添加消息链

344d2d5e · Future · 4ec6121e · 344d2d5e · 344d2d5e · 344d2d5e
Commit 344d2d5e authored Oct 19, 2022 by Future
14 changed files
--- a/config/src/main/resources/config/application-dev.yml
+++ b/config/src/main/resources/config/application-dev.yml
@@ -29,7 +29,7 @@ spring:
  redis:
    database: 0
    host: 127.0.0.1
-    password:
+#    password:
    port: 6379
 #    database: 0

--- a/core/pom.xml
+++ b/core/pom.xml
@@ -164,6 +164,13 @@
            <version>4.0.0</version>
        </dependency>
+        <!--    注解版分布式锁    -->
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>lock4j-redisson-spring-boot-starter</artifactId>
+            <version>2.2.2</version>
+        </dependency>
    </dependencies>
    <!--    <build>-->
    <!--        <resources>-->

--- a/core/src/main/java/com/wecloud/im/action/NormalChatAction.java
+++ b/core/src/main/java/com/wecloud/im/action/NormalChatAction.java
@@ -185,7 +185,7 @@ public class NormalChatAction {
        }
        // 响应发送方消息id等信息
-        response(reqId, imMessageOnlineSend.getMsgId(), request.getSenderChannel());
+        response(reqId, imMessageOnlineSend, request.getSenderChannel());
    }
    private void sendMsgToMember(ImApplication imApplication, ImConversationMembers member, ImMessageOnlineSend imMessageOnlineSend, PushVO push, Boolean isPush) {
@@ -235,6 +235,7 @@ public class NormalChatAction {
        // 封装响应的实体
        ImMessageOnlineSend imMessageOnlineSend = new ImMessageOnlineSend();
        imMessageOnlineSend.setMsgId(imMessage.getId());
+        imMessageOnlineSend.setPreMessageId(imMessage.getPreMessageId());
        imMessageOnlineSend.setSender(imClientSender.getClientId());
        Map<String, Object> content = JsonUtils.beanCopyDeep(data, Map.class);
        //action的属性无需要返回
@@ -255,16 +256,16 @@ public class NormalChatAction {
     * 响应发送方消息id等信息
     *
     * @param reqId
-     * @param messageId
+     * @param imMessageOnlineSend
     * @param channel
     */
-    private void response(String reqId, long messageId, Channel channel) {
+    private void response(String reqId, ImMessageOnlineSend imMessageOnlineSend, Channel channel) {
        WsResponse<MsgVo> responseModel = new WsResponse<>();
        ApiResult<Boolean> result = ApiResult.result(ApiCode.SUCCESS);
        responseModel.setCmd(WsResponseCmdEnum.RES.getCmdCode());
        responseModel.setCode(result.getCode());
        responseModel.setMsg(result.getMessage());
-        responseModel.setData(new MsgVo(messageId));
+        responseModel.setData(new MsgVo(imMessageOnlineSend.getMsgId(), imMessageOnlineSend.getPreMessageId(), imMessageOnlineSend.getCreateTime()));
        responseModel.setReqId(reqId);
        // 响应发送方
        channelSender.sendMsgLocal((NioSocketChannel) channel, responseModel);

--- a/core/src/main/java/com/wecloud/im/chatroom/action/ChatRoomAction.java
+++ b/core/src/main/java/com/wecloud/im/chatroom/action/ChatRoomAction.java
@@ -154,7 +154,7 @@ public class ChatRoomAction {
        responseModel.setCmd(WsResponseCmdEnum.RES.getCmdCode());
        responseModel.setCode(result.getCode());
        responseModel.setMsg(result.getMessage());
-        responseModel.setData(new MsgVo(messageId));
+        responseModel.setData(new MsgVo(messageId, null, new Date()));
        responseModel.setReqId(reqId);
        // 响应发送方
        channelSender.sendMsgLocal((NioSocketChannel) channel, responseModel);

--- a/core/src/main/java/com/wecloud/im/entity/ImMessageOnlineSend.java
+++ b/core/src/main/java/com/wecloud/im/entity/ImMessageOnlineSend.java
@@ -35,6 +35,9 @@ public class ImMessageOnlineSend extends BaseEntity {
    @ApiModelProperty("消息id")
    private Long msgId;
+    @ApiModelProperty("前一条消息的id")
+    private Long preMessageId;
    @ApiModelProperty("创建时间")
    private Date createTime;

--- a/core/src/main/java/com/wecloud/im/param/MsgVo.java
+++ b/core/src/main/java/com/wecloud/im/param/MsgVo.java
@@ -6,6 +6,7 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 import java.io.Serializable;
+import java.util.Date;
 /**
 * @Description TODO
@@ -16,5 +17,16 @@ import java.io.Serializable;
 @AllArgsConstructor
 @NoArgsConstructor
 public class MsgVo implements Serializable {
    private Long msgId;
+    /**
+     * 上一条消息id
+     */
+    private Long preMessageId;
+    /**
+     * 消息创建时间
+     */
+    private Date createTime;
 }
--- a/core/src/main/java/com/wecloud/im/post/Couriers.java
+++ b/core/src/main/java/com/wecloud/im/post/Couriers.java
@@ -42,7 +42,8 @@ public class Couriers {
        ImMessageOnlineSend imMessageOnlineSend = new ImMessageOnlineSend();
        imMessageOnlineSend.setMsgId(message.getId());
-        imMessageOnlineSend.setCreateTime(new Date());
+        imMessageOnlineSend.setPreMessageId(message.getPreMessageId());
+        imMessageOnlineSend.setCreateTime(message.getCreateTime());
        imMessageOnlineSend.setType(message.getMsgType());
        imMessageOnlineSend.setSender(sender.getClientId());
        imMessageOnlineSend.setContent(content);

--- a/core/src/main/java/com/wecloud/im/post/MessageBuilder.java
+++ b/core/src/main/java/com/wecloud/im/post/MessageBuilder.java
@@ -54,16 +54,13 @@ public class MessageBuilder {
     * @param type
     * @param application
     * @param sender
-     * @param receiver
     * @Return
     */
    public static ImMessage buildEventMessage(MsgTypeEnum type, ImApplication application,
                                              ImClient sender, ImConversation conversation,
                                              String content) {
-        long messageId = SnowflakeUtil.getId();
        ImMessage imMessage = new ImMessage();
        //  保存消息至消息表
-        imMessage.setId(messageId);
        imMessage.setMsgType(type.getUriCode());
        imMessage.setFkAppid(application.getId());
        imMessage.setSender(sender.getId());
@@ -73,7 +70,6 @@ public class MessageBuilder {
        imMessage.setSystemFlag(false);
        imMessage.setSendStatus(2);
        imMessage.setFkConversationId(conversation.getId());
-        imMessage.setCreateTime(new Date());
        return imMessage;
    }

--- a/core/src/main/java/com/wecloud/im/service/ImMessageService.java
+++ b/core/src/main/java/com/wecloud/im/service/ImMessageService.java
@@ -47,10 +47,6 @@ public interface ImMessageService extends BaseService<ImMessage> {
     */
    ApiResult<Boolean> restApiImMessageSend(ImMsgSendToOnlineClient imMsgSendToOnlineClient, ImApplication imApplication);
-    ImMessage saveImMessage(ImApplication imApplication, ImClient imClientSender, long messageId, ReceiveVO receiveVO, ReceiveDataVO sysParam);
    @Transactional(rollbackFor = Exception.class)
    ImMessage saveImMessage(ImClientSimpleDto client, ChatContentVo data);
@@ -188,4 +184,11 @@ public interface ImMessageService extends BaseService<ImMessage> {
     * @Return
     */
    Boolean singleUserNotification(SingleUserNotificationParam param);
+    /**
+     * 保存消息到数据库
+     * @param imMessage
+     */
+    void saveMessageToDb(ImMessage imMessage);
 }
--- a/core/src/main/java/com/wecloud/im/service/impl/ImMessageServiceImpl.java
+++ b/core/src/main/java/com/wecloud/im/service/impl/ImMessageServiceImpl.java
 package com.wecloud.im.service.impl;
-import com.wecloud.im.entity.ImClientBlacklist;
-import com.wecloud.im.param.ImConversationQueryVo;
-import com.wecloud.im.post.MessageBuilder;
-import io.geekidea.springbootplus.framework.common.api.ApiCode;
-import io.geekidea.springbootplus.framework.common.api.ApiResult;
-import io.geekidea.springbootplus.framework.common.exception.BusinessException;
-import io.geekidea.springbootplus.framework.common.service.impl.BaseServiceImpl;
-import io.geekidea.springbootplus.framework.core.pagination.PageInfo;
-import io.geekidea.springbootplus.framework.core.pagination.Paging;
-import io.geekidea.springbootplus.framework.shiro.util.SecurityUtils;
-import lombok.extern.slf4j.Slf4j;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.lang3.StringUtils;
-import org.springframework.beans.BeanUtils;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.context.ApplicationEventPublisher;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
+import com.baomidou.lock.annotation.Lock4j;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.core.metadata.OrderItem;
@@ -69,6 +37,7 @@ import com.wecloud.im.param.add.ImMsgRecall;
 import com.wecloud.im.param.add.ImMsgSendToOnlineClient;
 import com.wecloud.im.param.add.ImMsgUpdate;
 import com.wecloud.im.param.add.ServerImConversationCreate;
+import com.wecloud.im.post.MessageBuilder;
 import com.wecloud.im.sdk.enums.ChatTypeEnum;
 import com.wecloud.im.service.ContextService;
 import com.wecloud.im.service.ImApplicationService;
@@ -89,10 +58,39 @@ import com.wecloud.im.ws.model.request.PushVO;
 import com.wecloud.im.ws.model.request.ReceiveDataVO;
 import com.wecloud.im.ws.model.request.ReceiveVO;
 import com.wecloud.im.ws.sender.ChannelSender;
+import com.wecloud.im.ws.utils.RedisUtils;
 import com.wecloud.pushserver.client.model.constant.MqConstant;
 import com.wecloud.pushserver.client.model.dto.PushDTO;
 import com.wecloud.utils.JsonUtils;
 import com.wecloud.utils.SnowflakeUtil;
+import io.geekidea.springbootplus.framework.common.api.ApiCode;
+import io.geekidea.springbootplus.framework.common.api.ApiResult;
+import io.geekidea.springbootplus.framework.common.exception.BusinessException;
+import io.geekidea.springbootplus.framework.common.service.impl.BaseServiceImpl;
+import io.geekidea.springbootplus.framework.core.pagination.PageInfo;
+import io.geekidea.springbootplus.framework.core.pagination.Paging;
+import io.geekidea.springbootplus.framework.shiro.util.SecurityUtils;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationEventPublisher;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 /**
@@ -105,6 +103,8 @@ import com.wecloud.utils.SnowflakeUtil;
 @Service
 public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMessage> implements ImMessageService {
+    private static final String LAST_MSG_PREFIX = "last_msg_";
    @Autowired
    private ImMessageMapper imMessageMapper;
@@ -138,6 +138,9 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
    @Autowired
    private ApplicationEventPublisher eventPublisher;
+    @Autowired
+    private RedisUtils redisUtils;
    @Override
    @Transactional(rollbackFor = Exception.class)
    public ApiResult<Boolean> restApiImMessageSend(ImMsgSendToOnlineClient imMsgSendToOnlineClient, ImApplication imApplication) {
@@ -192,34 +195,6 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
    }
    @Override
-    @Transactional(rollbackFor = Exception.class)
-    public ImMessage saveImMessage(ImApplication imApplication, ImClient imClientSender, long messageId, ReceiveVO receiveVO, ReceiveDataVO sysParam) {
-        ImMessage imMessage = new ImMessage();
-        //  数据库字段类型为JSON格式
-        //  因mysql关系型数据库非MongoDB文档类型数据库,第三方应用拓展的自定义参数名和值需使用json格式落库
-        String contentJsonString = JsonUtils.encodeJson(receiveVO.getData());
-        imMessage.setContent(contentJsonString);
-        imMessage.setId(messageId);
-        imMessage.setCreateTime(new Date());
-        imMessage.setFkAppid(imApplication.getId());
-        imMessage.setSender(imClientSender.getId());
-        imMessage.setWithdraw(false);
-        imMessage.setEvent(false);
-        imMessage.setSystemFlag(false);
-        imMessage.setSendStatus(2);
-        imMessage.setMsgType(sysParam.getType());
-        imMessage.setFkConversationId(sysParam.getToConversation());
-        this.save(imMessage);
-//        eventPublisher.publishEvent(new ClientSendMessageEvent(imApplication.getId(), imMessage));
-        return imMessage;
-    }
-    @Override
    public ImMessage saveImMessage(ImClientSimpleDto client, ChatContentVo data) {
        ImMessage imMessage = new ImMessage();
@@ -228,9 +203,6 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
        //  因mysql关系型数据库非MongoDB文档类型数据库,第三方应用拓展的自定义参数名和值需使用json格式落库
        String contentJsonString = JsonUtils.encodeJson(data);
        imMessage.setContent(contentJsonString);
-        imMessage.setId(SnowflakeUtil.getId());
-        imMessage.setCreateTime(new Date());
        imMessage.setFkAppid(client.getFkAppid());
        imMessage.setSender(client.getId());
        imMessage.setWithdraw(false);
@@ -240,7 +212,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
        imMessage.setMsgType(data.getType());
        imMessage.setAt(data.getAt());
        imMessage.setFkConversationId(data.getToConversation());
-        this.save(imMessage);
+        this.saveMessageToDb(imMessage);
 //        eventPublisher.publishEvent(new ClientSendMessageEvent(client.getFkAppid(), imMessage));
@@ -283,7 +255,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
        content.put("msgOwner", msgOwner.getClientId());
        ImMessage imMessage = MessageBuilder.buildEventMessage(MsgTypeEnum.MSG_WITHDRAW, imApplication,
                imClientSender, new ImConversation().setId(messageById.getFkConversationId()), JsonUtils.encodeJson(content));
-        this.save(imMessage);
+        this.saveMessageToDb(imMessage);
        if (saveOk) {
            // 查询该会话所有成员
@@ -373,7 +345,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
            content.put("msgOwner", msgOwner.getClientId());
            ImMessage imMessage = MessageBuilder.buildEventMessage(MsgTypeEnum.MSG_DELETE, imApplication,
                    imClientSender, new ImConversation().setId(message.getFkConversationId()), JsonUtils.encodeJson(content));
-            this.save(imMessage);
+            this.saveMessageToDb(imMessage);
            if (saveOk) {
                // 查询该会话所有成员
@@ -631,7 +603,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
            ImMessage message = assembleImMessage(appId, sender, conversation.getId(), param.getMessageType(), false,
                    JSONObject.toJSONString(param.getContent()));
            // 持久化
-            this.save(message);
+            this.saveMessageToDb(message);
            // 拼装发送消息体
            ImMessageOnlineSend imMessageOnlineSend = assembleImMessageOnlineSend(message, sender, appId);
            // 入库 保存收件箱
@@ -729,7 +701,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
                }
            }
            // 持久化
-            this.save(message);
+            this.saveMessageToDb(message);
            // 拼装发送消息体
            ImMessageOnlineSend imMessageOnlineSend = assembleImMessageOnlineSend(message, sender, appId);
@@ -770,7 +742,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
            // 组装消息
            ImMessage message = assembleImMessage(appId, sender, conversation.getId(), param.getMessageType(), false, JSONObject.toJSONString(param.getContent()));
            // 持久化
-            this.save(message);
+            this.saveMessageToDb(message);
            // 拼装发送消息体
            ImMessageOnlineSend imMessageOnlineSend = assembleImMessageOnlineSend(message, sender, appId);
@@ -820,7 +792,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
            ImMessage message = assembleImMessage(appId, sender, conversation.getId(), param.getMessageType(), true,
                    JSONObject.toJSONString(param.getContent()));
            // 持久化
-            this.save(message);
+            this.saveMessageToDb(message);
            // 拼装发送消息体
            ImMessageOnlineSend imMessageOnlineSend = assembleImMessageOnlineSend(message, sender, appId);
@@ -871,7 +843,7 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
            ImMessage message = assembleImMessage(application.getId(), sender, conversation.getId(), param.getMessageType(),
                    false, param.getContent());
            // 持久化
-            this.save(message);
+            this.saveMessageToDb(message);
            // 拼装发送消息体
            ImMessageOnlineSend imMessageOnlineSend = assembleImMessageOnlineSend(message, sender, application.getId());
@@ -898,6 +870,53 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
        return true;
    }
+    /**
+     * 持久化消息到数据库并更新相关缓存
+     * expire 锁过期时间 防止死锁
+     *
+     * @param imMessage
+     */
+    @Lock4j(keys = {"#imMessage.fkConversationId"}, expire = 3000, acquireTimeout = 1000)
+    @Override
+    public void saveMessageToDb(ImMessage imMessage) {
+        imMessage.setId(SnowflakeUtil.getId());
+        imMessage.setCreateTime(new Date());
+        this.setLastMessageIdAndFreshCash(imMessage);
+        this.save(imMessage);
+    }
+    /**
+     * 查找会话的最新一条消息
+     *
+     * @param message
+     * @return
+     */
+    private void setLastMessageIdAndFreshCash(ImMessage message) {
+        try {
+            // 执行业务方法
+            String key = LAST_MSG_PREFIX + message.getFkConversationId();
+            String messageId = redisUtils.getKey(key);
+            if (StringUtils.isNotBlank(messageId)) {
+                // 将Redis中最新的messageId存入
+                message.setPreMessageId(Long.valueOf(messageId));
+            } else {
+                // 落库查
+                ImMessage preMessage = imMessageMapper.selectOne(new QueryWrapper<ImMessage>().lambda()
+                        .eq(ImMessage::getFkConversationId, message.getFkConversationId())
+                        .orderByDesc(ImMessage::getId)
+                        .last("limit 1")
+                );
+                if (preMessage != null) {
+                    message.setPreMessageId(preMessage.getId());
+                }
+            }
+            redisUtils.addKey(key, message.getId().toString(), Duration.ofMinutes(30));
+        } catch (Exception e) {
+            log.info("获取会话最后一条消息异常 ", e);
+        }
+    }
    /**
     *
     * @Author luozh
@@ -1067,13 +1086,8 @@ public class ImMessageServiceImpl extends BaseServiceImpl<ImMessageMapper, ImMes
     */
    private ImMessage assembleImMessage(Long appId, ImClient sender, Long toConversationId, String messageType,
                                        Boolean event, String content) {
-        long messageId = SnowflakeUtil.getId();
        ImMessage imMessage = new ImMessage();
        imMessage.setContent(content);
-        imMessage.setId(messageId);
-        imMessage.setCreateTime(new Date());
        imMessage.setFkAppid(appId);
        imMessage.setSender(sender.getId());
        imMessage.setWithdraw(false);

--- a/core/src/main/java/com/wecloud/im/thousandchat/action/ThousandChatAction.java
+++ b/core/src/main/java/com/wecloud/im/thousandchat/action/ThousandChatAction.java
@@ -139,7 +139,7 @@ public class ThousandChatAction {
        }
        // 响应发送方消息id等信息
-        response(reqId, imMessageOnlineSend.getMsgId(), request.getSenderChannel());
+        response(reqId, imMessageOnlineSend, request.getSenderChannel());
    }
@@ -200,6 +200,7 @@ public class ThousandChatAction {
        // 封装响应的实体
        ImMessageOnlineSend imMessageOnlineSend = new ImMessageOnlineSend();
        imMessageOnlineSend.setMsgId(imMessage.getId());
+        imMessageOnlineSend.setPreMessageId(imMessage.getPreMessageId());
        imMessageOnlineSend.setSender(imClientSender.getClientId());
        Map<String, Object> content = JsonUtils.beanCopyDeep(data, Map.class);
        //action的属性无需要返回
@@ -220,16 +221,16 @@ public class ThousandChatAction {
     * 响应发送方消息id等信息
     *
     * @param reqId
-     * @param messageId
+     * @param imMessageOnlineSend
     * @param channel
     */
-    private void response(String reqId, long messageId, Channel channel) {
+    private void response(String reqId, ImMessageOnlineSend imMessageOnlineSend, Channel channel) {
        WsResponse<MsgVo> responseModel = new WsResponse<>();
        ApiResult<Boolean> result = ApiResult.result(ApiCode.SUCCESS);
        responseModel.setCmd(WsResponseCmdEnum.RES.getCmdCode());
        responseModel.setCode(result.getCode());
        responseModel.setMsg(result.getMessage());
-        responseModel.setData(new MsgVo(messageId));
+        responseModel.setData(new MsgVo(imMessageOnlineSend.getMsgId(), imMessageOnlineSend.getPreMessageId(), imMessageOnlineSend.getCreateTime()));
        responseModel.setReqId(reqId);
        // 响应发送方
        channelSender.sendMsgLocal((NioSocketChannel)channel, responseModel);

--- a/core/src/main/java/com/wecloud/im/vo/OfflineMsgDto.java
+++ b/core/src/main/java/com/wecloud/im/vo/OfflineMsgDto.java
@@ -29,6 +29,9 @@ public class OfflineMsgDto implements Serializable {
    @ApiModelProperty("消息id")
    private Long msgId;
+    @ApiModelProperty("前一条消息的id")
+    private Long preMessageId;
    @ApiModelProperty("创建时间")
    private Date createTime;

--- a/core/src/main/resources/mapper/ImMsgReadLastestMapper.xml
+++ b/core/src/main/resources/mapper/ImMsgReadLastestMapper.xml
@@ -35,6 +35,7 @@
    <select id="findOfflineMsgs" resultType="com.wecloud.im.thousandchat.param.ThousandOffineMsgDto">
        <foreach collection="lastestMsgs" item="lastestMsg" separator=" union all ">
        select msg.id              AS msgId,
+            msg.pre_message_id AS preMessageId,
               msg.create_time,
               msg.withdraw_time,
               msg.update_date,

--- a/docs/db/feature-cluster增量.sql
+++ b/docs/db/feature-cluster增量.sql
 -- 在feature-cluster 2021年12月22日之后，需要执行的的sql增量脚本
@@ -210,3 +210,6 @@ ALTER TABLE `im_message` ADD INDEX `idx_sender`(`sender`);
 ALTER TABLE `im_message` ADD INDEX `idx_create_time`(`create_time`);
+ALTER TABLE im_message
+    ADD COLUMN `pre_message_id` bigint(20) DEFAULT NULL COMMENT '前一条消息的id';