This document discusses Java application development on Google App Engine (GAE). It provides details on frameworks like slim3 and Scenic3 that can be used to build Java web applications on GAE. It also discusses techniques to optimize application startup or "spin-up" time, such as leveraging caching and reducing class loading. Specific examples are given of spin-up times for sample Java applications on GAE ranging from 1,600ms to 3,000ms.

1. GAE
spin-up
Java
shuji_w6e

2. Java
@shuji_w6e
blog:

3. AppEngine
spin-up
T2framework Scenic3
Datastore Editor

4. Motivation

5. AppEngine
>> Swing
CMS

6. AppEngine
Datastore
spin-up 9
JSP

7. etupirkacms
slim3
AppEngine
spin-up
1,600ms - 1,900ms
1,800ms - 2,200ms
http://code.google.com/p/etupirka/

8. spin-up

9. 3
slim3 (^q^)
(^o^)

10. spin-up
spin-up spin-down
3,000ms 2,000ms
>>

11. slim3

12. Class Loading
spin-up
jar

15. Web 1
GAE spin-up
spin-down

16. Mail, TQ, Memcache

17. 1
>>
>> TQ

18. Datastore /
>>
>> TQ → 300ms -400ms

19. Controller

20. slim3 controller
1 Action Method = 1 Controller Class
URL Controller

21. Simple VS Rich
GAE
>>

22. T2 framework

23. Page class, Action Method
@Page("/helloworld")
public class HelloPage {
@Default
public Navigation
index() {
return SimpleText
.out("HelloWorld");
}
@ActionPath(“post”)
public Navigation post() {
return ...;
}
}

24. T2 framework
etupirkacms
−

25. ...
Page
Page 20
slim3

26. Scenic3
slim3
T2 Framework Page
APT slim3 Controller
T2 slim3
http://code.google.com/p/scenic3/

27. Scenic3
Page ActionController_1
+ Action_1
+ Action_2 APT
ActionController_2
APT
path
PageMatcher Scenic3FrontController

28. PageClass
HotReloading
slim3 Controller
PageTester

29. cache

30. etupirkacms
Request
put
get
PageCaheFilter
PageCache
(id=path)
get
Action
Template
load/parse (id=templateNa
me)
Template File put Datastore

32. JSP
>> http://trac.deathmarch.jp/pirka/
pure Java

33. session
spin-up 100-300ms

34. Test

35. Datastore Viewer

36. OK
Key Blob

37. Kotan
Swing
Key Blob
http://code.google.com/p/kotan/