Mercurial > hg > blitz_stable
annotate src/org/dancres/blitz/entry/SleeveCache.java @ 8:fa7203ea1622
Remove some dead code (Dave Brosius)
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 23 May 2009 11:27:41 +0100 |
parents | 3dc0c5604566 |
children | 46ac1a45718a |
rev | line source |
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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 |
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5 import java.util.ArrayList; |
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6 |
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7 import java.util.logging.*; |
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8 |
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9 import net.jini.core.transaction.TransactionException; |
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10 import net.jini.config.ConfigurationException; |
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11 |
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12 import org.dancres.blitz.mangler.MangledEntry; |
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13 |
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14 import org.dancres.blitz.Logging; |
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15 import org.dancres.blitz.stats.StatGenerator; |
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16 import org.dancres.blitz.stats.Stat; |
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17 import org.dancres.blitz.stats.SearchStat; |
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18 import org.dancres.blitz.stats.StatsBoard; |
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19 |
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20 import org.dancres.blitz.oid.OID; |
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21 |
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22 import org.dancres.blitz.arc.ArcCache; |
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23 import org.dancres.blitz.arc.CacheBlockDescriptor; |
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24 import org.dancres.blitz.arc.RecoverySummary; |
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25 |
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26 import org.dancres.blitz.txn.TxnManager; |
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27 |
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28 import org.dancres.blitz.entry.ci.CacheIndexer; |
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29 |
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30 import org.dancres.blitz.config.CacheSize; |
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31 import org.dancres.blitz.config.Fifo; |
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32 import org.dancres.blitz.config.EntryConstraints; |
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33 |
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34 import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicLong; |
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35 |
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36 /** |
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37 The organization of the space implementation can be viewed as being |
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38 similar to a memory hierarchy with EntryReposImpl/SpaceImpl being where |
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39 central processing happens. SleeveCache can be viewed as level 1 cache |
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40 whilst storage is main memory. Thus all "traffic" goes through SleeveCache |
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41 which interacts appropriately with Storage when it cannot satisfy the |
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42 demand itself. <P> |
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43 |
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44 Is responsible for indexing and caching of unpacked EntrySleeveImpls. |
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45 Implemented using an ArcCache.<P> |
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46 |
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47 @see org.dancres.blitz.arc.ArcCache |
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48 |
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49 @todo One way to split caches down further in the face of concurrency |
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50 demands would be to start maintaining multiple caches scoped or hashed on |
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51 the zone id or even the uid itself. |
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52 */ |
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53 class SleeveCache implements StatGenerator { |
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54 static Logger theLogger = |
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55 Logging.newLogger("org.dancres.blitz.disk.SleeveCache"); |
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56 |
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57 private ArcCache theStoreCache; |
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58 |
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59 private Storage theStore; |
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60 |
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61 private CountersImpl theCounters; |
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62 |
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63 private EntryConstraints theConstraints; |
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64 |
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65 private CacheIndexer theIndexer; |
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66 |
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67 private long theId = StatGenerator.UNSET_ID; |
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68 |
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69 private static class OfferTracker { |
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70 private String theType; |
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71 private AtomicLong theMissed = new AtomicLong(); |
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72 private AtomicLong theDeld = new AtomicLong(); |
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73 |
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74 OfferTracker(String aType) { |
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75 theType = aType; |
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76 } |
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77 |
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78 void incMissed() { |
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79 theMissed.incrementAndGet(); |
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80 } |
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81 |
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82 void incDeld() { |
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83 theDeld.incrementAndGet(); |
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84 } |
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85 |
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86 public String getTitle() { |
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87 return theType; |
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88 } |
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89 |
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90 public long getMisses() { |
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91 return theMissed.get(); |
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92 } |
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93 |
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94 public long getDeld() { |
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95 return theDeld.get(); |
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96 } |
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97 } |
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98 |
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99 private static final int CACHED_TRACKER = 0; |
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100 private static final int DIRTY_TRACKER = 1; |
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101 private static final int STORAGE_TRACKER = 2; |
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102 |
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103 private OfferTracker[] theTrackers = new OfferTracker[] { |
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104 new OfferTracker("Cached"), new OfferTracker("Dirty"), |
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105 new OfferTracker("Storage") |
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106 }; |
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107 |
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108 SleeveCache(Storage aStore) throws IOException { |
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109 theStore = aStore; |
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110 |
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111 try { |
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112 theConstraints = |
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113 EntryConstraints.getConstraints(theStore.getType()); |
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114 } catch (ConfigurationException aCE) { |
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115 theLogger.log(Level.SEVERE, |
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116 "Couldn't load constraints for type " + |
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117 theStore.getType(), aCE); |
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118 IOException myIOE = |
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119 new IOException("Couldn't load constraints for type " + |
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120 theStore.getType()); |
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121 myIOE.initCause(aCE); |
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122 throw myIOE; |
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123 } |
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124 |
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125 CacheSize myCacheSize = (CacheSize) theConstraints.get(CacheSize.class); |
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126 |
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127 theLogger.log(Level.INFO, aStore.getType() + " cache size = " |
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128 + myCacheSize.getSize()); |
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129 |
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130 theStoreCache = new ArcCache(aStore, myCacheSize.getSize()); |
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131 |
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132 theIndexer = CacheIndexer.getIndexer(theStore.getType()); |
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133 |
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134 theStoreCache.add(new CacheListenerImpl(theIndexer)); |
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135 |
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136 try { |
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137 theCounters = new CountersImpl(theStore.getType(), |
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138 theStore.getNumEntries()); |
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139 } catch (IOException anIOE) { |
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140 theLogger.log(Level.SEVERE, |
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141 "Couldn't read instance count from storage: " + |
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142 theStore.getType() + |
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143 " statistics will be inaccurate", anIOE); |
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144 |
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145 theCounters = new CountersImpl(theStore.getType(), 0); |
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146 } |
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147 |
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148 StatsBoard.get().add(this); |
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149 } |
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150 |
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151 public void setId(long anId) { |
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152 theId = anId; |
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153 } |
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154 |
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155 public long getId() { |
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156 return theId; |
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157 } |
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158 |
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159 public Stat generate() { |
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160 String[] myTitles = new String[theTrackers.length]; |
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161 long[] myMisses = new long[theTrackers.length]; |
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162 long[] myDeld = new long[theTrackers.length]; |
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163 |
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164 for (int i = 0; i < theTrackers.length; i++) { |
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165 myTitles[i] = theTrackers[i].getTitle(); |
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166 myMisses[i] = theTrackers[i].getMisses(); |
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167 myDeld[i] = theTrackers[i].getDeld(); |
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168 } |
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169 |
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170 return new SearchStat(theId, theStore.getType(), myTitles, |
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171 myMisses, myDeld); |
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172 } |
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173 |
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174 void forceSync(CacheBlockDescriptor aCBD) throws IOException { |
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175 theStoreCache.forceSync(aCBD); |
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176 } |
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177 |
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178 CacheBlockDescriptor load(OID aOID) throws IOException { |
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179 return theStoreCache.find(aOID); |
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180 } |
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181 |
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182 CacheBlockDescriptor add(EntrySleeveImpl aSleeve) throws IOException { |
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183 return theStoreCache.insert(aSleeve); |
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184 } |
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185 |
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186 RecoverySummary recover(EntrySleeveImpl aSleeve) |
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187 throws IOException { |
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188 return theStoreCache.recover(aSleeve); |
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189 } |
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190 |
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191 boolean renew(OID aOID, long anExpiry) throws IOException { |
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192 CacheBlockDescriptor myCBD = theStoreCache.find(aOID); |
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193 |
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194 if (myCBD == null) { |
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195 return false; |
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196 } |
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197 |
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198 EntrySleeveImpl mySleeve = (EntrySleeveImpl) myCBD.getContent(); |
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199 |
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200 if (!mySleeve.hasExpired(System.currentTimeMillis()) && |
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201 !mySleeve.getState().test(SleeveState.DELETED)) { |
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202 |
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203 if (anExpiry == 0) { |
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204 // Don't reset expiry - it's useful to storage to know |
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205 // what the lease was last |
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206 mySleeve.getState().set(SleeveState.DELETED); |
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207 |
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208 // Update stats |
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209 theCounters.didPurge(); |
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210 } else { |
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211 mySleeve.setExpiry(anExpiry); |
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212 } |
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213 |
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214 mySleeve.markDirty(); |
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215 myCBD.release(); |
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216 |
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217 return true; |
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218 } |
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219 |
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220 myCBD.release(); |
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221 |
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222 return false; |
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223 } |
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224 |
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225 boolean cancel(OID aOID) throws IOException { |
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226 return renew(aOID, 0); |
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227 } |
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228 |
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229 void sync() throws IOException { |
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230 theStoreCache.sync(); |
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231 } |
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232 |
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233 Counters getCounters() { |
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234 return theCounters; |
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235 } |
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236 |
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237 void close() { |
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238 // Nothing to do here - we could destroy the counters but we put that |
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239 // in deleteAll which makes more sense as close doesn't mean deletion |
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240 // theStoreCache.dump(); |
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241 } |
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242 |
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243 void write(MangledEntry anEntry, long anExpiry, WriteEscort anEscort) |
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244 throws IOException { |
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245 |
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246 |
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247 OID myID = theStore.getNextId(); |
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248 EntrySleeveImpl mySleeve = null; |
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249 |
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250 if (theLogger.isLoggable(Level.FINE)) |
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251 theLogger.log(Level.FINE, "Written: " + myID + ", " + |
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252 anExpiry + ", " + |
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253 (anExpiry - System.currentTimeMillis())); |
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254 |
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255 mySleeve = new EntrySleeveImpl(myID, anEntry, anExpiry); |
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256 |
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257 // Ready to write but tell the escort first |
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258 OpInfo myInfo = new WriteEntryOpInfo(mySleeve); |
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259 |
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260 if (!anEscort.writing(myInfo)) |
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261 return; |
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262 |
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263 // Now make it visible |
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264 CacheBlockDescriptor myCBD = theStoreCache.insert(mySleeve); |
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265 myCBD.release(); |
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266 |
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267 if (theLogger.isLoggable(Level.FINE)) |
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268 theLogger.log(Level.FINE, "Unwritten: " + mySleeve.getOID()); |
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269 } |
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270 |
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271 void find(MangledEntry anEntry, SearchVisitor aVisitor) |
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272 throws IOException { |
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273 |
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274 if (theConstraints.get(Fifo.class) != null) |
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275 fifoFind(anEntry, aVisitor); |
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276 else |
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277 fastFind(anEntry, aVisitor); |
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278 } |
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279 |
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280 /** |
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281 <p>If we're in FIFO mode, we know that each TupleLocator is sorted into |
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282 FIFO order. Thus we can merge across all locators on the fly |
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283 and obtain a fully ordered, non-duplicate set of tuple id's for |
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284 matching using a simply algorithm.</p> |
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285 |
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286 <p>By sorting across all locators and applying global FIFO order |
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287 we can maximize use of the cache and avoid excessive disk hits if |
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288 we have sufficient of the FIFO ordering in cache. Thus we get |
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289 graceful degradation rather than consulting disk for the definitive |
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290 ordering regardless.</p> |
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291 */ |
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292 private void fifoFind(MangledEntry anEntry, SearchVisitor aVisitor) |
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293 throws IOException { |
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294 |
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295 long mySearchStart = System.currentTimeMillis(); |
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296 |
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297 ArrayList myLocators = new ArrayList(); |
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298 |
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299 TupleLocator myLocator = theStore.find(anEntry); |
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300 |
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301 if (myLocator != null) |
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302 myLocators.add(myLocator); |
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303 |
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304 myLocator = theStore.findCached(anEntry); |
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305 |
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306 if (myLocator != null) |
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307 myLocators.add(myLocator); |
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308 |
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309 myLocator = theIndexer.find(anEntry); |
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310 |
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311 if (myLocator != null) |
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312 myLocators.add(myLocator); |
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313 |
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314 if (myLocators.size() == 0) |
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315 return; |
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316 |
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317 TupleLocator[] mySortedSources = new TupleLocator[myLocators.size()]; |
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318 |
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319 mySortedSources = (TupleLocator[]) myLocators.toArray(mySortedSources); |
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320 |
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321 myLocator = new SortingLocator(mySortedSources); |
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322 |
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323 offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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324 theTrackers[CACHED_TRACKER]); |
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325 } |
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326 |
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327 private void fastFind(MangledEntry anEntry, SearchVisitor aVisitor) |
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328 throws IOException { |
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329 |
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330 long mySearchStart = System.currentTimeMillis(); |
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331 |
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332 /* |
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333 Basic approach is to send the template to the CacheIndexer and |
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334 ask it to return suitable IDs which we will then pin and try. |
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335 Note we should set a flag which boycotts a load from disk so that |
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336 flushed or deleted entries are not loaded more than once. |
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337 |
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338 If we cannot satisfy the Visitor that way, we repeat the exercise |
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339 with storage which returns OID/byte[] pairs which we can then |
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340 pin. |
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341 |
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342 Storage and CacheIndexer are now free to plan searches as they |
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343 see fit based on template. |
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344 */ |
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345 |
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346 TupleLocator myLocator = theIndexer.find(anEntry); |
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347 |
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348 if (theLogger.isLoggable(Level.FINE)) |
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349 theLogger.log(Level.FINE, "Searching[cache]: " + myLocator); |
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350 |
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351 if (myLocator != null) { |
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352 if (offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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353 theTrackers[CACHED_TRACKER])) { |
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354 /* |
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355 System.err.println("Cache search time: " + |
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356 (System.currentTimeMillis() - |
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357 mySearchStart)); |
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358 */ |
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359 return; |
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360 } |
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361 } |
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362 |
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363 if (theLogger.isLoggable(Level.FINE)) |
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364 theLogger.log(Level.FINE, "Searching[StoreCache]: " + myLocator); |
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365 |
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366 myLocator = theStore.findCached(anEntry); |
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367 |
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368 if (myLocator != null) { |
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369 if (offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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370 theTrackers[DIRTY_TRACKER])) |
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371 return; |
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372 } |
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373 |
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374 myLocator = theStore.find(anEntry); |
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375 |
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376 if (myLocator == null) { |
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377 if (theLogger.isLoggable(Level.FINE)) |
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378 theLogger.log(Level.FINE, "Got no matches on disk"); |
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379 return; |
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380 } |
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381 |
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382 offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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383 theTrackers[STORAGE_TRACKER]); |
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384 } |
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385 |
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386 LongtermOffer getOffer(OID anOID) throws IOException { |
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387 |
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388 CacheBlockDescriptor myCBD = theStoreCache.find(anOID); |
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389 |
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390 if (myCBD != null) { |
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391 return new LongtermOfferImpl(myCBD); |
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392 } else |
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393 return null; |
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394 } |
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395 |
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396 boolean find(SearchVisitor aVisitor, OID aOID, MangledEntry aPreload) |
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397 throws IOException { |
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398 |
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399 CacheBlockDescriptor myCBD = theStoreCache.find(aOID); |
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400 |
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401 long myStartTime = System.currentTimeMillis(); |
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402 |
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403 boolean offered = false; |
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404 |
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405 if (myCBD != null) { |
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406 try { |
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407 EntrySleeveImpl mySleeve = |
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408 (EntrySleeveImpl) myCBD.getContent(); |
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409 |
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410 /* |
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411 If the JS specification is changed to cope with the issues |
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412 discussed in http://archives.java.sun.com/cgi-bin/wa?A2=ind0311&L=javaspaces-users&F=&S=&P=4599 and http://archives.java.sun.com/cgi-bin/wa?A2=ind0311&L=javaspaces-users&F=&S=&P=3590 then we need to do two things: |
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413 |
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414 (1) Allow the SearchVisitor to see Sleeve's even if they've |
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415 expired. |
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416 (2) Having "shown" it to the SearchVisitor we'd need to |
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417 query the ReapFilters and if they don't boycott, mark the |
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418 item deleted. |
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419 |
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420 These two steps have the effect of allowing a *ifExists to |
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421 conflict on lease-expired entries that have been locked |
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422 by a transaction and ensures we only delete such entries |
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423 when no transactions have posession of them anymore. Of |
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424 course, this is somewhat slower and less efficient as |
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425 there's never a circumstance under which we can be assured |
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426 that a SearchVisitor *never* sees a particular entry again. |
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427 |
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428 If we must implement the strategy of flunking a transaction |
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429 owing to a lock on a lease expired object, this would be |
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430 best dealt with by having TxnOp's check expiries at prepare |
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431 or commit time. However this is much less appealing as what |
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432 is basically a pessimistic transaction API becomes |
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433 optimistic in this case and only in this case. |
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434 |
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435 All this applies to the similar statement in offer() below. |
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436 */ |
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parents:
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437 if (! mySleeve.getState().test(SleeveState.DELETED)) { |
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438 |
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parents:
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439 // If it's expired, mark it deleted, subject to filters |
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440 // |
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441 if (mySleeve.hasExpired(myStartTime)) { |
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442 |
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443 if (! EntryRepositoryFactory.getReaper().filter(mySleeve)) { |
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444 mySleeve.getState().set(SleeveState.DELETED); |
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445 mySleeve.markDirty(); |
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446 |
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447 // Update stats |
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448 theCounters.didPurge(); |
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449 } |
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450 } else { |
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451 OpInfo myInfo = |
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452 new FindEntryOpInfo(theStore.getType(), |
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453 mySleeve.getOID(), |
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454 aVisitor.isDeleter()); |
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|
455 |
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parents:
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456 SearchOffer myOffer; |
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parents:
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|
457 |
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458 if (aPreload != null) { |
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459 myOffer = new SearchOfferImpl(aPreload, myInfo); |
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460 } else { |
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461 theLogger.log(Level.FINE, "NOT using preload"); |
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462 |
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parents:
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463 myOffer = new SearchOfferImpl(mySleeve.getEntry(), |
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464 myInfo); |
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465 } |
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parents:
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466 |
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467 aVisitor.offer(myOffer); |
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|
468 |
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parents:
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469 offered = true; |
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470 } |
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parents:
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471 } else { |
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472 theTrackers[CACHED_TRACKER].incDeld(); |
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473 } |
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parents:
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474 } finally { |
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475 myCBD.release(); |
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476 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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477 } else { |
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478 theTrackers[CACHED_TRACKER].incMissed(); |
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479 } |
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480 |
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481 return offered; |
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parents:
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|
482 } |
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parents:
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483 |
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484 private boolean offerAndReleaseLocator(TupleLocator aLocator, |
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485 SearchVisitor aVisitor, |
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486 long aStartTime, |
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487 OfferTracker aTracker) |
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488 throws IOException { |
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parents:
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489 |
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parents:
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490 try { |
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parents:
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491 return offer(aLocator, aVisitor, aStartTime, aTracker); |
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492 } finally { |
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493 aLocator.release(); |
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494 } |
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parents:
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495 } |
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parents:
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496 |
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497 /** |
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498 @return <code>true</code> means offering can stop for better or worse. |
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499 <code>false</code> indicates that the search should continue if there |
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500 are other sources of offers. |
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501 */ |
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502 private boolean offer(TupleLocator aLocator, SearchVisitor aVisitor, |
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503 long aStartTime, OfferTracker aTracker) |
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504 throws IOException { |
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parents:
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505 |
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506 int myVisitorResponse = SearchVisitor.TRY_AGAIN; |
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507 |
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parents:
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508 OID myId = null; |
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509 EntrySleeveImpl mySleeve = null; |
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510 String myType = theStore.getType(); |
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511 boolean isDeletion = aVisitor.isDeleter(); |
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512 |
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513 // long myStart = System.currentTimeMillis(); |
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parents:
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514 |
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parents:
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515 while (aLocator.fetchNext()) { |
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parents:
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516 |
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parents:
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517 myId = aLocator.getOID(); |
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518 |
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519 CacheBlockDescriptor myCBD = theStoreCache.find(myId); |
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520 |
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521 if (myCBD != null) { |
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parents:
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522 mySleeve = (EntrySleeveImpl) myCBD.getContent(); |
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parents:
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523 |
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524 if (! mySleeve.getState().test(SleeveState.DELETED)) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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|
525 |
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parents:
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526 // If it's expired, mark it deleted, subject to filters |
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parents:
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527 // |
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parents:
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528 if (mySleeve.hasExpired(aStartTime)) { |
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parents:
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529 if (! EntryRepositoryFactory.getReaper().filter(mySleeve)) { |
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530 mySleeve.getState().set(SleeveState.DELETED); |
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parents:
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531 mySleeve.markDirty(); |
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parents:
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|
532 |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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533 // Update stats |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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534 theCounters.didPurge(); |
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535 } |
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parents:
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536 } else { |
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parents:
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|
537 |
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parents:
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|
538 OpInfo myInfo = |
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539 new FindEntryOpInfo(myType, mySleeve.getOID(), |
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parents:
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540 isDeletion); |
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parents:
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|
541 |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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542 SearchOfferImpl myOffer = |
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parents:
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543 new SearchOfferImpl(mySleeve.getEntry(), myInfo); |
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parents:
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|
544 |
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parents:
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|
545 myVisitorResponse = |
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parents:
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changeset
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546 aVisitor.offer(myOffer); |
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parents:
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|
547 } |
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parents:
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|
548 } else { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
549 aTracker.incDeld();; |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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|
550 } |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
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 myCBD.release(); |
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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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|
553 |
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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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554 if ((myVisitorResponse == SearchVisitor.STOP) || |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff
changeset
|
555 (myVisitorResponse == SearchVisitor.ACCEPTED)) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
556 break; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
557 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
558 } else { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
559 aTracker.incMissed(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
560 } |
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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
|
561 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
562 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
563 /* |
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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
|
564 System.out.println("Time to offer: " + |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
565 (System.currentTimeMillis() - |
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
566 myStart)); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
567 */ |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
568 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
569 if (myVisitorResponse != SearchVisitor.TRY_AGAIN) |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
570 return true; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
571 else |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
572 return false; |
3dc0c5604566
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
573 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
574 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
575 void deleteAll() throws IOException { |
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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
|
576 theCounters.destroy(); |
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
577 |
3dc0c5604566
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
578 /* |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
579 Basic approach is to send the template to the CacheIndexer and |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
580 ask it to return suitable IDs which we will then pin and try. |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
581 Note we should set a flag which boycotts a load from disk so that |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
582 flushed or deleted entries are not loaded more than once. |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
583 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
584 If we cannot satisfy the Visitor that way, we repeat the exercise |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
585 with storage which returns OID/byte[] pairs which we can then |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
586 pin. |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
587 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
588 Storage and CacheIndexer are now free to plan searches as they |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
589 see fit based on template. |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
590 */ |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
591 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
592 TupleLocator myLocator = theIndexer.find(MangledEntry.NULL_TEMPLATE); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
593 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
594 if (theLogger.isLoggable(Level.FINE)) |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
595 theLogger.log(Level.FINE, "Searching[cache]: " + myLocator); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
596 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
597 if (myLocator != null) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
598 delete(myLocator); |
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599 } |
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600 |
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601 if (theLogger.isLoggable(Level.FINE)) |
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602 theLogger.log(Level.FINE, "Searching[StoreCache]: " + myLocator); |
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603 |
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604 myLocator = theStore.findCached(MangledEntry.NULL_TEMPLATE); |
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605 |
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606 if (myLocator != null) { |
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607 delete(myLocator); |
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608 } |
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609 |
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610 myLocator = theStore.find(MangledEntry.NULL_TEMPLATE); |
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611 |
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612 if (myLocator == null) { |
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613 if (theLogger.isLoggable(Level.FINE)) |
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614 theLogger.log(Level.FINE, "Got no matches on disk"); |
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615 return; |
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616 } |
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617 |
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618 delete(myLocator); |
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619 } |
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620 |
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621 private void delete(TupleLocator aLocator) throws IOException { |
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622 try { |
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623 while (aLocator.fetchNext()) { |
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624 |
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625 OID myId = aLocator.getOID(); |
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626 |
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627 CacheBlockDescriptor myCBD = theStoreCache.find(myId); |
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628 |
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629 OpInfo myInfo = null; |
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630 |
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631 if (myCBD != null) { |
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632 EntrySleeveImpl mySleeve = |
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633 (EntrySleeveImpl) myCBD.getContent(); |
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634 |
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635 if (! mySleeve.getState().test(SleeveState.DELETED)) { |
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636 mySleeve.getState().set(SleeveState.DELETED); |
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637 mySleeve.markDirty(); |
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638 |
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639 myInfo = |
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640 new FindEntryOpInfo(theStore.getType(), |
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641 mySleeve.getOID(), |
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642 true); |
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parents:
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643 } |
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parents:
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644 |
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645 myCBD.release(); |
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646 |
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647 if (myInfo != null) { |
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648 try { |
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649 TxnManager.get().log(new ForcedCommit(myInfo)); |
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650 } catch (TransactionException aTE) { |
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651 IOException myIOE = new IOException("Eeek failed to delete Entry"); |
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652 myIOE.initCause(aTE); |
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653 throw myIOE; |
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parents:
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654 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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655 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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656 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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657 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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658 } finally { |
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659 aLocator.release(); |
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parents:
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660 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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661 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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662 |
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parents:
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663 public String toString() { |
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664 return "SC: " + theStore.getType(); |
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parents:
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|
665 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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666 } |