Hi Vijay,

I found one question in openbmc/phosphor-health-monitor

The service healthMon via above functions created has not the org.freedesktop.DBus.ObjectManager on the root,
and this will cause the sensor not be generated correctly via redfish url /redfish/v1/Chassis/chassis/Sensors/CPU, /redfish/v1/Chassis/chassis/Sensors/Memory

Because redfish will method GetSubTree to collect sensors via org.freedesktop.DBus.ObjectManager

I found a solution for your reference and show at bellow, you can use sdbusplus/server/manager.hpp which provide a function to add ObjectManager on the root.

Hence, I can get CPU, Memory information correctly via redfish url /redfish/v1/Chassis/chassis/Sensors/CPU, /redfish/v1/Chassis/chassis/Sensors/Memory

#include <sdbusplus/server/manager.hpp>

class HealthMon

{

  public:

    HealthMon() = delete;

    HealthMon(const HealthMon&) = delete;

    HealthMon& operator=(const HealthMon&) = delete;

    HealthMon(HealthMon&&) = delete;

    HealthMon& operator=(HealthMon&&) = delete;

    virtual ~HealthMon() = default;

    /** @brief Constructs HealthMon

     *

     * @param[in] bus     - Handle to system dbus

     */

    HealthMon(sdbusplus::bus::bus& bus) : bus(bus)

    {

        // read json file

        sensorConfigs = getHealthConfig();

        createHealthSensors();

add_manager("/");

    }

    /** @brief Parsing Health config JSON file  */

    Json parseConfigFile(std::string configFile);

    /** @brief reading config for each health sensor component */

    void getConfigData(Json& data, HealthConfig& cfg);

    /** @brief Map of the object HealthSensor */

    std::unordered_map<std::string, std::shared_ptr<HealthSensor>>

        healthSensors;

    /** @brief Create sensors for health monitoring */

    void createHealthSensors();

void add_manager(const std::string& path)

    {

        managers_.emplace_back(

            std::make_unique<sdbusplus::server::manager::manager>(

                sdbusplus::server::manager::manager(

                bus, path.c_str())));

    }

  private:

    sdbusplus::bus::bus& bus;

    std::vector<HealthConfig> sensorConfigs;

    std::vector<HealthConfig> getHealthConfig();

std::vector<std::unique_ptr<sdbusplus::server::manager::manager>> managers_;

};

This pic is the add org.freedesktop.DBus.ObjectManager on the root for reference.

Best Regards,

Bruce