| Interface | Description | 
|---|---|
| BufferPool.BufferPoolAPI | |
| ListenCallback | Internal interface, similar to the MessageListener but used
 at the IO base
 The listen callback interface is used by the replication system
 when data has been received. | 
| Class | Description | 
|---|---|
| BufferPool | |
| ChannelData | The  ChannelDataobject is used to transfer a message through the
 channel interceptor stack and eventually out on a transport to be sent
 to another node. | 
| DirectByteArrayOutputStream | Byte array output stream that exposes the byte array directly | 
| ObjectReader | The object reader object is an object used in conjunction with
 java.nio TCP messages. | 
| ReplicationStream | Custom subclass of  ObjectInputStreamthat loads from the
 class loader for this web application. | 
| XByteBuffer | The XByteBuffer provides a dual functionality. | 
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