The document discusses a Java client library for interacting with Cloud Foundry APIs. It begins with an introduction to new Java 8 features like lambdas and streams that are relevant to the client. It then covers Project Reactor, a library for reactive programming. The bulk of the document demonstrates how to use the client library to interact with the Cloud Foundry UAA, API, and Firehose through global configuration objects, client interfaces, and examples.

1. CLOUD FOUNDRY JAVA CLIENT FOR FUN AND PROFIT†
Josh Ghiloni
jghiloni@ecsteam.com
@joshghiloni
†Fun and Profit Not Guaranteed
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3. ABOUT ECS TEAM
Technology consulting company with headquarters in Denver, CO
Founded in 1999
Completed 40+ cloud native development engagements since 2014
Bronze Sponsor, CF Summit
Silver Member, CF Foundation
Sponsor, Colorado CF Meetup
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4. AGENDA
1. What's new in Java 8?
2. Introduction to Project Reactor
3. Interacting with the UAA
4. Interacting with the Cloud Foundry API
5. Interacting with the Firehose
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5. WHAT'S NEW IN JAVA 8?
4 . 1

6. WHAT'S NEW IN JAVA 8?
FUNCTIONAL INTERFACES
public interface Function<T, R> {
R apply(T input);
}
4 . 2

7. WHAT'S NEW IN JAVA 8?
STREAMS
public <T> Stream<T> of(T... items) {
return Arrays.stream(items);
}
4 . 3

8. WHAT'S NEW IN JAVA 8?
4 . 4

9. WHAT'S NEW IN JAVA 8?
LAMBDAS
public List<Integer> squaredIntegers(Integer... ints) {
return Arrays.stream(ints).map((i) -> i * i).collect(Collectors.toList());
}
public List<Integer> positiveIntegers(Integer... ints) {
return Arrays.stream(ints).filter((i) -> i > 0).collect(Collectors.toList());
}
4 . 5

10. INTRODUCTION TO PROJECT
REACTOR
5 . 1

11. INTRODUCTION TO PROJECT REACTOR
Non-blocking API
Compatible with Standard Java Features
Typed sequences
Publisher - Reactive Standard (used for 0 .. N items)
Mono - Used for 0 .. 1 items
Flux - Used for N items
5 . 2

12. INTERACTING WITH THE CLOUD FOUNDRY API
Two global components:
ConnectionContext - Info about foundation
TokenProvider - Authentication information
6 . 1

13. INTERACTING WITH THE CLOUD FOUNDRY API
Client interface:
ConnectionContext - Info about foundation
TokenProvider - Authentication information
UaaClient - Work with the Cloud Foundry UAA
6 . 2

14. INTERACTING WITH THE CLOUD FOUNDRY API
DEMO!
6 . 3

15. INTERACTING WITH THE CLOUD FOUNDRY API
Client interface:
ConnectionContext - Info about foundation
TokenProvider - Authentication information
UaaClient - Work with the Cloud Foundry UAA
CloudFoundryClient - Work with the Cloud Foundry REST API
6 . 4

16. INTERACTING WITH THE CLOUD FOUNDRY API
DEMO!
6 . 5

17. INTERACTING WITH THE CLOUD FOUNDRY API
Client interface:
ConnectionContext - Info about foundation
TokenProvider - Authentication information
UaaClient - Work with the Cloud Foundry UAA
CloudFoundryClient - Work with the Cloud Foundry REST API
DopplerClient - Work with the Cloud Foundry Firehose
6 . 6

18. INTERACTING WITH THE CLOUD FOUNDRY API
DEMO!
6 . 7

19. THANKS!
ANY QUESTIONS?
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