B06 备忘录模式 spring-web-flow源码分析

org.springframework.binding.message.StateManageableMessageContext

public interface StateManageableMessageContext extends MessageContext {

    /**
     * Create a serializable memento, or token representing a snapshot of the internal state of this message context.
     * @return the messages memento
     */
    public Serializable createMessagesMemento();

    /**
     * Set the state of this context from the memento provided. After this call, the messages in this context will match
     * what is encapsulated inside the memento. Any previous state will be overridden.
     * @param messagesMemento the messages memento
     */
    public void restoreMessages(Serializable messagesMemento);

    /**
     * Configure the message source used to resolve messages added to this context. May be set at any time to change how
     * coded messages are resolved.
     * @param messageSource the message source
     * @see MessageContext#addMessage(MessageResolver)
     */
    public void setMessageSource(MessageSource messageSource);
}