notification-stream.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NDN_UTIL_NOTIFICATION_STREAM_HPP
#define NDN_UTIL_NOTIFICATION_STREAM_HPP

#include "../name.hpp"
#include "../face.hpp"
#include "../security/key-chain.hpp"

#include "concepts.hpp"

namespace ndn {

namespace util {

template<typename Notification>
class NotificationStream : noncopyable
{
public:
  BOOST_CONCEPT_ASSERT((WireEncodable<Notification>));

  NotificationStream(Face& face, const Name& prefix, KeyChain& keyChain)
    : m_face(face)
    , m_prefix(prefix)
    , m_keyChain(keyChain)
    , m_sequenceNo(0)
  {
  }

  virtual
  ~NotificationStream()
  {
  }

  void
  postNotification(const Notification& notification)
  {
    Name dataName = m_prefix;
    dataName.appendSequenceNumber(m_sequenceNo);

    shared_ptr<Data> data = make_shared<Data>(dataName);
    data->setContent(notification.wireEncode());
    data->setFreshnessPeriod(time::seconds(1));

    m_keyChain.sign(*data);
    m_face.put(*data);

    ++m_sequenceNo;
  }

private:
  Face& m_face;
  const Name m_prefix;
  KeyChain& m_keyChain;
  uint64_t m_sequenceNo;
};

} // namespace util
} // namespace ndn

#endif // NDN_UTIL_NOTIFICATION_STREAM_HPP