.items[i]; |
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42 Object myProxy = myItem.service; |
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43 |
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44 System.out.println("ServiceId: " + myItem.serviceID); |
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45 System.out.println("Type: " + myProxy.getClass()); |
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46 System.out.print("Interfaces: "); |
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47 dumpInterfaces(myProxy); |
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48 |
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49 System.out.println("Total attributes: " + |
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50 myItem.attributeSets.length); |
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51 |
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52 dump(myItem.attributeSets); |
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53 |
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54 System.out.println(); |
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55 } |
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56 } |
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57 |
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58 public static ServiceMatches |
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59 findServicesOfType(Class aClass, |
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60 ServiceRegistrar aRegistrar) |
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61 throws RemoteException { |
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62 |
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63 ServiceTemplate myTemplate = |
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64 new ServiceTemplate(null, new Class[] {aClass}, null); |
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65 |
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66 ServiceMatches myServices = aRegistrar.lookup(myTemplate, 255); |
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67 |
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68 return myServices; |
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69 } |
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70 |
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71 public static void dump(Entry[] aListOfEntries) { |
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72 for (int i = 0; i < aListOfEntries.length; i++) { |
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73 System.out.println(" " + aListOfEntries[i].getClass().getName()); |
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74 dump(aListOfEntries[i]); |
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75 } |
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76 } |
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77 |
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78 public static void dump(Entry anEntry) { |
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79 Field[] myFields = anEntry.getClass().getFields(); |
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80 |
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81 for (int i = 0; i < myFields.length; i++) { |
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82 |
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83 try { |
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84 Object myValue = myFields[i].get(anEntry); |
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85 |
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86 System.out.println(myFields[i].getType().getName() + " " + |
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87 myFields[i].getName() + " = " + myValue); |
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88 } catch (IllegalAccessException anE) { |
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89 System.out.println(myFields[i].getType().getName() + " " + |
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90 myFields[i].getName() + " = IllegalAccessException"); |
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91 } |
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92 } |
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93 } |
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94 |
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95 public static void dump(ServiceMatches aMatches) { |
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96 System.out.println("Found " + aMatches.totalMatches); |
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97 |
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98 for (int i = 0; i < aMatches.totalMatches; i++) { |
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99 System.out.println("ServiceID: " + |
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100 aMatches.items[i].serviceID + ", " + |
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101 aMatches.items[i].service); |
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102 System.out.print("Interfaces: "); |
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103 dumpInterfaces(aMatches.items[i].service.getClass()); |
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104 } |
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105 } |
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106 |
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107 public static void dump(ServiceItem anItem) { |
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108 System.out.println("ServiceID: " + |
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109 anItem.serviceID + ", " + anItem.service); |
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110 System.out.print("Interfaces: "); |
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111 dumpInterfaces(anItem.service.getClass()); |
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112 } |
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113 |
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114 public static boolean hasInterface(Object anObject, Class anInterface) { |
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115 |
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116 Class myCurrentClass = anObject.getClass(); |
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117 |
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118 while (myCurrentClass != null) { |
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119 Class[] myInterfaces = myCurrentClass.getInterfaces(); |
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120 |
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121 for (int j = 0; j < myInterfaces.length; j++) { |
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122 if (myInterfaces[j].equals(anInterface)) |
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123 return true; |
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124 } |
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125 |
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126 myCurrentClass = myCurrentClass.getSuperclass(); |
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127 } |
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128 |
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129 return false; |
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130 } |
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131 |
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132 public static void dumpInterfaces(Object anObject) { |
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133 dumpInterfaces(anObject.getClass()); |
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134 } |
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135 |
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136 public static void dumpInterfaces(Class aClass) { |
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137 |
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138 Class[] myInterfaces = aClass.getInterfaces(); |
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139 |
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140 for (int j = 0; j < myInterfaces.length; j++) { |
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141 System.out.print(myInterfaces[j].getName() + |
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142 "(" + myInterfaces[j].getClassLoader() + ")" + " "); |
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143 } |
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144 |
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145 if (aClass.getSuperclass() != null) |
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146 dumpInterfaces(aClass.getSuperclass()); |
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147 else |
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148 System.out.println(); |
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149 } |
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150 } |