org.argeo.cms/src/org/argeo/cms/internal/kernel/KernelThread.java

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