Wenn Schnittstellen alt werden... (JFS 2017)

Folien zum Vortrag auf dem Java Forum Stuttgart 2017

Transcript

1. Wenn Schnittstellen alt werden... Claus Straube IT­Architekt claus.straube@muenchen.de
2. A B Provider Consumer API API
3. A B Provider Consumer Request Response API API
4. A B Provider Consumer Request Response API API Payload
5. A B Provider Consumer Request Response API API Payload
6. A B Provider Consumer Request Response API API Payload
7. A B Provider Consumer Request Response API API Payload
8. A B Provider Consumer Request Response API API Payload
9. A B Provider Consumer Request Response API Payload API
10. A B Provider Consumer Request Response API Payload API
11. A B Provider Consumer Request Response API Payload API
12. A B Provider Consumer Request Response API API B kennt die Payload Struktur von A B kennt A B kennt die API Struktur von A
13. System B muss ziemlich viel von System A kennen, damit die Kommunikation funktioniert!
14. A B Provider Consumer Request Response API API Payload WARUM???
15. A B Provider Consumer Request Response API API Payload
16. Evolution
17. Evolution 2.0
19. Technical Dept
20. A B Provider Consumer Request Response API API Payload
21. A B Provider Consumer Request Response API API B kennt die Payload Struktur von A B kennt A B kennt die API Struktur von A
22. A B Provider Consumer Request Response API API B kennt die API Struktur von A
23. RestBucks, the sample http://codebetter.com/glennblock/2011/06/06/rest­in­practice­the­book­restbucks­the­sample https://github.com/olivergierke/spring­restbucks https://speakerdeck.com/olivergierke http://olivergierke.de/2016/04/benefits­of­hypermedia/
24. https:// RESTBUCKS.io v1 create order / / _
25. https:// RESTBUCKS.io/v2 create order / _
26. https:// RESTBUCKS.io v2 order id / / /{ } POST = create order PATCH = update order DELETE = delete order GET = read order
29. Kunde Barista Hi Hallole
30. order update order pay order cancel order prepare order Schritt 1 Schritt 2 Schritt 3
31. completed Schritt 4 Schritt 5 drink
32. Hateoas Hypermedia As The Engine Of Application State
33. order Schritt 1 Request Response POST: RESTBUCKS.io/v2/order self GET: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} update_order POST/PATCH: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} cancel_order DELETE: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} pay_order PUT: RESTBUCKS.io/v2/order/1/payment RESTBUCKS.io/v2/order/{id}/payment
34. order Schritt 1 Request Response POST: RESTBUCKS.io/v2/order self GET: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} update_order POST/PATCH: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} cancel_order DELETE: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} pay_order PUT: RESTBUCKS.io/v2/order/1/payment RESTBUCKS.io/v2/order/{id}/payment
35. update order Schritt 2 Request Response PATCH: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id}
36. update order Schritt 2 Request Response PATCH: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} self GET: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} update_order POST/PATCH: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} cancel_order DELETE: RESTBUCKS.io/v2/order/1 RESTBUCKS.io/v2/order/{id} pay_order PUT: RESTBUCKS.io/v2/order/1/payment RESTBUCKS.io/v2/order/{id}/payment
37. A B Provider Consumer Request Response API API B kennt die Payload Struktur von A B kennt A B kennt die API Struktur von A
38. A B Provider Consumer Request Response API API B kennt A
39. A B Provider Consumer Request Response API API B kennt A
40. Message Broker A B Provider Consumer API API
41. A B Provider Consumer API API Message Broker ?
42. order update order pay order cancel order prepare order Schritt 1 Schritt 2 Schritt 3
43. order event update order event pay order event cancel order event prepare order event Schritt 1 Schritt 2 Schritt 3
44. A B Provider Consumer API API Message Broker FooEvent Topic BarEvent Topic SomeEvent Topic FooEvent­Listener SomeEvent­Listener BarEvent­Listener SomeEvent­Listener
45. A B Provider Consumer Request Response API API B kennt die Payload Struktur von A B kennt A B kennt die API Struktur von A
46. Provider Consumer Request Response A API B kennt die Payload Struktur von A B API
47. 1 Kaffee ohne Milch 2 Kaffee mit Milch
48. 1 Kaffee ohne Milch 2 Kaffee mit Milch Order LineItem
49. Order LineItem Name : String Quantity : int Milk : Boolean Size : Size 1 1..*
50. Schema Evolution
53. Writer Reader
54. Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 Writer
55. Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 Writer Reader
56. [ { "namespace": "de.muenchen.jfs17", "type": "record", "name": "LineItem", "fields": [ {"name": "name", "type": "string", "default": "coffee"}, {"name": "quantity", "type": "int", "default": "1"}, {"name": "milk", "type": "boolean", "default": "false"} ] }, { "namespace": "de.muenchen.jfs17", "type": "record", "name": "Order", "fields": [ {"name": "item", "type": "LineItem"} ] } ] Version 1.0
57. [ { "namespace": "de.muenchen.jfs17", "type": "record", "name": "LineItem", "fields": [ {"name": "name", "type": "string", "default": "coffee"}, {"name": "quantity", "type": "int", "default": "1"}, {"name": "milk", "type": "boolean", "default": "false"} ] }, { "namespace": "de.muenchen.jfs17", "type": "record", "name": "Order", "fields": [ {"name": "item", "type": "LineItem"} ] } ] LineItem Type Version 1.0
58. [ { "namespace": "de.muenchen.jfs17", "type": "record", "name": "LineItem", "fields": [ {"name": "name", "type": "string", "default": "coffee"}, {"name": "quantity", "type": "int", "default": "1"}, {"name": "milk", "type": "boolean", "default": "false"} ] }, { "namespace": "de.muenchen.jfs17", "type": "record", "name": "Order", "fields": [ {"name": "item", "type": "LineItem"} ] } ] Order Type Version 1.0
59. Servus Hallole
60. Order Schema {JSON} V2.0 Order Schema {JSON} V2.0 Writer
61. Order Schema {JSON} V2.0 Order Schema {JSON} V2.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 Reader Writer
62. Neu Neu Alt Alt Reader Writer Vorwärtskompatibilität
63. Alt Alt Neu Neu Reader Writer Rückwärtskompatibilität
64. [ { "namespace": "de.muenchen.jfs17", "type": "enum", "name": "Sizes", "symbols": ["LARGE", "MIDDLE", "SMALL"] }, { "namespace": "de.muenchen.jfs17", "type": "record", "name": "RechnungsPosten", "aliases": ["LineItem"], "fields": [ {"name": "name", "type": "string", "default": "coffee"}, {"name": "quantity", "type": "int", "default": "1"}, {"name": "milk", "type": "boolean", "default": "false"}, {"name": "size", "type": "Sizes", "default": "MIDDLE"} ] }, { "namespace": "de.muenchen.jfs17", "type": "record", "name": "Bestellung", "aliases": ["Order"], "fields": [ Version 2.0
65. 1 gr. Kaffee ohne Milch 2 kl. Kaffee mit Milch Schema Server Order Schema {JSON} V2.0 Order Schema {JSON} V2.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0
66. Schema Server Order Schema {JSON} V2.0 Order Schema {JSON} V2.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 Message Broker OrderEvent Topic A Message Converter B Message Converter
67. Schema Server Order Schema {JSON} V2.0 Order Schema {JSON} V2.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 A B Message Broker Message Converter Message Converter GET /{subject}/{format} GET /{subject}/{format} OrderEvent Topic
68. Schema Server Order Schema {JSON} V2.0 Order Schema {JSON} V2.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 A B Message Broker Message Converter Message Converter GET /{subject}/{format} GET /{subject}/{format} OrderEvent Topic Avro Message Avro Message
69. Schema Server Order Schema {JSON} V2.0 Order Schema {JSON} V2.0 Order Schema {JSON} V1.0 Order Schema {JSON} V1.0 A B Message Broker Message Converter Message Converter GET /{subject}/{format} GET /{subject}/{format} OrderEvent Topic Avro Message Avro Message https://cloud.spring.io/spring­cloud­stream/
71. DEMO https://github.com/xdoo/schema_evolution_demo
72. https://speakerdeck.com/xdoo
73. Claus Straube Landeshauptstadt München it@M Agnes­Pockels­Bogen 21 80992 München claus.straube@muenchen.de @clausstraube Herzlichen Dank Für die Aufmerksamheit!