MQTemplateProtocolBase.hpp

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/***************************************************************************
  tag: Peter Soetens  Thu Oct 22 11:59:07 CEST 2009  MQTemplateProtocol.hpp

                        MQTemplateProtocol.hpp -  description
                           -------------------
    begin                : Thu October 22 2009
    copyright            : (C) 2009 Peter Soetens
    email                : peter@thesourcworks.com

 ***************************************************************************
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#ifndef ORO_MQ_TEMPATE_PROTOCOL_BASE_HPP
#define ORO_MQ_TEMPATE_PROTOCOL_BASE_HPP

#include "MQLib.hpp"
#include "../../types/TypeMarshaller.hpp"
#include "MQChannelElement.hpp"

#include <boost/type_traits/has_virtual_destructor.hpp>
#include <boost/static_assert.hpp>

namespace RTT
{ namespace mqueue
  {
      template<class T>
      class MQTemplateProtocolBase
          : public RTT::types::TypeMarshaller
      {
      public:
          typedef T UserType;

          virtual base::ChannelElementBase::shared_ptr createStream(base::PortInterface* port, const ConnPolicy& policy, bool is_sender) const {
              try {
                  base::ChannelElementBase::shared_ptr mq = new MQChannelElement<T>(port, *this, policy, is_sender);
                  if ( !is_sender && (policy.pull == ConnPolicy::PULL) ) {
                      // the receiver needs a buffer to store his messages in. For pull connections buildChannelOutput does not add an output buffer, so we add it here:
                      base::ChannelElementBase::shared_ptr buf = detail::DataSourceTypeInfo<T>::getTypeInfo()->buildDataStorage(policy);
                      mq->connectTo(buf);
                  }
                  return mq;
              } catch(std::exception& e) {
                  log(Error) << "Failed to create MQueue Channel element: " << e.what() << endlog();
              }
              return base::ChannelElementBase::shared_ptr();
          }

      };
}
}

#endif