spring BlockingWebSocketSession 源码
spring BlockingWebSocketSession 代码
文件路径：/spring-websocket/src/test/java/org/springframework/web/socket/handler/BlockingWebSocketSession.java
/*
* Copyright 2002-2020 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.handler;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicReference;
import org.springframework.web.socket.WebSocketMessage;
/**
* Blocks indefinitely on sending a message but provides a latch to notify when
* the message has been "sent" (i.e. session is blocked).
*
* @author Rossen Stoyanchev
*/
public class BlockingWebSocketSession extends TestWebSocketSession {
private final AtomicReference<CountDownLatch> sendLatch = new AtomicReference<>();
private final AtomicReference<CountDownLatch> releaseLatch = new AtomicReference<>();
public CountDownLatch initSendLatch() {
this.sendLatch.set(new CountDownLatch(1));
return this.sendLatch.get();
}
@Override
public void sendMessage(WebSocketMessage<?> message) throws IOException {
super.sendMessage(message);
if (this.sendLatch.get() != null) {
this.sendLatch.get().countDown();
}
block();
}
private void block() {
try {
this.releaseLatch.set(new CountDownLatch(1));
this.releaseLatch.get().await();
}
catch (InterruptedException ex) {
ex.printStackTrace();
}
}
}
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