1. Clement Escoffier,
Pierre Bourret

2. OSGi™
&
Dynamic Systems

5. Module Layer
Lifecycle Layer
Service Layer
Modular, Static applications
Extender-based approach
(coarse grain dynamism)
Dynamic applications
(fine-grain dynamism)

10. Why choosing the harder case ?

11. Adaptability

12. Something
Somewhere
Somehow

16. iPOJO
2005 - 2012

18. iPOJO 0.x
2005 - 2008

19. A simple model to develop
dynamic applications

20. Plain Old Java Object

21. Just the business logic

22. @Component
@Instantiate
public class Host {
@Requires
private Shape[] shapes;
public Host() {
// Create the frame...
}
//...
}

23. @Component
@Provides
@Instantiate
public class Circle implements Shape {
@ServiceProperty(name=Shape.NAME_PROPERTY)
private String name;
@Validate
public void start() {
name = "Circle";
}
public void draw(Graphics2D g2, Point p) {
// Draw a circle
}
}

27. iPOJO 1.x
2008 - 2012

28. Extension of the
dependency model
temporal, proxies, grace
periods, consistency, caching…

29. Reached
a level of maturity

31. 5000
downloads / month

32. Used in
large-scale project
(>1 000 000 LOC)

34. Where did it failed ?

35. 70 projects using iPOJO

36. From 20 000 LOC
To > 1 000 000 LOC

37. How developers are using iPOJO
?

38. The most wanted features

39. Death by <xml/>

40. XML required to create complex
instances

41. @Configuration
public class MyConfiguration {
Instance myInstance = instance().of(MyComponent.class)
.with("message").setto("foo")
.with("list").setto(list(1, 2, 3));
}
1.10

42. Death by (LDAP)

43. LDAP has a simple syntax
….
for simple filters

44. No variability

45. Very very time-consuming
debugging

46. @Requires(filter=“(property=${value})”
private Service service;
1.10

47. Values from:
System properties
Instance configuration
Context sources

48. Service dependency
interceptors
2.0

49. Tracker
interceptor
Ranking
interceptor

50. Tracker
interceptor
Refuse services
Transform services
Filtering

51. Sophisticated selection
among a set of provider
Advanced Ranking
Ranking
interceptor

52. Online manipulation

54. Offline manipulation
not required anymore
2.0

55. Inheritance
2.0

56. Better testability and debugging

57. Unclear errors
Dying instances

58. WTF !
All my fields are null

59. Declaration services:
Is your declaration bound ?
What was the error ?
1.10

60. Architecture of stopped instances
1.10

61. Injected values cached in fields
2.0

62. Easier extensibility

63. New injection machine:
Injection chains
2.0

64. Annotation-based
configuration
2.0

65. @Handler
public class MyHandler extends PrimitiveHandler<MyAnnotation> {
public void configure(MyAnnotation configuration, ...){
//…
}
}

66. Intra-bundle injection

67. @Instance(component=MyClass.class)
private MyClass instance;
@Instance(component=MyClass.class, name=“name”)
private MyClass name;
2.0

68. Conclusion

69. 1.10 -> Soonish
2.0 -> End of June

70. End of file