Mercurial > hg > blitz_stable
annotate src/org/dancres/blitz/tools/DumpEntries.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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0
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1 package org.dancres.blitz.tools; |
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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.rmi.RMISecurityManager; |
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6 |
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7 import org.dancres.blitz.disk.Disk; |
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8 import org.dancres.blitz.disk.DiskTxn; |
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9 |
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10 import org.dancres.blitz.config.ConfigurationFactory; |
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11 |
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12 import org.dancres.blitz.entry.EntryRepositoryFactory; |
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13 import org.dancres.blitz.entry.EntryRepository; |
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14 import org.dancres.blitz.entry.SearchVisitor; |
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15 import org.dancres.blitz.entry.SearchOffer; |
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16 |
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17 import org.dancres.blitz.mangler.MangledEntry; |
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18 import org.dancres.blitz.mangler.EntryMangler; |
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19 |
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20 /** |
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21 <p>DumpEntries performs an off-line dump of the contents of a Blitz |
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22 instance.</p> |
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23 |
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24 <p><b>WARNING:</b> <em>DO NOT</em> run this tool against an active space |
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25 instance's databases. Shut it down first using |
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26 <code>SyncAndShutdown</code>.</p> |
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27 |
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28 <p>Single required argument is the configuration file for the space instance |
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29 whose contents you wish to dump. By default, the tool will print both |
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30 internal Entry information associated with storage functions <em>and</em> |
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31 attempt to unpack the Entry instance and display it on |
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32 <code>System.out</code>. The displaying of unpacked Entry instances may |
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33 be problematic in cases such as when a codebase is not available thus |
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34 this step can be disabled by passing in <code>-Dnounpack=true</code>.</p> |
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35 |
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36 <p>Typical usages: |
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37 |
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38 <pre> |
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39 java -Xmx256m -Djava.security.policy=config/policy.all |
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40 -classpath /home/dan/lib/db.jar:/home/dan/jini/jini2_0/lib/jsk-platform.jar:/home/dan/src/jini/space/build:/home/dan/jini/jini2_0/lib/jini-ext.jar:/home/dan/jini/jini2_0/lib/sun-util.jar |
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41 org.dancres.blitz.tools.DumpEntries config/blitz.config |
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42 |
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43 java -Dnounpack=true -Xmx256m -Djava.security.policy=config/policy.all |
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44 -classpath /home/dan/lib/db.jar:/home/dan/jini/jini2_0/lib/jsk-platform.jar:/home/dan/src/jini/space/build:/home/dan/jini/jini2_0/lib/jini-ext.jar:/home/dan/jini/jini2_0/lib/sun-util.jar |
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45 org.dancres.blitz.tools.DumpEntries config/blitz.config |
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46 </pre> |
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47 </p> |
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48 |
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49 <p>This tool is non-destructive so it's perfectly possible to shut a |
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50 Blitz instance down using <code>SyncAndShutdown</code>, |
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51 run this tool and then restart the space.</p> |
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52 |
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53 <p>It's also worth mentioning that, because Blitz's transient mode is |
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54 still disk backed to allow for swapping, this tool can be used to examine |
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55 the contents of a transient Blitz instance shutdown with <code> |
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56 SyncAndShutdown</code>.</p> |
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57 |
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58 @see org.dancres.blitz.tools.SyncAndShutdown |
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59 */ |
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60 public class DumpEntries { |
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61 public static void main(String args[]) { |
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62 if (args.length != 1) { |
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63 System.err.println("Usage: DumpEntries <config_file>"); |
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64 System.exit(-1); |
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65 } |
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66 |
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67 /** |
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68 We need this to access codebases for objects |
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69 */ |
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70 System.setSecurityManager(new RMISecurityManager()); |
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71 |
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72 try { |
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73 ConfigurationFactory.setup(args); |
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74 |
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75 Disk.init(); |
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76 |
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77 String[] myKnownTypes = |
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78 EntryRepositoryFactory.get().get(EntryRepository.ROOT_TYPE).getSubtypes(); |
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79 |
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80 for (int i = 0; i < myKnownTypes.length; i++) { |
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81 EntryRepository myRepos = |
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82 EntryRepositoryFactory.get().get(myKnownTypes[i]); |
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83 |
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84 System.out.println("Repository: " + myKnownTypes[i]); |
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85 dumpRepos(myRepos); |
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86 |
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87 System.out.println(""); |
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88 } |
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89 |
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90 } catch (IOException anIOE) { |
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91 System.err.println("Yikes, got I/O problems"); |
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92 anIOE.printStackTrace(System.err); |
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93 } finally { |
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94 try { |
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95 Disk.stop(); |
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96 } catch (Exception anE) { |
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97 System.err.println("Warning failed to close Disk properly"); |
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98 anE.printStackTrace(System.err); |
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99 } |
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100 } |
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101 } |
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102 |
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103 private static void dumpRepos(EntryRepository aRepos) throws IOException { |
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104 if (aRepos == null) { |
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105 System.out.println("Empty"); |
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106 return; |
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107 } |
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108 |
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109 DiskTxn myTxn = DiskTxn.newTxn(); |
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110 |
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111 try { |
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112 if (aRepos.noSchemaDefined()) { |
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113 System.out.println("Has No Schema"); |
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114 return; |
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115 } |
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116 |
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117 if (aRepos.getTotalStoredEntries() == 0) { |
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118 System.out.println("No entries"); |
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119 return; |
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120 } else { |
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121 System.out.println("Total entries: " + |
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122 aRepos.getTotalStoredEntries()); |
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123 } |
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124 |
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125 System.out.println(""); |
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126 DumpVisitor myVisitor = new DumpVisitor(); |
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127 |
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128 aRepos.find(MangledEntry.NULL_TEMPLATE, myVisitor); |
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129 |
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130 System.out.println("Lease expired entries (ignored): " + |
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131 (aRepos.getTotalStoredEntries() - myVisitor.getTotalEntries())); |
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132 } finally { |
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133 myTxn.commit(); |
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134 } |
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135 } |
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136 |
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137 private static final class DumpVisitor implements SearchVisitor { |
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138 private EntryMangler theMangler = new EntryMangler(); |
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139 private int theTotalEntries; |
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140 |
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141 public int offer(SearchOffer anOffer) { |
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142 |
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143 ++theTotalEntries; |
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144 |
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145 MangledEntry myEntry = anOffer.getEntry(); |
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146 myEntry.dump(System.out); |
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147 |
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148 System.out.println(); |
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149 |
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150 if (!Boolean.getBoolean("nounpack")) { |
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151 try { |
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152 System.out.println("Unpacked Entry.toString(): " + theMangler.unMangle(myEntry)); |
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153 } catch (Exception anE) { |
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154 System.err.println("Couldn't unpack entry"); |
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155 anE.printStackTrace(System.err); |
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156 } |
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157 } else { |
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158 System.out.println("Unpack disabled"); |
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159 } |
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160 |
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161 System.out.println(""); |
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162 System.out.println("--------------------------------------------"); |
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163 System.out.println(""); |
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164 |
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165 return SearchVisitor.TRY_AGAIN; |
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166 } |
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167 |
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168 int getTotalEntries() { |
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169 return theTotalEntries; |
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170 } |
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171 |
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172 public boolean isDeleter() { |
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173 return false; |
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174 } |
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175 } |
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176 } |