This topic describes how to get started with Log Service SDK for C++ and perform common operations.

Prerequisites

Log Service SDK for C++ is installed. For more information, see Install Log Service SDK for C++.

Sample code

LogClient is a C++ client that you can use to manage Log Service resources, such as projects and Logstores. Before you can use Log Service SDK for C++ to initiate a request, you must initialize a client instance. Example:
#include "client.h"
#include "common.h"
#include <string>
#include <iostream>
#include <unistd.h>
using namespace aliyun_log_sdk_v6;
using namespace std;
int main(int argc,char ** argv)
{
    // The endpoint of Log Service. For more information, see Endpoints. In this example, the endpoint of the China (Hangzhou) region is used. Replace the parameter value with the actual endpoint. 
    string endpoint = "cn-hangzhou.log.aliyuncs.com";
    // The AccessKey ID of your Alibaba Cloud account. For more information, see AccessKey pair. An Alibaba Cloud account has permissions to call all API operations. If you use the AccessKey pair of your Alibaba Cloud account, your resources are exposed to high security risks. We recommend that you log on as a RAM user that has permissions to call API operations or perform routine O&M tasks. 
    string accessKeyId = "";
    // The AccessKey secret of your Alibaba Cloud account. 
    string accessKey = "";
    // The name of the project. 
    string project = "";
    // The name of the Logstore. 
    string logstore = "";
    // The log topic. 
    string topic = "";
    // Create a Log Service client. 
    LOGClient * ptr = new LOGClient(endpoint,accessKeyId,accessKey,LOG_REQUEST_TIMEOUT,"127.0.0.1",false);
    // Construct log data. 
    vector<LogItem> logGroup;
    for (int i = 0;i < 1;++i)
    {
        logGroup.push_back(LogItem());
        LogItem & item =  logGroup.back();
        item.timestamp = time(NULL) ;
        item.source="127.0.0.1";
        item.topic=topic;
        item.data.push_back(make_pair<string,string>("status","200"));
        item.data.push_back(make_pair<string,string>("latency","126"));
    }
    try{
        // Write logs. 
        ptr -> DeleteConsumerGroup(project,logstore,"test-consumer-group");
        uint32_t shardId = 2;
        int32_t beginTime =  time(NULL);
        ptr -> PostLogStoreLogs(project,logstore,topic,logGroup);
        sleep(1);
        ptr -> PostLogStoreLogs(project,logstore,topic,logGroup);
        sleep(1);
        int32_t endTime = time(NULL);
        ptr -> PostLogStoreLogs(project,logstore,topic,logGroup);
        sleep(1);
        ptr -> PostLogStoreLogs(project,logstore,topic,logGroup);
        sleep(1);
        // Query logs. 
        GetCursorResponse beginCursorResp = ptr->GetCursor(project, logstore, shardId, beginTime);
        GetCursorResponse endCursorResp = ptr->GetCursor(project, logstore, shardId, endTime);
        GetBatchLogResponse getLogResp = ptr->GetBatchLog(project, logstore, shardId, 1000, beginCursorResp.result);
        cout << getLogResp.result.logGroups.size() << "\t" << getLogResp.result.logGroupCount << endl;
        getLogResp = ptr->GetBatchLog(project, logstore, 2, 1000, beginCursorResp.result, endCursorResp.result);
        cout << getLogResp.result.logGroups.size() << "\t" << getLogResp.result.logGroupCount << endl;

        ListConsumerGroupResponse lrs = ptr -> ListConsumerGroup(project, logstore);
        for(int i = 0; i < lrs.consumerGroups.size(); ++i)
            cout<<lrs.consumerGroups[i].GetConsumerGroupName()<<", " <<lrs.consumerGroups[i].GetTimeoutInSec()<<", " <<lrs.consumerGroups[i].GetInOrder()<<endl;
        ptr->UpdateCheckpoint(project, logstore, "hahhah", 0, "V0hBVFRIRlVDSw==");
        ListCheckpointResponse lcps = ptr -> ListCheckpoint(project, logstore, "hahhah");
        for(int i =0; i < lcps.consumerGroupCheckpoints.size(); ++i)
        {
            cout<<lcps.consumerGroupCheckpoints[i].GetShard() <<", " << lcps.consumerGroupCheckpoints[i].GetCheckpoint()<<", "<<lcps.consumerGroupCheckpoints[i].GetUpdateTime()<<endl;
        }
        while(true){
            HeartbeatResponse resp = ptr->ConsumerGroupHeartbeat(project, logstore, "hahhah", "cc1", std::vector<uint32_t>());
            cout<<"cc1, heartbeat: ";
            for(std::vector<uint32_t>::const_iterator it = resp.shards.begin(); it != resp.shards.end(); ++it)
                cout<<*it<<", ";
            cout<<endl;
            resp = ptr->ConsumerGroupHeartbeat(project, logstore, "hahhah", "cc2", std::vector<uint32_t>());
            cout<<"cc2, heartbeat: ";
            for(std::vector<uint32_t>::const_iterator it = resp.shards.begin(); it != resp.shards.end(); ++it)
                cout<<*it<<", ";
            cout<<endl;
            usleep(2 * 1000 * 1000);
        }
    }
    catch(LOGException & e)
    {
        cout<<e.GetErrorCode()<<":"<<e.GetMessage()<<endl;
    }
    delete ptr;
}
For more information about sample code, see Alibaba Cloud Log Service SDK for C++.