See: Description
| Interface | Description | 
|---|---|
| HandshakeHandler | 
 Contract for processing a WebSocket handshake request. 
 | 
| HandshakeInterceptor | 
 Interceptor for WebSocket handshake requests. 
 | 
| RequestUpgradeStrategy | 
 A server-specific strategy for performing the actual upgrade to a WebSocket exchange. 
 | 
| Exception | Description | 
|---|---|
| HandshakeFailureException | 
 Thrown when handshake processing failed to complete due to an internal, unrecoverable
 error. 
 |