Refcountable

All Known Implementing Classes:

RefcountedBytesMessage, RefcountedNioMessage
```
public interface Refcountable<T>
```
Provides ref-counting for messages (https://issues.redhat.com/browse/JGRP-2417). The idea is that the payload of the message is a shared resource (e.g. memory from a pool), accessed by different threads. Each thread increments the refcount. When a thread is done, it decrements the refcount, and when the count is 0, the shared resource can be freed (ie. returned to the pool).

Since:

5.1.0

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  T decr()
  Decrements the refcount.
  
  T incr()
  Increments the refcount

- Method Detail
  - incr
```
T incr()
```
    Increments the refcount
    
    Returns:
    
    T the type (typically a message)
  - decr
```
T decr()
```
    Decrements the refcount. This should not become negative. When the refount is 0 for the first time, the shared resource can be returned (in order to be reused).
    
    Returns:
    
    T the type (typically a message)