StatisticsThread.java

   1 package org.argeo.cms.jcr.internal;
   2
   3 import java.io.File;
   4 import java.lang.management.ManagementFactory;
   5
   6 import org.apache.commons.logging.Log;
   7 import org.apache.commons.logging.LogFactory;
   8 import org.apache.jackrabbit.api.stats.RepositoryStatistics;
   9 import org.apache.jackrabbit.stats.RepositoryStatisticsImpl;
  10
  11 /**
  12  * Background thread started by the kernel, which gather statistics and
  13  * monitor/control other processes.
  14  */
  15 public class StatisticsThread extends Thread {
  16         private final static Log log = LogFactory.getLog(StatisticsThread.class);
  17
  18         private RepositoryStatisticsImpl repoStats;
  19
  20         /** The smallest period of operation, in ms */
  21         private final long PERIOD = 60 * 1000l;
  22         /** One ms in ns */
  23         private final static long m = 1000l * 1000l;
  24         private final static long M = 1024l * 1024l;
  25
  26         private boolean running = true;
  27
  28         private Log kernelStatsLog = LogFactory.getLog("argeo.stats.kernel");
  29         private Log nodeStatsLog = LogFactory.getLog("argeo.stats.node");
  30
  31         @SuppressWarnings("unused")
  32         private long cycle = 0l;
  33
  34         public StatisticsThread(String name) {
  35                 super(name);
  36         }
  37
  38         private void doSmallestPeriod() {
  39                 // Clean expired sessions
  40                 // FIXME re-enable it in CMS
  41                 //CmsSessionImpl.closeInvalidSessions();
  42
  43                 if (kernelStatsLog.isDebugEnabled()) {
  44                         StringBuilder line = new StringBuilder(64);
  45                         line.append("§\t");
  46                         long freeMem = Runtime.getRuntime().freeMemory() / M;
  47                         long totalMem = Runtime.getRuntime().totalMemory() / M;
  48                         long maxMem = Runtime.getRuntime().maxMemory() / M;
  49                         double loadAvg = ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage();
  50                         // in min
  51                         boolean min = true;
  52                         long uptime = ManagementFactory.getRuntimeMXBean().getUptime() / (1000 * 60);
  53                         if (uptime > 24 * 60) {
  54                                 min = false;
  55                                 uptime = uptime / 60;
  56                         }
  57                         line.append(uptime).append(min ? " min" : " h").append('\t');
  58                         line.append(loadAvg).append('\t').append(maxMem).append('\t').append(totalMem).append('\t').append(freeMem)
  59                                         .append('\t');
  60                         kernelStatsLog.debug(line);
  61                 }
  62
  63                 if (nodeStatsLog.isDebugEnabled()) {
  64                         File dataDir = KernelUtils.getOsgiInstanceDir();
  65                         long freeSpace = dataDir.getUsableSpace() / M;
  66                         // File currentRoot = null;
  67                         // for (File root : File.listRoots()) {
  68                         // String rootPath = root.getAbsolutePath();
  69                         // if (dataDir.getAbsolutePath().startsWith(rootPath)) {
  70                         // if (currentRoot == null
  71                         // || (rootPath.length() > currentRoot.getPath()
  72                         // .length())) {
  73                         // currentRoot = root;
  74                         // }
  75                         // }
  76                         // }
  77                         // long totalSpace = currentRoot.getTotalSpace();
  78                         StringBuilder line = new StringBuilder(128);
  79                         line.append("§\t").append(freeSpace).append(" MB left in " + dataDir);
  80                         line.append('\n');
  81                         if (repoStats != null)
  82                                 for (RepositoryStatistics.Type type : RepositoryStatistics.Type.values()) {
  83                                         long[] vals = repoStats.getTimeSeries(type).getValuePerMinute();
  84                                         long val = vals[vals.length - 1];
  85                                         line.append(type.name()).append('\t').append(val).append('\n');
  86                                 }
  87                         nodeStatsLog.debug(line);
  88                 }
  89         }
  90
  91         @Override
  92         public void run() {
  93                 if (log.isTraceEnabled())
  94                         log.trace("Kernel thread started.");
  95                 final long periodNs = PERIOD * m;
  96                 while (running) {
  97                         long beginNs = System.nanoTime();
  98                         doSmallestPeriod();
  99
 100                         long waitNs = periodNs - (System.nanoTime() - beginNs);
 101                         if (waitNs < 0)
 102                                 continue;
 103                         // wait
 104                         try {
 105                                 sleep(waitNs / m, (int) (waitNs % m));
 106                         } catch (InterruptedException e) {
 107                                 // silent
 108                         }
 109                         cycle++;
 110                 }
 111         }
 112
 113         public synchronized void destroyAndJoin() {
 114                 running = false;
 115                 notifyAll();
 116 //              interrupt();
 117 //              try {
 118 //                      join(PERIOD * 2);
 119 //              } catch (InterruptedException e) {
 120 //                      // throw new CmsException("Kernel thread destruction was interrupted");
 121 //                      log.error("Kernel thread destruction was interrupted", e);
 122 //              }
 123         }
 124 }