Protocol

java.lang.Object
- akka.persistence.Protocol

```
public class Protocol
extends java.lang.Object
```
INTERNAL API.
Internal persistence extension messages extend this trait.
Helps persistence plugin developers to differentiate internal persistence extension messages from their custom plugin messages.
Journal messages need not be serialization verified as the Journal Actor should always be a local Actor (and serialization is performed by plugins). One notable exception to this is the shared journal used for testing.

- Nested Class Summary
  
  Nested Classes
  Modifier and Type Class Description
  
  static interface Protocol.Message
- Constructor Summary
  
  Constructors
  Constructor Description
  
  Protocol()
- Method Summary
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Protocol
```
public Protocol()
```