程序包的使用
com.alibaba.metrics

com.alibaba.metrics使用的com.alibaba.metrics中的类

类和说明
BucketCounter 提供分桶计数功能，每个桶统计一定时间间隔内的计数。
Clock An abstraction for how time passes.
ClusterHistogram A metric to calculate cluster histogram, since the the percentile can not be aggregated.
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.
Counter An incrementing and decrementing counter metric.
Counting An interface for metric types which have counts.
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 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.
MetricLevel enum的数值不能为负数，且不能太大
MetricName A metric name with the ability to include semantic tags.
MetricRegistry A registry of metric instances.
MetricRegistryListener Listeners for events from the registry.
MetricSet A set of named metrics.
RatioGauge.Ratio A ratio of one quantity to another.
ReservoirType An enum of various reservoir type
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.