Mercurial > hg > blitz_stable
annotate src/org/dancres/blitz/entry/SleeveCache.java @ 17:46ac1a45718a
Add support for cache partitioning to improve concurrency.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sun, 05 Jul 2009 16:25:18 +0100 |
parents | 3dc0c5604566 |
children | 62b11f04d859 |
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 static final int DESIRED_ENTRIES_PER_PARTITION = 128; |
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58 |
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59 private final ArcCache[] theStoreCaches; |
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60 private final int theNumPartitions; |
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61 private final int thePartitionsMask; |
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62 |
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63 private Storage theStore; |
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64 |
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65 private CountersImpl theCounters; |
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66 |
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67 private EntryConstraints theConstraints; |
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68 |
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69 private CacheIndexer theIndexer; |
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70 |
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71 private long theId = StatGenerator.UNSET_ID; |
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72 |
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73 private static class OfferTracker { |
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74 private String theType; |
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75 private AtomicLong theMissed = new AtomicLong(); |
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76 private AtomicLong theDeld = new AtomicLong(); |
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77 |
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78 OfferTracker(String aType) { |
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79 theType = aType; |
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80 } |
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81 |
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82 void incMissed() { |
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83 theMissed.incrementAndGet(); |
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84 } |
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85 |
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86 void incDeld() { |
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87 theDeld.incrementAndGet(); |
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88 } |
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89 |
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90 public String getTitle() { |
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91 return theType; |
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92 } |
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93 |
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94 public long getMisses() { |
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95 return theMissed.get(); |
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96 } |
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97 |
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98 public long getDeld() { |
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99 return theDeld.get(); |
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100 } |
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101 } |
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102 |
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103 private static final int CACHED_TRACKER = 0; |
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104 private static final int DIRTY_TRACKER = 1; |
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105 private static final int STORAGE_TRACKER = 2; |
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106 |
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107 private OfferTracker[] theTrackers = new OfferTracker[] { |
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108 new OfferTracker("Cached"), new OfferTracker("Dirty"), |
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109 new OfferTracker("Storage") |
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110 }; |
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111 |
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112 SleeveCache(Storage aStore) throws IOException { |
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113 theStore = aStore; |
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114 |
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115 try { |
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116 theConstraints = |
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117 EntryConstraints.getConstraints(theStore.getType()); |
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118 } catch (ConfigurationException aCE) { |
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119 thePartitionsMask = 0; |
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120 theNumPartitions = 0; |
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121 theStoreCaches = new ArcCache[0]; |
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122 theLogger.log(Level.SEVERE, |
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123 "Couldn't load constraints for type " + |
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124 theStore.getType(), aCE); |
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125 IOException myIOE = |
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126 new IOException("Couldn't load constraints for type " + |
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127 theStore.getType()); |
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128 myIOE.initCause(aCE); |
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129 throw myIOE; |
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130 } |
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131 |
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132 CacheSize myCacheSize = (CacheSize) theConstraints.get(CacheSize.class); |
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133 |
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134 int myNumPartitions; |
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135 |
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136 if (DESIRED_ENTRIES_PER_PARTITION == -1) |
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137 myNumPartitions = 1; |
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138 else |
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139 myNumPartitions = (myCacheSize.getSize() / DESIRED_ENTRIES_PER_PARTITION); |
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140 |
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141 // Find nearest power of 2 > or = |
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142 // |
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143 int myPower; |
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144 for (myPower = 1; myPower < myNumPartitions; myPower = myPower << 1); |
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145 theNumPartitions = myPower; |
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146 |
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147 thePartitionsMask = theNumPartitions - 1; |
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148 |
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149 theLogger.log(Level.INFO, aStore.getType() + " cache size = " |
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150 + myCacheSize.getSize() + " partitions = " + theNumPartitions + " mask = " + Integer.toHexString(thePartitionsMask)); |
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151 |
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152 theStoreCaches = new ArcCache[theNumPartitions]; |
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153 |
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154 for (int i = 0; i < theNumPartitions; i++) { |
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155 theStoreCaches[i] = new ArcCache(aStore, theNumPartitions); |
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156 |
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157 theIndexer = CacheIndexer.getIndexer(theStore.getType()); |
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158 |
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159 theStoreCaches[i].add(new CacheListenerImpl(theIndexer)); |
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160 } |
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161 |
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162 try { |
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163 theCounters = new CountersImpl(theStore.getType(), |
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164 theStore.getNumEntries()); |
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165 } catch (IOException anIOE) { |
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166 theLogger.log(Level.SEVERE, |
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167 "Couldn't read instance count from storage: " + |
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168 theStore.getType() + |
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169 " statistics will be inaccurate", anIOE); |
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170 |
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171 theCounters = new CountersImpl(theStore.getType(), 0); |
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172 } |
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173 |
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174 StatsBoard.get().add(this); |
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175 } |
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176 |
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177 public void setId(long anId) { |
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178 theId = anId; |
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179 } |
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180 |
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181 public long getId() { |
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182 return theId; |
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183 } |
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184 |
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185 public Stat generate() { |
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186 String[] myTitles = new String[theTrackers.length]; |
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187 long[] myMisses = new long[theTrackers.length]; |
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188 long[] myDeld = new long[theTrackers.length]; |
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189 |
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190 for (int i = 0; i < theTrackers.length; i++) { |
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191 myTitles[i] = theTrackers[i].getTitle(); |
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192 myMisses[i] = theTrackers[i].getMisses(); |
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193 myDeld[i] = theTrackers[i].getDeld(); |
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194 } |
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195 |
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196 return new SearchStat(theId, theStore.getType(), myTitles, |
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197 myMisses, myDeld); |
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198 } |
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199 |
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200 private int getPartition(CacheBlockDescriptor aCBD) { |
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201 OID myOID = (OID) aCBD.getId(); |
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202 |
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203 return getPartition(myOID); |
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204 } |
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205 |
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206 private int getPartition(OID anOID) { |
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207 return anOID.hashCode() & thePartitionsMask; |
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208 } |
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209 |
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210 private int getPartition(EntrySleeveImpl aSleeve) { |
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211 return getPartition(aSleeve.getOID()); |
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212 } |
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213 |
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214 void forceSync(CacheBlockDescriptor aCBD) throws IOException { |
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215 theStoreCaches[getPartition(aCBD)].forceSync(aCBD); |
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216 } |
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217 |
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218 CacheBlockDescriptor load(OID aOID) throws IOException { |
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219 return theStoreCaches[getPartition(aOID)].find(aOID); |
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220 } |
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221 |
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222 CacheBlockDescriptor add(EntrySleeveImpl aSleeve) throws IOException { |
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223 return theStoreCaches[getPartition(aSleeve)].insert(aSleeve); |
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224 } |
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225 |
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226 RecoverySummary recover(EntrySleeveImpl aSleeve) |
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227 throws IOException { |
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228 return theStoreCaches[getPartition(aSleeve)].recover(aSleeve); |
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229 } |
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230 |
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231 boolean renew(OID aOID, long anExpiry) throws IOException { |
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232 CacheBlockDescriptor myCBD = theStoreCaches[getPartition(aOID)].find(aOID); |
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233 |
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234 if (myCBD == null) { |
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235 return false; |
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236 } |
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237 |
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238 EntrySleeveImpl mySleeve = (EntrySleeveImpl) myCBD.getContent(); |
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239 |
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240 if (!mySleeve.hasExpired(System.currentTimeMillis()) && |
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241 !mySleeve.getState().test(SleeveState.DELETED)) { |
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242 |
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243 if (anExpiry == 0) { |
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244 // Don't reset expiry - it's useful to storage to know |
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245 // what the lease was last |
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246 mySleeve.getState().set(SleeveState.DELETED); |
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247 |
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248 // Update stats |
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249 theCounters.didPurge(); |
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250 } else { |
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251 mySleeve.setExpiry(anExpiry); |
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252 } |
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253 |
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254 mySleeve.markDirty(); |
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255 myCBD.release(); |
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256 |
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257 return true; |
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258 } |
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259 |
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260 myCBD.release(); |
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261 |
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262 return false; |
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263 } |
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264 |
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265 boolean cancel(OID aOID) throws IOException { |
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266 return renew(aOID, 0); |
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267 } |
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268 |
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269 void sync() throws IOException { |
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270 for (int i = 0; i < theNumPartitions; i++) { |
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271 theStoreCaches[i].sync(); |
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272 } |
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273 } |
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274 |
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275 Counters getCounters() { |
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276 return theCounters; |
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277 } |
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278 |
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279 void close() { |
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280 // Nothing to do here - we could destroy the counters but we put that |
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281 // in deleteAll which makes more sense as close doesn't mean deletion |
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282 // theStoreCache.dump(); |
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283 } |
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284 |
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285 void write(MangledEntry anEntry, long anExpiry, WriteEscort anEscort) |
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286 throws IOException { |
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287 |
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288 |
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289 OID myID = theStore.getNextId(); |
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290 EntrySleeveImpl mySleeve = null; |
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291 |
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292 if (theLogger.isLoggable(Level.FINE)) |
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293 theLogger.log(Level.FINE, "Written: " + myID + ", " + |
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294 anExpiry + ", " + |
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295 (anExpiry - System.currentTimeMillis())); |
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296 |
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297 mySleeve = new EntrySleeveImpl(myID, anEntry, anExpiry); |
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298 |
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299 // Ready to write but tell the escort first |
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300 OpInfo myInfo = new WriteEntryOpInfo(mySleeve); |
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301 |
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302 if (!anEscort.writing(myInfo)) |
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303 return; |
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304 |
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305 // Now make it visible |
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306 CacheBlockDescriptor myCBD = theStoreCaches[getPartition(mySleeve)].insert(mySleeve); |
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307 myCBD.release(); |
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308 |
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309 if (theLogger.isLoggable(Level.FINE)) |
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310 theLogger.log(Level.FINE, "Unwritten: " + mySleeve.getOID()); |
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311 } |
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312 |
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313 void find(MangledEntry anEntry, SearchVisitor aVisitor) |
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314 throws IOException { |
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315 |
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316 if (theConstraints.get(Fifo.class) != null) |
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317 fifoFind(anEntry, aVisitor); |
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318 else |
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319 fastFind(anEntry, aVisitor); |
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320 } |
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321 |
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322 /** |
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323 <p>If we're in FIFO mode, we know that each TupleLocator is sorted into |
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324 FIFO order. Thus we can merge across all locators on the fly |
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325 and obtain a fully ordered, non-duplicate set of tuple id's for |
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326 matching using a simply algorithm.</p> |
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327 |
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328 <p>By sorting across all locators and applying global FIFO order |
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329 we can maximize use of the cache and avoid excessive disk hits if |
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330 we have sufficient of the FIFO ordering in cache. Thus we get |
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331 graceful degradation rather than consulting disk for the definitive |
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332 ordering regardless.</p> |
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333 */ |
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334 private void fifoFind(MangledEntry anEntry, SearchVisitor aVisitor) |
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335 throws IOException { |
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336 |
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337 long mySearchStart = System.currentTimeMillis(); |
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338 |
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339 ArrayList myLocators = new ArrayList(); |
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340 |
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341 TupleLocator myLocator = theStore.find(anEntry); |
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342 |
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343 if (myLocator != null) |
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344 myLocators.add(myLocator); |
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345 |
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346 myLocator = theStore.findCached(anEntry); |
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347 |
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348 if (myLocator != null) |
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349 myLocators.add(myLocator); |
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350 |
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351 myLocator = theIndexer.find(anEntry); |
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352 |
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353 if (myLocator != null) |
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354 myLocators.add(myLocator); |
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355 |
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356 if (myLocators.size() == 0) |
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357 return; |
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358 |
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359 TupleLocator[] mySortedSources = new TupleLocator[myLocators.size()]; |
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360 |
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361 mySortedSources = (TupleLocator[]) myLocators.toArray(mySortedSources); |
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362 |
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363 myLocator = new SortingLocator(mySortedSources); |
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364 |
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365 offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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366 theTrackers[CACHED_TRACKER]); |
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367 } |
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368 |
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369 private void fastFind(MangledEntry anEntry, SearchVisitor aVisitor) |
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370 throws IOException { |
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371 |
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372 long mySearchStart = System.currentTimeMillis(); |
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373 |
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374 /* |
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375 Basic approach is to send the template to the CacheIndexer and |
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376 ask it to return suitable IDs which we will then pin and try. |
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377 Note we should set a flag which boycotts a load from disk so that |
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378 flushed or deleted entries are not loaded more than once. |
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379 |
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380 If we cannot satisfy the Visitor that way, we repeat the exercise |
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381 with storage which returns OID/byte[] pairs which we can then |
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382 pin. |
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383 |
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384 Storage and CacheIndexer are now free to plan searches as they |
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385 see fit based on template. |
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386 */ |
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387 |
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388 TupleLocator myLocator = theIndexer.find(anEntry); |
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389 |
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390 if (theLogger.isLoggable(Level.FINE)) |
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391 theLogger.log(Level.FINE, "Searching[cache]: " + myLocator); |
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392 |
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393 if (myLocator != null) { |
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394 if (offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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395 theTrackers[CACHED_TRACKER])) { |
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396 /* |
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397 System.err.println("Cache search time: " + |
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398 (System.currentTimeMillis() - |
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399 mySearchStart)); |
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400 */ |
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401 return; |
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402 } |
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403 } |
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404 |
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405 if (theLogger.isLoggable(Level.FINE)) |
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406 theLogger.log(Level.FINE, "Searching[StoreCache]: " + myLocator); |
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407 |
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408 myLocator = theStore.findCached(anEntry); |
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409 |
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410 if (myLocator != null) { |
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411 if (offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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412 theTrackers[DIRTY_TRACKER])) |
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413 return; |
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414 } |
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415 |
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416 myLocator = theStore.find(anEntry); |
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417 |
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418 if (myLocator == null) { |
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419 if (theLogger.isLoggable(Level.FINE)) |
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420 theLogger.log(Level.FINE, "Got no matches on disk"); |
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421 return; |
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422 } |
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423 |
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424 offerAndReleaseLocator(myLocator, aVisitor, mySearchStart, |
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425 theTrackers[STORAGE_TRACKER]); |
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426 } |
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427 |
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428 LongtermOffer getOffer(OID anOID) throws IOException { |
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429 |
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430 CacheBlockDescriptor myCBD = theStoreCaches[getPartition(anOID)].find(anOID); |
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431 |
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432 if (myCBD != null) { |
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433 return new LongtermOfferImpl(myCBD); |
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434 } else |
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435 return null; |
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436 } |
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437 |
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438 boolean find(SearchVisitor aVisitor, OID aOID, MangledEntry aPreload) |
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439 throws IOException { |
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440 |
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441 CacheBlockDescriptor myCBD = theStoreCaches[getPartition(aOID)].find(aOID); |
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442 |
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443 long myStartTime = System.currentTimeMillis(); |
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444 |
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445 boolean offered = false; |
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446 |
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447 if (myCBD != null) { |
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448 try { |
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449 EntrySleeveImpl mySleeve = |
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450 (EntrySleeveImpl) myCBD.getContent(); |
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451 |
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452 /* |
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453 If the JS specification is changed to cope with the issues |
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454 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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455 |
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456 (1) Allow the SearchVisitor to see Sleeve's even if they've |
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457 expired. |
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458 (2) Having "shown" it to the SearchVisitor we'd need to |
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459 query the ReapFilters and if they don't boycott, mark the |
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460 item deleted. |
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461 |
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462 These two steps have the effect of allowing a *ifExists to |
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463 conflict on lease-expired entries that have been locked |
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464 by a transaction and ensures we only delete such entries |
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465 when no transactions have posession of them anymore. Of |
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466 course, this is somewhat slower and less efficient as |
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467 there's never a circumstance under which we can be assured |
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468 that a SearchVisitor *never* sees a particular entry again. |
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469 |
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470 If we must implement the strategy of flunking a transaction |
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471 owing to a lock on a lease expired object, this would be |
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472 best dealt with by having TxnOp's check expiries at prepare |
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473 or commit time. However this is much less appealing as what |
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474 is basically a pessimistic transaction API becomes |
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475 optimistic in this case and only in this case. |
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476 |
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477 All this applies to the similar statement in offer() below. |
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478 */ |
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479 if (! mySleeve.getState().test(SleeveState.DELETED)) { |
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480 |
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481 // If it's expired, mark it deleted, subject to filters |
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482 // |
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483 if (mySleeve.hasExpired(myStartTime)) { |
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484 |
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485 if (! EntryRepositoryFactory.getReaper().filter(mySleeve)) { |
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486 mySleeve.getState().set(SleeveState.DELETED); |
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487 mySleeve.markDirty(); |
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488 |
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489 // Update stats |
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490 theCounters.didPurge(); |
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491 } |
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492 } else { |
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493 OpInfo myInfo = |
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494 new FindEntryOpInfo(theStore.getType(), |
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495 mySleeve.getOID(), |
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496 aVisitor.isDeleter()); |
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497 |
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498 SearchOffer myOffer; |
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499 |
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500 if (aPreload != null) { |
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501 myOffer = new SearchOfferImpl(aPreload, myInfo); |
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502 } else { |
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503 theLogger.log(Level.FINE, "NOT using preload"); |
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504 |
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505 myOffer = new SearchOfferImpl(mySleeve.getEntry(), |
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506 myInfo); |
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507 } |
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508 |
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509 aVisitor.offer(myOffer); |
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510 |
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511 offered = true; |
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512 } |
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513 } else { |
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514 theTrackers[CACHED_TRACKER].incDeld(); |
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515 } |
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516 } finally { |
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517 myCBD.release(); |
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518 } |
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519 } else { |
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520 theTrackers[CACHED_TRACKER].incMissed(); |
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521 } |
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522 |
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523 return offered; |
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parents:
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524 } |
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525 |
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526 private boolean offerAndReleaseLocator(TupleLocator aLocator, |
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527 SearchVisitor aVisitor, |
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528 long aStartTime, |
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529 OfferTracker aTracker) |
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530 throws IOException { |
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|
531 |
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532 try { |
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533 return offer(aLocator, aVisitor, aStartTime, aTracker); |
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534 } finally { |
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535 aLocator.release(); |
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536 } |
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parents:
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|
537 } |
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parents:
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|
538 |
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parents:
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539 /** |
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parents:
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540 @return <code>true</code> means offering can stop for better or worse. |
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541 <code>false</code> indicates that the search should continue if there |
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parents:
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542 are other sources of offers. |
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parents:
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543 */ |
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544 private boolean offer(TupleLocator aLocator, SearchVisitor aVisitor, |
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545 long aStartTime, OfferTracker aTracker) |
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546 throws IOException { |
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547 |
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548 int myVisitorResponse = SearchVisitor.TRY_AGAIN; |
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549 |
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550 OID myId = null; |
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551 EntrySleeveImpl mySleeve = null; |
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552 String myType = theStore.getType(); |
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553 boolean isDeletion = aVisitor.isDeleter(); |
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|
554 |
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555 // long myStart = System.currentTimeMillis(); |
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parents:
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|
556 |
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|
557 while (aLocator.fetchNext()) { |
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|
558 |
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559 myId = aLocator.getOID(); |
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changeset
|
560 |
17
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Add support for cache partitioning to improve concurrency.
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parents:
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diff
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561 CacheBlockDescriptor myCBD = theStoreCaches[getPartition(myId)].find(myId); |
0
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|
562 |
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563 if (myCBD != null) { |
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564 mySleeve = (EntrySleeveImpl) myCBD.getContent(); |
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|
565 |
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parents:
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566 if (! mySleeve.getState().test(SleeveState.DELETED)) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
567 |
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parents:
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|
568 // If it's expired, mark it deleted, subject to filters |
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parents:
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|
569 // |
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parents:
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570 if (mySleeve.hasExpired(aStartTime)) { |
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571 if (! EntryRepositoryFactory.getReaper().filter(mySleeve)) { |
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572 mySleeve.getState().set(SleeveState.DELETED); |
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573 mySleeve.markDirty(); |
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parents:
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|
574 |
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parents:
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|
575 // Update stats |
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parents:
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576 theCounters.didPurge(); |
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|
577 } |
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|
578 } else { |
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|
579 |
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|
580 OpInfo myInfo = |
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|
581 new FindEntryOpInfo(myType, mySleeve.getOID(), |
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|
582 isDeletion); |
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changeset
|
583 |
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parents:
diff
changeset
|
584 SearchOfferImpl myOffer = |
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|
585 new SearchOfferImpl(mySleeve.getEntry(), myInfo); |
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changeset
|
586 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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changeset
|
587 myVisitorResponse = |
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parents:
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changeset
|
588 aVisitor.offer(myOffer); |
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parents:
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changeset
|
589 } |
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parents:
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|
590 } else { |
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parents:
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|
591 aTracker.incDeld();; |
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parents:
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changeset
|
592 } |
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parents:
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|
593 |
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parents:
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|
594 myCBD.release(); |
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parents:
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changeset
|
595 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
596 if ((myVisitorResponse == SearchVisitor.STOP) || |
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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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|
597 (myVisitorResponse == SearchVisitor.ACCEPTED)) { |
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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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|
598 break; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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
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|
600 } else { |
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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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|
601 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
|
602 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
603 } |
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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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|
604 |
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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
|
605 /* |
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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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|
606 System.out.println("Time to offer: " + |
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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 (System.currentTimeMillis() - |
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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 myStart)); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
609 */ |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
610 |
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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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|
611 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:
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|
612 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
|
613 else |
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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 return false; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
615 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
616 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
617 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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618 theCounters.destroy(); |
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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 |
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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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|
620 /* |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
621 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:
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changeset
|
622 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:
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changeset
|
623 Note we should set a flag which boycotts a load from disk so that |
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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
|
624 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
|
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 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:
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|
627 with storage which returns OID/byte[] pairs which we can then |
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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
|
628 pin. |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
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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changeset
|
630 Storage and CacheIndexer are now free to plan searches as they |
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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
|
631 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:
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changeset
|
632 */ |
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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
|
633 |
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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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|
634 TupleLocator myLocator = theIndexer.find(MangledEntry.NULL_TEMPLATE); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
635 |
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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
|
636 if (theLogger.isLoggable(Level.FINE)) |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
637 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
|
638 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
639 if (myLocator != 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
|
640 delete(myLocator); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
641 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
642 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
643 if (theLogger.isLoggable(Level.FINE)) |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
644 theLogger.log(Level.FINE, "Searching[StoreCache]: " + myLocator); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
645 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
646 myLocator = theStore.findCached(MangledEntry.NULL_TEMPLATE); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
647 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
648 if (myLocator != null) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
649 delete(myLocator); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
650 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
651 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
652 myLocator = theStore.find(MangledEntry.NULL_TEMPLATE); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
653 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
654 if (myLocator == null) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
655 if (theLogger.isLoggable(Level.FINE)) |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
656 theLogger.log(Level.FINE, "Got no matches on disk"); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
657 return; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
658 } |
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 delete(myLocator); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
661 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
662 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
663 private void delete(TupleLocator aLocator) throws IOException { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
664 try { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
665 while (aLocator.fetchNext()) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
666 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
667 OID myId = aLocator.getOID(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
668 |
17
46ac1a45718a
Add support for cache partitioning to improve concurrency.
Dan Creswell <dan.creswell@gmail.com>
parents:
0
diff
changeset
|
669 CacheBlockDescriptor myCBD = theStoreCaches[getPartition(myId)].find(myId); |
0
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
670 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
671 OpInfo myInfo = null; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
672 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
673 if (myCBD != null) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
674 EntrySleeveImpl mySleeve = |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
675 (EntrySleeveImpl) myCBD.getContent(); |
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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 if (! mySleeve.getState().test(SleeveState.DELETED)) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
678 mySleeve.getState().set(SleeveState.DELETED); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
679 mySleeve.markDirty(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
680 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
681 myInfo = |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
682 new FindEntryOpInfo(theStore.getType(), |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
683 mySleeve.getOID(), |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
684 true); |
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 myCBD.release(); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
688 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
689 if (myInfo != null) { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
690 try { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
691 TxnManager.get().log(new ForcedCommit(myInfo)); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
692 } catch (TransactionException aTE) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
693 IOException myIOE = new IOException("Eeek failed to delete Entry"); |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
694 myIOE.initCause(aTE); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
695 throw myIOE; |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
696 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
697 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
698 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
699 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
700 } finally { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
701 aLocator.release(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
702 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
703 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
704 |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
705 public String toString() { |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
706 return "SC: " + theStore.getType(); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
707 } |
3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
708 } |