Spring Websockets缓冲区大小限制

Question

在Spring Websockets中，在传输注册和servlet容器上设置缓冲区大小有什么区别？

WebSocketTransportRegistration.setSendBufferSizeLimit和ServletServerContainerFactoryBean.setMaxTextMessageBufferSize

ServletServerContainerFactoryBean container = new ServletServerContainerFactoryBean();
container.setMaxTextMessageBufferSize(websocketBuffer);

public void configureWebSocketTransport(WebSocketTransportRegistration reg) {
        reg.setMessageSizeLimit(sessionBuffer);
        reg.setSendBufferSizeLimit(sessionBuffer);
}