53 lines
1.7 KiB
Java
53 lines
1.7 KiB
Java
/*
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* Copyright 2014-2019 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.websocket;
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import java.util.Arrays;
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import sample.data.ActiveWebSocketUserRepository;
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import org.springframework.context.ApplicationListener;
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import org.springframework.messaging.simp.SimpMessageSendingOperations;
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import org.springframework.web.socket.messaging.SessionDisconnectEvent;
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public class WebSocketDisconnectHandler<S> implements ApplicationListener<SessionDisconnectEvent> {
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private ActiveWebSocketUserRepository repository;
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private SimpMessageSendingOperations messagingTemplate;
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public WebSocketDisconnectHandler(SimpMessageSendingOperations messagingTemplate,
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ActiveWebSocketUserRepository repository) {
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super();
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this.messagingTemplate = messagingTemplate;
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this.repository = repository;
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}
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@Override
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public void onApplicationEvent(SessionDisconnectEvent event) {
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String id = event.getSessionId();
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if (id == null) {
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return;
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}
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this.repository.findById(id).ifPresent((user) -> {
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this.repository.deleteById(id);
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this.messagingTemplate.convertAndSend("/topic/friends/signout", Arrays.asList(user.getUsername()));
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});
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}
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}
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