Mercurial > hg > blitz_condensed

annotate src/org/dancres/blitz/tools/MonitorStats.java @ 34:6f68e94c1fb8 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 import java.rmi.RMISecurityManager;
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5 import java.rmi.RemoteException;
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6
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7 import net.jini.admin.Administrable;
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8 import net.jini.space.JavaSpace;
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9
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10 import org.dancres.blitz.remote.StatsAdmin;
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11 import org.dancres.blitz.stats.Stat;
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12 import org.dancres.jini.util.DiscoveryUtil;
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13 import org.dancres.jini.util.ServiceLocator;
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14
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15 /**
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16 <p>MonitorStats accepts a spacename as an argument and a loop time. It then
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17 attempts to list all available statistics on the space every loop time
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18 seconds. Specifying a loop time of 0 will cause MonitorStats to dump
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19 stats once and exit.</p>
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20
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21 <p>Typical usage:
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22
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23 <pre>
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24 java -Xmx256m -Djava.security.policy=config/policy.all
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25 -classpath /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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26 org.dancres.blitz.tools.MonitorStats dancres 20
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27 </pre>
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28
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29 @see org.dancres.blitz.remote.BlitzAdmin
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30 */
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31 public class MonitorStats {
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32 private static final long MAX_DISCOVER_TIME = 15 * 1000;
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33
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34 public static void main(String args[]) {
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35 new MonitorStats().startup(args);
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36 }
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37
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38 void startup(String args[]) {
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39 if (System.getSecurityManager() == null)
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40 System.setSecurityManager(new RMISecurityManager());
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41
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42 try {
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43 try {
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44 long myTimeout = 20 * 1000;
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45
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46 Object myProxy = null;
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47
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48 if (args.length == 2) {
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49 myProxy = ServiceLocator.getService(JavaSpace.class,
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50 args[0],
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51 MAX_DISCOVER_TIME);
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52 myTimeout = Integer.parseInt(args[1]) * 1000;
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53 } else if (args.length == 3) {
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54 myProxy = ServiceLocator.getService(args[0],
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55 JavaSpace.class,
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56 args[1]);
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57 myTimeout = Integer.parseInt(args[2]) * 1000;
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58 } else {
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59 System.err.println(
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60 "Wrong number of arguments - should be <spacename> <seconds> or <LUS host> <spacename> <seconds>");
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61 System.exit(-1);
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62 }
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63
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64 if (myProxy != null) {
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65 System.err.println("Found space: " + myProxy);
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66
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67 DiscoveryUtil.dumpInterfaces(myProxy.getClass());
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68
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69 if (DiscoveryUtil.hasInterface(myProxy,
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70 Administrable.class)) {
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71 Administrable myAdmin = (Administrable) myProxy;
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72
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73 Object myAdminProxy = myAdmin.getAdmin();
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74
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75 DiscoveryUtil.dumpInterfaces(myAdminProxy.getClass());
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76
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77 if (DiscoveryUtil.hasInterface(myAdminProxy,
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78 StatsAdmin.class)) {
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79 StatsAdmin myStatsAdmin =
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80 (StatsAdmin) myAdminProxy;
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81
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82 getWatcher(myStatsAdmin, myTimeout).run();
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83 } else {
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84 System.err.println("No BlitzAdmin interface found - can't be Blitz");
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85 }
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86 } else {
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87 System.err.println("No admin interface present - can't be Blitz");
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88 }
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89 }
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90 } catch (InterruptedException anIE) {
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91 System.err.println("!!! Whoops service not found :( !!!");
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92 }
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93 } catch (ClassNotFoundException aCNFE) {
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94 System.err.println("ClassNotFound exception");
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95 aCNFE.printStackTrace(System.err);
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96 } catch (RemoteException anRE) {
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97 System.err.println("Remote exception");
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98 anRE.printStackTrace(System.err);
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99 } catch (IOException anIOE) {
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100 System.err.println("Failed to configure discovery");
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101 anIOE.printStackTrace(System.err);
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102 }
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103 }
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104
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105 Runnable getWatcher(StatsAdmin anAdmin, long aTimeout) {
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106 return new Watcher(anAdmin, aTimeout);
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107 }
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108
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109 static class Watcher implements Runnable {
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110 private StatsAdmin theAdmin;
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111 private long theTimeout;
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112
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113 Watcher(StatsAdmin anAdmin, long aTimeout) {
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114 theAdmin = anAdmin;
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115 theTimeout = aTimeout;
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116 }
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117
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118 public void run() {
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119 do {
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120 try {
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121 Stat[] myStats = theAdmin.getStats();
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122
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123 System.out.println("Snapshot: " +
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124 System.currentTimeMillis());
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125 for (int i = 0; i < myStats.length; i++) {
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126 System.out.println(myStats[i]);
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127 }
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128
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129 System.out.println();
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130
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131 Thread.sleep(theTimeout);
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132 } catch (Exception anE) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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133 System.err.println(anE);
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134 }
34
6f68e94c1fb8 Add CondensedStats monitoring utility, equivalent to vmstat
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135 } while (theTimeout > 0); // if timeout == 0, only run once
0
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136 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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137 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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138 }