Mercurial > hg > blitz_condensed
annotate test/org/dancres/blitz/arc/ArcTest.java @ 34:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
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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 } |