程序包 com.alibaba.metrics

接口概要

接口	说明
BucketCounter	提供分桶计数功能，每个桶统计一定时间间隔内的计数。
Collector	The GOF Visitor pattern.
Compass	A Compass Metric that wraps: a Timer to measure the qps and rt distribution a Counter to measure the success count a RatioGauge to measure the success rate a Map of Counter> to record the count for each error code a Map of Counter> to record the count for each addon
Compass.Context	A timing context.
Constants
Counter	An incrementing and decrementing counter metric.
Counting	An interface for metric types which have counts.
DynamicMetricSet	A dynamic metric set.
FastCompass	用于在高吞吐率环境下，快速统计方法的qps，rt，成功率和错误码。
Gauge<T>	A gauge metric is an instantaneous reading of a particular value.
Histogram	A metric which calculates the distribution of a value.
IMetricManager
Meter	A meter metric which measures mean throughput and one-, five-, and fifteen-minute exponentially-weighted moving average throughput.
Metered	An object which maintains mean and exponentially-weighted rate.
Metric	A tag interface to indicate that a class is a metric.
MetricFilter	A filter used to determine whether or not a metric should be reported, among other things.
MetricRegistryListener	Listeners for events from the registry.
MetricSet	A set of named metrics.
Reservoir	A statistically representative reservoir of a data stream.
Sampling	An object which samples values.
Snapshot
Timer	A timer metric which aggregates timing durations and provides duration statistics, plus throughput statistics via Meter.
Timer.Context	A timing context.

类概要

类	说明
CachedGauge<T>	A Gauge implementation which caches its value for a period of time.
CachedMetricSet
Clock	An abstraction for how time passes.
Clock.CpuTimeClock	A clock implementation which returns the current thread's CPU time.
Clock.UserTimeClock	A clock implementation which returns the current time in epoch nanoseconds.
ClusterHistogram	A metric to calculate cluster histogram, since the the percentile can not be aggregated.
DerivativeGauge<F,T>	A gauge whose value is derived from the value of another gauge.
JmxAttributeGauge	A Gauge implementation which queries an MBeanServerConnection for an attribute of an object.
MetricManager	The design concept is heavily borrowed from SLF4j (http://www.slf4j.org/), the logging framework.
MetricName	A metric name with the ability to include semantic tags.
MetricRegistry	A registry of metric instances.
MetricRegistryListener.Base	A no-op implementation of MetricRegistryListener.
NOPMetricManager	IMetricManager的空实现
PersistentGauge<T>	A subclass of Gauge which should be persistent.
RatioGauge	A gauge which measures the ratio of one value to another.
RatioGauge.Ratio	A ratio of one quantity to another.
StringUtils

枚举概要

枚举	说明
MetricLevel	enum的数值不能为负数，且不能太大
ReservoirType	An enum of various reservoir type