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message_collection.h
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message_collection.h
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// Copyright 2008 Willow Garage, Inc.
//
// Redistribution and use in source and binary forms, with or without
// 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.
//
// * 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.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
/**
* \file
*
* The MessageCollection class
*
* \author Bhaskara Marthi
*/
#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);
/// \post Ensure that there's an index on the given field.
/// Note that index on _id and creation_time are always created.
void ensureIndex(const std::string& field);
/// \brief Insert a ROS message, together with some optional metadata,
/// into the db
/// \throws mongo::DBException if unable to insert
void insert(char* msg, size_t msg_size, Metadata::ConstPtr metadata);
/// \retval Iterator range over matching messages
/// \param query A metadata object representing a query.
/// \param metadata_only If this is true, only retrieve the metadata
/// (returned message objects will just be default constructed)
ResultIteratorHelper::Ptr query(Query::ConstPtr query, const std::string& sort_by, bool ascending) const;
/// \brief Remove messages matching query
unsigned removeMessages(Query::ConstPtr query);
/// \brief Modify metadata
/// Find message matching \a q and update its metadata using \a m
/// In other words, overwrite keys in the message using \a m, but
/// keep keys that don't occur in \a m.
void modifyMetadata(Query::ConstPtr q, Metadata::ConstPtr m);
/// \brief Count messages in collection
unsigned count();
/// \brief Return name of collection
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