com.alibaba.metrics

接口 Timer

所有超级接口:

Counting, Metered, Metric, Sampling

public interface Timer
extends Metered, Sampling

A timer metric which aggregates timing durations and provides duration statistics, plus throughput statistics via Meter. Timer相当于Meter+Histogram的组合，同时统计一段代码，一个方法的qps，以及执行时间的分布情况

嵌套类概要

嵌套类

限定符和类型	接口和说明
static interface	Timer.Context A timing context.

方法概要

限定符和类型	方法和说明
Timer.Context	time() Returns a new Timer.Context.
<T> T	time(Callable<T> event) Times and records the duration of event.
void	update(long duration, TimeUnit unit) Adds a recorded duration.

从接口继承的方法 com.alibaba.metrics.Metered

getCount, getFifteenMinuteRate, getFiveMinuteRate, getInstantCount, getInstantCount, getInstantCountInterval, getMeanRate, getOneMinuteRate

从接口继承的方法 com.alibaba.metrics.Metric

lastUpdateTime

从接口继承的方法 com.alibaba.metrics.Sampling

getSnapshot

方法详细资料

update

void update(long duration,
            TimeUnit unit)

Adds a recorded duration.

参数:

duration - the length of the duration

unit - the scale unit of duration

time

<T> T time(Callable<T> event)
    throws Exception

Times and records the duration of event.

类型参数:

T - the type of the value returned by event

参数:

event - a Callable whose Callable.call() method implements a process whose duration should be timed

返回:

the value returned by event

抛出:

Exception - if event throws an Exception

time

Timer.Context time()

Returns a new Timer.Context.

返回:

a new Timer.Context

另请参阅:

Timer.Context