PeerDiscovery.h

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#ifndef _MADARA_FILTERS_PEER_DISCOVERY_H_
#define _MADARA_FILTERS_PEER_DISCOVERY_H_

#include <string>
#include <vector>
#include <map>
#include <list>
#include "madara/knowledge/KnowledgeRecord.h"
#include "madara/knowledge/Functions.h"
#include "madara/utility/StdInt.h"
#include "madara/MadaraExport.h"
#include "madara/transport/TransportContext.h"
#include "madara/knowledge/ExternFunctionVariables.h"
#include "madara/knowledge/containers/Map.h"

#include "AggregateFilter.h"

namespace madara
{
  namespace filters
  {
    class MADARA_EXPORT PeerDiscovery : public AggregateFilter
    {
    public:
      PeerDiscovery (
        const std::string & prefix = ".peers",
        knowledge::KnowledgeRecord::Integer heart_beat = -1);

      virtual ~PeerDiscovery ();

      virtual void filter (knowledge::KnowledgeMap & records,
        const transport::TransportContext & transport_context,
        knowledge::Variables & vars);

    protected:

      bool initialized_;

      std::string prefix_;

      knowledge::containers::Map peers_;

      knowledge::KnowledgeRecord::Integer heart_beat_;

      knowledge::KnowledgeRecord::Integer last_clear_;
    };
  }
}

#endif  // _MADARA_FILTERS_PEER_DISCOVERY_H_