Groups.cpp

#include <xrpl/beast/hash/uhash.h>
#include <xrpl/beast/insight/Collector.h>
#include <xrpl/beast/insight/Counter.h>
#include <xrpl/beast/insight/Event.h>
#include <xrpl/beast/insight/Gauge.h>
#include <xrpl/beast/insight/Group.h>
#include <xrpl/beast/insight/Groups.h>
#include <xrpl/beast/insight/Hook.h>
#include <xrpl/beast/insight/HookImpl.h>
#include <xrpl/beast/insight/Meter.h>
 
#include <memory>
#include <string>
#include <unordered_map>
#include <utility>
 
namespace beast {
namespace insight {
 
namespace detail {
 
class GroupImp : public std::enable_shared_from_this<GroupImp>, public Group
{
public:
    std::string const m_name;
    Collector::ptr m_collector;
 
    GroupImp(std::string const& name_, Collector::ptr const& collector)
        : m_name(name_), m_collector(collector)
    {
    }
 
    ~GroupImp() = default;
 
    std::string const&
    name() const override
    {
        return m_name;
    }
 
    std::string
    make_name(std::string const& name)
    {
        return m_name + "." + name;
    }
 
    Hook
    make_hook(HookImpl::HandlerType const& handler) override
    {
        return m_collector->make_hook(handler);
    }
 
    Counter
    make_counter(std::string const& name) override
    {
        return m_collector->make_counter(make_name(name));
    }
 
    Event
    make_event(std::string const& name) override
    {
        return m_collector->make_event(make_name(name));
    }
 
    Gauge
    make_gauge(std::string const& name) override
    {
        return m_collector->make_gauge(make_name(name));
    }
 
    Meter
    make_meter(std::string const& name) override
    {
        return m_collector->make_meter(make_name(name));
    }
 
private:
    GroupImp&
    operator=(GroupImp const&);
};
 
//------------------------------------------------------------------------------
 
class GroupsImp : public Groups
{
public:
    using Items =
        std::unordered_map<std::string, std::shared_ptr<Group>, uhash<>>;
 
    Collector::ptr m_collector;
    Items m_items;
 
    explicit GroupsImp(Collector::ptr const& collector) : m_collector(collector)
    {
    }
 
    ~GroupsImp() = default;
 
    Group::ptr const&
    get(std::string const& name) override
    {
        std::pair<Items::iterator, bool> result(
            m_items.emplace(name, Group::ptr()));
        Group::ptr& group(result.first->second);
        if (result.second)
            group = std::make_shared<GroupImp>(name, m_collector);
        return group;
    }
};
 
}  // namespace detail
 
//------------------------------------------------------------------------------
 
Groups::~Groups() = default;
 
std::unique_ptr<Groups>
make_Groups(Collector::ptr const& collector)
{
    return std::make_unique<detail::GroupsImp>(collector);
}
 
}  // namespace insight
}  // namespace beast