Enterprise software schaalbaar maken met Service Fabric hoe AFAS zijn next gen ERP platform ontwikkelt

360+ medewerkers (4 locaties) 10.000 klanten (bedrijven) 1.500.000 gebruikers 80 miljoen euro omzet (2014) AFAS Software

AFAS Profit Maandelijks 1.500.000 loonstroken HRM, CRM, financieel, order management, project management, workflow, ...

AFAS Online 1780 cores, 25 TB RAM, 180 TB SSD storage 10.000 concurrent RDP gebruikers 200.000 unieke gebruikers per maand 1.500.000 API calls per dag

Software kun je definiëren in plaats van programmeren.

Modelleer het bedrijf met zijn processen

Sla het model op in een definitie

Lees de definitie in een generator

Lever de resulterende applicatie uit

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client command-systeem query-systeem event bus

Command public class CreateArticleCommand : Command { public Guid ArticleId { get; set; } public string Description { get; set; } public decimal Price { get; set; } } Event public class ArticleCreatedEvent : Event { public Guid ArticleId { get; set; } public string Description { get; set; } public decimal Price { get; set; } } Query public class GetArticleQuery : Query { public Guid ArticleId { get; set; } }

client query-systeem event bus command-systeem

AggregateRoot - Handle public void Handle(CreateArticleCommand command) { if(command.Price <= 0) { throw new CommandValidationException("Price should be greater than 0."); } if(string.IsNullOrEmpty(command.Description) || command.Description.Length > 20) { throw new CommandValidationException("Description is mandatory, " + "and cannot be longer than 20 characters."); } RaiseEvent(new ArticleCreatedEvent(command.ArticleId, command.Description, command.Price)); } AggregateRoot - Apply private void Apply(ArticleCreatedEvent @event) { _saleable = true; _price = @event.Price; }

client query-systeem event bus

CommandHandler private void Handle(CreateArticleCommand command) { Repository.ExecuteOn(command.ArticleId, command); } AggregateRootRepository - InMemory public virtual async Task ExecuteOn(Guid aggregateId, Command command) where T: AggregateRoot { T aggregateRoot = LoadAggregateRoot(aggregateId); aggregateRoot.Handle(command); await SaveAndDispatchEvents(aggregateRoot); }

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“Actors are isolated, single-threaded components that encapsulate both state and behavior.”

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service systeem reliable collections communicatie actors service API service systeem reliable collections communicatie service API

client query-systeem event bus

AggregateRootRepository - InMemory public virtual async Task ExecuteOn(Guid aggregateId, Command command) where T: AggregateRoot { T aggregateRoot = LoadAggregateRoot(aggregateId); aggregateRoot.Handle(command); await SaveAndDispatchEvents(aggregateRoot); } AggregateRootRepository – Service Fabric public override async Task ExecuteOn(Guid aggregateId, Command command) { var actor = ActorProxy.Create(new ActorId(aggregateId), "App"); await actor.ExecuteOn(typeof(T).AssemblyQualifiedName, command.ToJson()); }

AggregateRootActor public async Task ExecuteOn(string aggregateRootType, string commandJson) { var aggregateRoot = LoadAggregateRoot(aggregateRootType); var command = Deserialize(commandJson); aggregateRoot.Handle(command); await SaveAndDispatchEvents(aggregateRoot); }

één Stateless Actor Type Range partitions voor load balancing Actor Id is het Id van de AggregateRoot

client command-systeem event bus query-systeem

QueryModelBuilder private void Handle(ArticleCreatedEvent @event) { Repository.Add(@event.ArticleId, new JObject( new JProperty("Article", @event.ArticleId), new JProperty("Description", @event.Description), new JProperty("Price", @event.Price))); } QueryHandler private JObject Handle(GetArticleQuery query) { return Repository.Get(query.ArticleId); }

client command-systeem event bus

client command-systeem event bus

QueryModelBuilder Service public async Task Handle(string eventJson) { var queue = await StateManager.GetOrAddAsync>("qmbQueue"); using(ITransaction tx = StateManager.CreateTransaction()) { await queue.EnqueueAsync(tx, eventJson); await tx.CommitAsync(); } }

QueryModelBuilder Service protected override async Task RunAsync(CancellationToken cancellationToken) { var queue = await StateManager.GetOrAddAsync>("qmbQueue"); while(true) { using(ITransaction tx = StateManager.CreateTransaction()) { ConditionalResult dequeueReply = await queue.TryDequeueAsync(tx); if(dequeueReply.HasValue) { string message = dequeueReply.Value; _queryModelBuilder.Handle(Deserialize(message)); await tx.CommitAsync(); } } } }

één Stateful Service Type Named partitions voor load balancing Partition name is het type van de QueryModelBuilder

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Voor vragen, discussie etc: m.overeem@afas.nl - @michielovereem - https://linkedin.com/in/movereem CQRS + Service Fabric • Sluit ontzettend goed aan bij onze architectuur. • Betrouwbaarheid, schaalbaarheid en onderhoudsgemak. • Portable cloud hosting is mogelijk. https://github.com/AFASSoftware/CQRS-Microservices