Microservices meet Real-World Projects @ JavaLand

more info at https://www.innoq.com/de/talks/2016/03/javaland-2016-microservices-lessons-learned/

1. MicroServices meet Real World projects #javaland #innoQ www.innoQ.com
2. MicroServices meet Real World projects #javaland #innoQ www.innoQ.com
3. Alexander Heusingfeld alexander.heusingfeld@innoq.com Senior Consultant @ innoQ @goldstift Tammo van Lessen tammo.van-lessen@innoq.com Principal Consultant @ innoQ @taval
4. Architecture Consulting...
5. “We want to have a microservice architecture!”
6. “We want to have a microservice architecture!” — Every Customer, 2015
7. When reviewing a monolithic application … © innoQ/Roman Stranghöner
8. …and taking a look into the black box… © innoQ/Roman Stranghöner
9. …you’ll likely find it consists of multiple Bounded Contexts. © innoQ/Roman Stranghöner
10. If you cut a monolithic system along its very domains …
11. … and wrap every domain in a separate, replaceable web application …
12. … then that application can be build as a self-contained system (SCS).
13. http://scs-architecture.org/ more information on self-contained systems (SCS) can be found at #javaland #innoQ
14. Architectural Decisions
15. Architectural Decisions > Domain Architecture
16. Architectural Decisions > Domain Architecture > Micro Architecture
17. Architectural Decisions > Domain Architecture > Macro Architecture > Micro Architecture
18. Isn't there more than that…
19. At a project meeting…
20. Did you think about the people 
 who make your architecture exist?
21. us vs. them
22. “Don’t care about this, it’s our business!” “Alarming is our concern, don’t bother about it!” “No need for a discussion, we always fix that during deployment.” “That’s part of the handover to operations.”
23. overcome “us vs. them”
24. overcome “us vs. them” > cross-functional != cross-department
25. overcome “us vs. them” > cross-functional != cross-department > have one manager to decide on a team’s targets
26. overcome “us vs. them” > cross-functional != cross-department > have one manager to decide on a team’s targets > don’t neglect team-building
27. overcome “us vs. them” > cross-functional != cross-department > have one manager to decide on a team’s targets > don’t neglect team-building > trust is not optional
28. well-known pros are subjective
29. “Operating a monolith is easier!”
30. Of course it’s easier…
31. It’s always easier for you… …if the complexity is on someone else’s desk.
32. “Operational costs are increased!”
33. Monolith
34. Microservices?
35. Microservices? smaller components!
36. Microservices? smaller components! • easier to test • quicker to automate • faster roundtrips
37. “Separating teams duplicates work!”
38. The manageable, domain specific scope enables the development, operation and maintenance of an SCS by an autonomous team. Team 1 Team 2 Team 3
39. share ideas share concepts don’t share functional code Team 1 Team 2 Team 3
40. “Deployments cannot be faster, 
 we have an established process!”
44. What this taught us
45. What this taught us > enable fast feedback for your team
46. What this taught us > enable fast feedback for your team > automate what’s next to you first
47. What this taught us > enable fast feedback for your team > automate what’s next to you first > do your homework before you teach others
48. What this taught us > enable fast feedback for your team > automate what’s next to you first > do your homework before you teach others > other people will notice the benefits
49. What this taught us > enable fast feedback for your team > automate what’s next to you first > do your homework before you teach others > other people will notice the benefits > complex processes can be adopted, divide them and take one step at a time
50. summarized: change perspectives!
53. http://izismile.com/2013/01/22/buyers_beware_its_a_matter_of_perspective_3_pics.html
54. A company which embraced and evolved
55. http://projectcartoon.com/cartoon/1
56. Summary #javaland #innoQ
57. Summary > distributed systems are hard - organizational impact, too #javaland #innoQ
58. Summary > distributed systems are hard - organizational impact, too > don't forget: there's always at least one other perspective #javaland #innoQ
59. Summary > distributed systems are hard - organizational impact, too > don't forget: there's always at least one other perspective > Don’t overwhelm people, change one thing at a time #javaland #innoQ
60. Summary > distributed systems are hard - organizational impact, too > don't forget: there's always at least one other perspective > Don’t overwhelm people, change one thing at a time > not everyone who wants microservices is immediately capable to establish them #javaland #innoQ
61. Tammo van Lessen | @taval tammo.vanlessen@innoq.com Alexander Heusingfeld | @goldstift alexander.heusingfeld@innoq.com Thank you! Questions?
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