The document summarizes sessions from JavaOne including collections, performance tuning at Twitter, framework comparisons, JavaEE best practices, JRockit Mission Control, and HotRockit. It also provides details on JavaOne 2012 locations in San Francisco and Tokyo and includes an additional point about Steve Jobs and San Francisco's Silicon Valley region.

1. JavaOne
Acroquest Technology

2. • (Shin Tanimoto)
• Acroquest Technology
• @cero_t
• tanimoto.shin@gmail.com
• http://d.hatena.ne.jp/cero-t/
• PJ Hadoop

3. 1. Collections
2. Performance tuning at “Twitter”
3. Framework Comparison
4. JavaEE Best Practice
5. San Francisco & Las Vegas
6. JRockit Mission Control
7. HotRockit
8. JavaOne 2012

4. 1. Collections

5. 1. Collections
1) Collections#sort
2) Iterator
3) TreeSet null
4) Parallel Array

6. 1. Collections
• coll.removeAll(s->s.length() > 20);
• people.parallelSort(comparing(Person::getAge));
• int max = people.parallel()
.filter(x->x.age >= 21)
.map(x->x.score)
.reduce(0, Math::max);

8. “Collections BOF” JavaOne

9. 2. Performance tuning
at “Twitter”

10. 2. Performance tuning
at “Twitter”
• Integer[] : 24 + (32 * length)
• Int[] : 24 + (4 * length)

11. 2. Performance tuning
at “Twitter”
• Compactness
• Throunghput
• Responsiveness
• C *T * R = a
• Tuning / Optimization

12. 2. Performance tuning
at “Twitter”
• GC Eden / S1 / S2 / Old
• S1 / S2
• Eden
• Old GC
GC
• -XX:+PrintTenuringDistribution Tenuring

13. jvm performance tuning twitter

14. 3. Framework Comparison

16. 3. Framework
Comparison
• Wicket
• JSF 2.0
• Spring MVC
• GWT

17. 3. Framework
Comparison
•
•
•

18. 3. Framework
Comparison
• GWT ≦ Spring MVC ≪ JSF < Wicket
• MyFaces

19. “world wide wait” prezi

20. 4. JavaEE Best Practice

21. 4. JavaEE Best Practice
• Service s = new ServiceImpl();
• Dao
Action / Service / Dao
•
• CoC
• 5MB war 50MB

23. 4. JavaEE Best Practice
• CDI / JPA / EJB / JAX-RS
• JMX
• Dao
• / /
•
• QA
• JavaEE6 / Maven3 / CI / Git

24. http://www.parleys.com/
Rethinking

25. 5. San Francisco & Las Vegas

32. 5. San Francisco
& Las Vegas
• Oracle
• Google
• Apple
• Intel

33. Oracle

40. TOEIC
130 Up!!!

41. 6. JRockit Mission Control

42. 6. JRockit
Mission Control
• JRockit
• VisualVM JRockit
• HotSpot
• Flight Recorder Memleak

45. 7. HotRockit

46. 7. HotRockit
• 2013 Java8
• JRockit HotSpot
•

47. Mac

48. 7. HotRockit
• JRCMD
• MBean / JMX
• JRockit Mission Control
• JRockit Flight Recorder
• Memleak
• Memleak Server

49. Memleak Server !?

50. 7. HotRockit
• Realtime GC
• no permgen space

51. http://www.parleys.com/
Hotrockit

52. 8. JavaOne 2012

53. 8. JavaOne 2012
• JavaOne Tokyo !!!
• 2012/04/04 - 05
•
•

54. Javaone Tokyo

55. 8. JavaOne 2012
• 2012/9/30 - 10/4
• San Francisco
• OOW
•

57. 8. JavaOne 2012
• : 10 15
• :8 10
• : 10
• : 28 35

59. 8. JavaOne 2012
•
•2 1
•3 1 1/3

60. Press / Blogger

61. 8. JavaOne 2012
•
• Java Oracle blog
blogger
• Call for paper

62. 8. JavaOne 2012
• : 10 15
• :3 4
• :
• : 13 20

64. 8. JavaOne 2012
•
•
•
•
•

66. HIS

67. 1. Collections
2. Performance tuning at “Twitter”
3. Framework Comparison
4. JavaEE Best Practice
5. San Francisco & Las Vegas
6. JRockit Mission Control
7. HotRockit
8. JavaOne 2012

68. One more thing ...

74. San Francisco
&
Silicon valley

75. +
1. Collections
2. Performance tuning at “Twitter”
3. Framework Comparison
4. JavaEE Best Practice
5. San Francisco & Las Vegas
6. JRockit Mission Control
7. HotRockit
8. JavaOne 2012
+1. Steve Jobs / San Francisco & Silicon Valley