If you are new to OSGi, or have heard about it or experienced (good or bad) a little of OSGi then this is the talk for you. Peter Kriens, the OSGi Alliance Evangelist and Tim Ward, co-author of Enterprise OSGi in Action will provide a high level technical introduction to OSGi, covering the core concepts that make up this standard. OSGi has been around since 1998 and was formerly JSR8. Today its one of the only Java standards that exist outside of the JCP and this talk will explore the original objectives of OSGi and how they have remained true while being extended to apply across many vertical markets including enterprise, embedded / IoT, etc. Microservices and OSGi. From the outset OSGi promoted a ‘services-first’ approach, initially within the JVM, and in the last few years, across JVM’s with the Distributed OSGi specifications. The Microservices approach has been gaining industry traction over the last 12 months and Peter and Tim will explain how OSGi provides you with a standards-based solution to Microservices, how simple it is to take advantage of, and the benefits that you can achieve by adopting OSGi to realize it. They will also highlight some of the common misconceptions and challenges that people have when starting out with OSGi, just so you have a full and frank understanding of the many benefits and some of the hurdles you may encounter as you start down the OSGi path. As they say there is no such thing as a free lunch, however it tastes mighty fine once you get there! Bios: Peter Kriens Peter Kriens is an independent consultant since 1990.He currently works for the OSGi Alliance and Paremus. During the eighties he developed advanced distributed systems for newspapers based on microcomputers based on, at the time very novel, object oriented technologies. For this experience in Objects he was hired by a number of international companies, including Adobe, Intel, Ericsson, IBM, and many others. During his work at Ericsson Research in 1998 he got involved with the OSGi specification; Later he became the primary editor for these specifications. In 2005 he was awarded the OSGi Fellows title. After taking a sabbatical in 2012 to develop jpm4j he returned to the OSGi Alliance to help increasing adoption. He is Dutch but decided to live in France. Tim Ward Tim is a Senior Consulting Engineer and Trainer at Paremus, a co-author of Enterprise OSGi in Action, and has been actively working with OSGi for over six years. Tim has been a regular participant in the OSGi Core Platform and Enterprise Expert Groups, and led the development of several specifications, including OSGi Promises and Asynchronous Services. Tim is also an active Open Source committer and a PMC member in the Apache Aries project, which provides a container for enterprise OSGi applications. Tim is a regular conference speaker, and can often be found at JavaOne, Devoxx, OSGi DevCon, OSGi Community Event, EclipseCon, Jazoon and JAX London.

1. OSGi – The µServices Kernel
A high level technical introduction to OSGi

2. Once upon a time in 1998 …

3. long before SOA …

4. A JSR was born …

6. 8

7. the OSGi Service FrameworkService

8. Service

9. Service

10. Service

11. To prevent confusion, we coined
the term …

12. micro-service

13. micro-service

14. micro-service

15. they did it again …

16. µService

17. because we are worth it …

18. Let’s go back to the beginning

19. Modularity
• modules have a private space and share a public
space
• modules limit their visibility and exposure
• complexity ∷ parts2
A B
C D

20. Modularity
• modules have a private space and share a public
space
• modules limit their visibility and exposure
• complexity ∷ parts2
A B
C D
Pub

21. Modularity
• modules have a private space and share a public
space
• modules limit their visibility and exposure
• complexity ∷ parts2
A B
C D
Pub

22. SoftwareComplexity
Moving Parts
Modularity’s Secret

23. SoftwareComplexity
Moving Parts
Modularity’s Secret

24. SoftwareComplexity
Moving Parts
Modularity’s Secret

25. SoftwareComplexity
Moving Parts
Modularity’s Secret

26. A
v1.0
C
v1.1
B
v2.3

27. Done?

28. Interfaces/API
User
Class
Implementer
Class
Interface

29. User
Class
Implementer
Class
Interface
Interfaces/API

30. package com.api package com.provider.implpackage com.consumer.impl
User
Class
Implementer
Class
Interface
Interfaces/API

31. package com.api package com.provider.implpackage com.consumer.impl
DocumentBuilderYour App Xerces
User
Class
Implementer
Class
Interface
Interfaces/API

32. package com.api package com.provider.implpackage com.consumer.impl
User
Class
Implementer
Class
Interface
Interfaces/API

33. package com.api package com.provider.implpackage com.consumer.impl
User
Class
Implementer
Class
Interface
Interfaces/API

34. package com.api package com.provider.implpackage com.consumer.impl
User
Class
Implementer
Class
Interface
private
Interfaces/API

35. Now what?

36. package com.api package com.provider.implpackage com.consumer.impl

37. package com.api package com.provider.implpackage com.consumer.impl
Listen

38. package com.api package com.provider.implpackage com.consumer.impl
Register
Listen

39. package com.api package com.provider.implpackage com.consumer.impl
Register
GetListen

40. An honest broker …

41. Overhead?

42. µService call ≡ Method call

43. µService ≡ object

44. Closer with less irritation …

45. .

46. .
REST

47. SOA
.
REST

48. SOA “MICRO
Service”
.
REST

49. SOA “MICRO
Service”
µservice
.
REST

50. OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
G
B
E
H
C
F
I

51. OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
B
E
H
C
F
I

52. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
F
I
B

53. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
F
I

54. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
F
I

55. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
F
I

56. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
D
A
G
E
H
C
F
I

57. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
D
A
G
E
H
C
FF

58. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF

59. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF
Ba Bb
D
A
G
E
H
C
F

60. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF

61. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF
I v2.0

62. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF
I v2.0
S;1.1.0
F

63. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF
I v2.0
S;1.1.0
F

64. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF
I v2.0
S;1.1.0
F

65. Ba Bb
OSGi
• Adaptive
• Flexible
• Contracts
• Robust
• Secure
• Evolution
• Distributed
D
A
G
E
H
C
FF
I v2.0
S;1.1.0
F
REST

66. Service Patterns
• Factory
• Listener
• Discovery
• Distribution
• Dependencies

67. Service Patterns
• Factory
• Listener
• Discovery
• Distribution
• Dependencies

68. Service Patterns
• Factory
• Listener
• Discovery
• Distribution
• Dependencies

69. Service Patterns
• Factory
• Listener
• Discovery
• Distribution
• Dependencies

70. Service Patterns
• Factory
• Listener
• Discovery
• Distribution
• Dependencies

71. Service Patterns
• Factory
• Listener
• Discovery
• Distribution
• Dependencies

72. But OSGi is so complicated!

73. Sigh …

74. Complexity is in the eye of the
beholder

75. Complexity is in the eye of the
beholder

77. The right tool for the job …

79. meet
bnd(tools)

81. bnd(tools)
• DS Component Annotation support
• Access to maven central and more
• Based on Capability model
• Extensive debugging with dynamic updating
• Executable JARs
• Release tool with semantic versioning
• Baselining
• Integration with Continuous Integration

82. bnd(tools)
• DS Component Annotation support
• Access to maven central and more
• Based on Capability model
• Extensive debugging with dynamic updating
• Executable JARs
• Release tool with semantic versioning
• Baselining
• Integration with Continuous Integration
See
N
eil
B
ar
tlett’s
talk
o
n
B
n
d
to
o
ls
n
ext

83. OSGi enRoute

84. OSGi enRoute

86. costofchange
functionality

87. costofchange
functionality
dynamic
languages

88. costofchange
functionality
dynamic
languages
Java/OSGi

89. costofchange
functionality
dynamic
languages
Java/OSGi

90. In the end,
OSGi is inevitable …

91. OSGi Release 6
• June 2nd the OSGi Core Release 6 Specification received its final
approval and will be available this week to the public for downloading.
• http://www.osgi.org/Specifications/HomePage
• The OSGi Board of Directors also approved the publication of an Early
Draft Specification of OSGi Enterprise Release 6 for downloading.
• http://www.osgi.org/Specifications/Drafts

92. OSGi Release 6
• June 2nd the OSGi Core Release 6 Specification received its final
approval and will be available this week to the public for downloading.
• http://www.osgi.org/Specifications/HomePage
• The OSGi Board of Directors also approved the publication of an Early
Draft Specification of OSGi Enterprise Release 6 for downloading.
• http://www.osgi.org/Specifications/Drafts
NEW