??? (try)

1
OSGi ?????Java????
??? (try) cfliao_at_ieee.org ????? ?????????????
2
??

• OSGi Yet another framework ?
• ????
• ?????????
• ??????
• ?? OSGi?????

3
Java????????
Java cp crack.jarmylib-v3.jarmylib-v2.jarmylib
-v1.jar
org.coscup.s1
org.coscup.s1
org.coscup.s1
A
A
B
B
B
C
C
C
C
D
D
E
4
Java????????

• ????????package level???
• Classloader?????classpath?????????
• ???????????
• ??classpath???????????????
• ????????
• ????????,???????????????????
• ????????
• ???????public,??clients?????,????????

5
Java????????
org.coscup.s1
com.evil-empire.client
MySecretA
ClientX
ClientY
org.coscup.s2
ClientZ
???????????????
6
Java?????????Packages?????
org.coscup.s1
com.evil-empire.client
MyScretA
ClientX
ClientY
MyPublicB
org.coscup.s2
?? ?? MyPublicB???????
ClientZ
7
Java???????????????????
org.coscup.s1
A
B
C
?? ????1?
org.coscup.s1
B
C
D
?? ????5?
E
org.coscup.s1 3???
8
????????
????????
????
????
9
????????
????????
???? ????,???,????
Hi,??????????????,????????????,??????????
???? ????,???,????
???? ????,???,????
????????????,?????
???? ???,????
???? ???,????
????
???????
10
OSGi ??

• ?Intel?IBM?NEC?Mitsubishi?Motorola?NTT?Nokia?Oracl
  e?Samsung?Siemens AG?BenQ??????????????
• OSGi????????JVM?????????(Universal Middleware)???

11
OSGi??

• ???1999?,?????????????????????????
• 2003 ??????????Java????
• 2004 ??????????????,Eclipse 3.x????OSGi
• 2006 ???Java????????????OSGi???

12
OSGi????

• OSGi????????Bundle
• ???????Bundle???? Java-based?jar??
• Bundle?????Bundle???????

13
Bundle???

• ???? (???jar??)
• /
• / META-INF/MANIFEST.MF
• / (java classes)
• / (.jar)
• (???????,??????org.osgi.framework.BundleActivator?
  ????)
• ?MANIFEST.MF?
• package ?import / export??
• Bundle?????

14
??Bundle????Java Module

• ?MANIFEST.MF?????????
• ????export?????,????????
• ??????bundle
• ????import??,???????????

Require-Bundle my-telephony-service

Import-Package org.coscup.telephony
version(1.0.0,1.0.5
locationKitchen
15
Bundle????????

• ??Classpath
• Required Bundle
• Imported Bundle
• Local classpath

16
Bundles??????

• ???OSGi????????????????????????
• ???????Bundle????????,????????Bundles????

17
Bundles??????

• Bundles???????????????POJO???ServiceRegistry?
• ????(publish)???(discovery)???(bind)??????

ServiceReference sr context.getServiceReference(
EventAdmin.class.getName()) EventAdmin ea
(EventAdmin) context.getService(sr)
18
?????????????

• ???????????????
• ????????????
• ???????????
• ????
• ServiceTracker??
• Spring OSGi

19
?????????

• OSGi ???
• Knopflerfish
• Felix (Apache??,???Oscar)
• Equinox (Eclipse??)
• OSGi????
• Eclipse Maven
• Eclipse Knopflerfish Plugin

Equinox
20
OSGi?????

• JSR 291?JSR 277??
• OSGi?J2SE 7?Java EE6????
• Distributed OSGi (RFC119)