MetricsHandler.h

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/* -*- c++ -*-
 * Copyright (C) 2007-2015 Hypertable, Inc.
 *
 * This file is part of Hypertable.
 *
 * Hypertable is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or any later version.
 *
 * Hypertable is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */


#ifndef FsBroker_Lib_MetricsHandler_h
#define FsBroker_Lib_MetricsHandler_h

#include <AsyncComm/Comm.h>
#include <AsyncComm/DispatchHandler.h>

#include <Common/MetricsCollectorGanglia.h>
#include <Common/MetricsProcess.h>
#include <Common/Properties.h>
#include <Common/metrics>

#include <memory>
#include <mutex>

namespace Hypertable {
namespace FsBroker {
namespace Lib {


  class MetricsHandler : public DispatchHandler {
  public:

    MetricsHandler(PropertiesPtr &props, const std::string &type);

    virtual ~MetricsHandler() {};

    void start_collecting();

    void stop_collecting();

    virtual void handle(EventPtr &event);

    void add_bytes_read(int64_t count) {
      std::lock_guard<std::mutex> lock(m_mutex);
      m_bytes_read += count;
    }

    void add_bytes_written(int64_t count) {
      std::lock_guard<std::mutex> lock(m_mutex);
      m_bytes_written += count;
    }

    void add_sync(int64_t latency_nsec) {
      std::lock_guard<std::mutex> lock(m_mutex);
      m_syncs++;
      m_sync_latency += (int)(latency_nsec/1000000LL);
    }

    void increment_error_count() {
      std::lock_guard<std::mutex> lock(m_mutex);
      m_errors++;
    }

  private:
    std::mutex m_mutex;

    Comm *m_comm;

    MetricsCollectorGangliaPtr m_ganglia_collector;

    MetricsProcess m_metrics_process;

    std::string m_type;

    int32_t m_collection_interval {};

    int64_t m_last_timestamp;

    int64_t m_bytes_written {};

    int64_t m_bytes_read {};

    int32_t m_sync_latency {};

    int32_t m_syncs {};

    int32_t m_errors {};

  };

  typedef std::shared_ptr<MetricsHandler> MetricsHandlerPtr;


}}}

#endif // FsBroker_Lib_MetricsHandler_h