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路由相关信令和协议设计

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enum BuddyListCmdID {
  // ...... 暂时省略无关信令
  CID_BUDDY_LIST_USERS_STATUS_REQUEST = 522,
  CID_BUDDY_LIST_USERS_STATUS_RESPONSE = 523,
  // ...... 暂时省略无关信令
};

message IMUsersStatReq{
	//cmd id:		0x020a
	required uint32 user_id = 1;
	repeated uint32 user_id_list = 2;
	optional bytes attach_data = 20;
}

message IMUsersStatRsp{
	//cmd id:		0x020b
	required uint32 user_id = 1;
	repeated IM.BaseDefine.UserStat user_stat_list = 2;
	optional bytes attach_data = 20;
}

enum UserStatType{
	USER_STATUS_ONLINE 	= 1;
	USER_STATUS_OFFLINE	= 2;
	USER_STATUS_LEAVE	= 3;
}

流程图

具体代码逻辑

在 g_user_map 中根据 user_id 查找对应的状态
如果不在列表设置为下线状态；如果在列表设置为对应的状态；

组包回复

void CRouteConn::_HandleUsersStatusRequest(CImPdu* pPdu)
{
IM::Buddy::IMUsersStatReq msg;
CHECK_PB_PARSE_MSG(msg.ParseFromArray(pPdu->GetBodyData(), pPdu->GetBodyLength()));

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 uint32_t request_id = msg.user_id();
 uint32_t query_count = msg.user_id_list_size();
 log("HandleUserStatusReq, req_id=%u, query_count=%u ", request_id, query_count);

 IM::Buddy::IMUsersStatRsp msg2;
 msg2.set_user_id(request_id);
 msg2.set_attach_data(msg.attach_data());
 list<user_stat_t> result_list;
 user_stat_t status;
 for(uint32_t i = 0; i < query_count; i++)
 {
     IM::BaseDefine::UserStat* user_stat = msg2.add_user_stat_list();
     uint32_t user_id = msg.user_id_list(i);
     user_stat->set_user_id(user_id);
     CUserInfo* pUser = GetUserInfo(user_id);
     if (pUser) {
         user_stat->set_status((::IM::BaseDefine::UserStatType) pUser->GetStatus()) ;
     }
 	else
 	{
         user_stat->set_status(USER_STATUS_OFFLINE) ;
 	}
 }

 // send back query user status
 CImPdu pdu;
 pdu.SetPBMsg(&msg2);
 pdu.SetServiceId(SID_BUDDY_LIST);
 pdu.SetCommandId(CID_BUDDY_LIST_USERS_STATUS_RESPONSE);
 pdu.SetSeqNum(pPdu->GetSeqNum());
 SendPdu(&pdu);

}

CUserInfo* GetUserInfo(uint32_t user_id)
{
CUserInfo* pUser = NULL;
UserInfoMap_t::iterator it = g_user_map.find(user_id);
if (it != g_user_map.end()) {
pUser = it->second;
}

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 return pUser;

}