前提

成功创建：集群，表格组，tb_online表

tb_online表描述文件table_test.proto如下：（tcaplusservice.optionv1.proto为依赖表）

syntax = "proto3";

package myTcaplusTable;
//import tcaplusdb extensions
import "tcaplusservice.optionv1.proto";

message tb_online {
    //define primary key
    option(tcaplusservice.tcaplus_primary_key) = "openid,tconndid,timekey";
    //primary key fields
    int32 openid = 1; //QQ Uin
    int32 tconndid = 2;
    string timekey = 3;

    //non-primary key fields
    string gamesvrid = 4;
    int32 logintime = 5 ;
    repeated int64 lockid = 6;
    pay_info pay = 7;

    message pay_info {
        uint64 total_money = 1;
        uint64 pay_times = 2;
    }

}

定义配置参数

// 目标业务的tcapdir地址
static const char DIR_URL_ARRAY[][TCAPLUS_MAX_STRING_LENGTH] =
{
   "tcp://10.191.***.99:9999"
};
// 目标业务的tcapdir 地址个数
static const int32_t DIR_URL_COUNT = 1;

// 目标业务的集群ID
static const int32_t APP_ID = 3;
// 目标业务的表格组ID
static const int32_t ZONE_ID = 1;
// 目标业务的业务密码
static const char * SIGNATURE = "*******";
// 目标业务的表名 tb_online
static const char * TABLE_NAME = "tb_online";

初始化TcaplusPB客户端

//Tcaplus PB API客户端
TcaplusAsyncPbApi g_stAsyncApi;
int32_t InitAsyncPbApi()
{
    //PB API配置
    ClientOptions cfg;
    cfg.app_id = APP_ID;
    cfg.zones.push_back(ZONE_ID);
    strcpy(cfg.signature, SIGNATURE);
    for (int32_t i = 0; i < DIR_URL_COUNT; i++)
    {
        cfg.dirs.push_back(DIR_URL_ARRAY[i]);
    }
    //访问的PB表
    cfg.tables.push_back(TABLE_NAME);
    //日志配置
    strncpy(cfg.log_cfg, "tlogconf.xml", sizeof(cfg.log_cfg));
    //初始化连接超时时间5s
    cfg.timeout = 5000;

    //初始化连接
    int32_t iRet = g_stAsyncApi.Init(cfg);
    if (0 != iRet)
    {
        cout << "ERROR: g_stAsyncApi.Init failed, log cfg: " << cfg.log_cfg << ", iRet: " << iRet << "." << endl;
        return iRet;
    }
    return iRet;
}

定义异步回调

class CommonCallback : public TcaplusPbCallback
{
public:
    CommonCallback()
    {
        cout << "Init CommonCallback." << endl;
    }

    ~CommonCallback()
    {
        cout << "Fini ~CommonCallback." << endl;
    }

    int OnRecv(const NS_TCAPLUS_PROTOBUF_API::IndexGetRequest &req, NS_TCAPLUS_PROTOBUF_API::IndexGetResponse *res)
    {
        cout << "req " << (void *)&req << endl;
        g_dwTotalRevNum++;
        for (size_t idx = 0; idx < res->m_vecMsg.size(); idx++)
        {
            tb_online_index* t = dynamic_cast<tb_online_index *>(res->m_vecMsg[idx]);
            if (NULL == t)
            {
                cout << "ERROR: msgs[" << idx << "] not tb_online_index type." << endl;
                return -1;
            }

            cout << "---------- receive a response----------:" << endl;
            cout << "openid=" << t->openid() << endl;
            cout << "tconndid=" << t->tconndid() << endl;
            cout << "timekey=" << t->timekey() << endl;
            cout << "gamesvrid=" << t->gamesvrid() << endl;
            cout << "logintime=" << t->logintime() << endl;
            for (int32_t i = 0; i < t->lockid_size();i++)
            {
                cout << "lockid[" << i << "]=" << t->lockid(i) << endl;
            }
            tb_online_index_pay_info pay = t->pay();
            cout << "pay total_money=" << pay.total_money() << "; pay_times=" << pay.pay_times() << endl;

            std::string version;
            int iRet = g_stAsyncApi.GetMessageOption(*t, NS_TCAPLUS_PROTOBUF_API::MESSAGE_OPTION_DATA_VERSION, &version);
            cout << "after GetMessageOption iRet= [" << iRet << "] version:" << version.c_str() << " msg:" << &t << endl;
        }

        cout << "Total: " << res->m_nTotalNum << ", Remain: " << res->m_nRemainNum << endl;

        //If you does not call Set MESSAGE_OPTION_MESSAGE_AUTO_RELEASE option, you have to release res manually.
        //delete res;

        return 0;
    }

    int one rror(const std::vector< ::google::protobuf::Message *> &msgs, int errorcode)
    {
        g_dwTotalRevNum++;
        for (size_t idx = 0; idx < msgs.size(); idx++)
        {
            tb_online_index* t = dynamic_cast<tb_online_index *>(msgs[idx]);
            if (NULL == t)
            {
                cout << "ERROR: msgs[" << idx << "] not tb_online_index type." << endl;
                return -1;
            }

            if (TcapErrCode::TXHDB_ERR_RECORD_NOT_EXIST == errorcode)
            {
                cout << "ERROR: openid= " << t->openid() << ", tconndid= " << t->tconndid() << ", timekey= " << t->timekey() << ", record not exists" << endl;
            }
            cout << "openid = [" << t->openid() << "], tconndid = [" << t->tconndid() << "], timekey =[" << t->timekey() << "] failed:%d"  << errorcode << endl;
        }

        return 0;
    }

    int OnTimeout(const std::vector< ::google::protobuf::Message *> &msgs)
    {
        for (size_t idx = 0; idx < msgs.size(); idx++)
        {
            tb_online_index* t = dynamic_cast<tb_online_index *>(msgs[idx]);
            if (NULL == t)
            {
                cout << "TIMEOUT: msgs[" << idx << "] not tb_online_index type!" << endl;
                return -1;
            }

            cout << "TIMEOUT: openid = [" << t->openid() << "], tconndid = [" << t->tconndid() << "], timekey =[" << t->timekey() << "] timeout" << endl;
        }

        return 0;
    }

    int OnFinish(const NS_TCAPLUS_PROTOBUF_API::MsgParam ¶m)
    {
        cout << "OnFinish: " << param.m_nOperation << " req: " << param.m_vecMsgs.size() << endl;
        return 0;
    }
};

发送本地索引查询请求

void SendGetRequest(struct schedule * S, void* arg)
{
    static tb_online_index t;
    t.set_openid(1);
    t.set_tconndid(1);

    cout << "Get By Index INIT: openid= " << t.openid() << ", tconndid= " << t.tconndid() << endl;

    //Set session resource auto release
    //g_stAsyncApi.SetMessageOption(t, NS_TCAPLUS_PROTOBUF_API::MESSAGE_OPTION_MESSAGE_AUTO_RELEASE, "");

    static CommonCallback cb;

    static NS_TCAPLUS_PROTOBUF_API::IndexGetRequest req;
    cout << "req: " << (void *)&req << endl;
    req.m_strIndexName = "index_openid_tconndid";
    req.m_pMsg = &t;
    req.m_iOffset = 0;
    req.m_iLimit = 10;

    int32_t iRet = g_stAsyncApi.Get(req, &cb);
    if (iRet != TcapErrCode::GEN_ERR_SUC)
    {
        cout << "ERROR: openid= " << t.openid() << ", tconndid= " << t.tconndid() << ", timekey= " << t.timekey() << ", Get Error iRet = " << iRet << endl;
    }
}

示例

main.cpp

int main(void) {

    //初始化API客户端
    int ret = InitAsyncPbApi();
    if ( ret != 0)
    {
        printf("InitAsyncPbApi failed\n");
        return -1;
    }

    //发送请求
    ret = SendListGetRequest();
    if (0 != ret)
    {
        printf("SendAddRequest failed\n");
        return -1;
    }

    //接收响应
    do
    {
        // 更新，接收回包
        g_stAsyncApi.UpdateNetwork();
        usleep(1000 * 10);
    } while (g_dwTotalRevNum != 1);
    return 0;
}

---

TcaplusDB是腾讯出品的分布式NoSQL数据库，存储和调度的代码完全自研。具备缓存+落地融合架构、PB级存储、毫秒级时延、无损水平扩展和复杂数据结构等特性。同时具备丰富的生态、便捷的迁移、极低的运维成本和五个九高可用等特点。客户覆盖游戏、互联网、政务、金融、制造和物联网等领域。