RateStatistic (Jetty :: Utilities 9.4.14.v20181114 API)

java.lang.Object
- org.eclipse.jetty.util.statistic.RateStatistic

```
public class RateStatistic
extends Object
```
Statistics on a time sequence rate.

Calculates the rate at which the record() method is called over the configured period, retaining also the total count and maximum rate achieved.

The implementation keeps a Deque of timestamps for all records for the last time period, so this method is not suitable for large rates unless a small time period is used.

Constructor Summary

Constructors
Constructor Description

RateStatistic(long period, TimeUnit units)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`age(long period, TimeUnit units)`
`String`	`dump()`
`String`	`dump(TimeUnit units)`
`long`	`getCount()`
`long`	`getMax()`
`long`	`getOldest(TimeUnit units)`
`long`	`getPeriod()`
`int`	`getRate()`
`TimeUnit`	`getUnits()`
`int`	`record()`	Records a sample value.
`void`	`reset()`	Resets the statistics.
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RateStatistic

public RateStatistic(long period,
                     TimeUnit units)

Method Detail
- getPeriod
```
public long getPeriod()
```
- getUnits
```
public TimeUnit getUnits()
```
- reset
```
public void reset()
```
  Resets the statistics.
- age
```
protected void age(long period,
                   TimeUnit units)
```
- record
```
public int record()
```
  Records a sample value.
  
  Returns:
  
  the number of records in the current period.
- getRate
```
public int getRate()
```
  Returns:
  
  the number of records in the current period
- getMax
```
public long getMax()
```
  Returns:
  
  the max number of samples per period.
- getOldest
```
public long getOldest(TimeUnit units)
```
  Parameters:
  
  units - the units of the return
  
  Returns:
  
  the age of the oldest sample in the requested units
- getCount
```
public long getCount()
```
  Returns:
  
  the number of samples recorded
- dump
```
public String dump()
```
- dump
```
public String dump(TimeUnit units)
```
- toString
```
public String toString()
```
  Overrides:
  
  toString in class Object