golang-metrics

* It will return an instance of MetricName.

com.alibaba.metrics.Constants.NOT_AVAILABLE.

* * An exponentially-weighted moving average.

due to the MetricName can not be used as map's Key, so we need to maintains this struct.

* * An abstraction for how time passes.

* * An incrementing and decrementing counter metric.

* * An interface for metric types which have counts.

* * This interface will be used to record the qps, rt and error code.

* * It's the go version of com.alibaba.metrics.Metered */.

* It's the same as Metric interface in Java dubbo.

* * A registry of metric instances.

* * It's the abstraction of metrics * see com.alibaba.metrics.MetricSet */.

A statistically representative reservoir of a data stream.

* * It's the go version of com.alibaba.metrics.Snapshot */.

* * enum points that which interval's value will be allow * In theory, we can handle any interval' value.

* it's the same as dubbo in Java */.