SystemBuilder.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    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.
//

using System;
using System.Collections.Generic;
using System.Linq;

using Deveel.Data.Caching;
using Deveel.Data.Configuration;
using Deveel.Data.Routines;
using Deveel.Data.Security;
using Deveel.Data.Services;
using Deveel.Data.Sql;
using Deveel.Data.Sql.Compile;
using Deveel.Data.Sql.Query;
using Deveel.Data.Sql.Schemas;
using Deveel.Data.Sql.Sequences;
using Deveel.Data.Sql.Tables;
using Deveel.Data.Sql.Triggers;
using Deveel.Data.Sql.Variables;
using Deveel.Data.Sql.Views;
using Deveel.Data.Store;

namespace Deveel.Data {
    public class SystemBuilder {
        public SystemBuilder() 
            : this(new Configuration.Configuration()) {
        }

        public SystemBuilder(IConfiguration configuration) {
            Configuration = configuration;
            ServiceContainer = new ServiceContainer();
        }

        public IConfiguration Configuration { get; set; }

        private ServiceContainer ServiceContainer { get; set; }

        private void RegisterDefaultServices() {
            ServiceContainer.Register<SecurityModule>();

            ServiceContainer.Bind<IRoutineResolver>()
                .To<SystemFunctionsProvider>()
                .InDatabaseScope();

            ServiceContainer.Bind<ISqlCompiler>()
                .To<SqlDefaultCompiler>()
                .InSystemScope();

            ServiceContainer.Bind<IQueryPlanner>()
                .To<QueryPlanner>()
                .InSystemScope();

            ServiceContainer.Bind<ITableCellCache>()
                .To<TableCellCache>()
                .InSystemScope();

            ServiceContainer.Bind<IObjectManager>()
                .To<TableManager>()
                .WithKey(DbObjectType.Table)
                .InTransactionScope();

            ServiceContainer.Bind<IObjectManager>()
                .To<ViewManager>()
                .InTransactionScope()
                .WithKey(DbObjectType.View);

            ServiceContainer.Bind<IObjectManager>()
                .To<SequenceManager>()
                .WithKey(DbObjectType.Sequence)
                .InTransactionScope();

            ServiceContainer.Bind<IObjectManager>()
                .To<TriggerManager>()
                .WithKey(DbObjectType.Trigger)
                .InTransactionScope();

            ServiceContainer.Bind<IObjectManager>()
                .To<SchemaManager>()
                .WithKey(DbObjectType.Schema)
                .InTransactionScope();

            ServiceContainer.Bind<IObjectManager>()
                .To<PersistentVariableManager>()
                .WithKey(DbObjectType.Variable)
                .InTransactionScope();

            ServiceContainer.Bind<IObjectManager>()
                .To<RoutineManager>()
                .WithKey(DbObjectType.Routine)
                .InTransactionScope();

            ServiceContainer.Bind<IStoreSystem>()
                .To<InMemoryStorageSystem>()
                .WithKey(DefaultStorageSystemNames.Heap)
                .InDatabaseScope();

            ServiceContainer.Bind<IStoreSystem>()
                .To<SingleFileStoreSystem>()
                .WithKey(DefaultStorageSystemNames.SingleFile)
                .InDatabaseScope();

#if !PCL
            ServiceContainer.Bind<IFileSystem>()
                .To<LocalFileSystem>()
                .InSystemScope();
#endif
        }

        private ISystemContext BuildContext(out IEnumerable<ModuleInfo> modules) {
            RegisterDefaultServices();

            OnServiceRegistration(ServiceContainer);
            modules = LoadModules();

            return new SystemContext(Configuration, ServiceContainer);
        }

        private IEnumerable<ModuleInfo> LoadModules() {
            var moduleInfo = new List<ModuleInfo>();

            var modules = ServiceContainer.ResolveAll<ISystemModule>();
            foreach (var systemModule in modules) {
                systemModule.Register(ServiceContainer);

                moduleInfo.Add(new ModuleInfo(systemModule.ModuleName, systemModule.Version));
            }

            ServiceContainer.Unregister<ISystemModule>();
            return moduleInfo;
        }

        protected virtual void OnServiceRegistration(ServiceContainer container) {
        }

        public ISystem BuildSystem() {
            IEnumerable<ModuleInfo> modules;
            var context = BuildContext(out modules);
            return new DatabaseSystem(context, modules);
        }
    }
}