StompWebSocketServiceImpl.java
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package com.huaheng.pc.stompwebsocket.service;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.huaheng.pc.stompwebsocket.WebsocketConstants;
import com.huaheng.pc.stompwebsocket.domain.StompMessage;
import com.huaheng.pc.stompwebsocket.domain.StompPayload;
import com.huaheng.pc.stompwebsocket.mapper.StompMessageMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.core.MessagePostProcessor;
import org.springframework.messaging.simp.SimpMessageSendingOperations;
import org.springframework.stereotype.Service;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
@Service("stompWebSocketService")
public class StompWebSocketServiceImpl extends ServiceImpl<StompMessageMapper, StompMessage> implements StompWebSocketService{
@Autowired
private SimpMessageSendingOperations messaging;
/**
* 发送消息
* @param topic
* @param payload
* @param <T>
*/
public <T> void send(String topic, StompPayload<T> payload) {
List<String> sendTo = payload.getSendTo();
if (sendTo == null) {
//没有指定sendTo则广播发送
sendMessageBroadcast(topic, payload.getData());
} else {
//遍历发送消息给指定用户
for (String loginName : payload.getSendTo()) {
sendMessageToUser(topic, payload, loginName);
}
}
}
/**
* 广播发送消息
*
* @param topic
* @param data
*/
public <T> void sendMessageBroadcast(String topic, T data) {
messaging.convertAndSend(topic, data);
}
/**
* 给指定用户发消息
*
* @param topic
* @param payload
* @param user loginName
*/
public <T> void sendMessageToUser(String topic, StompPayload<T> payload, String user) {
HashMap<String, Object> headers = new HashMap<>();
if(payload.isQos1()){
StompMessage msg = new StompMessage();
msg.setUser(user);
msg.setTopic(topic);
msg.setMsg(JSON.toJSONString(payload.getData()));
msg.setCreated(new Date());
msg.setLastUpdated(new Date());
save(msg);
headers.put(WebsocketConstants.HEADER_MEG_ID, msg.getId().toString());
}
messaging.convertAndSendToUser(user, topic, payload.getData(), headers);
}
public void confirmMsg(String msg_id){
removeById(msg_id);
}
/**
* 将离线后的消息发送给用户
* @param user
*/
public void sendOfflineMessageToUser(String user){
LambdaQueryWrapper<StompMessage> queryWrapper = Wrappers.lambdaQuery();
queryWrapper.eq(StompMessage::getUser, user);
List<StompMessage> msgList = list(queryWrapper);
for(StompMessage msg : msgList){
messaging.convertAndSendToUser(user, msg.getTopic(), msg.getMsg());
removeById(msg.getId());
}
}
}