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/**
* Copyright (C) 2013 Regents of the University of California.
* @author: Jeff Thompson <jefft0@remap.ucla.edu>
* See COPYING for copyright and distribution information.
*/
#ifndef NDN_FACE_HPP
#define NDN_FACE_HPP
#include "node.hpp"
#include "transport/tcp-transport.hpp"
namespace ndn {
/**
* The Face class provides the main methods for NDN communication.
*/
class Face {
public:
/**
* Create a new Face for communication with an NDN hub with the given Transport object and connectionInfo.
* @param transport A shared_ptr to a Transport object used for communication.
* @param transport A shared_ptr to a Transport::ConnectionInfo to be used to connect to the transport.
*/
Face(const ptr_lib::shared_ptr<Transport>& transport, const ptr_lib::shared_ptr<const Transport::ConnectionInfo>& connectionInfo)
: node_(transport, connectionInfo)
{
}
/**
* Create a new Face for communication with an NDN hub at host:port using the default TcpTransport.
* @param host The host of the NDN hub.
* @param port The port of the NDN hub. If omitted. use 9695.
*/
Face(const char *host, unsigned short port = 9695)
: node_(ptr_lib::make_shared<TcpTransport>(),
ptr_lib::make_shared<TcpTransport::ConnectionInfo>(host, port))
{
}
/**
* Send the Interest through the transport, read the entire response and call onData(interest, data).
* @param interest A reference to the Interest. This copies the Interest.
* @param onData A function object to call when a matching data packet is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param onTimeout A function object to call if the interest times out. If onTimeout is an empty OnTimeout(), this does not use it.
* This copies the function object, so you may need to use func_lib::ref() as appropriate.
*/
void expressInterest(const Interest& interest, const OnData& onData, const OnTimeout& onTimeout = OnTimeout())
{
node_.expressInterest(interest, onData, onTimeout);
}
/**
* Encode name as an Interest. If interestTemplate is not 0, use its interest selectors.
* Send the interest through the transport, read the entire response and call onData(interest, data).
* @param name A reference to a Name for the interest. This copies the Name.
* @param interestTemplate if not 0, copy interest selectors from the template. This does not keep a pointer to the Interest object.
* @param onData A function object to call when a matching data packet is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param onTimeout A function object to call if the interest times out. If onTimeout is an empty OnTimeout(), this does not use it.
* This copies the function object, so you may need to use func_lib::ref() as appropriate.
*/
void expressInterest(const Name& name, const Interest *interestTemplate, const OnData& onData, const OnTimeout& onTimeout = OnTimeout());
/**
* Encode name as an Interest, using a default interest lifetime.
* Send the interest through the transport, read the entire response and call onData(interest, data).
* @param name A reference to a Name for the interest. This copies the Name.
* @param onData A function object to call when a matching data packet is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param onTimeout A function object to call if the interest times out. If onTimeout is an empty OnTimeout(), this does not use it.
* This copies the function object, so you may need to use func_lib::ref() as appropriate.
*/
void expressInterest(const Name& name, const OnData& onData, const OnTimeout& onTimeout = OnTimeout())
{
expressInterest(name, 0, onData, onTimeout);
}
/**
* Register prefix with the connected NDN hub and call onInterest when a matching interest is received.
* @param prefix A reference to a Name for the prefix to register. This copies the Name.
* @param onInterest A function object to call when a matching interest is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param flags The flags for finer control of which interests are forward to the application.
*/
void registerPrefix(const Name& prefix, const OnInterest& onInterest, int flags = 0)
{
node_.registerPrefix(prefix, onInterest, flags);
}
/**
* Process any data to receive or call timeout callbacks.
* This is non-blocking and will return immediately if there is no data to receive.
* You should repeatedly call this from an event loop, with calls to sleep as needed so that the loop doesn't use 100% of the CPU.
* @throw This may throw an exception for reading data or in the callback for processing the data. If you
* call this from an main event loop, you may want to catch and log/disregard all exceptions.
*/
void processEvents()
{
// Just call Node's processEvents.
node_.processEvents();
}
/**
* Shut down and disconnect this Face.
*/
void shutdown();
private:
Node node_;
};
}
#endif