Robert Dickerson, Software Developer, IBM-Swift, @rfdickerson Of course its allowed - just matters how you do it. In this part of the workshop we’ll start with serverless: New cloud programming models enabled by serverless architectures are emerging, allowing developers to focus more sharply on creating their applications and less on managing their infrastructure. The OpenWhisk project started by IBM and now part of Apache provides an open source platform to enable these cloud native, event-driven applications. In this talk, we will provide an overview of serverless architectures, introduce the OpenWhisk programming model, and then show how to deploy an OpenWhisk application on IBM Bluemix OpenWhisk. Then we’ll get Swift! It’s not only a language you turn to to build your iOS application, but it can also be the language you can use to build your backend. This part of the workshop will use a text-based adventure game called "GameOn" as an example for building a Server-side Swift App. Topics include: • How to create a web service using the IBM Kitura web framework • How to integrate the Watson SDK for Swift into your application • How to dockerize your Swift application and deploy it to Bluemix

1. Swift on the Server
Robert F. Dickerson
Devoxx US, March 2017

2. @rfdickerson
Swift Programming
Language
Strong types
Static types
Automatic Reference Counting
Optionals
Algebraic Data types
Closures

3. @rfdickerson
Swift language growth
RedMonk rating: 11

4. @rfdickerson
Why Swift on the Server?

5. @rfdickerson
Performant Applications
Duration(s)lowerisbetter
0
33.5
67
100.5
134
Swift Java NodeJS Ruby
134.2
15.84.34

6. @rfdickerson
Low Memory
Duration(s)lowerisbetter
0.00
15.00
30.00
45.00
60.00
Swift Java NodeJS Ruby
54.6
25.3
32.2
15

7. @rfdickerson
Swift is ideal for Cloud

8. @rfdickerson
Isomorphic Development
mobile
backend

9. @rfdickerson
Use familiar libraries

10. @rfdickerson
Server-side Swift Frameworks
KituraVaporPerfect Zewo
kitura.io
http://www.zewo.io/
www.vapor.io

11. @rfdickerson
Routing with Kitura
router.get("/hello") { request, response,
callNextHandler in
response.status(.OK).send("Hello, World!")
callNextHandler()
}

12. @rfdickerson
FROM ibmcom/swift-ubuntu-runtime:latest
LABEL Description=""
EXPOSE 8080
WORKDIR $HOME
COPY . $HOME
RUN swift build —configuration release
CMD .build/release/Server

13. @rfdickerson
Swift Working Group
Create standards for:
• Basic Networking
• Security and Encryption
• HTTP and Websockets

14. @rfdickerson
Swift Sandbox
https://swift.sandbox.bluemix.net

15. @rfdickerson
Package Catalog
https://packagecatalog.com

16. @rfdickerson
Book
Learn about:
• Eliminate bugs in your programs
• Managing asynchrony
• Swift Package Manager
• Writing a REST webservice
• Authentication
• Database