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- ///////////////////////////////////////////////////////////////////////////////
- //
- // Copyright (C) 2008-2012 Artyom Beilis (Tonkikh) <artyomtnk@yahoo.com>
- //
- // See accompanying file COPYING.TXT file for licensing details.
- //
- ///////////////////////////////////////////////////////////////////////////////
- #ifndef CPPCMS_SESSION_STORAGE_H
- #define CPPCMS_SESSION_STORAGE_H
-
- #include <cppcms/defs.h>
- #include <booster/noncopyable.h>
- #include <booster/shared_ptr.h>
- #include <string>
-
- namespace cppcms {
- namespace json {
- class value;
- }
- namespace sessions {
-
- ///
- /// \brief session_server_storage is an abstract class that allows user to implements
- /// custom session storage device like, database storage device
- ///
- /// Note: if the member functions save/load/remove are thread safe -- can be called
- /// from different threads, than you may create a single session and return \a shared_ptr
- /// to a single instance, otherwise you have to create multiple instances of object
- ///
-
- class session_storage : public booster::noncopyable
- {
- public:
- ///
- /// Save session with end of life time at \a timeout using session id \a sid and content \a in
- ///
-
- virtual void save(std::string const &sid,time_t timeout,std::string const &in) = 0;
-
- ///
- /// Load session with \a sid, put its end of life time to \a timeout and return its
- /// value to \a out
- ///
- virtual bool load(std::string const &sid,time_t &timeout,std::string &out) = 0;
-
- ///
- /// Remove a session with id \a sid from the storage
- ///
-
- virtual void remove(std::string const &sid) = 0;
-
- ///
- /// Return true of the save or load operations can be blocking
- ///
- virtual bool is_blocking() = 0;
-
-
- ///
- /// Destroy an object
- ///
- virtual ~session_storage()
- {
- }
- };
-
- ///
- /// \brief The factory is an interface to a factory that creates session_storage objects, it should be thread safe.
- ///
- class session_storage_factory {
- public:
- ///
- /// Get a pointer to session_storage. Note if the returned pointer is same for different calls
- /// session_storage implementation should be thread safe.
- ///
- virtual booster::shared_ptr<session_storage> get() = 0;
-
- ///
- /// Return true if session_storage requires garbage collection - removal of expired session time-to-time
- ///
- virtual bool requires_gc() = 0;
- ///
- /// Actual garbage collection job (if required). If requires_gc returns true it will be called once-in-a-while to remove
- /// all expired objects from the DB.
- ///
- virtual void gc_job() {}
- ///
- /// Delete the object, cleanup
- ///
- virtual ~session_storage_factory() {}
- };
-
- extern "C" {
- typedef session_storage_factory *(*cppcms_session_storage_generator_type)(cppcms::json::value const &options);
- }
-
-
- } // sessions
- } // cppcms
-
-
- #endif
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