CircularBuffer (Apache ZooKeeper - Server 3.9.1 API)

java.lang.Object
- org.apache.zookeeper.server.util.CircularBuffer<T>

```
public class CircularBuffer<T>
extends Object
```
Thread safe FIFO CircularBuffer implementation. When the buffer is full write operation overwrites the oldest element. Fun thing @todo, make this lock free as this is called on every quorum message

Constructor Summary

Constructors
Constructor Description

CircularBuffer(Class<T> clazz, int capacity)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`isEmpty()`
`boolean`	`isFull()`
`T`	`peek()`
`void`	`reset()`
`int`	`size()`
`T`	`take()`	Reads from the buffer in a FIFO manner.
`void`	`write(T element)`	Puts elements in the next available index in the array.

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

- Constructor Detail
  - CircularBuffer
```
public CircularBuffer(Class<T> clazz,
                      int capacity)
```
- Method Detail
  - write
```
public void write(T element)
```
    Puts elements in the next available index in the array. If the array is full the oldest element is replaced with the new value.
    
    Parameters:
    
    element -
  - take
```
public T take()
```
    Reads from the buffer in a FIFO manner. Returns the oldest element in the buffer if the buffer is not empty Returns null if the buffer is empty
    
    Returns:
    
    the oldest element in the buffer
  - peek
```
public T peek()
```
  - size
```
public int size()
```
  - isEmpty
```
public boolean isEmpty()
```
  - isFull
```
public boolean isFull()
```
  - reset
```
public void reset()
```