Package org.springframework.messaging.simp.annotation.support
@NullMarked
package org.springframework.messaging.simp.annotation.support
Support classes for handling messages from simple messaging protocols
 (like STOMP).
- 
ClassDescriptionMessagingExceptionthrown when a session is missing.Resolver for arguments of typePrincipal, includingOptional<Principal>.AHandlerMethodReturnValueHandlerfor sending to destinations specified in aSendToorSendToUsermethod-level annotations.A handler for messages delegating to@MessageMappingand@SubscribeMappingannotated methods.HandlerMethodReturnValueHandlerfor replying directly to a subscription.