Program Listing for File message_collection.h

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// Copyright 2008 Willow Garage, Inc.
//
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// modification, are permitted provided that the following conditions are met:
//
//    * Redistributions of source code must retain the above copyright
//      notice, this list of conditions and the following disclaimer.
//
//    * Redistributions in binary form must reproduce the above copyright
//      notice, this list of conditions and the following disclaimer in the
//      documentation and/or other materials provided with the distribution.
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//    * Neither the name of the Willow Garage, Inc. nor the names of its
//      contributors may be used to endorse or promote products derived from
//      this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#ifndef WAREHOUSE_ROS_MONGO_MESSAGE_COLLECTION_H
#define WAREHOUSE_ROS_MONGO_MESSAGE_COLLECTION_H

#include <warehouse_ros/message_collection.h>
#include <warehouse_ros_mongo/query_results.h>

namespace warehouse_ros_mongo
{
using warehouse_ros::MessageCollectionHelper;
using warehouse_ros::Metadata;
using warehouse_ros::Query;
using warehouse_ros::ResultIteratorHelper;

class MongoMessageCollection : public warehouse_ros::MessageCollectionHelper
{
public:
  MongoMessageCollection(const std::shared_ptr<mongo::DBClientConnection>& conn, const std::string& db_name,
                         const std::string& collection_name);

  bool initialize(const std::string& datatype, const std::string& md5);

  void ensureIndex(const std::string& field);

  void insert(char* msg, size_t msg_size, Metadata::ConstPtr metadata);

  ResultIteratorHelper::Ptr query(Query::ConstPtr query, const std::string& sort_by, bool ascending) const;

  unsigned removeMessages(Query::ConstPtr query);

  void modifyMetadata(Query::ConstPtr q, Metadata::ConstPtr m);

  unsigned count();

  std::string collectionName() const;

  Query::Ptr createQuery() const
  {
    return Query::Ptr(new MongoQuery());
  }

  Metadata::Ptr createMetadata() const
  {
    return Metadata::Ptr(new MongoMetadata());
  }

private:
  void listMetadata(mongo::Query& mquery, std::vector<mongo::BSONObj>& metas);

  inline MongoMetadata& downcastMetadata(Metadata::ConstPtr metadata) const
  {
    return *(const_cast<MongoMetadata*>(static_cast<const MongoMetadata*>(metadata.get())));
  }

  inline MongoQuery& downcastQuery(Query::ConstPtr query) const
  {
    return *(const_cast<MongoQuery*>(static_cast<const MongoQuery*>(query.get())));
  }

  std::shared_ptr<mongo::DBClientConnection> conn_;
  std::shared_ptr<mongo::GridFS> gfs_;
  const std::string ns_;
  const std::string db_;
  const std::string coll_;
};

}  // namespace warehouse_ros_mongo

#endif  // include guard