StepDouble (Spectator)

java.lang.Object
- com.netflix.spectator.impl.StepDouble

All Implemented Interfaces:

StepValue
```
public class StepDouble
extends Object
implements StepValue
```
Utility class for managing a set of AtomicLong instances mapped to a particular step interval. The current implementation keeps an array of with two items where one is the current value being updated and the other is the value from the previous interval and is only available for polling.
This class is an internal implementation detail only intended for use within spectator. It is subject to change without notice.

Constructor Summary

Constructors
Constructor and Description

StepDouble(double init, Clock clock, long step)
Create a new instance.

Constructors
Constructor and Description
`StepDouble(double init, Clock clock, long step)` Create a new instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`double`	`addAndGet(long now, double amount)` Increment the current value and return the result.
`boolean`	`compareAndSet(long now, double expect, double update)` Set the current value and return the previous value.
`double`	`getAndAdd(long now, double amount)` Increment the current value and return the value before incrementing.
`double`	`getAndSet(long now, double value)` Set the current value and return the previous value.
`double`	`getCurrent()` Get the value for the current bucket.
`double`	`getCurrent(long now)` Get the value for the current bucket.
`void`	`max(long now, double value)` Set the current value to the maximum of the current value or the provided value.
`void`	`min(long now, double value)` Set the current value to the minimum of the current value or the provided value.
`double`	`poll()` Get the value for the last completed interval.
`double`	`poll(long now)` Get the value for the last completed interval.
`double`	`pollAsRate()` Get the value for the last completed interval as a rate per second.
`double`	`pollAsRate(long now)` Get the value for the last completed interval as a rate per second.
`void`	`setCurrent(long now, double value)` Set the value for the current bucket.
`long`	`timestamp()` Get the timestamp for the end of the last completed interval.
`String`	`toString()`

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

- Constructor Detail
  - StepDouble
```
public StepDouble(double init,
                  Clock clock,
                  long step)
```
    Create a new instance.
- Method Detail
  - getCurrent
```
public double getCurrent()
```
    Get the value for the current bucket.
  - getCurrent
```
public double getCurrent(long now)
```
    Get the value for the current bucket.
  - setCurrent
```
public void setCurrent(long now,
                       double value)
```
    Set the value for the current bucket.
  - addAndGet
```
public double addAndGet(long now,
                        double amount)
```
    Increment the current value and return the result.
  - getAndAdd
```
public double getAndAdd(long now,
                        double amount)
```
    Increment the current value and return the value before incrementing.
  - getAndSet
```
public double getAndSet(long now,
                        double value)
```
    Set the current value and return the previous value.
  - compareAndSet
```
public boolean compareAndSet(long now,
                             double expect,
                             double update)
```
    Set the current value and return the previous value.
  - min
```
public void min(long now,
                double value)
```
    Set the current value to the minimum of the current value or the provided value.
  - max
```
public void max(long now,
                double value)
```
    Set the current value to the maximum of the current value or the provided value.
  - poll
```
public double poll()
```
    Get the value for the last completed interval.
  - poll
```
public double poll(long now)
```
    Get the value for the last completed interval.
  - pollAsRate
```
public double pollAsRate()
```
    Get the value for the last completed interval as a rate per second.
    
    Specified by:
    
    pollAsRate in interface StepValue
  - pollAsRate
```
public double pollAsRate(long now)
```
    Get the value for the last completed interval as a rate per second.
    
    Specified by:
    
    pollAsRate in interface StepValue
  - timestamp
```
public long timestamp()
```
    Get the timestamp for the end of the last completed interval.
    
    Specified by:
    
    timestamp in interface StepValue
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class StepDouble

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

StepDouble

Method Detail

getCurrent

getCurrent

setCurrent

addAndGet

getAndAdd

getAndSet

compareAndSet

min

max

poll

poll

pollAsRate

pollAsRate

timestamp

toString