Exemplo n.º 1
0
        protected virtual void Init()
        {
            CheckRuntimeCompatibility();
            isClosed = false;
            isLocal  = baseIdentification.IsLocal();
            // The check if it is a new Database must be executed before object
            // writer initialization. Because Object Writer Init
            // Creates the file so the check (which is based on the file existence
            // would always return false*/
            bool isNewDatabase = IsNewDatabase();

            commitListeners   = new OdbArrayList <ICommitListener>();
            classIntrospector = provider.GetClassIntrospector();
            ISession session = BuildDefaultSession();

            // Object Writer must be created before object Reader
            objectWriter = BuildObjectWriter();
            // Object writer is a two Phase init object
            objectWriter.Init2();
            objectReader = BuildObjectReader();
            AddSession(session, false);
            // If the file does not exist, then a default header must be created
            if (isNewDatabase)
            {
                objectWriter.CreateEmptyDatabaseHeader(OdbTime.GetCurrentTimeInMs(), baseIdentification.GetUserName(), baseIdentification.GetPassword());
            }
            else
            {
                try
                {
                    GetObjectReader().ReadDatabaseHeader(baseIdentification.GetUserName(), baseIdentification.GetPassword());
                }
                catch (ODBAuthenticationRuntimeException e)
                {
                    Close();
                    throw;
                }
            }
            objectWriter.AfterInit();
            objectIntrospector  = BuildObjectIntrospector();
            this.triggerManager = BuildTriggerManager();
            // This forces the initialization of the meta model
            MetaModel metaModel = GetMetaModel();

            if (OdbConfiguration.CheckModelCompatibility())
            {
                CheckMetaModelCompatibility(classIntrospector.Instrospect(metaModel.GetAllClasses()));
            }
            // logically locks access to the file (only for this Virtual machine)
            FileMutex.GetInstance().OpenFile(GetStorageDeviceName());
            // Updates the Transaction Id in the file
            objectWriter.WriteLastTransactionId(GetCurrentTransactionId());
            this.objectWriter.SetTriggerManager(this.triggerManager);
            this.introspectionCallbackForInsert = new DefaultInstrumentationCallbackForStore(this, triggerManager, false);
            this.introspectionCallbackForUpdate = new DefaultInstrumentationCallbackForStore(this, triggerManager, true);
        }