ProxyMap.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; version 3
 * of the License.
 *
 * 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 AsyncComm_ProxyMap_h
#define AsyncComm_ProxyMap_h

#include <AsyncComm/CommBuf.h>

#include <Common/InetAddr.h>
#include <Common/SockAddrMap.h>
#include <Common/String.h>

#include <mutex>

namespace Hypertable {

  class ProxyAddressInfo {
  public:
    ProxyAddressInfo() { }
    ProxyAddressInfo(const String &h, InetAddr a) : hostname(h), addr(a) { }
    String hostname;
    InetAddr addr;
  };

  typedef std::unordered_map<String, ProxyAddressInfo> ProxyMapT;

  class ProxyMap {

  public:

    void update_mapping(const String &proxy, const String &hostname,
                        const InetAddr &addr,ProxyMapT &invalidated_map,
                        ProxyMapT &new_map);

    void update_mappings(String &mappings, ProxyMapT &invalidated_map,
                         ProxyMapT &new_map);

    void remove_mapping(const String &proxy, ProxyMapT &remove_map);

    bool get_mapping(const String &proxy, String &hostname, InetAddr &addr);

    String get_proxy(InetAddr &addr);
    
    void get_map(ProxyMapT &map) {
      map = m_forward_map;
    }

    CommBufPtr create_update_message();

    String to_str();

  private:

    void invalidate_old_mapping(const String &proxy, const InetAddr &addr,
                                ProxyMapT &invalidated_mappings);

    void invalidate(const String &proxy, ProxyMapT &invalidated_mappings);

    std::mutex m_mutex;

    ProxyMapT m_forward_map;

    SockAddrMap<String> m_reverse_map;
  };

}

#endif // AsyncComm_ProxyMap_h