transport_hints.h

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/*
 * Copyright (C) 2009, Willow Garage, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
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 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#ifndef ROSCPP_TRANSPORT_HINTS_H
#define ROSCPP_TRANSPORT_HINTS_H

#include "common.h"
#include "ros/forwards.h"

#include <boost/lexical_cast.hpp>

namespace ros
{

class ROSCPP_DECL TransportHints
{
public:
  TransportHints& reliable()
  {
    tcp();

    return *this;
  }

  TransportHints& tcp()
  {
    transports_.push_back("TCP");
    return *this;
  }

  TransportHints& tcpNoDelay(bool nodelay = true)
  {
    options_["tcp_nodelay"] = nodelay ? "true" : "false";
    return *this;
  }

  bool getTCPNoDelay()
  {
    M_string::iterator it = options_.find("tcp_nodelay");
    if (it == options_.end())
    {
      return false;
    }

    const std::string& val = it->second;
    if (val == "true")
    {
      return true;
    }

    return false;
  }

  TransportHints& maxDatagramSize(int size)
  {
    options_["max_datagram_size"] = boost::lexical_cast<std::string>(size);
    return *this;
  }

  int getMaxDatagramSize()
  {
    M_string::iterator it = options_.find("max_datagram_size");
    if (it == options_.end())
    {
      return 0;
    }

    return boost::lexical_cast<int>(it->second);
  }

  TransportHints& unreliable()
  {
    udp();

    return *this;
  }

  TransportHints& udp()
  {
    transports_.push_back("UDP");
    return *this;
  }

  const V_string& getTransports() { return transports_; }
  const M_string& getOptions() { return options_; }

private:
  V_string transports_;
  M_string options_;
};

}

#endif