text: //------------------------------------------------------------------------------
  /*
      This file is part of Beast: https://github.com/vinniefalco/Beast
      Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
  
      Permission to use, copy, modify, and/or distribute this software for any
      purpose  with  or without fee is hereby granted, provided that the above
      copyright notice and this permission notice appear in all copies.
  
      THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
      WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
      MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
      ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
      WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
      ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
      OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
  //==============================================================================
  
  #include <ripple/beast/insight/NullCollector.h>
  
  namespace beast {
  namespace insight {
  
  namespace detail {
  
  class NullHookImpl : public HookImpl
  {
  public:
      explicit NullHookImpl() = default;
  
  private:
      NullHookImpl& operator= (NullHookImpl const&);
  };
  
  //------------------------------------------------------------------------------
  
  class NullCounterImpl : public CounterImpl
  {
  public:
      explicit NullCounterImpl() = default;
  
      void increment (value_type) override
      {
      }
  
  private:
      NullCounterImpl& operator= (NullCounterImpl const&);
  };
  
  //------------------------------------------------------------------------------
  
  class NullEventImpl : public EventImpl
  {
  public:
      explicit NullEventImpl() = default;
  
      void notify (value_type const&) override
      {
      }
  
  private:
      NullEventImpl& operator= (NullEventImpl const&);
  };
  
  //------------------------------------------------------------------------------
  
  class NullGaugeImpl : public GaugeImpl
  {
  public:
      explicit NullGaugeImpl() = default;
  
      void set (value_type) override
      {
      }
  
      void increment (difference_type) override
      {
      }
  
  private:
      NullGaugeImpl& operator= (NullGaugeImpl const&);
  };
  
  //------------------------------------------------------------------------------
  
  class NullMeterImpl : public MeterImpl
  {
  public:
      explicit NullMeterImpl() = default;
  
      void increment (value_type) override
      {
      }
  
  private:
      NullMeterImpl& operator= (NullMeterImpl const&);
  };
  
  //------------------------------------------------------------------------------
  
  class NullCollectorImp : public NullCollector
  {
  private:
  public:
      NullCollectorImp() = default;
  
      ~NullCollectorImp() = default;
  
      Hook make_hook (HookImpl::HandlerType const&) override
      {
          return Hook (std::make_shared <detail::NullHookImpl> ());
      }
  
      Counter make_counter (std::string const&) override
      {
          return Counter (std::make_shared <detail::NullCounterImpl> ());
      }
  
      Event make_event (std::string const&) override
      {
          return Event (std::make_shared <detail::NullEventImpl> ());
      }
  
      Gauge make_gauge (std::string const&) override
      {
          return Gauge (std::make_shared <detail::NullGaugeImpl> ());
      }
  
      Meter make_meter (std::string const&) override
      {
          return Meter (std::make_shared <detail::NullMeterImpl> ());
      }
  };
  
  }
  
  //------------------------------------------------------------------------------
  
  std::shared_ptr <Collector> NullCollector::New ()
  {
      return std::make_shared <detail::NullCollectorImp> ();
  }
  
  }
  }
  