org.springframework.messaging.support (Spring Framework 5.2.12.RELEASE API)

Provides implementations of Message along with a MessageBuilder and MessageHeaderAccessor for building and working with messages and message headers, as well as various MessageChannel implementations and channel interceptor support.

接口概要
接口	说明
ChannelInterceptor	Interface for interceptors that are able to view and/or modify the `Messages` being sent-to and/or received-from a `MessageChannel`.
ExecutorChannelInterceptor	An extension of `ChannelInterceptor` with callbacks to intercept the asynchronous sending of a `Message` to a specific subscriber through an `Executor`.
HeaderMapper<T>	Generic strategy interface for mapping `MessageHeaders` to and from other types of objects.
InterceptableChannel	A `MessageChannel` that maintains a list `ChannelInterceptors` and allows interception of message sending.
MessageHandlingRunnable	Extension of the `Runnable` interface with methods to obtain the `MessageHandler` and `Message` to be handled.
MessageHeaderInitializer	Callback interface for initializing a `MessageHeaderAccessor`.

类概要
类	说明
AbstractHeaderMapper<T>	A base `HeaderMapper` implementation.
AbstractMessageChannel	Abstract base class for `MessageChannel` implementations.
AbstractSubscribableChannel	Abstract base class for `SubscribableChannel` implementations.
ChannelInterceptorAdapter	已过时。 as of 5.0.7 `ChannelInterceptor` has default methods (made possible by a Java 8 baseline) and can be implemented directly without the need for this no-op adapter
ErrorMessage	A `GenericMessage` with a `Throwable` payload.
ExecutorSubscribableChannel	A `SubscribableChannel` that sends messages to each of its subscribers.
GenericMessage<T>	An implementation of `Message` with a generic payload.
IdTimestampMessageHeaderInitializer	A `MessageHeaderInitializer` to customize the strategy for ID and TIMESTAMP message header generation.
ImmutableMessageChannelInterceptor	A simpler interceptor that calls `MessageHeaderAccessor.setImmutable()` on the headers of messages passed through the preSend method.
MessageBuilder<T>	A builder for creating a `GenericMessage` (or `ErrorMessage` if the payload is of type `Throwable`).
MessageHeaderAccessor	Wrapper around `MessageHeaders` that provides extra features such as strongly typed accessors for specific headers, the ability to leave headers in a `Message` mutable, and the option to suppress automatic generation of `id` and `timesteamp` headers.
NativeMessageHeaderAccessor	`MessageHeaderAccessor` sub-class that supports storage and access of headers from an external source such as a message broker.

程序包 org.springframework.messaging.support