public BigDecimal calculate( MonetaryAmount annuity, MonetaryAmount paymentOrCashFlows, Rate rate, int periods) { MonetaryAmount pvAnnuity = PresentValueAnnuity.of().calculate(annuity, rate, periods); return new BigDecimal( String.valueOf( Math.log( BigDecimal.ONE .subtract( pvAnnuity .divide(paymentOrCashFlows.getNumber()) .getNumber() .numberValue(BigDecimal.class)) .pow(-1) .doubleValue()) / Math.log(1 + rate.get().doubleValue()))); }
/** Exports stats related to the JVM and runtime environment. */ public static void export() { final OperatingSystemMXBean osMbean = ManagementFactory.getOperatingSystemMXBean(); if (osMbean instanceof com.sun.management.OperatingSystemMXBean) { final com.sun.management.OperatingSystemMXBean sunOsMbean = (com.sun.management.OperatingSystemMXBean) osMbean; Stats.exportAll( ImmutableList.<Stat<? extends Number>>builder() .add( new StatImpl<Long>("system_free_physical_memory_mb") { @Override public Long read() { return sunOsMbean.getFreePhysicalMemorySize() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("system_free_swap_mb") { @Override public Long read() { return sunOsMbean.getFreeSwapSpaceSize() / BYTES_PER_MB; } }) .add( Rate.of( new StatImpl<Long>("process_cpu_time_nanos") { @Override public Long read() { return sunOsMbean.getProcessCpuTime(); } }) .withName("process_cpu_cores_utilized") .withScaleFactor(SECS_PER_NANO) .build()) .build()); } if (osMbean instanceof com.sun.management.UnixOperatingSystemMXBean) { final com.sun.management.UnixOperatingSystemMXBean unixOsMbean = (com.sun.management.UnixOperatingSystemMXBean) osMbean; Stats.exportAll( ImmutableList.<Stat<? extends Number>>builder() .add( new StatImpl<Long>("process_max_fd_count") { @Override public Long read() { return unixOsMbean.getMaxFileDescriptorCount(); } }) .add( new StatImpl<Long>("process_open_fd_count") { @Override public Long read() { return unixOsMbean.getOpenFileDescriptorCount(); } }) .build()); } final Runtime runtime = Runtime.getRuntime(); final ClassLoadingMXBean classLoadingBean = ManagementFactory.getClassLoadingMXBean(); MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean(); final MemoryUsage heapUsage = memoryBean.getHeapMemoryUsage(); final MemoryUsage nonHeapUsage = memoryBean.getNonHeapMemoryUsage(); final ThreadMXBean threads = ManagementFactory.getThreadMXBean(); final RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean(); Stats.exportAll( ImmutableList.<Stat<? extends Number>>builder() .add( new StatImpl<Long>("jvm_time_ms") { @Override public Long read() { return System.currentTimeMillis(); } }) .add( new StatImpl<Integer>("jvm_available_processors") { @Override public Integer read() { return runtime.availableProcessors(); } }) .add( new StatImpl<Long>("jvm_memory_free_mb") { @Override public Long read() { return runtime.freeMemory() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_memory_max_mb") { @Override public Long read() { return runtime.maxMemory() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_memory_mb_total") { @Override public Long read() { return runtime.totalMemory() / BYTES_PER_MB; } }) .add( new StatImpl<Integer>("jvm_class_loaded_count") { @Override public Integer read() { return classLoadingBean.getLoadedClassCount(); } }) .add( new StatImpl<Long>("jvm_class_total_loaded_count") { @Override public Long read() { return classLoadingBean.getTotalLoadedClassCount(); } }) .add( new StatImpl<Long>("jvm_class_unloaded_count") { @Override public Long read() { return classLoadingBean.getUnloadedClassCount(); } }) .add( new StatImpl<Long>("jvm_gc_collection_time_ms") { @Override public Long read() { long collectionTimeMs = 0; for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) { collectionTimeMs += bean.getCollectionTime(); } return collectionTimeMs; } }) .add( new StatImpl<Long>("jvm_gc_collection_count") { @Override public Long read() { long collections = 0; for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) { collections += bean.getCollectionCount(); } return collections; } }) .add( new StatImpl<Long>("jvm_memory_heap_mb_used") { @Override public Long read() { return heapUsage.getUsed() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_memory_heap_mb_committed") { @Override public Long read() { return heapUsage.getCommitted() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_memory_heap_mb_max") { @Override public Long read() { return heapUsage.getMax() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_memory_non_heap_mb_used") { @Override public Long read() { return nonHeapUsage.getUsed() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_memory_non_heap_mb_committed") { @Override public Long read() { return nonHeapUsage.getCommitted() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_memory_non_heap_mb_max") { @Override public Long read() { return nonHeapUsage.getMax() / BYTES_PER_MB; } }) .add( new StatImpl<Long>("jvm_uptime_secs") { @Override public Long read() { return runtimeMXBean.getUptime() / 1000; } }) .add( new StatImpl<Double>("system_load_avg") { @Override public Double read() { return osMbean.getSystemLoadAverage(); } }) .add( new StatImpl<Integer>("jvm_threads_peak") { @Override public Integer read() { return threads.getPeakThreadCount(); } }) .add( new StatImpl<Long>("jvm_threads_started") { @Override public Long read() { return threads.getTotalStartedThreadCount(); } }) .add( new StatImpl<Integer>("jvm_threads_daemon") { @Override public Integer read() { return threads.getDaemonThreadCount(); } }) .add( new StatImpl<Integer>("jvm_threads_active") { @Override public Integer read() { return threads.getThreadCount(); } }) .build()); // Export per memory pool gc time and cycle count like Ostrich // This is based on code in Bridcage: https://cgit.twitter.biz/birdcage/tree/ \ // ostrich/src/main/scala/com/twitter/ostrich/stats/StatsCollection.scala Stats.exportAll( Iterables.transform( ManagementFactory.getGarbageCollectorMXBeans(), new Function<GarbageCollectorMXBean, Stat<? extends Number>>() { @Override public Stat<? extends Number> apply(final GarbageCollectorMXBean gcMXBean) { return new StatImpl<Long>( "jvm_gc_" + Stats.normalizeName(gcMXBean.getName()) + "_collection_count") { @Override public Long read() { return gcMXBean.getCollectionCount(); } }; } })); Stats.exportAll( Iterables.transform( ManagementFactory.getGarbageCollectorMXBeans(), new Function<GarbageCollectorMXBean, Stat<? extends Number>>() { @Override public Stat<? extends Number> apply(final GarbageCollectorMXBean gcMXBean) { return new StatImpl<Long>( "jvm_gc_" + Stats.normalizeName(gcMXBean.getName()) + "_collection_time_ms") { @Override public Long read() { return gcMXBean.getCollectionTime(); } }; } })); Stats.exportString( new StatImpl<String>("jvm_input_arguments") { @Override public String read() { return runtimeMXBean.getInputArguments().toString(); } }); for (final String property : System.getProperties().stringPropertyNames()) { Stats.exportString( new StatImpl<String>("jvm_prop_" + Stats.normalizeName(property)) { @Override public String read() { return System.getProperty(property); } }); } }