Exemplo n.º 1
0
        private static async Task Main(string[] args)
        {
            Console.WriteLine("Program started...");

            // global::HibernatingRhinos.Profiler.Appender.NHibernate.NHibernateProfiler.Initialize();

            var binder     = new VersionedBinder();
            var serializer = new JsonNetSerializer(binder);

            CreateDbIfNotExisting();

            var nHibernateResetConfigurationProvider = new NHibernateResetConfigurationProvider(
                GetBaseConfiguration(),
                new[]
            {
                typeof(PersistentEntity).Assembly,
                typeof(RawStreamEntry).Assembly,
                typeof(CheckpointInfo).Assembly
            });



            var configuration  = nHibernateResetConfigurationProvider.GetConfigurationForTypes(typeof(RawStreamEntry), typeof(CheckpointInfo), typeof(PersistentEntity));
            var sessionFactory = configuration.BuildSessionFactory();


            var bus = new ObservableMessageBus();
            var persistenceEngine = new PersistenceEngine(sessionFactory, configuration, serializer);

            await persistenceEngine.InitializeAsync();

            var repo = new EventRepository(
                new DefaultInstanceProvider(),
                persistenceEngine,
                new RawStreamEntryFactory());



            // let bus subscribe to repository and publish its committed events
            repo.SubscribeTo <IMessage <IEvent> >()
            .Subscribe((e) => bus.Publish(e));

            // normal event processing
            bus.SubscribeTo <IMessage <IEvent> >().Subscribe((e) =>
            {
                Console.WriteLine("Look, an event: " + e.ToString());
            });

            bus.SubscribeTo <SomethingDone>()
            .Subscribe((e) =>
            {
                Console.WriteLine("Something done: " + e.Bla);
            });
            bus.SubscribeTo <Renamed>()
            .Subscribe((e) =>
            {
                Console.WriteLine("Renamed: " + e.Name);
            });

            // complex event processing
            bus.SubscribeTo <IEvent>()
            .Buffer(2, 1)
            .Where(x =>
                   x.First() is SomethingDone &&
                   x.Last() is INameChangeEvent)
            .Subscribe((e) =>
            {
                Console.WriteLine("IMessage<IEvent>: Look, a new name after something done: " + (e.First() as SomethingDone).Bla + " -> " + (e.Last() as INameChangeEvent).Name);
            });

            bus.SubscribeTo <IEvent>()
            .Buffer(2, 1)
            .Where(x =>
                   x.First() is SomethingDone &&
                   x.Last() is INameChangeEvent)
            .Subscribe((e) =>
            {
                Console.WriteLine("IEvent: Look, a new name after something done: " + (e.First() as SomethingDone).Bla + " -> " + (e.Last() as INameChangeEvent).Name);
            });

            bus
            .SubscribeToAndUpdate <IMessage <TestAggregateRename>, TestAggregate>((aggr, cmd) =>
            {
                aggr.Rename(cmd.Body.Name);
            }, repo);

            bus.SubscribeTo <IMessage <TestAggregateDoSomething> >()
            .Select(command => Observable.FromAsync(() => Task.Run(async() =>
            {
                var aggregate = await repo.GetAsync <TestAggregate>(command.Body.Id);
                aggregate.DoSomething(command.Body.Foo);
                await repo.SaveAsync(aggregate);
            })))
            .Concat()
            .Subscribe()
            ;

            Console.WriteLine("Start executing...");

            var agg = new TestAggregate("abc" + Guid.NewGuid(), "test");

            agg.DoSomething("bla bla bla");

            agg.Rename("foo thing bar");

            agg.DoSomething("ha ha");

            agg.DoSomethingSpecial("<write poem>");

            agg.Rename("hu?");

            agg.DoSomething("hello?");

            agg.Rename("Hi!");


            await repo.SaveAsync(agg);

            agg = await repo.GetAsync <TestAggregate>(agg.Id);

            var projection  = TestState.LoadState(agg.StateModel);
            var projection2 = agg.StateModel;

            Console.WriteLine("Name: " + projection.Name + ", " + projection.SomethingDone);
            Console.WriteLine("Name: " + projection2.Name + ", " + projection2.SomethingDone);

            Console.WriteLine("Try to mess with state:");

            bus.Send(new TypedMessage <TestAggregateDoSomething>(Guid.NewGuid().ToString(), new TestAggregateDoSomething {
                Id = agg.Id, Foo = "Command DoSomething Bla"
            }, null, null, null, DateTime.UtcNow, 0));
            bus.Send(new TypedMessage <TestAggregateRename>(Guid.NewGuid().ToString(), new TestAggregateRename {
                Id = agg.Id, Name = "Command Renamed Name"
            }, null, null, null, DateTime.UtcNow, 0));

            agg = await repo.GetAsync <TestAggregate>(agg.Id);

            projection2 = agg.StateModel;

            Console.WriteLine("Name: " + projection2.Name);

            Console.WriteLine("-------");
            Console.WriteLine("Database Persistence");
            Console.WriteLine("-------");



            //var engine = new PersistenceEngine(sessionFactory, configuration, serializer);

            var observerFactory = new PollingObserverFactory(persistenceEngine, TimeSpan.FromMilliseconds(500));
            var observer        = await observerFactory.CreateObserverAsync(0);

            observer.Subscribe((s) =>
            {
                //Console.WriteLine("Polling: " + s.StreamName + "@" + s.StreamRevision + " - " + s.CheckpointNumber);
            });

            await observer.StartAsync();

            var repository = new EventRepository(
                new DefaultInstanceProvider(),
                persistenceEngine,
                new RawStreamEntryFactory());

            string entityId = null;

            Console.WriteLine("Generate 1000 entities");

            var list = new List <IEventSourcedEntity>();

            for (var i = 0; i < 1000; i++)
            {
                Console.Write(".");

                entityId = Guid.NewGuid().ToString();
                var entity = new TestAggregate(entityId, "test " + DateTime.Now.ToShortTimeString());

                entity.Rename("asdfasdf");
                entity.DoSomething("bla" + DateTime.Now.ToShortTimeString());

                list.Add(entity);
            }
            await repository.SaveAsync(list);

            list.Clear();

            var loadedEntity = await repository.GetAsync <TestAggregate>(entityId);

            Console.WriteLine("Commits: " + await persistenceEngine.LoadStreamEntriesAsync()
                              //.Result
                              .CountAsync());
            Console.WriteLine("Rename count: " + await persistenceEngine.LoadStreamEntriesAsync(payloadTypes: new[] { typeof(Renamed) })
                              //.Result
                              .CountAsync());

            Console.WriteLine("Rename checkpointnumbers of renames descending: " + string.Join(", ", await persistenceEngine
                                                                                               .LoadStreamEntriesAsync(ascending: false, payloadTypes: new[] { typeof(Renamed), typeof(SomethingDone) })
                                                                                               //.Result
                                                                                               .Select(x => "" + x.CheckpointNumber).ToArrayAsync()));
            Console.WriteLine("Rename count: " + await persistenceEngine.LoadStreamEntriesAsync(
                                  minCheckpointNumber: await persistenceEngine.GetCurrentEventStoreCheckpointNumberAsync() - 5,
                                  payloadTypes: new[] { typeof(Renamed) })

                              //.Result
                              .CountAsync());
            Console.WriteLine("Current CheckpointNumber: " + await persistenceEngine.GetCurrentEventStoreCheckpointNumberAsync()
                              //.Result
                              );

            var viewModelResetter   = new StorageResetter(nHibernateResetConfigurationProvider);
            var checkpointPersister = new CheckpointPersister <CheckpointInfo>(sessionFactory);

            //Console.ReadKey();

            var readRepository = new ReadRepository(sessionFactory);

            //return;

            /*
             * var live = new CatchUpProjector<TestState>(
             *  new TestState(),
             *  checkpointPersister,
             *  persistenceEngine,
             *  viewModelResetter,
             *  2000);
             *
             * var stopwatch = new Stopwatch();
             * stopwatch.Start();
             * live.Start();
             * stopwatch.Stop();
             * Console.WriteLine("live: " + stopwatch.ElapsedMilliseconds + "ms");
             *
             * var live2 = new CatchUpProjector<VowelCountState>(
             *  new VowelCountState(),
             *  new NullCheckpointPersister(),
             *  persistenceEngine,
             *  viewModelResetter,
             *  2000);
             * live2.Start();
             */
            var resetter = new StorageResetter(nHibernateResetConfigurationProvider);
            //resetter.Reset(new[] { typeof(PersistentEntity) });

            var persistentState = new CatchUpProjector <PersistentState>(
                new PersistentState(readRepository),
                checkpointPersister,
                persistenceEngine,
                viewModelResetter,
                observerFactory);

            var stopwatch = new Stopwatch();

            stopwatch.Start();
            await persistentState.StartAsync();

            _ = Task.Run(async() =>
            {
                while (true)
                {
                    Console.WriteLine(persistentState.StateModel.Count);
                    await Task.Delay(1000).ConfigureAwait(false);
                }
            });

            Console.ReadKey();
            stopwatch.Stop();
            Console.WriteLine($"persistent: {persistentState.StateModel.Count} msgs, {stopwatch.ElapsedMilliseconds}ms -> {persistentState.StateModel.Count / (stopwatch.ElapsedMilliseconds / 1000.0)}");
            observer.Dispose();

            /*
             * Console.WriteLine(live.StateModel.Name);
             * Console.WriteLine(live.StateModel.SomethingDone);
             * Console.WriteLine(live.StateModel.StreamName);
             *
             *
             * Console.WriteLine("a: " + live2.StateModel.ACount);
             * Console.WriteLine("e: " + live2.StateModel.ECount);
             * Console.WriteLine("i: " + live2.StateModel.ICount);
             * Console.WriteLine("o: " + live2.StateModel.OCount);
             * Console.WriteLine("u: " + live2.StateModel.UCount);
             */


            Console.ReadKey();
        }
Exemplo n.º 2
0
        private static async Task Main(string[] args)
        {
            var disposables = new List <IDisposable>();

            Console.WriteLine("Program started...");

            var binder     = new VersionedBinder();
            var serializer = new JsonNetSerializer(binder);

            var bus  = new ObservableMessageBus();
            var repo = new EventRepository(new DefaultInstanceProvider(), new WriteModel.InMemory.PersistenceEngine(serializer), new WriteModel.InMemory.RawStreamEntryFactory());

            // let bus subscribe to repository and publish its committed events
            repo.SubscribeTo <IMessage <IEvent> >()
            .Subscribe((e) => bus.Publish(e));

            // normal event processing
            bus.SubscribeTo <IMessage <IEvent> >().Subscribe((e) =>
            {
                Console.WriteLine("Look, an event: " + e.ToString());
            });

            bus.SubscribeTo <SomethingDone>()
            .Subscribe((e) =>
            {
                Console.WriteLine("Something done: " + e.Bla);
            });
            bus.SubscribeTo <Renamed>()
            .Subscribe((e) =>
            {
                Console.WriteLine("Renamed: " + e.Name);
            });

            // complex event processing
            bus.SubscribeTo <IEvent>()
            .Buffer(2, 1)
            .Where(x =>
                   x.First() is SomethingDone &&
                   x.Last() is INameChangeEvent)
            .Subscribe((e) =>
            {
                Console.WriteLine("IMessage<IEvent>: Look, a new name after something done: " + (e.First() as SomethingDone).Bla + " -> " + (e.Last() as INameChangeEvent).Name);
            });

            bus.SubscribeTo <IEvent>()
            .Buffer(2, 1)
            .Where(x =>
                   x.First() is SomethingDone &&
                   x.Last() is INameChangeEvent)
            .Subscribe((e) =>
            {
                Console.WriteLine("IEvent: Look, a new name after something done: " + (e.First() as SomethingDone).Bla + " -> " + (e.Last() as INameChangeEvent).Name);
            });

            bus
            .SubscribeToAndUpdate <IMessage <TestAggregateRename>, TestAggregate>((aggr, cmd) =>
            {
                aggr.Rename(cmd.Body.Name);
            }, repo);

            bus.SubscribeTo <IMessage <TestAggregateDoSomething> >()
            .Select(command => Observable.FromAsync(async() =>
            {
                var aggregate = await repo.GetAsync <TestAggregate>(command.Body.Id);
                aggregate.DoSomething(command.Body.Foo);
                await repo.SaveAsync(aggregate);
            }))
            .Concat()
            .Subscribe();

            Console.WriteLine("Start executing...");

            var agg = new TestAggregate("abc" + Guid.NewGuid(), "test");

            agg.DoSomething("bla bla bla");

            agg.Rename("foo thing bar");

            agg.DoSomething("ha ha");

            agg.DoSomethingSpecial("<write poem>");

            agg.Rename("hu?");

            agg.DoSomething("hello?");

            agg.Rename("Hi!");


            await repo.SaveAsync(agg);

            agg = await repo.GetAsync <TestAggregate>(agg.Id);

            var projection  = TestState.LoadState(agg.StateModel);
            var projection2 = agg.StateModel;

            Console.WriteLine("Name: " + projection.Name + ", " + projection.SomethingDone);
            Console.WriteLine("Name: " + projection2.Name + ", " + projection2.SomethingDone);

            Console.WriteLine("Try to mess with state:");

            bus.Send(new TypedMessage <TestAggregateDoSomething>(Guid.NewGuid().ToString(), new TestAggregateDoSomething {
                Id = agg.Id, Foo = "Command DoSomething Bla"
            }, null, null, null, DateTime.UtcNow, 0));
            bus.Send(new TypedMessage <TestAggregateRename>(Guid.NewGuid().ToString(), new TestAggregateRename {
                Id = agg.Id, Name = "Command Renamed Name"
            }, null, null, null, DateTime.UtcNow, 0));

            agg = await repo.GetAsync <TestAggregate>(agg.Id);

            projection2 = agg.StateModel;

            Console.WriteLine("Name: " + projection2.Name);

            // Console.WriteLine("Change-count: " + AlternateState.LoadState((AlernateState)null, agg.ev).ChangeCount);


            //SQLite3.Config(ConfigOption.Serialized);

            Console.WriteLine("-------");
            Console.WriteLine("Database Persistence");
            Console.WriteLine("-------");

            SQLiteConnectionWithLock connectionFactory()
            {
                if (writeConn != null)
                {
                    return(writeConn);
                }

                //SQLite3.Config(ConfigOption.Serialized);

                var databaseFile = "writeDatabase.db";

                var connectionString = new SQLiteConnectionString(databaseFile, SQLiteOpenFlags.Create | SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.FullMutex, true, null);

                writeConn = new SQLiteConnectionWithLock(connectionString);

                using (writeConn.Lock())
                {
                    writeConn.CreateCommand(@"PRAGMA synchronous = NORMAL;
PRAGMA journal_mode = WAL;", Array.Empty <object>()).ExecuteScalar <int>();
                }

                return(writeConn);
            }

            SQLiteConnectionWithLock readConnectionFactory()
            {
                if (readConn != null)
                {
                    return(readConn);
                }
                //SQLite3.Config(ConfigOption.Serialized);

                var databaseFile = "readDatabase.db";

                var connectionString = new SQLiteConnectionString(databaseFile, SQLiteOpenFlags.Create | SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.FullMutex, true, null);

                readConn = new SQLiteConnectionWithLock(connectionString);

                using (readConn.Lock())
                {
                    readConn.CreateCommand(@"PRAGMA synchronous = NORMAL;
PRAGMA temp_store = MEMORY;
PRAGMA page_size = 4096;
PRAGMA cache_size = 10000;
PRAGMA journal_mode = WAL;", Array.Empty <object>()).ExecuteScalar <int>();
                }

                return(readConn);
            }

            var engine = new PersistenceEngine(connectionFactory, serializer);

            engine.InitializeAsync().Wait();

            var observerFactory = new PollingObserverFactory(engine, TimeSpan.FromMilliseconds(500));
            var observer        = await observerFactory.CreateObserverAsync(0);

            var subscription = observer.Subscribe((s) =>
            {
                //Console.WriteLine("Polling: " + s.StreamName + "@" + s.StreamRevision + " - " + s.CheckpointNumber);
            });

            disposables.Add(subscription);
            disposables.Add(observer);

            await observer.StartAsync();

            var repository = new EventRepository(
                new DefaultInstanceProvider(),
                engine,
                new RawStreamEntryFactory());

            string entityId = null;

            Console.WriteLine("Generate 1000 entities");

            var list = new List <IEventSourcedEntity>();

            for (var i = 0; i < 1000; i++)
            {
                Console.Write(".");

                entityId = Guid.NewGuid().ToString();
                var entity = new TestAggregate(entityId, "test " + DateTime.Now.ToShortTimeString());

                entity.Rename("asdfasdf");
                entity.DoSomething("bla" + DateTime.Now.ToShortTimeString());

                list.Add(entity);
            }

            await repository.SaveAsync(list);

            list.Clear();


            var loadedEntity = await repository.GetAsync <TestAggregate>(entityId);

            var stopwatch = new Stopwatch();

            stopwatch.Start();
            var count = await engine.LoadStreamEntriesAsync().CountAsync();

            stopwatch.Stop();
            Console.WriteLine($"Load {count} entries: {stopwatch.ElapsedMilliseconds}ms");
            Console.ReadKey();

            Console.WriteLine("Commits: " + await engine.LoadStreamEntriesAsync()
                              //.Result
                              .CountAsync());
            Console.WriteLine("Rename count: " + await engine.LoadStreamEntriesAsync(payloadTypes: new[] { typeof(Renamed) })
                              //.Result
                              .CountAsync());

            Console.WriteLine("Rename checkpointnumbers of renames descending: " + string.Join(", ", await engine
                                                                                               .LoadStreamEntriesAsync(ascending: false, payloadTypes: new[] { typeof(Renamed), typeof(SomethingDone) })
                                                                                               //.Result
                                                                                               .Select(x => "" + x.CheckpointNumber).ToArrayAsync()));
            Console.WriteLine("Rename count: " + await engine.LoadStreamEntriesAsync(minCheckpointNumber: await engine.GetCurrentEventStoreCheckpointNumberAsync()
                                                                                     //.Result
                                                                                     - 5, payloadTypes: new[] { typeof(Renamed) })
                              //.Result
                              .CountAsync());
            Console.WriteLine("Current CheckpointNumber: " + await engine.GetCurrentEventStoreCheckpointNumberAsync()
                              //.Result
                              );

            var c = readConnectionFactory();

            //c.RunInTransactionAsync((SQLiteConnection connection) =>
            //{
            c.RunInLock((SQLiteConnection connection) =>
            {
                connection.CreateTable <CheckpointInfo>(CreateFlags.AllImplicit);
            });

            var viewModelResetter   = new StorageResetter(readConnectionFactory());
            var checkpointPersister = new CheckpointPersister <CheckpointInfo>(readConnectionFactory());

            //Console.ReadKey();

            var readRepository = new ReadRepository(readConnectionFactory);

            //return;

            /*
             * var live = new CatchUpProjector<TestState>(
             *  new TestState(),
             *  new NullCheckpointPersister(),
             *  engine,
             *  viewModelResetter);
             *
             * Stopwatch stopwatch = new Stopwatch();
             * stopwatch.Start();
             * live.Start();
             * stopwatch.Stop();
             * Console.WriteLine("live: " + stopwatch.ElapsedMilliseconds + "ms");
             *
             * var live2 = new CatchUpProjector<VowelCountState>(
             *  new VowelCountState(),
             *  new NullCheckpointPersister(),
             *  engine,
             *  viewModelResetter);
             * live2.Start();
             *
             * var resetter = new StorageResetter(readConnectionFactory());
             * //resetter.Reset(new[] { typeof(PersistentEntity) });
             */

            var persistentState = new CatchUpProjector <PersistentState>(
                new PersistentState(readRepository),
                checkpointPersister,
                engine,
                viewModelResetter,
                observerFactory);

            stopwatch.Start();

            await persistentState.StartAsync();

            _ = Task.Run(async() =>
            {
                while (true)
                {
                    Console.WriteLine(persistentState.StateModel.Count);
                    await Task.Delay(1000).ConfigureAwait(false);
                }
            });

            Console.ReadKey();
            stopwatch.Stop();
            Console.WriteLine($"persistent: {persistentState.StateModel.Count} msgs, {stopwatch.ElapsedMilliseconds}ms -> {persistentState.StateModel.Count / (stopwatch.ElapsedMilliseconds / 1000.0)}");

            /*
             * Console.ReadKey();
             * Console.WriteLine(live.StateModel.Name);
             * Console.WriteLine(live.StateModel.SomethingDone);
             * Console.WriteLine(live.StateModel.StreamName);
             *
             *
             * Console.WriteLine("a: " + live2.StateModel.ACount);
             * Console.WriteLine("e: " + live2.StateModel.ECount);
             * Console.WriteLine("i: " + live2.StateModel.ICount);
             * Console.WriteLine("o: " + live2.StateModel.OCount);
             * Console.WriteLine("u: " + live2.StateModel.UCount);
             */
            Console.ReadKey();

            foreach (var disp in disposables)
            {
                disp.Dispose();
            }
            observer.Dispose();
        }