Mercurial > hg > blitz_stable

annotate src/org/dancres/blitz/tools/DumpEntries.java @ 35:6f68e94c1fb8 default tip

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Add CondensedStats monitoring utility, equivalent to vmstat
author Dominic Cleal <dominic-cleal@cdo2.com>
date Thu, 05 Aug 2010 11:07:25 +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.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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Dan Creswell <dan.creswell@gmail.com>
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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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Dan Creswell <dan.creswell@gmail.com>
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167
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Dan Creswell <dan.creswell@gmail.com>
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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 }