Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/entry/EntryStorage.java @ 33:0b9265358617
Added tag 2.1.1 for changeset a77f0a9ed93c
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:52:10 +0100 |
parents | 3dc0c5604566 |
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0
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1 package org.dancres.blitz.entry; |
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2 |
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3 import java.io.IOException; |
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4 import java.io.FileNotFoundException; |
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5 |
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6 import java.util.logging.*; |
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7 |
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8 import java.util.ArrayList; |
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9 |
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10 import com.sleepycat.je.*; |
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11 |
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12 import net.jini.config.ConfigurationException; |
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13 |
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14 import org.dancres.blitz.mangler.MangledField; |
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15 import org.dancres.blitz.mangler.MangledEntry; |
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16 |
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17 import org.dancres.util.BytePacker; |
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18 |
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19 import org.dancres.blitz.Logging; |
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20 |
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21 import org.dancres.util.ObjectTransformer; |
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22 |
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23 import org.dancres.blitz.meta.RegistryFactory; |
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24 import org.dancres.blitz.meta.Registry; |
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25 |
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26 import org.dancres.blitz.entry.ci.CacheIndexer; |
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27 |
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28 import org.dancres.blitz.disk.DiskTxn; |
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29 import org.dancres.blitz.disk.Disk; |
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30 import org.dancres.blitz.disk.RetryingUpdate; |
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31 import org.dancres.blitz.disk.RetryableOperation; |
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32 |
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33 import org.dancres.blitz.oid.Allocator; |
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34 import org.dancres.blitz.oid.AllocatorFactory; |
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35 import org.dancres.blitz.oid.OID; |
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36 import org.dancres.blitz.oid.OIDFactory; |
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37 |
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38 import org.dancres.blitz.cache.Identifiable; |
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39 import org.dancres.blitz.cache.Identifier; |
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40 |
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41 import org.dancres.blitz.config.Fifo; |
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42 import org.dancres.blitz.config.ReadAhead; |
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43 import org.dancres.blitz.config.EntryConstraints; |
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44 |
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45 import org.dancres.blitz.stats.StatsBoard; |
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46 import org.dancres.blitz.stats.FieldsStat; |
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47 |
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48 /** |
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49 <p>Used to maintain all Entry instances of a particular type but does not |
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50 include "java.lang.Object". "java.lang.Object" is considered the root |
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51 node for internal implementation purposes. Storage requirements associated |
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52 with this Entry type are handled by RootStorage.</p> |
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53 |
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54 <p>MetaDB contains a list of known sub-types, a set of KeyIndex instances. |
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55 </p> |
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56 |
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57 @see org.dancres.blitz.entry.RootStorage |
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58 */ |
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59 class EntryStorage implements Storage, EntryEditor { |
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60 /* |
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61 Used in searching to indicate various results |
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62 */ |
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63 |
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64 /** |
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65 Indicates a particular search field was null and therefore wildcard |
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66 and thus doesn't filter matches |
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67 */ |
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68 private static final int WAS_NULL = -1; |
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69 |
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70 /** |
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71 Indicates a field was not wildcard and thus filters matches but |
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72 when queries produced no hits |
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73 */ |
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74 private static final int NO_HITS = -2; |
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75 |
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76 static Logger theLogger = |
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77 Logging.newLogger("org.dancres.blitz.disk.Storage"); |
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78 |
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79 private String theType; |
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80 |
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81 /** |
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82 Duplicate keys not allowed in the main database |
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83 */ |
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84 private Database theMainDb; |
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85 |
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86 private Registry theMetaData; |
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87 |
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88 private ArrayList theSubtypes = new ArrayList(); |
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89 private String[] theCurrentSubtypes = new String[0]; |
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90 |
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91 private KeyIndex[] theIndexes; |
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92 |
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93 private boolean noSchemaDefined = false; |
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94 |
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95 private Allocator theAllocator; |
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96 |
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97 private WriteScheduler theWriteScheduler; |
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98 |
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99 private CacheIndexer theIndexer; |
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100 |
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101 private LeaseTracker theTracker; |
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102 |
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103 private EntryConstraints theConstraints; |
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104 |
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105 EntryStorage(String aType) { |
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106 theType = aType; |
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107 } |
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108 |
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109 public String getType() { |
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110 return theType; |
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111 } |
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112 |
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113 public String getName() { |
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114 return theType; |
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115 } |
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116 |
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117 /** |
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118 Used for debug purposes |
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119 */ |
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120 public String toString() { |
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121 return theType; |
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122 } |
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123 |
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124 public TupleLocator findCached(MangledEntry anEntry) { |
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125 return null; |
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126 |
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127 // return theIndexer.find(anEntry); |
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128 } |
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129 |
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130 public boolean init(boolean mustExist) throws IOException { |
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131 if (mustExist) { |
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132 if (! Disk.dbExists(theType)) { |
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133 return false; |
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134 } |
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135 } |
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136 |
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137 try { |
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138 theConstraints = EntryConstraints.getConstraints(theType); |
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139 } catch (ConfigurationException aCE) { |
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140 IOException myIOE = new IOException("Failed to load constraints"); |
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141 myIOE.initCause(aCE); |
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142 throw myIOE; |
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143 } |
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144 |
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145 |
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146 theWriteScheduler = new WriteScheduler((EntryEditor) this); |
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147 |
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148 theIndexer = |
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149 CacheIndexer.newIndexer(theType, theConstraints); |
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150 |
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151 try { |
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152 theMetaData = RegistryFactory.get(theType, null); |
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153 |
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154 DatabaseConfig myConfig = new DatabaseConfig(); |
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155 myConfig.setAllowCreate(true); |
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156 |
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157 theMainDb = Disk.newDb(null, theType, myConfig); |
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158 |
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159 /* |
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160 If there are no index elements, we've not been created |
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161 explicitly previously. We may have been implicitly created |
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162 whilst modelling inheritance hierarchy but that doesn't count |
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163 */ |
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164 DiskTxn myTxn = DiskTxn.newStandalone(); |
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165 |
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166 try { |
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167 byte[] myIndexInfo = |
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168 theMetaData.getAccessor(myTxn).loadRaw(FixedOIDs.INDEXES_KEY); |
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169 |
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170 if (myIndexInfo == null) { |
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171 noSchemaDefined = true; |
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172 } else { |
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173 loadIndexes(myIndexInfo); |
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174 } |
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175 } finally { |
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176 myTxn.commit(); |
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177 } |
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178 |
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179 myTxn = DiskTxn.newStandalone(); |
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180 |
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181 try { |
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182 byte[] mySubtypeInfo = |
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183 theMetaData.getAccessor(myTxn).loadRaw(FixedOIDs.SUBTYPES_KEY); |
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184 |
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185 if (mySubtypeInfo != null) { |
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186 theSubtypes =(ArrayList) |
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187 ObjectTransformer.toObject(mySubtypeInfo); |
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188 String[] myTypes = new String[theSubtypes.size()]; |
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189 |
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190 theCurrentSubtypes = |
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191 (String[]) theSubtypes.toArray(myTypes); |
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192 } |
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193 } finally { |
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194 myTxn.commit(); |
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195 } |
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196 |
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197 } catch (FileNotFoundException aFNFE) { |
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198 theLogger.log(Level.SEVERE, "Couldn't open type db", aFNFE); |
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199 throw new IOException("Couldn't open type db"); |
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200 } catch (DatabaseException aDbe) { |
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201 theLogger.log(Level.SEVERE, "Got Dbe", aDbe); |
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202 throw new IOException("Dbe"); |
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203 } |
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204 |
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205 // Initialize Allocator |
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206 // |
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207 if (theConstraints.get(Fifo.class) != null) |
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208 theAllocator = AllocatorFactory.get(theType, true); |
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209 else |
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210 theAllocator = AllocatorFactory.get(theType, false); |
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211 |
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212 // Initialize LeaseTracker |
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213 theTracker = |
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214 LeaseTrackerFactory.getTracker(theType, theAllocator); |
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215 |
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216 return true; |
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217 } |
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218 |
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219 public int getNumEntries() throws IOException { |
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220 if (theMainDb == null) |
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221 return 0; |
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222 |
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223 try { |
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224 StatsConfig myConfig = new StatsConfig(); |
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225 myConfig.setFast(false); |
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226 |
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227 BtreeStats myStats = (BtreeStats) theMainDb.getStats(myConfig); |
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228 return (int) myStats.getLeafNodeCount(); |
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229 } catch (DatabaseException aDbe) { |
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230 theLogger.log(Level.SEVERE, "Couldn't read num entries from Db", |
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231 aDbe); |
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232 throw new IOException("Dbe"); |
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233 } |
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234 } |
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235 |
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236 public synchronized void addSubtype(String aType) throws IOException { |
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237 if (! theSubtypes.contains(aType)) { |
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238 theSubtypes.add(aType); |
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239 String[] myTypes = new String[theSubtypes.size()]; |
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240 theCurrentSubtypes = (String[]) theSubtypes.toArray(myTypes); |
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241 |
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242 theMetaData.getAccessor().save(FixedOIDs.SUBTYPES_KEY, |
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243 theSubtypes); |
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244 } |
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245 } |
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246 |
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247 public synchronized String[] getSubtypes() { |
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248 return theCurrentSubtypes; |
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249 } |
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250 |
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251 public synchronized void setFields(MangledField[] aSetOfFields) |
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252 throws IOException { |
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253 |
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254 /* |
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255 It's possible that a couple of threads may have seen the undefined |
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256 schema state - in this case, they'll all rush to sort out the |
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257 schema - in these cases, we ignore those duplicate requests. |
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258 */ |
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259 if (noSchemaDefined == false) |
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260 return; |
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261 |
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262 ArrayList myFields = new ArrayList(); |
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263 |
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264 theIndexes = new KeyIndex[aSetOfFields.length]; |
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265 |
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266 // Fields are always in the same order |
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267 for (int i = 0; i < aSetOfFields.length; i++) { |
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268 myFields.add(aSetOfFields[i].getName()); |
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269 KeyIndex myIndex = newIndex(aSetOfFields[i].getName(), i); |
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270 theIndexes[i] = myIndex; |
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271 } |
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272 |
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273 theMetaData.getAccessor().save(FixedOIDs.INDEXES_KEY, theIndexes); |
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274 |
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275 noSchemaDefined = false; |
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276 |
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277 StatsBoard.get().add(new FieldsStat(theType, myFields)); |
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278 } |
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279 |
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280 public boolean noSchemaDefined() { |
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281 return noSchemaDefined; |
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282 } |
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283 |
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284 public void close() throws IOException { |
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285 try { |
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286 |
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287 theTracker.close(); |
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288 |
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289 if (theIndexes != null) { |
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290 for (int i = 0; i < theIndexes.length; i++) { |
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291 theIndexes[i].close(); |
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292 } |
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293 } |
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294 |
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295 theMainDb.close(); |
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296 |
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297 } catch (DatabaseException aDbe) { |
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298 theLogger.log(Level.SEVERE, "Couldn't close maindb", aDbe); |
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299 throw new IOException("Dbe"); |
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300 } |
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301 |
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302 theMetaData.close(); |
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303 } |
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304 |
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305 public void delete() throws IOException { |
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306 theTracker.delete(); |
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307 |
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308 RegistryFactory.delete(theType); |
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309 |
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310 AllocatorFactory.delete(theType); |
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311 |
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312 if (theIndexes != null) { |
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313 for (int i = 0; i < theIndexes.length; i++) { |
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314 theIndexes[i].delete(); |
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315 } |
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316 } |
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317 |
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318 Disk.deleteDb(theType); |
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319 } |
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320 |
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321 public OID getNextId() throws IOException { |
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322 return theAllocator.getNextId(); |
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323 } |
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324 |
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325 public void bringOutTheDead(EntryReaper aReaper) throws IOException { |
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326 theTracker.bringOutTheDead(aReaper); |
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327 } |
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328 |
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329 private KeyIndex newIndex(String aName, int anOffset) throws IOException { |
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330 KeyIndex myIndex = new KeyIndex(theType, aName, anOffset); |
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331 myIndex.init(); |
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332 |
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333 return myIndex; |
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334 } |
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335 |
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336 private void loadIndexes(byte[] aSetOfIndexes) |
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337 throws IOException { |
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338 |
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339 ArrayList myFields = new ArrayList(); |
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340 |
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341 theIndexes = (KeyIndex[]) ObjectTransformer.toObject(aSetOfIndexes); |
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342 |
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343 for (int i = 0; i < theIndexes.length; i++) { |
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344 myFields.add(theIndexes[i].getName()); |
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345 theIndexes[i].init(); |
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346 } |
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347 |
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348 StatsBoard.get().add(new FieldsStat(theType, myFields)); |
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349 } |
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350 |
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351 /* ******************************************************************* |
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352 * BackingStore impl |
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353 * *******************************************************************/ |
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354 |
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355 public void save(Identifiable anIdentifiable) throws IOException { |
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356 // Not done here, delegated to the WriteScheduler for asynch write |
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357 // |
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358 theWriteScheduler.add((EntrySleeveImpl) anIdentifiable); |
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359 } |
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360 |
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361 public Identifiable load(Identifier anId) throws IOException { |
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362 // Check there isn't a dirty copy in write cache before hitting disk |
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363 Identifiable myIdentifiable = |
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364 theWriteScheduler.dirtyRead((OID) anId); |
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365 |
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366 if (myIdentifiable == null) { |
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367 byte[] myPackage = load((OID) anId); |
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368 |
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369 if (myPackage != null) { |
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370 // System.out.println("Got from disk: " + anId); |
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371 return new EntrySleeveImpl(myPackage); |
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372 } else return null; |
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373 } else { |
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374 // System.out.println("Got from dirty: " + anId); |
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375 return myIdentifiable; |
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376 } |
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377 } |
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378 |
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379 private byte[] load(final OID anId) throws IOException { |
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380 if (theLogger.isLoggable(Level.FINEST)) |
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381 theLogger.log(Level.FINEST, "Sload: " + anId); |
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382 |
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383 // System.err.println("Sload: " + anId); |
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384 |
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385 final DatabaseEntry myKey = |
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386 new DatabaseEntry(OIDFactory.getKey(anId)); |
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387 |
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388 RetryableOperation myOp = |
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389 new RetryableOperation() { |
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390 public Object perform(DiskTxn aTxn) throws DatabaseException { |
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391 DatabaseEntry myData = new DatabaseEntry(); |
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392 |
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393 OperationStatus myStatus; |
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394 |
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395 myStatus = theMainDb.get(aTxn.getDbTxn(), myKey, myData, |
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396 null); |
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397 |
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398 if (! myStatus.equals(OperationStatus.NOTFOUND)) { |
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399 return myData.getData(); |
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400 } |
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401 |
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402 return null; |
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403 } |
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404 |
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405 public String toString() { |
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406 return "Load: " + anId; |
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407 } |
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408 }; |
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409 |
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410 Object myResult = new RetryingUpdate(myOp).commit(); |
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411 |
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412 return (myResult == null) ? null : (byte[]) myResult; |
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413 } |
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414 |
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415 public void delete(PersistentEntry anEntry) throws IOException { |
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416 final OID myId = anEntry.getOID(); |
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417 MangledField[] myKeys = anEntry.getEntry().getFields(); |
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418 |
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419 if (theLogger.isLoggable(Level.FINEST)) |
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420 theLogger.log(Level.FINEST, "Sdelete: " + myId); |
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421 |
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422 // System.err.println("Sdelete: " + myId); |
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423 |
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424 theTracker.delete(anEntry); |
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425 |
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426 // Delete from indexes in reverse |
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427 for (int i = (theIndexes.length - 1); i >= 0; i--) { |
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428 theIndexes[i].unIndex(myId, myKeys); |
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429 } |
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430 |
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431 RetryableOperation myOp = |
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432 new RetryableOperation() { |
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433 public Object perform(DiskTxn aTxn) throws DatabaseException { |
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434 OperationStatus myStatus = |
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435 theMainDb.delete(aTxn.getDbTxn(), |
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436 new DatabaseEntry(OIDFactory.getKey(myId))); |
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437 |
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438 if (myStatus.equals(OperationStatus.NOTFOUND)) |
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439 theLogger.log(Level.SEVERE, |
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440 "Warning failed to delete key from maindb"); |
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441 |
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442 return null; |
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443 } |
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444 |
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445 public String toString() { |
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446 return "Delete: " + myId; |
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447 } |
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448 }; |
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449 |
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450 new RetryingUpdate(myOp).commit(); |
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451 } |
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452 |
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453 public void update(PersistentEntry anEntry) throws IOException { |
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454 final OID myId = anEntry.getOID(); |
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455 final byte[] myPackage = anEntry.flatten(); |
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456 |
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457 if (theLogger.isLoggable(Level.FINEST)) |
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458 theLogger.log(Level.FINEST, "Supdate: " + myId); |
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459 |
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460 // System.err.println("Supdate: " + myId); |
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461 |
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462 theTracker.update(anEntry); |
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463 |
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464 RetryableOperation myOp = |
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465 new RetryableOperation() { |
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466 public Object perform(DiskTxn aTxn) throws DatabaseException { |
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467 theMainDb.put(aTxn.getDbTxn(), |
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468 new DatabaseEntry(OIDFactory.getKey(myId)), |
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469 new DatabaseEntry(myPackage)); |
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470 |
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471 return null; |
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472 } |
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473 |
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474 public String toString() { |
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475 return "Update: " + myId; |
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476 } |
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477 }; |
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478 |
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479 new RetryingUpdate(myOp).commit(); |
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480 } |
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481 |
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482 public void write(PersistentEntry anEntry) throws IOException { |
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483 final OID myId = anEntry.getOID(); |
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484 final MangledField[] myKeys = anEntry.getEntry().getFields(); |
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485 final byte[] myPackage = anEntry.flatten(); |
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486 |
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487 if (theLogger.isLoggable(Level.FINEST)) |
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488 theLogger.log(Level.FINEST, "Swrite: " + myId); |
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489 |
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490 // System.err.println("Swrite: " + myId); |
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491 |
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492 theTracker.write(anEntry); |
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493 |
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494 RetryableOperation myOp = |
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495 new RetryableOperation() { |
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496 public Object perform(DiskTxn aTxn) throws DatabaseException { |
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497 |
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498 /* |
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499 This must be an all or nothing operation - we cannot have |
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500 some indexes with an inserted entry and others without or |
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501 a missing main db entry. |
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502 */ |
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503 |
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504 // Index in reverse |
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505 for (int i = (theIndexes.length - 1); i >= 0; i--) { |
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506 theIndexes[i].index(myId, myKeys, aTxn); |
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507 } |
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508 |
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509 theMainDb.put(aTxn.getDbTxn(), |
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510 new DatabaseEntry(OIDFactory.getKey(myId)), |
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511 new DatabaseEntry(myPackage)); |
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512 |
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513 return null; |
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514 } |
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515 |
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516 public String toString() { |
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517 return "Write: " + myId; |
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518 } |
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519 }; |
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520 |
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521 new RetryingUpdate(myOp).commit(); |
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522 } |
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523 |
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524 /* ********************************************************************* |
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525 Search code starts here |
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526 *********************************************************************/ |
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527 |
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528 public TupleLocator find(MangledEntry anEntry) throws IOException { |
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529 if (noSchemaDefined()) |
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530 return null; |
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|
531 |
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532 theLogger.log(Level.FINEST, "find"); |
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533 |
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534 /* |
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535 For a full maindb search we pass empty key and data with the |
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536 DBNEXT flag. |
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537 |
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538 For a secondary index search we pass a specified key and empty data |
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539 with DBSET. |
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540 */ |
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541 try { |
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parents:
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542 if ((anEntry == null) || (anEntry.isWildcard())) { |
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Dan Creswell <dan.creswell@gmail.com>
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543 theLogger.log(Level.FINEST, "wildcard"); |
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544 |
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545 Cursor myCursor = |
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546 theMainDb.openCursor(null, null); |
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547 |
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548 OperationStatus myStatus = |
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549 myCursor.getNext(new DatabaseEntry(), |
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parents:
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550 new DatabaseEntry(), null); |
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parents:
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|
551 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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552 if (myStatus.equals(OperationStatus.NOTFOUND)) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
553 myCursor.close(); |
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parents:
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|
554 return null; |
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parents:
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|
555 } else { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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|
556 ReadAhead myRead = |
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parents:
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557 (ReadAhead) theConstraints.get(ReadAhead.class); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
558 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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559 return new PrimaryLocatorImpl(myCursor, anEntry, |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
560 myRead.getSize()); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
561 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
562 } else { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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|
563 theLogger.log(Level.FINEST, "index"); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
564 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
565 // Locate the smallest search set |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
566 Cursor myCursor = null; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
567 MangledField[] myFields = anEntry.getFields(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
568 byte[] myPackedKey = new byte[4]; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
569 BytePacker myPacker = BytePacker.getMSBPacker(myPackedKey); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
570 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
571 int[] mySizes = new int[myFields.length]; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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changeset
|
572 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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573 if ((anEntry.getType().equals(theType)) && |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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574 (myFields.length != theIndexes.length)) |
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parents:
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|
575 theLogger.log(Level.WARNING, "Possible schema change detected - matching may fail" + theType); |
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parents:
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changeset
|
576 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
577 // Do the analysis in reverse |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
578 for (int i = (myFields.length - 1); i >= 0; i--) { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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|
579 MangledField myField = myFields[i]; |
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parents:
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|
580 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
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|
581 if (myField.isNull()) |
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parents:
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changeset
|
582 mySizes[i] = WAS_NULL; |
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parents:
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|
583 else { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
584 theLogger.log(Level.FINEST, "scanning: " + |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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changeset
|
585 myField.getName()); |
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parents:
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|
586 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
587 int myHashCode = myField.hashCode(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
588 myPacker.putInt(myHashCode, 0); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
589 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
590 DiskTxn myStandalone = DiskTxn.newStandalone(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
591 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
592 myCursor = theIndexes[i].newCursor(null); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
593 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff
changeset
|
594 OperationStatus myStatus = |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff
changeset
|
595 myCursor.getSearchKey(new DatabaseEntry(myPackedKey), new DatabaseEntry(), null); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
596 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
597 // If we get results back we can do a compare |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff
changeset
|
598 if (! myStatus.equals(OperationStatus.NOTFOUND)) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff
changeset
|
599 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
600 theLogger.log(Level.FINEST, "Got: " + |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
601 myCursor.count() + " entries"); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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changeset
|
602 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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603 mySizes[i] = myCursor.count(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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604 } else { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
605 theLogger.log(Level.FINEST, "Got 0 entries"); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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606 mySizes[i] = NO_HITS; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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607 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
608 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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609 myCursor.close(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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610 myStandalone.commit(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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611 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
612 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
613 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
614 int mySmallestSize = Integer.MAX_VALUE; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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615 int myChoice = -1; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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616 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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617 for (int i = 0; i < mySizes.length; i++) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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618 /* |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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619 If the field contributed no filtering because it was |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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620 wildcard, ignore it. Note that _at least one_ of the |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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621 fields must be non-null because we aren't wildcard |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
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622 matching (caught and handled above) |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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623 */ |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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624 if (mySizes[i] != WAS_NULL) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
625 /* |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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626 If any contributing index returned no hits, we know |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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627 there is going to be no match so we can stop right |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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628 now |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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629 */ |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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630 if (mySizes[i] == NO_HITS) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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631 theLogger.log(Level.FINEST, "Aborting search, one field didn't match"); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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632 return null; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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633 } else if (mySizes[i] < mySmallestSize) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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634 /* |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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635 The index under consideration produced fewer |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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636 matches than our previous choice |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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637 */ |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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638 myChoice = i; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
639 mySmallestSize = mySizes[i]; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
640 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
641 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
642 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
643 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
644 /* |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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645 If an Entry has all null fields, it's a wildcard which is |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
646 handled above. If the Entry is not wildcard and any one |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
647 of the indexes yielded no hits, we will have already |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
648 exited above. |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
649 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
650 Thus we are left with whichever index yielded the lowest |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
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651 number of hits. So we now load up that index and return |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
652 it. |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
653 */ |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
654 theLogger.log(Level.FINEST, "Searching: " + |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
655 mySmallestSize + " from " + |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
656 theIndexes[myChoice].getName()); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
657 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
658 myPacker.putInt(myFields[myChoice].hashCode(), 0); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
659 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
660 /* |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
661 Now we've decided on the cursor we wish to use, we can |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
662 open it in the main txn. |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
663 */ |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
664 myCursor = theIndexes[myChoice].newCursor(null); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
665 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
666 DatabaseEntry myHashKey = new DatabaseEntry(myPackedKey); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
667 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
668 OperationStatus myStatus = |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
669 myCursor.getSearchKey(myHashKey, new DatabaseEntry(), |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
670 null); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
671 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
672 if (! myStatus.equals(OperationStatus.NOTFOUND)) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
673 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
674 theLogger.log(Level.FINEST, "Got: " + |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
675 myCursor.count() + " entries"); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
676 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
677 ReadAhead myRead = |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
678 (ReadAhead) theConstraints.get(ReadAhead.class); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
679 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
680 return new IndexLocatorImpl(myCursor, myHashKey, |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
681 anEntry, myRead.getSize()); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
682 } else { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
683 myCursor.close(); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
684 return null; |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
685 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
686 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
687 } catch (DatabaseException aDbe) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
688 theLogger.log(Level.SEVERE, "Got Dbe", aDbe); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
689 throw new IOException("Dbe"); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
690 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
691 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
692 } |