Beyond DDD: uno sguardo a CQRS e event sourcing
•Télécharger en tant que PPTX, PDF•
1 j'aime•661 vues
![about me
{
"firstName": "Alessandro",
"lastName": "Melchiori",
"role": "software architect @ codiceplastico",
"contacts": [
{ "type": "email", "value": alessandro@codiceplastico.com },
{ "type": "twitter", "value": "@amelchiori" },
{ "type": "blog", "value": http://blog.codiceplastico.com/melkio }
]
}](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommandé
Recommandé
Contenu connexe
Similaire à Beyond DDD: uno sguardo a CQRS e event sourcing
Similaire à Beyond DDD: uno sguardo a CQRS e event sourcing (20)
Plus de Alessandro Melchiori
Plus de Alessandro Melchiori (20)
Dernier
Dernier (20)
Beyond DDD: uno sguardo a CQRS e event sourcing
- 1. Beyond DDD: uno sguardo a CQRS and event sourcing
- 2. about me { "firstName": "Alessandro", "lastName": "Melchiori", "role": "software architect @ codiceplastico", "contacts": [ { "type": "email", "value": alessandro@codiceplastico.com }, { "type": "twitter", "value": "@amelchiori" }, { "type": "blog", "value": http://blog.codiceplastico.com/melkio } ] }
- 3. Il contesto • Applicazione finanziaria (non “always online”) • Circa 70 utenti • 250.000+ aziende • 750.000+ bilanci • 70.000.000+ voci di bilancio • 16.000+ call/mese • “Pluggato” a servizi di terze parti • Picchi di lavoro “temporali” (…la nuvola può darci una mano)
- 4. Agenda • Com’era • Com’è • Come sarà
- 5. Presentation Layer Come era… Service/Application Layer Domain Model Storage
- 6. Come era…
- 7. Come era…
- 8. Come era…
- 9. I problemi… • Logica (mal) sparpagliata • Contesti non definiti • Modello “fragile” e poco propenso alle evoluzioni • Un unico modello per la lettura e per la scrittura • Prestazioni • UI “generazionalista”
- 10. DDD: brevi cenni • Use AGGREGATES as unit of consistency across your domain model • Protect your model with clearly defined BOUNDED CONTEXT (Eric Evans) BC 01 BC 02 BC 03
- 11. DDD: brevi cenni • It’s really become clear to me in the last couple of years that we need a new building block and that is the Domain Events (Eric Evans) BC 01 BC 02 BC 03
- 12. CQRS / ES: brevi cenni • Every method should either be a command that performs an action, or a query that returns data to the caller, but NOT BOTH (Bertrand Meyer)
- 13. CQRS / ES: brevi cenni • A single model cannot be appropriate for reporting, searching and transactional behavior • State transition are an important part of our problem space and should be modeled within our domain (Greg Young, 2008)
- 14. L’evoluzione
- 15. Presentation Layer Come è… Service Layer Read storage Domain Model Write storage
- 16. Come sarà… Worker / Web Role Service Bus ACS AZURE ? Blob Storage MongoDb (PaaS or SaaS)
- 17. Quando DDD/CQRS/ES fanno per me? Chiedilo al «tuo» UBIQUITOUS LANGUAGE (Alessandro Melchiori)
- 18. Quando DDD/CQRS/ES fanno per me? Tackling Complexity in the Heart of Software