yixiongandClaude
d22fdcfaad
- 应用骨架: Solon + MyBatis-Plus + PostgreSQL + Redis + Sa-Token - 核心链路: 回调网关 → 消息落库(幂等) → 分发队列(FOR UPDATE SKIP LOCKED) → worker消费/重试/死信 - 多租户隔离: 前缀法账号映射, 所有业务表带 tenant_id - 管理后台: FreeMarker 渲染, 租户/授权/队列/用量管理页面 - 历史消息补拉: 水位线驱动, getRoamMsg/getGroupMsg 增量拉取, 兜底回调丢失 - msg_key 统一算法(回调/补拉共享, 跨路径去重) Co-Authored-By: Claude <noreply@anthropic.com>
232 lines
8.5 KiB
Java
232 lines
8.5 KiB
Java
package com.imutil.service.impl;
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import com.baomidou.mybatisplus.core.toolkit.Wrappers;
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import com.imutil.common.MsgKeys;
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import com.imutil.entity.DistQueue;
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import com.imutil.entity.GroupMapping;
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import com.imutil.entity.ImMessage;
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import com.imutil.entity.Tenant;
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import com.imutil.mapper.DistQueueMapper;
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import com.imutil.mapper.GroupMappingMapper;
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import com.imutil.mapper.ImMessageMapper;
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import com.imutil.mapper.PullWatermarkMapper;
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import com.imutil.service.CallbackService;
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import com.imutil.service.TenantService;
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import lombok.extern.slf4j.Slf4j;
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import org.noear.snack4.ONode;
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import org.noear.solon.annotation.Component;
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import org.noear.solon.annotation.Inject;
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import org.noear.solon.data.annotation.Tran;
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import java.time.Instant;
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import java.time.OffsetDateTime;
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import java.time.ZoneId;
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/**
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* 腾讯回调处理服务实现
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* <p>
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* 流程：识别租户 → 消息类回调落 im_message（幂等）→ 所有回调写 dist_queue 分发业务系统。
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* {@code @Tran} 保证消息落库与分发入队同事务：要么同时成功，要么都不入库（避免半写）。
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*
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* @author imutil
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*/
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@Slf4j
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@Component
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public class CallbackServiceImpl implements CallbackService {
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/** 消息类回调命令关键字（命中则额外落 im_message） */
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private static final String[] MSG_COMMAND_KEYWORDS = {"SendMsg", "RecvMsg"};
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@Inject
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private ImMessageMapper imMessageMapper;
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@Inject
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private DistQueueMapper distQueueMapper;
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@Inject
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private GroupMappingMapper groupMappingMapper;
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@Inject
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private PullWatermarkMapper pullWatermarkMapper;
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@Inject
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private TenantService tenantService;
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@Override
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@Tran
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public String handleCallback(String callbackCommand, String body) {
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if (callbackCommand == null || callbackCommand.isEmpty()) {
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return ok();
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}
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ONode node;
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try {
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node = ONode.ofJson(body == null ? "{}" : body);
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} catch (Exception e) {
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log.warn("回调 body 解析失败 command={} : {}", callbackCommand, e.getMessage());
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return ok();
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}
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// 1. 识别租户
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String tenantId = identifyTenant(callbackCommand, node);
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if (tenantId == null) {
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// 无法识别租户（如腾讯系统消息 administrator），不落库不分发
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log.debug("回调无法识别租户，跳过 command={} from={}", callbackCommand, node.get("FromAccount").getString());
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return ok();
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}
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// 2. 消息类回调落库 im_message（幂等：msg_key 存在则跳过）
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// msg_key = command:from:convTarget:msgSeq:msgRandom，含 MsgSeq+MsgRandom 全局唯一，单独作幂等键；
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// 不依赖 MsgTimeStamp（避免腾讯回调时间戳偏差导致漏判）。
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// DB 主键 (msg_key, msg_time) 因分区表约束保留 msg_time，作兜底防护。
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String msgKey = null;
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if (isMessageCallback(callbackCommand)) {
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ImMessage msg = parseMessage(callbackCommand, node, tenantId);
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if (msg != null) {
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msgKey = msg.getMsgKey();
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long exists = imMessageMapper.selectCount(Wrappers.<ImMessage>lambdaQuery()
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.eq(ImMessage::getMsgKey, msg.getMsgKey()));
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if (exists == 0) {
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imMessageMapper.insert(msg);
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// 推进补拉水位线：记录该会话最新消息位置，补拉任务据此增量拉取（兜底回调丢失）
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pullWatermarkMapper.upsert(tenantId, msg.getConvId(), msg.getConvType(),
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node.get("MsgSeq").getLong(), msg.getMsgTime(), OffsetDateTime.now());
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}
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}
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}
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// 3. 写分发队列（payload=原始回调体，供业务系统消费）
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Tenant tenant = tenantService.getById(tenantId);
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if (tenant != null && tenant.getCallbackUrl() != null && !tenant.getCallbackUrl().isEmpty()) {
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DistQueue q = new DistQueue();
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q.setMsgKey(msgKey);
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q.setTenantId(tenantId);
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q.setConvId(extractConvId(callbackCommand, node));
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q.setTargetUrl(tenant.getCallbackUrl());
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q.setPayload(body);
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q.setStatus(0);
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q.setRetryCount(0);
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q.setNextRetryAt(OffsetDateTime.now());
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distQueueMapper.insert(q);
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}
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return ok();
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}
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/**
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* 识别租户：优先 FromAccount 前缀，群回调用 GroupId 查 group_mapping
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*
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* @return 租户ID，识别失败返回 null
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*/
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private String identifyTenant(String command, ONode node) {
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String from = node.get("FromAccount").getString();
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if (from != null && !from.isEmpty()) {
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String tenantId = parsePrefix(from);
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if (tenantId != null && tenantService.getById(tenantId) != null) {
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return tenantId;
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}
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}
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// 群回调：GroupId 查映射
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String groupId = node.get("GroupId").getString();
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if (groupId != null && !groupId.isEmpty()) {
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GroupMapping gm = groupMappingMapper.selectOne(Wrappers.<GroupMapping>lambdaQuery()
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.eq(GroupMapping::getImGroupId, groupId).last("LIMIT 1"));
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if (gm != null) {
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return gm.getTenantId();
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}
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// 群ID也带前缀
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String tid = parsePrefix(groupId);
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if (tid != null && tenantService.getById(tid) != null) {
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return tid;
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}
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}
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return null;
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}
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/**
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* 从带前缀的 IM 标识提取租户码（第一个下划线前部分）
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*/
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private String parsePrefix(String imId) {
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if (imId == null || imId.isEmpty()) {
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return null;
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}
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int idx = imId.indexOf('_');
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if (idx <= 0) {
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return null;
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}
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return imId.substring(0, idx);
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}
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/**
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* 是否为消息类回调（需落 im_message）
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*/
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private boolean isMessageCallback(String command) {
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for (String kw : MSG_COMMAND_KEYWORDS) {
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if (command.contains(kw)) {
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return true;
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}
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}
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return false;
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}
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/**
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* 解析消息体，构造 ImMessage（含幂等键 msg_key）
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*/
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private ImMessage parseMessage(String command, ONode node, String tenantId) {
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String from = node.get("FromAccount").getString();
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String to = node.get("ToAccount").getString();
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if (to == null || to.isEmpty()) {
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to = node.get("ToPlayerId").getString();
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}
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String groupId = node.get("GroupId").getString();
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long msgSeq = node.get("MsgSeq").getLong();
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long msgRandom = node.get("MsgRandom").getLong();
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long msgTs = node.get("MsgTimeStamp").getLong();
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if (msgTs == 0) {
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msgTs = System.currentTimeMillis() / 1000L;
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}
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OffsetDateTime msgTime = OffsetDateTime.ofInstant(Instant.ofEpochSecond(msgTs), ZoneId.systemDefault());
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// msg_key 组合保证全局唯一与幂等（与补拉路径共享 MsgKeys 算法，跨路径去重）
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String convTarget = (groupId != null && !groupId.isEmpty()) ? groupId : (to != null ? to : "");
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String msgKey = MsgKeys.build(from, convTarget, msgSeq, msgRandom);
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ImMessage msg = new ImMessage();
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msg.setMsgKey(msgKey);
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msg.setTenantId(tenantId);
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msg.setMsgTime(msgTime);
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msg.setConvType(groupId != null && !groupId.isEmpty() ? 2 : 1);
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msg.setConvId(groupId != null && !groupId.isEmpty() ? groupId : (to != null ? to : ""));
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msg.setFromAccount(from);
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msg.setToAccount(groupId != null && !groupId.isEmpty() ? null : to);
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msg.setGroupId(groupId);
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msg.setMsgType(node.get("MsgType").getString());
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msg.setMsgBody(node.get("MsgBody").toString());
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msg.setSource("CALLBACK");
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msg.setIsCrossTenant(false);
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msg.setDistStatus(0);
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return msg;
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}
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/**
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* 提取会话ID（用于 dist_queue 保序分桶）
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*/
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private String extractConvId(String command, ONode node) {
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String groupId = node.get("GroupId").getString();
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if (groupId != null && !groupId.isEmpty()) {
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return groupId;
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}
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String to = node.get("ToAccount").getString();
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if (to == null || to.isEmpty()) {
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to = node.get("ToPlayerId").getString();
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}
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return to;
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}
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/**
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* 返回腾讯回调成功响应
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*/
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private String ok() {
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return "{\"ActionStatus\":\"OK\",\"ErrorCode\":0,\"ErrorInfo\":\"\"}";
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}
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}
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