Examples of java.lang.management.CompilationMXBean

java.lang.management.CompilationMXBean
The management interface for the compilation system of the Java virtual machine.
A Java virtual machine has a single instance of the implementation class of this interface. This instance implementing this interface is an MXBean that can be obtained by calling the {@link ManagementFactory#getCompilationMXBean} method orfrom the {@link ManagementFactory#getPlatformMBeanServer platform MBeanServer} method.
The ObjectName for uniquely identifying the MXBean for the compilation system within an MBeanServer is:
{@link ManagementFactory#COMPILATION_MXBEAN_NAME java.lang:type=Compilation}
@see JMX Specification. @see Ways to Access MXBeans @author Mandy Chung @version 1.11, 11/17/05 @since 1.5

     * Test method for
     * 'java.lang.management.ManagementFactory.newPlatformMXBeanProxy(MBeanServerConnection,
     * String, Class<T>) <T>'
     */
    public void testNewPlatformMXBeanProxy_CompilationMXBean() throws Exception {
        CompilationMXBean proxy = ManagementFactory.newPlatformMXBeanProxy(
                ManagementFactory.getPlatformMBeanServer(),
                "java.lang:type=Compilation", CompilationMXBean.class);
        assertNotNull(proxy);
        CompilationMXBean mb = ManagementFactory.getCompilationMXBean();
        assertEquals(mb.getName(), proxy.getName());
        assertEquals(mb.isCompilationTimeMonitoringSupported(), proxy
                .isCompilationTimeMonitoringSupported());
    }

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      List<GarbageCollectorMXBean> gcmBeans = ManagementFactory.getGarbageCollectorMXBeans();
      for (GarbageCollectorMXBean garbageCollectorMXBean : gcmBeans) {
        initialGCTimes += garbageCollectorMXBean.getCollectionTime();
      }
      
      CompilationMXBean compMxBean = ManagementFactory.getCompilationMXBean();
      if (compMxBean.isCompilationTimeMonitoringSupported()) {
        initialCompileTimes = compMxBean.getTotalCompilationTime();
      }
      
      initialSystemLoad = ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage();
    }

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    List<GarbageCollectorMXBean> gcmBeans = ManagementFactory.getGarbageCollectorMXBeans();
    for (GarbageCollectorMXBean garbageCollectorMXBean : gcmBeans) {
      finalGCTimes += garbageCollectorMXBean.getCollectionTime();
    }
    
    CompilationMXBean compMxBean = ManagementFactory.getCompilationMXBean();
    long finalCompileTimes = 0;
    if (compMxBean.isCompilationTimeMonitoringSupported()) {
      finalCompileTimes = compMxBean.getTotalCompilationTime();
    }
    
    double averageRate = totalSent.get() / (totalSendTime.get() / 1000.0);
    double overallRate = totalAdded / ((finishTime - startTime) / 1000.0);
    
    double finalSystemLoad = ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage();
    
    if (log.isTraceEnabled()) {
      log.trace("");
      log.trace("TABLET SERVER BATCH WRITER STATISTICS");
      log.trace(String.format("Added                : %,10d mutations", totalAdded));
      log.trace(String.format("Sent                 : %,10d mutations", totalSent.get()));
      log.trace(String.format("Resent percentage   : %10.2f%s", (totalSent.get() - totalAdded) / (double) totalAdded * 100.0, "%"));
      log.trace(String.format("Overall time         : %,10.2f secs", (finishTime - startTime) / 1000.0));
      log.trace(String.format("Overall send rate    : %,10.2f mutations/sec", overallRate));
      log.trace(String.format("Send efficiency      : %10.2f%s", overallRate / averageRate * 100.0, "%"));
      log.trace("");
      log.trace("BACKGROUND WRITER PROCESS STATISTICS");
      log.trace(String.format("Total send time      : %,10.2f secs %6.2f%s", totalSendTime.get() / 1000.0, 100.0 * totalSendTime.get()
          / (finishTime - startTime), "%"));
      log.trace(String.format("Average send rate    : %,10.2f mutations/sec", averageRate));
      log.trace(String.format("Total bin time       : %,10.2f secs %6.2f%s", totalBinTime.get() / 1000.0,
          100.0 * totalBinTime.get() / (finishTime - startTime), "%"));
      log.trace(String.format("Average bin rate     : %,10.2f mutations/sec", totalBinned.get() / (totalBinTime.get() / 1000.0)));
      log.trace(String.format("tservers per batch   : %,8.2f avg  %,6d min %,6d max", tabletServersBatchSum / (double) numBatches, minTabletServersBatch,
          maxTabletServersBatch));
      log.trace(String.format("tablets per batch    : %,8.2f avg  %,6d min %,6d max", tabletBatchSum / (double) numBatches, minTabletBatch, maxTabletBatch));
      log.trace("");
      log.trace("SYSTEM STATISTICS");
      log.trace(String.format("JVM GC Time          : %,10.2f secs", ((finalGCTimes - initialGCTimes) / 1000.0)));
      if (compMxBean.isCompilationTimeMonitoringSupported()) {
        log.trace(String.format("JVM Compile Time     : %,10.2f secs", (finalCompileTimes - initialCompileTimes) / 1000.0));
      }
      log.trace(String.format("System load average : initial=%6.2f final=%6.2f", initialSystemLoad, finalSystemLoad));
    }
  }

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        metrics.add(new Metric(UNLOADED_CLASS_COUNT,
                timestamp, bean.getUnloadedClassCount()));
    }


    private void addCompilationMetrics(long timestamp, MetricList metrics) {
        CompilationMXBean bean = ManagementFactory.getCompilationMXBean();
        metrics.add(new Metric(TOTAL_COMPILATION_TIME, timestamp, bean.getTotalCompilationTime()));
    }

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                log.warning( "Unknown memory type found: " + mpb.getType() );
            }
        }
        // Other useful beans:
        this.memoryBean = ManagementFactory.getMemoryMXBean();
        CompilationMXBean cb = ManagementFactory.getCompilationMXBean();
        if( cb.isCompilationTimeMonitoringSupported() ) {
            this.compilationBean = cb;
        }
        this.classLoaderBean = ManagementFactory.getClassLoadingMXBean();
        // Automatically start the timing:
        this.start();

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      List<GarbageCollectorMXBean> gcmBeans = ManagementFactory.getGarbageCollectorMXBeans();
      for (GarbageCollectorMXBean garbageCollectorMXBean : gcmBeans) {
        initialGCTimes += garbageCollectorMXBean.getCollectionTime();
      }
      
      CompilationMXBean compMxBean = ManagementFactory.getCompilationMXBean();
      if (compMxBean.isCompilationTimeMonitoringSupported()) {
        initialCompileTimes = compMxBean.getTotalCompilationTime();
      }
      
      initialSystemLoad = ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage();
    }

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    List<GarbageCollectorMXBean> gcmBeans = ManagementFactory.getGarbageCollectorMXBeans();
    for (GarbageCollectorMXBean garbageCollectorMXBean : gcmBeans) {
      finalGCTimes += garbageCollectorMXBean.getCollectionTime();
    }
    
    CompilationMXBean compMxBean = ManagementFactory.getCompilationMXBean();
    long finalCompileTimes = 0;
    if (compMxBean.isCompilationTimeMonitoringSupported()) {
      finalCompileTimes = compMxBean.getTotalCompilationTime();
    }
    
    double averageRate = totalSent.get() / (totalSendTime.get() / 1000.0);
    double overallRate = totalAdded / ((finishTime - startTime) / 1000.0);
    
    double finalSystemLoad = ManagementFactory.getOperatingSystemMXBean().getSystemLoadAverage();
    
    if (log.isTraceEnabled()) {
      log.trace("");
      log.trace("TABLET SERVER BATCH WRITER STATISTICS");
      log.trace(String.format("Added                : %,10d mutations", totalAdded));
      log.trace(String.format("Sent                 : %,10d mutations", totalSent.get()));
      log.trace(String.format("Resent percentage   : %10.2f%s", (totalSent.get() - totalAdded) / (double) totalAdded * 100.0, "%"));
      log.trace(String.format("Overall time         : %,10.2f secs", (finishTime - startTime) / 1000.0));
      log.trace(String.format("Overall send rate    : %,10.2f mutations/sec", overallRate));
      log.trace(String.format("Send efficiency      : %10.2f%s", overallRate / averageRate * 100.0, "%"));
      log.trace("");
      log.trace("BACKGROUND WRITER PROCESS STATISTICS");
      log.trace(String.format("Total send time      : %,10.2f secs %6.2f%s", totalSendTime.get() / 1000.0, 100.0 * totalSendTime.get()
          / (finishTime - startTime), "%"));
      log.trace(String.format("Average send rate    : %,10.2f mutations/sec", averageRate));
      log.trace(String.format("Total bin time       : %,10.2f secs %6.2f%s", totalBinTime.get() / 1000.0,
          100.0 * totalBinTime.get() / (finishTime - startTime), "%"));
      log.trace(String.format("Average bin rate     : %,10.2f mutations/sec", totalBinned.get() / (totalBinTime.get() / 1000.0)));
      log.trace(String.format("tservers per batch   : %,8.2f avg  %,6d min %,6d max", (tabletServersBatchSum / (double) numBatches), minTabletServersBatch,
          maxTabletServersBatch));
      log.trace(String.format("tablets per batch    : %,8.2f avg  %,6d min %,6d max", (tabletBatchSum / (double) numBatches), minTabletBatch, maxTabletBatch));
      log.trace("");
      log.trace("SYSTEM STATISTICS");
      log.trace(String.format("JVM GC Time          : %,10.2f secs", ((finalGCTimes - initialGCTimes) / 1000.0)));
      if (compMxBean.isCompilationTimeMonitoringSupported()) {
        log.trace(String.format("JVM Compile Time     : %,10.2f secs", ((finalCompileTimes - initialCompileTimes) / 1000.0)));
      }
      log.trace(String.format("System load average : initial=%6.2f final=%6.2f", initialSystemLoad, finalSystemLoad));
    }
  }

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        for (final Entry<String, String> property : systemProperties.entrySet()) {
            outPW.printf(INDENT_KEY_VALUE_FORMAT, property.getKey(), property.getValue()).println();
        }
        outPW.println();
        // JIT information
        final CompilationMXBean compilationMXBean = ManagementFactory.getCompilationMXBean();
        if( compilationMXBean != null ) {
            outPW.printf(KEY_VALUE_FORMAT, "JIT compiler", compilationMXBean.getName()).println();
            outPW.printf(INDENT_KEY_VALUE_FORMAT, "total compile time", printDuration(compilationMXBean.getTotalCompilationTime())).println();
        }
    }

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