ITRACEController.h

#ifndef OTSDAQ_MESSAGEFACILITY_ITRACECONTROLLER_H
#define OTSDAQ_MESSAGEFACILITY_ITRACECONTROLLER_H

#include <limits.h>
#include <unistd.h>
#include <deque>
#include <string>
#include <unordered_map>

namespace ots
{
class ITRACEController
{
  public:
    struct TraceMasks
    {
        uint64_t M;
        uint64_t S;
        uint64_t T;
    };
    typedef std::unordered_map<std::string, TraceMasks>    TraceLevelMap;
    typedef std::unordered_map<std::string, TraceLevelMap> HostTraceLevelMap;

    ITRACEController() {}
    virtual ~ITRACEController() = default;

    virtual HostTraceLevelMap GetTraceLevels()                                                                                 = 0;
    virtual void              SetTraceLevelMask(std::string trace_name, TraceMasks const& lvl, std::string host = "localhost") = 0;

  protected:
    std::string GetHostnameString()
    {
        char hostname_c[HOST_NAME_MAX];
        gethostname(hostname_c, HOST_NAME_MAX);
        return std::string(hostname_c);
    }
};

class NullTRACEController : public ITRACEController
{
  public:
    NullTRACEController() {}
    virtual ~NullTRACEController() = default;

    HostTraceLevelMap GetTraceLevels() final { return HostTraceLevelMap(); }
    void              SetTraceLevelMask(std::string, TraceMasks const&, std::string) final {}
};

}  // namespace ots

#endif  // OTSDAQ_MESSAGEFACILITY_ITRACECONTROLLER_H