FileMonitor.h

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/*
 * FileMonitor.h
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#include "Component.h"
#include "core/Node.h"
#include <ibrcommon/data/File.h>
#include <ibrcommon/net/vsocket.h>
#include <ibrcommon/net/socket.h>
#include <map>

#ifndef FILEMONITOR_H_
#define FILEMONITOR_H_

namespace dtn
{
        namespace net
        {
                class inotifysocket : ibrcommon::basesocket
                {
                public:
                        inotifysocket();
                        virtual ~inotifysocket();

                        virtual void up() throw (ibrcommon::socket_exception);
                        virtual void down() throw (ibrcommon::socket_exception);

                        void watch(const ibrcommon::File &path, int opts) throw (ibrcommon::socket_exception);

                        ssize_t read(char *data, size_t len) throw (ibrcommon::socket_exception);

                private:

                        typedef std::map<int, ibrcommon::File> watch_map;
                        watch_map _watch_map;
                };

                class FileMonitor : public dtn::daemon::IndependentComponent
                {
                public:
                        FileMonitor();
                        virtual ~FileMonitor();

                        void watch(const ibrcommon::File &watch);

                        const std::string getName() const;

                protected:
                        void componentUp() throw ();
                        void componentRun() throw ();
                        void componentDown() throw ();

                        void __cancellation() throw ();

                private:
                        void scan();
                        bool isActive(const ibrcommon::File &path) const;

                        void adopt(const ibrcommon::File &path);

                        ibrcommon::File _watch;
                        ibrcommon::vsocket _socket;

                        typedef std::set<ibrcommon::File> watch_set;
                        watch_set _watchset;

                        bool _running;

                        std::map<ibrcommon::File, dtn::core::Node> _active_paths;

                };
        }
} /* namespace ibrcommon */
#endif /* FILEMONITOR_H_ */