This document discusses integrating Enterprise Java Beans (EJBs) with the OSGi framework. It covers how EJBs can be exposed as OSGi services, issues around classloading and dependencies, and how the Apache Aries project integrates transaction management and Java Persistence API support for modular EJBs running in OSGi. It provides an example of a comment service implemented as an EJB bundle in Aries to demonstrate that the approach works.

3. OSGi and the OSGi logo are trademarks or registered trademarks of the OSGi Alliance

6. How EJBs might fit into OSGi

7. A case study in implementing Modular EJB

8. Proof that it really works

10. EJB JAR – A JAR packaging EJBs

11. Modular EJB – An EJB running in OSGi

12. EJB Bundle – An OSGi bundle packaging Modular EJBs

14. The same view object may delegate to the same, or a different, EJB for successive calls

18. Singleton is like a normal service

19. Stateful EJBs are “one per lookup”

22. Defines which EJBs are exposed as OSGi services

26. OSGi class loading semantics

27. Building EJB proxy stubs

28. Transaction Manager integration

29. JPA integration

30. Security integration

31. Miscellaneous

35. Recognise bundles using Export-EJB header

39. Covers OpenEJB config files

42. OSGi class loading semantics

43. Building EJB proxy stubs

44. Transaction Manager integration

45. JPA integration

46. Security integration

47. Miscellaneous

52. Make OpenEJB visible from Application ClassLoader EJB Bundle EJB API Business API

54. OSGi class loading semantics

55. Building EJB proxy stubs

56. Transaction Manager integration

57. JPA integration

58. Security integration

61. May implement other container specific interfaces

65. OSGi class loading semantics

66. Building EJB proxy stubs

67. Transaction Manager integration

68. JPA integration

69. Security integration

75. OSGi class loading semantics

76. Building EJB proxy stubs

77. Transaction Manager integration

78. JPA integration

79. Security integration

80. Miscellaneous

83. Injection via XML <persistence-unit-ref> ...

85. Container Managed

98. OSGi class loading semantics

99. Building EJB proxy stubs

100. Transaction Manager integration

101. JPA integration

102. Security integration

103. Miscellaneous

106. No integration at this time

108. OSGi class loading semantics

109. Building EJB proxy stubs

110. Transaction Manager integration

111. JPA integration

112. Security integration

113. Miscellaneous

116. References Apache Aries: http://aries.apache.org/ Tim Ward: @TimothyWard [email_address] OSGi and JPA on YouTube: http://www.youtube.com/user/EnterpriseOSGi For more information on Enterprise OSGi take a look at Enterprise OSGi in Action : http://www.manning.com/cummins