org.springframework.web.reactive.socket.adapter.TomcatWebSocketSession 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
*
* 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.reactive.socket.adapter;
import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
import javax.websocket.Session;
import org.apache.tomcat.websocket.WsSession;
import reactor.core.publisher.MonoProcessor;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.web.reactive.socket.HandshakeInfo;
import org.springframework.web.reactive.socket.WebSocketSession;
/**
* Spring {@link WebSocketSession} adapter for Tomcat's
* {@link javax.websocket.Session}.
*
* @author Violeta Georgieva
* @since 5.0
*/
public class TomcatWebSocketSession extends StandardWebSocketSession {
private static final AtomicIntegerFieldUpdater SUSPENDED =
AtomicIntegerFieldUpdater.newUpdater(TomcatWebSocketSession.class, "suspended");
@SuppressWarnings("unused")
private volatile int suspended;
public TomcatWebSocketSession(Session session, HandshakeInfo info, DataBufferFactory factory) {
super(session, info, factory);
}
public TomcatWebSocketSession(Session session, HandshakeInfo info, DataBufferFactory factory,
MonoProcessor completionMono) {
super(session, info, factory, completionMono);
suspendReceiving();
}
@Override
protected boolean canSuspendReceiving() {
return true;
}
@Override
protected void suspendReceiving() {
if (SUSPENDED.compareAndSet(this, 0, 1)) {
((WsSession) getDelegate()).suspend();
}
}
@Override
protected void resumeReceiving() {
if (SUSPENDED.compareAndSet(this, 1, 0)) {
((WsSession) getDelegate()).resume();
}
}
}