Mercurial > hg > blitz_stable

annotate test/org/dancres/blitz/arc/ArcTest.java @ 18:4580bb12db30

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Separate command execution from command logging.
author Dan Creswell <dan.creswell@gmail.com>
date Sun, 05 Jul 2009 16:26:25 +0100
parents 3dc0c5604566
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 package org.dancres.blitz.arc;
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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.HashMap;
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6 import java.util.Random;
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7
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8 import org.dancres.blitz.cache.Identifiable;
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9 import org.dancres.blitz.cache.Identifier;
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10
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11 public class ArcTest {
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12 private static Random theRNG = new Random();
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13 private static int theMaxEntries;
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14 private static ArcCache theCache;
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15
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16 public static void main(String args[]) {
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17 BackingStore myStore = new BackingStoreImpl();
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18
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19 System.out.println("ArcTest with CacheSize: " + args[0] +
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20 " Max Entry:" + args[1]);
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21
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22 theCache = new ArcCache(myStore, Integer.parseInt(args[0]));
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23
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24 theMaxEntries = Integer.parseInt(args[1]);
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25
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26 try {
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27 // Write the entries in
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28 for (int i = 0; i < theMaxEntries; i++) {
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29 IdentifierImpl myId = new IdentifierImpl(i);
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30 Element myElement = new Element(myId, i);
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31 theCache.insert(myElement);
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32 }
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33
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34 while (true) {
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35 int myChoice = theRNG.nextInt(2);
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36
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37 switch(myChoice) {
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38 case 0 : {
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39 randomSelect();
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40 break;
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41 }
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42
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43 case 1 : {
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44 randomRange();
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45 break;
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46 }
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47 }
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48 }
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49 } catch (Exception anE) {
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50 System.err.println("Exceptioned");
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51 anE.printStackTrace(System.err);
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52 }
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53 }
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54
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55 private static final void randomSelect() throws Exception {
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56 // Random select
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57 int myInt = theRNG.nextInt(theMaxEntries);
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58
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59 System.out.println("Random: " + myInt);
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60 CacheBlockDescriptor myCBD =
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61 theCache.find(new IdentifierImpl(myInt));
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62
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63 myCBD.release();
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64 }
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65
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66 private static final void randomRange() throws Exception {
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67 // Random start point
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68 int myStart = theRNG.nextInt(theMaxEntries);
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69
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70 int myLength = theRNG.nextInt((theMaxEntries - myStart));
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71
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72 System.out.println("Linear: " + myStart + ", " + myLength);
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73
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74 for (int i = myStart; i < (myStart + myLength); i++) {
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75 CacheBlockDescriptor myCBD =
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76 theCache.find(new IdentifierImpl(i));
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77
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78 myCBD.release();
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79 }
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80 }
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81
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82 private static final class IdentifierImpl implements Identifier {
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83 private int theInt;
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84
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85 IdentifierImpl(int anInt) {
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86 theInt = anInt;
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87 }
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88
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89 public boolean equals(Object anObject) {
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90 if (anObject instanceof IdentifierImpl) {
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91 IdentifierImpl myOther = (IdentifierImpl) anObject;
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92
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93 return (myOther.theInt == theInt);
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94 }
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95
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96 return false;
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97 }
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98
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99 public int hashCode() {
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100 return theInt;
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101 }
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102
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103 public int compareTo(Object anObject) {
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104 IdentifierImpl myOther = (IdentifierImpl) anObject;
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105
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106 return theInt - myOther.theInt;
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107 }
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108
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109 public String toString() {
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110 return "Id: " + theInt;
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111 }
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112 }
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113
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114 private static final class Element implements Identifiable {
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115 private IdentifierImpl theId;
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116 private int theVal;
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117
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118 Element(IdentifierImpl anId, int aVal) {
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119 theId = anId;
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120 theVal = aVal;
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121 }
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122
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123 public Identifier getId() {
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124 return theId;
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125 }
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126
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127 public String toString() {
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128 return "Element: " + theVal;
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129 }
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130 }
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131
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132 private static final class BackingStoreImpl implements BackingStore {
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133 private HashMap thePrepared = new HashMap();
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134 private HashMap theStorage = new HashMap();
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135
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136 public String getName() {
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137 return "ArcTest::BackingStoreImpl";
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138 }
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139
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140 public void prepareForCaching(Identifiable anIdentifiable) {
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141 synchronized(thePrepared) {
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142 thePrepared.put(anIdentifiable.getId(), anIdentifiable);
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143 }
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144 }
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145
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146 /**
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147 @return Identifiable associated with Identifier or <code>null</code>
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148 if it cannot be found.
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149 */
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150 public Identifiable load(Identifier anId) throws IOException {
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151 Identifiable myIdent;
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152
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153 // First check prepcache
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154 synchronized(thePrepared) {
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155 myIdent = (Identifiable) thePrepared.remove(anId);
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156
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157 if (myIdent != null) {
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158 synchronized(theStorage) {
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159 theStorage.put(anId, myIdent);
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160 }
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161
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162 return myIdent;
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163 }
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164 }
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165
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166 synchronized(theStorage) {
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167 myIdent = (Identifiable) theStorage.get(anId);
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168
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169 if (myIdent == null) {
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170 System.err.println("Panic: storage lost entry");
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171 throw new RuntimeException();
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172 } else
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173 return myIdent;
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174 }
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175 }
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176
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177 /**
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178 Must deal with handling of delete, update and write.
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179 */
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180 public void save(Identifiable anIdentifiable) throws IOException {
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181 // Nothing for us to do in this case
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182 }
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183
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184 public void force() throws IOException {
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185 // Nothing for us to do in this case
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186 }
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187 }
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188 }