Modularity with OSGi
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The document discusses OSGi and modularity. It describes how OSGi allows software to be built from independent components called bundles that have well-defined dependencies and interfaces. This modularity improves productivity, reduces complexity, and makes applications easier to maintain and extend over time. The OSGi framework provides core services like class loading, life cycle management, and a service registry that bundles can use to interact, allowing applications to be dynamically assembled at runtime from independent bundles.
Modularity with OSGi
- 1. OSGi & Modularity 2011-06-23 IBM Montpellier by Peter Kriens dinsdag 28 juni 2011 1
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- 5. Productivity Application Complexity dinsdag 28 juni 2011 3
- 6. Productivity Assembly Application Complexity dinsdag 28 juni 2011 3
- 7. Productivity Structured Programming Assembly Application Complexity dinsdag 28 juni 2011 3
- 8. Productivity Structured Object Oriented Programming Programming Assembly Application Complexity dinsdag 28 juni 2011 3
- 9. Productivity Service Oriented Programming? Structured Object Oriented Programming Programming Assembly Application Complexity dinsdag 28 juni 2011 3
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- 11. Application dinsdag 28 juni 2011 4
- 12. Extensions Application Application Convenience Foundation Basic Something Core Java VM dinsdag 28 juni 2011 4
- 13. minilang party pos. product workeffort workflow … accounting assetmaint content Extensionsbi ebay ecommerce googlebase guiapp hhfacility manufact. marketing minerva oagis order Application Application layer common catalina base datafile entity widget … Application Convenience resolver rome serializer servlets tomcat xalan bsf mail mx4j naming jetty poi wsdl4j bsh Foundation Basic Something jenks jpos18 jython looks lucene xerces velocity jakarta jcl json jdbm jdom xmlapis ws-commons Core Libs log4j barcode4j axis batik commons xmlrpc geronimo httpunit freemarker ezmorph fop derby xmlgraphics .. Java VM Java VM rt jce jsse plugin sunjce_prov. dnsns .. dinsdag 28 juni 2011 4
- 14. minilang party pos. product workeffort workflow … accounting assetmaint content Extensionsbi ebay ecommerce googlebase guiapp hhfacility manufact. marketing minerva oagis order Application Application layer common catalina base datafile entity widget … Application Convenience resolver rome serializer servlets tomcat xalan bsf mail mx4j naming jetty poi wsdl4j bsh Foundation Basic Something jenks jpos18 jython looks lucene xerces velocity jakarta jcl json jdbm jdom xmlapis ws-commons Core Libs log4j barcode4j axis batik commons xmlrpc geronimo httpunit freemarker ezmorph fop derby xmlgraphics .. Java VM Java VM rt jce jsse plugin sunjce_prov. dnsns .. dinsdag 28 juni 2011 4
- 15. Java VM party common resolver axis xerces Begin rt assetmaint catalina mail ezmorph xmlapis jce hhfacility base jenks servlets xmlrpc Here jsse pos. datafile jakarta jetty xmlgraphics plugin content entity log4j looks sunjce_prov. manufact. widget httpunit jdbm dnsns product … mx4j bsf .. bi rome batik bsh marketing workflow jpos18 fop velocity workeffort ecommerce jcl tomcat ws-commons ebay oagis barcode4j poi geronimo minerva … freemarker lucene .. minilang googlebase serializer jdom json accounting order naming commons xalan guiapp ofbiz jython derby wsdl4j dinsdag 28 juni 2011 5
- 16. Java VM party common resolver axis xerces Begin rt assetmaint catalina mail ezmorph xmlapis jce hhfacility base jenks servlets xmlrpc Here jsse pos. datafile jakarta jetty xmlgraphics plugin content entity log4j looks sunjce_prov. manufact. widget httpunit jdbm dnsns product … mx4j bsf .. bi rome batik bsh Class marketing workflow jpos18 fop velocity Not workeffort ecommerce jcl tomcat ws-commons Found ebay oagis barcode4j poi geronimo Exception minerva … freemarker lucene .. minilang googlebase serializer jdom json accounting order naming commons xalan guiapp ofbiz jython derby wsdl4j dinsdag 28 juni 2011 5
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- 22. low coupling, dinsdag 28 juni 2011 9
- 23. low coupling, high cohesion & dinsdag 28 juni 2011 9
- 24. low coupling, high cohesion & encapsulation dinsdag 28 juni 2011 9
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- 26. Applications S (bundles) E Service C U Life Cycle R I Module T Y Execution Environment OS + Hardware dinsdag 28 juni 2011 11
- 27. Code protected boolean report(Reporter reporter) { if (reporter.getWarnings().size() > 0) { System.err.println("Warnings"); for (Iterator<String> e = reporter. getWarnings().iterator(); e.hasNext();) { System.err.println(" " + e.next()); } } return false; } dinsdag 28 juni 2011 12
- 28. Functions protected boolean report(Reporter reporter) { if (reporter.getWarnings().size() > 0) { System.err.println("Warnings"); for (Iterator<String> e = reporter. getWarnings().iterator(); e.hasNext();) { System.err.println(" " + e.next()); } } return false; } dinsdag 28 juni 2011 13
- 29. Classes protected boolean report(Reporter reporter) { if (reporter.getWarnings().size() > 0) { System.err.println("Warnings"); for (Iterator<String> e = reporter. getWarnings().iterator(); e.hasNext();) { System.err.println(" " + e.next()); } } return false; } dinsdag 28 juni 2011 14
- 30. Classes Class D Class C Class B Class A dinsdag 28 juni 2011 14
- 31. Packages Class D Class C Class B Class A dinsdag 28 juni 2011 15
- 32. Packages Class D Class C dinsdag 28 juni 2011 15
- 33. Bundles Bundle A Bundle B p q-1.4 Bundle A . dinsdag 28 juni 2011 16
- 34. Bundles Bundle A Bundle B p p q-1.4 q-[1.2,1.8) Bundle A r r . import private export dinsdag 28 juni 2011 17
- 35. Bundles Bundle A Bundle B imports p p q-1.4 q-[1.2,1.8) Bundle A r r . import private export dinsdag 28 juni 2011 17
- 36. Bundles Bundle A Bundle B imports p p q-1.4 exports q-[1.2,1.8) Bundle A r r . import private export dinsdag 28 juni 2011 17
- 37. MANAGE- System MENT bundle BUNDLE Bundle X-v2 X Bundle Bundle B A dinsdag 28 juni 2011 18
- 38. Services interface Foo { void foo(); } void foo() { … … s.foo() } … dinsdag 28 juni 2011 19
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- 44. bundle A-1.2 c b bundle C-1.0 bundle a B-4.1 dinsdag 28 juni 2011 21
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- 47. The Component Framework dinsdag 28 juni 2011 22
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- 49. Q&A dinsdag 28 juni 2011 24
- 50. Thanks! dinsdag 28 juni 2011 25