CircularBuffer (WSO2 Carbon - Utilities 4.9.2 API)

java.lang.Object
- org.wso2.carbon.utils.logging.CircularBuffer<E>

```
public class CircularBuffer<E>
extends Object
```
This is a Circular Buffer implementation. In this implementaion it is assumed that items will never be removed from this buffer. This can be used for a case such as a Rolling Log. A client can request the latest 'n' number of items that are stored in this buffer.

Constructor Summary

Constructors
Constructor Description

CircularBuffer()
Create a circular buffer with the maximum allowed size

CircularBuffer(int size)
Create a circular buffer with the given size

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`append(E element)`	Append elements while preserving the circular nature of the buffer.
`void`	`clear()`	Clear the circular buffer and reset the indices.
`List<E>`	`get(int amount)`	Retrieve the given amount of elements from the circular buffer.
`Object[]`	`getObjects(int amount)`	This method is added for backward compatibility.
`int`	`getSize()`	Return the capacity of the circular buffer.

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

- Constructor Detail
  - CircularBuffer
```
public CircularBuffer(int size)
```
    Create a circular buffer with the given size
    
    Parameters:
    
    size - - fixed size of the buffer
  - CircularBuffer
```
public CircularBuffer()
```
    Create a circular buffer with the maximum allowed size
- Method Detail
  - append
```
public void append(E element)
```
    Append elements while preserving the circular nature of the buffer.
    
    Parameters:
    
    element - - element to be appended
  - get
```
public List<E> get(int amount)
```
    Retrieve the given amount of elements from the circular buffer. This is a forgiving operation, if the amount asked is greater than the size of the buffer it will return all the available elements
    
    Parameters:
    
    amount - - no of elements to return
    
    Returns:
    
    - a list of elements
  - getObjects
```
public Object[] getObjects(int amount)
```
    This method is added for backward compatibility.
    
    Parameters:
    
    amount - - amount of elements to return from the buffer
    
    Returns:
    
    - an object array of amount number of elements in the buffer
  - clear
```
public void clear()
```
    Clear the circular buffer and reset the indices.
  - getSize
```
public int getSize()
```
    Return the capacity of the circular buffer. This is set during buffer initialization.
    
    Returns:
    
    - capacity of the buffer