Single page web applications (SPAs) have evolved since the 1990s with technologies like applets, Flash, AJAX gaining popularity. SPAs provide benefits like improved performance but also challenges around navigation, search engine optimization, and analytics. Frameworks like Scala and Spray help address these challenges and support features of SPAs including routing, data binding, modularity, and offline capabilities.

1. Single Page
Web Applications
!
with
!
Scala and Spray

2. SPA HISTORY

3. ’95 – Applets

4. ’96 – Flash

5. ’96 – IFRAME
’99 – XML HTTP AXC
’05 – AJAX
’05 – SPA
’06 – GWT
’07 – SILVERLIGHT

6. PROBLEMS

7. NAVIGATION
#FRAGMENT ID

8. SEO
• GOOGLE PROTOCOL
( _escaped_fragment_ )
• USER AGENTS
DuckDuckBot/1.1
facebookexternalhit/1.1

9. ANALYTICS
ERROR TRACKING

10. BENEFITS

11. PERFORMANCE

12. SEPARATION
OF ROLES

13. MAIN CHANGE

14. Routing
Data Binding
Templating
Form Handling
IoC / DI
Async
Modularisation
Offline
Testing
MVC / MVVM

15. HTML JSONHTTP
views
model
controllers
services
services
domain
legacy database

17. A
E
F G H
B
I J
root
C D
/user/A/D/H

18. MODULES
• PERSISTENCE
• CLUSTERING
• HTTP
• JAVA

20. COMPONENTS
SPRAY-ROUTING
high-level
server-side
SPRAY-CLIENT
high-level
client-side
SPRAY-CAN
low-level HTTP
server- and client-side
SPRAY-HTTP
!
data model

21. API LAYER
REST
API
Application Logic
!
!
SOAP
action API
B J
reply
action
reply
request
response
A
E
F
G H
I
/
D
C
K
request
response

22. Typesafe Activator
!
http://typesafe.com/platform/getstarted

23. @slavaschmidt
slava.schmidt@dancingcode.com