Mercurial > hg > blitz_condensed
annotate examples/statsclient/stats/TestClient.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 stats; |
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2 |
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3 import java.rmi.RMISecurityManager; |
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4 |
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5 import java.net.InetAddress; |
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6 |
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7 import net.jini.space.JavaSpace; |
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8 |
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9 import net.jini.core.entry.Entry; |
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10 |
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11 import net.jini.core.lease.Lease; |
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12 |
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13 import net.jini.admin.Administrable; |
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14 |
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15 import org.dancres.blitz.remote.StatsAdmin; |
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16 |
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17 import org.dancres.blitz.stats.*; |
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18 |
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19 /** |
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20 A Blitz specific example. This client locates a JavaSpace and checks |
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21 for the Blitz admin interfaces. If the JavaSpace has these interfaces |
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22 the program proceeds to recover the currently active statistics, |
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23 activates some additional statistics, generates some activity (via a |
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24 Write to the space) and then prints out the new statistics. |
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25 */ |
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26 public class TestClient { |
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27 public static void main(String args[]) { |
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28 try { |
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29 /* |
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30 Make sure we've installed the RMI security manager otherwise we |
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31 won't be able to download code. |
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32 */ |
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33 if (System.getSecurityManager() == null) |
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34 System.setSecurityManager(new RMISecurityManager()); |
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35 |
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36 /* |
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37 Locates an already running service - WILL NOT notice Space |
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38 instances run after Lookup is started. |
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39 */ |
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40 Lookup myFinder = new Lookup(JavaSpace.class); |
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41 |
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42 /* |
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43 Locate JavaSpace service. |
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44 */ |
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45 JavaSpace mySpace = (JavaSpace) myFinder.getService(); |
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46 |
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47 /* |
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48 Blitz is Administrable so if the current proxy isn't we haven't |
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49 found a Blitz instance |
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50 */ |
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51 if (! (mySpace instanceof Administrable)) { |
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52 System.out.println("Whoops, this space isn't administrable"); |
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53 return; |
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54 } |
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55 |
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56 Object myAdmin = ((Administrable) mySpace).getAdmin(); |
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57 |
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58 /* |
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59 If the AdminProxy doesn't have a StatsAdmin it's not Blitz. |
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60 */ |
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61 if (! (myAdmin instanceof StatsAdmin)) { |
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62 System.out.println("Whoops, this space hasn't got a StatsAdmin - can't be Blitz"); |
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63 return; |
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64 } |
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65 |
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66 /* |
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67 Stats access is via StatsAdmin on the Admin proxy. |
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68 */ |
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69 StatsAdmin myStatsAdmin = (StatsAdmin) myAdmin; |
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70 |
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71 /* |
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72 Display current stats |
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73 */ |
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74 Stat[] myStats = myStatsAdmin.getStats(); |
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75 |
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76 System.out.println("Stats are currently:"); |
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77 dumpStats(myStats); |
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78 |
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79 /* |
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80 Enable tracking of takes and writes for TestEntry |
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81 (we could enable tracking for all types) |
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82 */ |
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83 OpSwitch myOpSwitch1 = new OpSwitch(TestEntry.class.getName(), |
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84 OpSwitch.WRITE_OPS, true); |
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85 OpSwitch myOpSwitch2 = new OpSwitch(TestEntry.class.getName(), |
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86 OpSwitch.TAKE_OPS, true); |
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87 |
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88 /* |
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89 Enable instance counts for all types (could specify |
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90 particular types if we wish). |
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91 */ |
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92 InstanceSwitch myInstSwitch = |
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93 new InstanceSwitch(InstanceSwitch.ALL_TYPES, true); |
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94 |
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95 Switch[] mySwitches = new Switch[3]; |
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96 mySwitches[0] = myOpSwitch1; |
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97 mySwitches[1] = myOpSwitch2; |
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98 mySwitches[2] = myInstSwitch; |
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99 |
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100 myStatsAdmin.setSwitches(mySwitches); |
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101 |
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102 |
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103 System.out.println(); |
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104 System.out.println("Set switches, doing write"); |
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105 System.out.println(); |
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106 |
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107 /* |
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108 Write a TestEntry |
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109 */ |
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110 mySpace.write(new TestEntry("blah"), null, Lease.FOREVER); |
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111 |
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112 myStats = myStatsAdmin.getStats(); |
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113 |
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114 /* |
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115 Does it appear in the stats? |
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116 */ |
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117 System.out.println("Stats are now:"); |
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118 dumpStats(myStats); |
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119 |
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120 } catch (Exception aRE) { |
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121 System.err.println("Ooops"); |
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122 aRE.printStackTrace(System.err); |
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123 } |
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124 } |
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125 |
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126 public static class TestEntry implements Entry { |
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127 public String theName; |
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128 |
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129 public TestEntry(String aName) { |
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130 theName = aName; |
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131 } |
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132 } |
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133 |
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134 private static void dumpStats(Stat[] aStats) { |
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135 for (int i = 0; i < aStats.length; i++) { |
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136 |
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137 if (aStats[i] instanceof InstanceCount) { |
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138 InstanceCount myCount = (InstanceCount) aStats[i]; |
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139 System.out.println("Instances of type " + |
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140 myCount.getType() + " = " + |
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141 myCount.getCount()); |
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142 |
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143 } else if (aStats[i] instanceof TxnStat) { |
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144 TxnStat myTxns = (TxnStat) aStats[i]; |
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145 System.out.println("Total active txns: " + |
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146 myTxns.getActiveTxnCount()); |
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147 |
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148 } else if (aStats[i] instanceof OpStat) { |
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149 OpStat myOp = (OpStat) aStats[i]; |
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150 System.out.println("Total " + myOp.getOpTypeAsString() + |
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151 " on " + myOp.getType() + " = " + |
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152 myOp.getCount()); |
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153 |
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154 } else if (aStats[i] instanceof MemoryStat) { |
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155 MemoryStat myMem = (MemoryStat) aStats[i]; |
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156 System.out.println("Memory used: " + |
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157 myMem.getCurrentMemory() + " out of " + |
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158 myMem.getMaxMemory()); |
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159 } else if (aStats[i] instanceof BlockingOpsStat) { |
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160 BlockingOpsStat myBlockers = (BlockingOpsStat) aStats[i]; |
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161 System.out.println("Blocking reads: " + |
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162 myBlockers.getReaders() + " takes: " + |
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163 myBlockers.getTakers()); |
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164 } else if (aStats[i] instanceof HostStat) { |
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165 HostStat myHostStat = (HostStat) aStats[i]; |
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166 |
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167 System.out.println("Default host address: " + |
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168 myHostStat.getHostAddr()); |
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169 InetAddress[] myIfAddrs = myHostStat.getAllAddr(); |
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170 |
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171 System.out.println("All known interface addresses"); |
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172 for (int j = 0; j < myIfAddrs.length; j++) { |
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173 System.out.println(myIfAddrs[j]); |
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174 } |
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175 } else |
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176 System.out.println(aStats[i]); |
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177 } |
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178 } |
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179 } |