LIDNUG : Reliable applications with messaging

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Within a system, components communicate with each other through methods, services, etc. But what to do when a database connection times out, or the famous NullReference exception occurs? We log the error, but how do we offer call again to our system? Can we do this automated? During this session you’ll learn how to use messaging to solve the mentioned issues. How you can build more reliable, measurable and more robust software. You’ll also learn how to do this with both WCF and NServiceBus.

Technologie

Dennis van der Stelt
and building reliable systems
Dennis van der Stelt
Software Architect
http://dennis.bloggingabout.net/
dennis@bloggingabout.net
NServiceBus Community Champ
MESSAGING
@dvdstelt
#lidnug

Dennis van der Stelt
Separation of concerns
Flexibility & Reusability
Scalability
why all the layers?

Dennis van der Stelt
A monolithic design is characterized by such tight coupling
among modules that they really have no independent existence.
monolithic

Dennis van der Stelt
COUPLING
Which layer has the
worst coupling?

Dennis van der Stelt
MONOLITHIC DESIGN
How does my clean code become a big ball of mud?
Database

Dennis van der Stelt
SpatialTemporalPlatform
coupling aspects

Dennis van der Stelt
PLATFORM
Also known as ‘interoperability’
http, json, xml, xsd, etc…

Dennis van der Stelt
TEMPORAL
Store Front End Shipping Service

Dennis van der Stelt
TEMPORAL
Store Front End Shipping ServiceShipping Service

Dennis van der Stelt
TEMPORAL
Store Front End Shipping ServiceOrder Queue

Dennis van der Stelt
SPATIAL .net
application
.net application
ShipOrder AssignTask

Dennis van der Stelt
Messaging
 Reduces spatial coupling
 XML/JSON for platform coupling
 Asynchronous for temporal coupling

Dennis van der Stelt
PERFORMANCE
RPC versus Messaging

Dennis van der Stelt
TEMPORAL COUPLING
Synchronouscommunication
Order accepted
DoesCompanyHaveCredit(companyId)
Place new order
Company

Dennis van der Stelt
TEMPORAL COUPLING
Asynchronous communication
Order accepted
DoesCompanyHaveCredit(companyId)
Place new order
GotData?
GotData?
GotData?
:)

Dennis van der Stelt
TEMPORAL COUPLING
Event Driven Communication
Order accepted
Publish CompanyHasCredit status
Place new order
Store data

Dennis van der Stelt
true loose coupling
retries / no data loss
smaller transactions
simplification of structure
improved manageability

Dennis van der Stelt
Warehouse Service
Sales Service
Product Service
Ordering
Products
Shipping
CQRS & Event Sourcing
CRUD
3 Tier
ARCHITECTURAL STYLES

Dennis van der Stelt
find me.
http://dennis.bloggingabout.net
dvdstelt@outlook.com

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LIDNUG : Reliable applications with messaging

1. Dennis van der Stelt and building reliable systems Dennis van der Stelt Software Architect http://dennis.bloggingabout.net/ dennis@bloggingabout.net NServiceBus Community Champ MESSAGING @dvdstelt #lidnug

2. Dennis van der Stelt AGENDA

3. Dennis van der Stelt

4. Dennis van der Stelt Separation of concerns Flexibility & Reusability Scalability why all the layers?

5. Dennis van der Stelt A monolithic design is characterized by such tight coupling among modules that they really have no independent existence. monolithic

6. Dennis van der Stelt COUPLING Which layer has the worst coupling?

7. Dennis van der Stelt

8. Dennis van der Stelt MONOLITHIC DESIGN How does my clean code become a big ball of mud? Database

9. Dennis van der Stelt MONOLITHIC DESIGN How does my clean code become a big ball of mud? Database

10. reduce coupling

11. Dennis van der Stelt SpatialTemporalPlatform coupling aspects

12. Dennis van der Stelt PLATFORM Also known as ‘interoperability’ http, json, xml, xsd, etc…

13. Dennis van der Stelt TEMPORAL Store Front End Shipping Service

14. Dennis van der Stelt TEMPORAL Store Front End Shipping ServiceShipping Service

15. Dennis van der Stelt TEMPORAL Store Front End Shipping ServiceOrder Queue

16. Dennis van der Stelt TEMPORAL Store Front End Shipping ServiceOrder Queue

17. Dennis van der Stelt TEMPORAL Store Front End Shipping ServiceOrder Queue

18. Dennis van der Stelt SPATIAL

19. Dennis van der Stelt SPATIAL .net application .net application ShipOrder AssignTask

20. Dennis van der Stelt Messaging  Reduces spatial coupling  XML/JSON for platform coupling  Asynchronous for temporal coupling

21. demo Messaging using WCF

22. Dennis van der Stelt PERFORMANCE RPC versus Messaging

23.

24.

25. what is the best pizza?

26. Dennis van der Stelt TEMPORAL COUPLING Synchronouscommunication Order accepted DoesCompanyHaveCredit(companyId) Place new order Company

27. Dennis van der Stelt TEMPORAL COUPLING Asynchronous communication Order accepted DoesCompanyHaveCredit(companyId) Place new order GotData? GotData? GotData? :)

28. Dennis van der Stelt TEMPORAL COUPLING Event Driven Communication Order accepted Publish CompanyHasCredit status Place new order Store data

29. demo NServiceBus Demo

30. Dennis van der Stelt true loose coupling retries / no data loss smaller transactions simplification of structure improved manageability

31. Dennis van der Stelt Warehouse Service Sales Service Product Service Ordering Products Shipping CQRS & Event Sourcing CRUD 3 Tier ARCHITECTURAL STYLES

32. messaging is business agility

33. Dennis van der Stelt find me. http://dennis.bloggingabout.net dvdstelt@outlook.com

LIDNUG : Reliable applications with messaging

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