OrderBasedMessageBuffer (ActiveMQ :: Broker 5.17.2 API)

java.lang.Object
- org.apache.activemq.memory.buffer.OrderBasedMessageBuffer

All Implemented Interfaces:

MessageBuffer
```
public class OrderBasedMessageBuffer
extends Object
implements MessageBuffer
```
A MessageBuffer which evicts messages in arrival order so the oldest messages are removed first.

Constructor Summary

Constructors
Constructor Description

OrderBasedMessageBuffer()

OrderBasedMessageBuffer(int limit)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`
`MessageQueue`	`createMessageQueue()`	Creates a new message queue instance
`int`	`getSize()`
`void`	`onSizeChanged(MessageQueue queue, int delta, int queueSize)`	After a message queue has changed we may need to perform some evictions

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

- Constructor Detail
  - OrderBasedMessageBuffer
```
public OrderBasedMessageBuffer()
```
  - OrderBasedMessageBuffer
```
public OrderBasedMessageBuffer(int limit)
```
- Method Detail
  - getSize
```
public int getSize()
```
    Specified by:
    
    getSize in interface MessageBuffer
  - createMessageQueue
```
public MessageQueue createMessageQueue()
```
    Creates a new message queue instance
    
    Specified by:
    
    createMessageQueue in interface MessageBuffer
  - onSizeChanged
```
public void onSizeChanged(MessageQueue queue,
                          int delta,
                          int queueSize)
```
    After a message queue has changed we may need to perform some evictions
    
    Specified by:
    
    onSizeChanged in interface MessageBuffer
    
    Parameters:
    
    delta -
    
    queueSize -
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface MessageBuffer