spring WebSocketMessage 源码
spring WebSocketMessage 代码
文件路径：/spring-websocket/src/main/java/org/springframework/web/socket/WebSocketMessage.java
/*
* Copyright 2002-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.socket;
/**
* A message that can be handled or sent on a WebSocket connection.
*
* @author Rossen Stoyanchev
* @since 4.0
* @param <T> the payload type
*/
public interface WebSocketMessage<T> {
/**
* Return the message payload (never {@code null}).
*/
T getPayload();
/**
* Return the number of bytes contained in the message.
*/
int getPayloadLength();
/**
* When partial message support is available and requested via
* {@link org.springframework.web.socket.WebSocketHandler#supportsPartialMessages()},
* this method returns {@code true} if the current message is the last part of the
* complete WebSocket message sent by the client. Otherwise {@code false} is returned
* if partial message support is either not available or not enabled.
*/
boolean isLast();
}
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