message_collection.h

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/*
 * Copyright (c) 2008, Willow Garage, Inc.
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#ifndef MONGO_ROS_MESSAGE_COLLECTION_H
#define MONGO_ROS_MESSAGE_COLLECTION_H

#include <mongo_ros/query_results.h>
#include <ros/ros.h>

namespace mongo_ros
{

template <class M>
class MessageCollection
{
public:

  MessageCollection (const std::string& db_name,
                     const std::string& collection_name,
                     const std::string& db_host="",
                     unsigned db_port=0,
                     float timeout=300.0);

  void insert (const M& msg, const Metadata& metadata = Metadata());

  typename QueryResults<M>::range_t
  queryResults (const mongo::Query& query, bool metadata_only = false,
                const std::string& sort_by = "", bool ascending=true) const;

  std::vector<typename MessageWithMetadata<M>::ConstPtr >
  pullAllResults (const mongo::Query& query, bool metadata_only = false,
                  const std::string& sort_by = "", bool ascending=true) const;

  
  typename MessageWithMetadata<M>::ConstPtr
  findOne (const Query& query, bool metadata_only = false) const;

  unsigned removeMessages (const mongo::Query& query);

  MessageCollection& ensureIndex (const std::string& field);
  
  void modifyMetadata (const Query& q, const Metadata& m);

  unsigned count ();

  bool md5SumMatches () const;
  
private:

  // Called by constructors
  void initialize (const std::string& db, const std::string& coll,
                   const std::string& host, unsigned port,
                   float timeout);

  const std::string ns_;
  boost::shared_ptr<mongo::DBClientConnection> conn_;
  boost::shared_ptr<mongo::GridFS> gfs_;
  bool md5sum_matches_;
  ros::NodeHandle nh_;
  ros::Publisher insertion_pub_;
};


} // namespace

#include "impl/message_collection_impl.hpp"

#endif // include guard