程序包 com.alibaba.metrics

接口概要

接口	说明
ClusterHistogramBuilder<T>
MetricBuilder<T extends Metric>
ReservoirTypeBuilder<T>

类概要

类	说明
AbstractSnapshot	A statistical snapshot of a AbstractSnapshot.
AliMetricManager
BucketCounterImpl	Record the accurate number of events within each given time interval, one for each bucket.
BucketReservoir
BucketSnapshot
ClusterHistogramImpl
CompassImpl
CounterImpl	An incrementing and decrementing counter metric.
EWMA	An exponentially-weighted moving average.
ExponentiallyDecayingReservoir	An exponentially-decaying random reservoir of longs.
FastCompassImpl	通过1个LongAdder来同时完成count和rt的累加操作 Java里面1个Long有64个bit, 除去最高位表示符号的1个bit，还有63个bit可以使用 在一个不超过60s统计周期内，方法调用的总次数和总次数其实完全用不到63个bit 所以可以将这两个统计项放到一个long里面来表示 这里高位的25个bit表示统计周期内调用总次数，后38位表示总rt Since the total number of method invocation and total time of method execution within a collecting interval never exceed the range a LONG can represent, we can use one LongAdder to record both the total count and total number
HistogramImpl	A metric which calculates the distribution of a value.
LongAdder	One or more variables that together maintain an initially zero long sum.
ManualClock
MeterImpl	A meter metric which measures mean throughput and one-, five-, and fifteen-minute exponentially-weighted moving average throughputs.
MetricManagerBinder
MetricRegistryImpl	A registry of metric instances.
SharedMetricRegistries	A map of shared, named metric registries.
SlidingTimeWindowReservoir	A Reservoir implementation backed by a sliding window that stores only the measurements made in the last N seconds (or other time unit).
SlidingWindowReservoir	A Reservoir implementation backed by a sliding window that stores the last N measurements.
TimerImpl	A timer metric which aggregates timing durations and provides duration statistics, plus throughput statistics via Meter.
TimerImpl.ContextImpl	A timing context.
UniformReservoir	A random sampling reservoir of a stream of longs.
UniformSnapshot	A statistical snapshot of a UniformSnapshot.
WeightedSnapshot	A statistical snapshot of a WeightedSnapshot.
WeightedSnapshot.WeightedSample	A single sample item with value and its weights for WeightedSnapshot.