package com.ycl.websocket;
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import io.netty.channel.Channel;
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import io.netty.channel.group.ChannelGroup;
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import io.netty.channel.group.DefaultChannelGroup;
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import io.netty.util.concurrent.GlobalEventExecutor;
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import java.util.Map;
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import java.util.Objects;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* @author：xp
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* @date：2024/4/19 14:02
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*/
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public class NettyConnect {
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/**
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* netty提供的管理连接集合
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*/
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private static ChannelGroup channelGroup = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
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/**
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* 存放用户与Chanel的对应信息，用于给指定用户发送消息
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*/
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private static ConcurrentHashMap<Long, Channel> userChannelMap = new ConcurrentHashMap<>(128);
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private NettyConnect() {}
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/**
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* 获取channel组
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* @return
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*/
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public static ChannelGroup getChannelGroup() {
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return channelGroup;
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}
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/**
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* 移除channel时，同时移除用户对应关系
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*
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* @param channel
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*/
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public static void removeChannel(Channel channel) {
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Long userId = null;
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for (Map.Entry<Long, Channel> channelEntry : userChannelMap.entrySet()) {
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if (Objects.equals(channel, channelEntry.getValue())) {
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userId = channelEntry.getKey();
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break;
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}
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}
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if (Objects.nonNull(userId)) {
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userChannelMap.remove(userId);
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}
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channelGroup.remove(channel);
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}
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/**
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* 获取用户channel map
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* @return
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*/
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public static ConcurrentHashMap<Long, Channel> getUserChannelMap(){
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return userChannelMap;
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}
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/**
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* 移除用户关系时，同时移除连接
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*
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* @param userId
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*/
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public static void removeUserChannel(Integer userId) {
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Channel channel = userChannelMap.get(userId);
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if (Objects.nonNull(userId)) {
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userChannelMap.remove(userId);
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channelGroup.remove(channel);
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}
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}
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}
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