MessageBuffer

java.lang.Object
- akka.util.MessageBuffer

```
public final class MessageBuffer
extends java.lang.Object
```
A non thread safe mutable message buffer that can be used to buffer messages inside actors.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`MessageBuffer`	`append(java.lang.Object message, ActorRef ref)` Add one element to the end of the message buffer.
`void`	`dropHead()` Remove the first element of the message buffer.
`static MessageBuffer`	`empty()` Create an empty message buffer.
`void`	`foreach(scala.Function2<java.lang.Object,ActorRef,scala.runtime.BoxedUnit> f)` Iterate over all elements of the buffer and apply a function to each element.
`void`	`forEach(Procedure2<java.lang.Object,ActorRef> f)` Java API
`Pair<java.lang.Object,ActorRef>`	`getHead()` Java API
`scala.Tuple2<java.lang.Object,ActorRef>`	`head()` Return the first element of the message buffer.
`boolean`	`isEmpty()` Check if the message buffer is empty.
`boolean`	`nonEmpty()` Check if the message buffer is not empty.
`int`	`size()` How many elements are in the message buffer.

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

- Method Detail
  - empty
```
public static MessageBuffer empty()
```
    Create an empty message buffer.
    
    Returns:
    
    an empty message buffer
  - isEmpty
```
public boolean isEmpty()
```
    Check if the message buffer is empty.
    
    Returns:
    
    if the buffer is empty
  - nonEmpty
```
public boolean nonEmpty()
```
    Check if the message buffer is not empty.
    
    Returns:
    
    if the buffer is not empty
  - size
```
public int size()
```
    How many elements are in the message buffer.
    
    Returns:
    
    the number of elements in the message buffer
  - append
```
public MessageBuffer append(java.lang.Object message,
                            ActorRef ref)
```
    Add one element to the end of the message buffer.
    
    Parameters:
    
    message - the message to buffer
    
    ref - the actor to buffer
    
    Returns:
    
    this message buffer
  - dropHead
```
public void dropHead()
```
    Remove the first element of the message buffer.
  - head
```
public scala.Tuple2<java.lang.Object,ActorRef> head()
```
    Return the first element of the message buffer.
    
    Returns:
    
    the first element or an element containing null if the buffer is empty
  - getHead
```
public Pair<java.lang.Object,ActorRef> getHead()
```
    Java API
    Return the first element of the message buffer.
    
    Returns:
    
    the first element or an element containing null if the buffer is empty
  - foreach
```
public void foreach(scala.Function2<java.lang.Object,ActorRef,scala.runtime.BoxedUnit> f)
```
    Iterate over all elements of the buffer and apply a function to each element.
    
    Parameters:
    
    f - the function to apply to each element
  - forEach
```
public void forEach(Procedure2<java.lang.Object,ActorRef> f)
```
    Java API
    Iterate over all elements of the buffer and apply a function to each element.
    
    Parameters:
    
    f - the function to apply to each element

Class MessageBuffer

Method Summary

Methods inherited from class java.lang.Object

Method Detail

empty

isEmpty

nonEmpty

size

append

dropHead

head

getHead

foreach

forEach