{

friend class Monitoring;

public:

/// Prepares externam software commands (ps)

ProcessMonitor();

/// Default destructor

~ProcessMonitor() = default;

/// Generates performance metrics (stored in mPsParams vecotr)

std::vector<Metric> getPidStatus();

/// Generates metrics per network interface: bytesReceived, bytesTransmitted

std::vector<Metric> getNetworkUsage();

private:

/// PIDs that are monitored

unsigned int mPid;

/// options to be passed to PS

std::string mPsCommand;

/// mutex to lock vector of PIDs

std::mutex mVectorPidLock;

/// List of PS params with their types

const std::vector<std::pair<std::string, MetricType>> mPsParams {

{"etime", MetricType::STRING}, {"pcpu", MetricType::DOUBLE}, {"pmem", MetricType::DOUBLE}

};

/// Executes terminal command

std::string exec(const char* cmd);