org.springframework.web.reactive.socket.adapter.ReactorNettyWebSocketSession Maven / Gradle / Ivy
/*
* 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
*
* http://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.reactive.socket.adapter;
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.netty.NettyInbound;
import reactor.netty.NettyOutbound;
import reactor.netty.NettyPipeline;
import reactor.netty.http.websocket.WebsocketInbound;
import reactor.netty.http.websocket.WebsocketOutbound;
import org.springframework.core.io.buffer.NettyDataBufferFactory;
import org.springframework.web.reactive.socket.CloseStatus;
import org.springframework.web.reactive.socket.HandshakeInfo;
import org.springframework.web.reactive.socket.WebSocketMessage;
import org.springframework.web.reactive.socket.WebSocketSession;
/**
* {@link WebSocketSession} implementation for use with the Reactor Netty's
* {@link NettyInbound} and {@link NettyOutbound}.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
public class ReactorNettyWebSocketSession
extends NettyWebSocketSessionSupport {
private final int maxFramePayloadLength;
/**
* Constructor for the session, using the {@link #DEFAULT_FRAME_MAX_SIZE} value.
*/
public ReactorNettyWebSocketSession(WebsocketInbound inbound, WebsocketOutbound outbound,
HandshakeInfo info, NettyDataBufferFactory bufferFactory) {
this(inbound, outbound, info, bufferFactory, DEFAULT_FRAME_MAX_SIZE);
}
/**
* Constructor with an additional maxFramePayloadLength argument.
* @since 5.1
*/
public ReactorNettyWebSocketSession(WebsocketInbound inbound, WebsocketOutbound outbound,
HandshakeInfo info, NettyDataBufferFactory bufferFactory,
int maxFramePayloadLength) {
super(new WebSocketConnection(inbound, outbound), info, bufferFactory);
this.maxFramePayloadLength = maxFramePayloadLength;
}
@Override
public Flux receive() {
return getDelegate().getInbound()
.aggregateFrames(this.maxFramePayloadLength)
.receiveFrames()
.map(super::toMessage)
.doOnNext(message -> {
if (logger.isTraceEnabled()) {
logger.trace(getLogPrefix() + "Received " + message);
}
});
}
@Override
public Mono send(Publisher messages) {
Flux frames = Flux.from(messages)
.doOnNext(message -> {
if (logger.isTraceEnabled()) {
logger.trace(getLogPrefix() + "Sending " + message);
}
})
.map(this::toFrame);
return getDelegate().getOutbound()
.options(NettyPipeline.SendOptions::flushOnEach)
.sendObject(frames)
.then();
}
@Override
public Mono close(CloseStatus status) {
return getDelegate().getOutbound().sendClose(status.getCode(), status.getReason());
}
/**
* Simple container for {@link NettyInbound} and {@link NettyOutbound}.
*/
public static class WebSocketConnection {
private final WebsocketInbound inbound;
private final WebsocketOutbound outbound;
public WebSocketConnection(WebsocketInbound inbound, WebsocketOutbound outbound) {
this.inbound = inbound;
this.outbound = outbound;
}
public WebsocketInbound getInbound() {
return this.inbound;
}
public WebsocketOutbound getOutbound() {
return this.outbound;
}
}
}