Distributed Systems Design

As presented at Blaak Selectie meeting

Transcript

1. Dennis van der Stelt brains might melt… mine did! Dennis van der Stelt Software Architect http://dennis.bloggingabout.net/ dennis@bloggingabout.net NServiceBus Community Champ DISTRIBUTED SYSTEMS DESIGN @dvdstelt #blaak
2. Dennis van der Stelt slide heb ik er zelf tussen gezet voor kudos richting mark & sandra! ;-)
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4. Dennis van der Stelt AGENDA
5. Dennis van der Stelt “You know nothing, Jon Snow”
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8. Dennis van der Stelt 8 fallacies distributed computing Deutsch Gosling
9. Dennis van der Stelt 11 fallacies distributed computing Neward
10. Dennis van der Stelt Separation of concerns Flexibility & Reusability Scalability why all the layers?
11. Dennis van der Stelt A monolithic design is characterized by such tight coupling among modules that they really have no independent existence. monolithic
12. question Which layer has the worst coupling?
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14. reduce coupling
15. Dennis van der Stelt Spatial Temporal Platform coupling aspects
16. Dennis van der Stelt PLATFORM Also known as ‘interoperability’ http, json, xml, xsd, etc…
17. Dennis van der Stelt TEMPORAL Store Front End Shipping Service
18. Dennis van der Stelt TEMPORAL Store Front End Shipping Service Shipping Service
19. Dennis van der Stelt TEMPORAL Store Front End Shipping Service Order Queue
20. Dennis van der Stelt TEMPORAL Store Front End Shipping Service Order Queue
21. Dennis van der Stelt TEMPORAL Store Front End Shipping Service Order Queue
22. Dennis van der Stelt SPATIAL
23. Dennis van der Stelt SPATIAL .net application .net application ShipOrder AssignTask
24. Dennis van der Stelt Messaging  Reduces spatial coupling  XML for platform coupling  Asynchronous for temporal coupling
25. demo Messaging
26. Dennis van der Stelt PERFORMANCE RPC versus Messaging
27. Dennis van der Stelt service oriented architecture
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32. Dennis van der Stelt of service orientation  Tenets boundaries are explicit services are autonomous share schema & contract, not class & type compatibility is based on policy
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35. Dennis van der Stelt SERVICE ORIENTATION AT RUNTIME
38. Dennis van der Stelt Don’t do request/reply
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40. Dennis van der Stelt Don’t do request/reply
41. Dennis van der Stelt publish events
42. Dennis van der Stelt PUBLISH EVENTS Subscribe invoice updates Unpaid Invoices Subscribe to customer status updates Customer Disabled Save event status locally Save event status locally Retrieve companies
43. what is the best pizza?
44. Dennis van der Stelt TEMPORAL COUPLING Synchronous communication Order accepted DoesCompanyHaveCredit(companyId) Place new order Company
45. Dennis van der Stelt TEMPORAL COUPLING Asynchronous communication Order accepted DoesCompanyHaveCredit(companyId) Place new order GotData? GotData? GotData? :)
46. Dennis van der Stelt TEMPORAL COUPLING Event Driven Communication Order accepted Publish CompanyHasCredit status Place new order Store data
47. Dennis van der Stelt A service is the technical authority of a specific business capability
48. Dennis van der Stelt SOA & EDA
49. Dennis van der Stelt the ui is more than meets the eye
50. Dennis van der Stelt WHO OWNS THIS SCREEN?
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55. Dennis van der Stelt Now that is a tasty idea
56. Dennis van der Stelt WTF?
57. Dennis van der Stelt Business Component Business Component Service
58. Dennis van der Stelt Warehouse Service Sales Service Product Service Ordering Products Shipping regular customer strategic customer
59. Dennis van der Stelt Warehouse Service Product Service Products Shipping Sales Service Ordering regular customer strategic customer
60. Dennis van der Stelt Warehouse Service Product Service Products Shipping Sales Service Ordering Strategic Customers Regular Customers regular customer strategic customer ?
61. Dennis van der Stelt Warehouse Service Product Service Products Shipping Sales Service Ordering Strategic Customers Regular Customers regular customer strategic customer subscribe
62. Dennis van der Stelt Warehouse Service Product Service Products Shipping Sales Service Ordering Strategic Customers Regular Customers regular customer strategic customer publish
63. Dennis van der Stelt Warehouse Service Product Service Products Shipping Sales Service Ordering regular customer strategic customer
64. Dennis van der Stelt Warehouse Service Sales Service Product Service Ordering Products Shipping CQRS & Event Sourcing CRUD 3 Tier ARCHITECTURAL STYLES
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66. Dennis van der Stelt A service is the technical authority of a specific business capability If you share data over services you likely have your boundaries wrong
67. race conditions do not exist
68. Dennis van der Stelt system that never goes down
69. Dennis van der Stelt juniors building to scale
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71. SOA is business agility
72. Dennis van der Stelt find me. http://dennis.bloggingabout.net dvdstelt@outlook.com