57 lines
1.9 KiB
Java
57 lines
1.9 KiB
Java
package ru.serega6531.packmate.service;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.web.socket.TextMessage;
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import org.springframework.web.socket.WebSocketSession;
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import org.springframework.web.socket.sockjs.SockJsTransportFailureException;
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import ru.serega6531.packmate.model.pojo.SubscriptionMessage;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Objects;
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@Service
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@Slf4j
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public class StreamSubscriptionService {
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private final List<WebSocketSession> subscribers = Collections.synchronizedList(new ArrayList<>());
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private final ObjectMapper mapper;
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@Autowired
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public StreamSubscriptionService(ObjectMapper mapper) {
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this.mapper = mapper;
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}
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public void addSubscriber(WebSocketSession session) {
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subscribers.add(session);
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log.info("Подписан пользователь {}", Objects.requireNonNull(session.getRemoteAddress()).getHostName());
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}
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public void removeSubscriber(WebSocketSession session) {
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subscribers.remove(session);
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log.info("Отписан пользователь {}", Objects.requireNonNull(session.getRemoteAddress()).getHostName());
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}
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void broadcast(SubscriptionMessage message) {
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subscribers.forEach(s -> {
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try {
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s.sendMessage(objectToTextMessage(message));
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} catch (IOException | SockJsTransportFailureException e) {
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log.warn("WS", e);
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}
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});
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}
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private TextMessage objectToTextMessage(SubscriptionMessage object) throws JsonProcessingException {
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return new TextMessage(mapper.writeValueAsString(object));
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}
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}
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