spring-session WebSocketDisconnectHandler 源码
spring-session WebSocketDisconnectHandler 代码
文件路径：/spring-session-samples/spring-session-sample-boot-websocket/src/main/java/sample/websocket/WebSocketDisconnectHandler.java
/*
* Copyright 2014-2019 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 sample.websocket;
import java.util.Collections;
import sample.data.ActiveWebSocketUserRepository;
import org.springframework.context.ApplicationListener;
import org.springframework.messaging.simp.SimpMessageSendingOperations;
import org.springframework.web.socket.messaging.SessionDisconnectEvent;
public class WebSocketDisconnectHandler<S> implements ApplicationListener<SessionDisconnectEvent> {
private ActiveWebSocketUserRepository repository;
private SimpMessageSendingOperations messagingTemplate;
public WebSocketDisconnectHandler(SimpMessageSendingOperations messagingTemplate,
ActiveWebSocketUserRepository repository) {
super();
this.messagingTemplate = messagingTemplate;
this.repository = repository;
}
@Override
public void onApplicationEvent(SessionDisconnectEvent event) {
String id = event.getSessionId();
if (id == null) {
return;
}
this.repository.findById(id).ifPresent((user) -> {
this.repository.deleteById(id);
this.messagingTemplate.convertAndSend("/topic/friends/signout",
Collections.singletonList(user.getUsername()));
});
}
}
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