Mercurial > hg > blitz_stable

annotate src/org/dancres/blitz/remote/LookupData.java @ 32:243c74d599bf

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author Dan Creswell <dan.creswell@gmail.com>
date Sat, 12 Jun 2010 10:41:47 +0100
parents 3dc0c5604566
children
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0
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1 package org.dancres.blitz.remote;
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2
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3 import java.io.Serializable;
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4 import java.io.IOException;
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5
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6 import java.util.ArrayList;
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7
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8 import java.util.logging.Level;
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9 import java.util.logging.Logger;
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10
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11 import net.jini.core.entry.Entry;
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12
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13 import net.jini.core.discovery.LookupLocator;
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14
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15 import net.jini.id.Uuid;
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16 import net.jini.id.UuidFactory;
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17
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18 import net.jini.core.lookup.ServiceID;
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19
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20 import net.jini.config.ConfigurationException;
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21 import net.jini.config.Configuration;
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22 import net.jini.config.NoSuchEntryException;
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23
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24 import net.jini.lookup.JoinManager;
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25
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26 import net.jini.discovery.DiscoveryManagement;
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27 import net.jini.discovery.DiscoveryLocatorManagement;
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28 import net.jini.discovery.DiscoveryGroupManagement;
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29 import net.jini.discovery.LookupDiscoveryManager;
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30
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31 import java.rmi.MarshalledObject;
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32
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33 import org.dancres.blitz.config.ConfigurationFactory;
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34
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35 import org.dancres.blitz.Logging;
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36
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37 /**
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38 All data related to join management is held in this class.
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39 Objects of this class are persisted to disk whenever their state
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40 is updated and used to restore join management information next time
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41 the service is run. LookupStorage delegates most of it's method calls
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42 to this class.
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43 */
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44 class LookupData implements Serializable {
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45 private static Logger theLogger =
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46 Logging.newLogger("org.dancres.blitz.remote.LookupData");
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47
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48 static final long serialVersionUID = -6636356018279188568L;
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49
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50 private String[] theGroups;
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51 private MarshalledObject theAttributes;
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52 private LookupLocator[] theLocators;
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53
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54 private Uuid theUuid;
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55
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56 /*
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57 No need to save this to disk it's derived from theUuid
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58 */
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59 private transient ServiceID theServiceId;
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60
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61 private transient Entry[] theStdAttrs;
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62
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63 LookupData() {
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64 }
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65
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66 /**
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67 Invoked the first time the service is exported. The initial
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68 state is recovered from the Configuration file and then persisted
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69 to disk. After that, the config file is only used to locate the
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70 saved state which is then used in preference to the config file
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71 for all join management related data.
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72 */
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73 void init(Configuration aConfig) throws ConfigurationException {
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74 initAttrs(aConfig);
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75 initGroups(aConfig);
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76 initLocators(aConfig);
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77 initUuid(aConfig);
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78 }
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79
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80 void initAttrs(Configuration aConfig) throws ConfigurationException {
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81 Entry[] myUserAttrs = new Entry[0];
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82
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83 try {
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84 myUserAttrs =
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85 (Entry[])
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86 aConfig.getEntry(ConfigurationFactory.BLITZ_MODULE,
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87 "initialAttrs",
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88 Entry[].class);
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89 } catch (NoSuchEntryException aNSEE) {
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90 } catch (Throwable aT) {
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91 throw new ConfigurationException("Failed to load initAttrs",
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92 aT);
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93 }
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94
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95 try {
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96 theAttributes = new MarshalledObject(myUserAttrs);
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97 } catch (IOException anIOE) {
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98 throw new ConfigurationException("Failed to store attributes",
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99 anIOE);
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100 }
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101 }
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102
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103 void initGroups(Configuration aConfig) throws ConfigurationException {
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104 theGroups = (String[])
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105 aConfig.getEntry(ConfigurationFactory.BLITZ_MODULE,
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106 "initialGroups",
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107 String[].class,
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108 null);
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109 }
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110
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111 void initLocators(Configuration aConfig) throws ConfigurationException {
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112 theLocators =
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113 (LookupLocator[])
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114 aConfig.getEntry(ConfigurationFactory.BLITZ_MODULE,
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115 "initialLocators",
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116 LookupLocator[].class,
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117 new LookupLocator[0]);
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118 }
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119
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120 void initUuid(Configuration aConfig) throws ConfigurationException {
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121 theUuid = UuidFactory.generate();
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122 }
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123
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124 /**
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125 Update our state from the JoinManager instance passed in.
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126 */
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127 void update(JoinManager aMgr) throws IOException {
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128 theGroups = getDGM(aMgr).getGroups();
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129 theLocators = getDLM(aMgr).getLocators();
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130 theAttributes = new MarshalledObject(aMgr.getAttributes());
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131 }
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132
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133 private boolean ignore(Entry anAttr) {
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134 for (int i = 0; i < theStdAttrs.length; i++) {
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135 if (anAttr.getClass().equals(theStdAttrs[i].getClass())) {
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136 return true;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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137 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
138 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
139
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Dan Creswell <dan.creswell@gmail.com>
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diff changeset
140 return false;
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
141 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
142
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Dan Creswell <dan.creswell@gmail.com>
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diff changeset
143 private DiscoveryGroupManagement getDGM(JoinManager aMgr) {
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144 return (DiscoveryGroupManagement) aMgr.getDiscoveryManager();
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145 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
146
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Dan Creswell <dan.creswell@gmail.com>
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diff changeset
147 private DiscoveryLocatorManagement getDLM(JoinManager aMgr) {
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148 return (DiscoveryLocatorManagement) aMgr.getDiscoveryManager();
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149 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
150
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
151 void dump() {
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152 theLogger.log(Level.INFO, "ServiceID: " + getServiceID());
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153 theLogger.log(Level.INFO, "Groups: ");
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154 if (theGroups == null)
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
155 theLogger.log(Level.INFO, "All groups");
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Dan Creswell <dan.creswell@gmail.com>
parents:
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156 else {
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Dan Creswell <dan.creswell@gmail.com>
parents:
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157 for (int i = 0; i < theGroups.length; i++) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
158 theLogger.log(Level.INFO, theGroups[i]);
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Dan Creswell <dan.creswell@gmail.com>
parents:
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159 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
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160 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
161
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
162 theLogger.log(Level.INFO, "Locators: ");
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Dan Creswell <dan.creswell@gmail.com>
parents:
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163 if ((theLocators == null) || (theLocators.length == 0))
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
164 theLogger.log(Level.INFO, "None");
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Dan Creswell <dan.creswell@gmail.com>
parents:
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165 else {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
166 for (int i = 0; i < theLocators.length; i++) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
167 theLogger.log(Level.INFO, theLocators[i].toString());
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Dan Creswell <dan.creswell@gmail.com>
parents:
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168 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
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169 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
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170 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
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171
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Dan Creswell <dan.creswell@gmail.com>
parents:
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172 Entry[] getAttributes() throws IOException {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
173 try {
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Dan Creswell <dan.creswell@gmail.com>
parents:
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174 if (theStdAttrs == null) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
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175 String myName = null;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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176
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
177 try {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
178 myName =
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parents:
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179 (String)
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parents:
diff changeset
180 ConfigurationFactory.getEntry("name", String.class);
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parents:
diff changeset
181 } catch (NoSuchEntryException aNSEE) {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
182 // Doesn't matter
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Dan Creswell <dan.creswell@gmail.com>
parents:
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183 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
184
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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185 theStdAttrs = BlitzProxy.getDefaultAttrs(myName);
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Dan Creswell <dan.creswell@gmail.com>
parents:
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186 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
187
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
188 Entry[] myAttrs = (Entry[]) theAttributes.get();
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parents:
diff changeset
189
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
190 ArrayList mySaveable = new ArrayList();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
191
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
192 for (int i = 0; i < myAttrs.length; i++) {
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parents:
diff changeset
193 Entry myAttr = myAttrs[i];
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
194
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
195 if (! ignore(myAttr))
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
196 mySaveable.add(myAttr);
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Dan Creswell <dan.creswell@gmail.com>
parents:
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197 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
198
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
199 myAttrs = new Entry[mySaveable.size()];
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parents:
diff changeset
200
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
201 myAttrs = (Entry[]) mySaveable.toArray(myAttrs);
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
202
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
203
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
204 Entry[] myMergedAttrs = new Entry[myAttrs.length +
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
205 theStdAttrs.length];
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
206
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
207 System.arraycopy(theStdAttrs, 0, myMergedAttrs, 0,
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
208 theStdAttrs.length);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
209 System.arraycopy(myAttrs, 0, myMergedAttrs,
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
210 theStdAttrs.length, myAttrs.length);
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
211
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
212 myAttrs = myMergedAttrs;
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
213
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
214 return myAttrs;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
215 } catch (Exception anE) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
216 IOException myIOE =
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
217 new IOException("Failed to restore attributes");
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
218 myIOE.initCause(anE);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
219 throw myIOE;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
220 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
221 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
222
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
223 DiscoveryManagement getLookupDiscovery()
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
224 throws ConfigurationException {
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
225 try {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
226 return new LookupDiscoveryManager(theGroups, theLocators,
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
227 null);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
228 } catch (IOException anIOE) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
229 BlitzServiceImpl.theLogger.log(Level.SEVERE,
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
230 "Got IO problems from LDM",
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
231 anIOE);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
232 throw new ConfigurationException("IO exception in LDM", anIOE);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
233 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
234 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
235
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
236 Uuid getUuid() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
237 return theUuid;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
238 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
239
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
240 synchronized ServiceID getServiceID() {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
241 if (theServiceId == null) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
242 theServiceId =
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
243 new ServiceID(theUuid.getMostSignificantBits(),
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
244 theUuid.getLeastSignificantBits());
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
245 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
246
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
247 return theServiceId;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
248 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
249 }