#ifndef  __VF_h_
#define  __VF_h_

#include "../misc_framework/DataNodes.h"

struct VFDataFields
{
  DataNode::Integer buyVolume;
  DataNode::Integer sellVolume;
  DataNode::Integer expectedVelocity;
};

class VFDataNode : public DataNode
{
private:
  enum { bmValue, bmDebug };

  const std::string _symbol;

  VFDataFields _data;
  bool _valid;
  virtual void onBroadcast(BroadcastMessage &message, int msgId);

  VFDataNode(DataNodeArgument const &args);
  ~VFDataNode();
  friend class DataNode;

public:
  bool getValid() const { return _valid; }
  VFDataFields const &getData() const { return _data; }

  static DataNodeLink *find(DataNodeListener *listener, int msgId,
                            VFDataNode *&node,
                            std::string const &symbol); 
  static DataNodeLink *find(VFDataNode *&node,
                            std::string const &symbol)
  { return find(NULL, 0, node, symbol); }

  // This is only required to make the debugger available sooner.  If you
  // don't need the debugger, or you can wait until at least one of these
  // has been created, you don't need to call this.  Call this only in the
  // data node thread.
  static void init();
};


#endif