1. Spring Framework Jens Rühmkorf Tech Talk, DLR Köln-Porz, 17. März 2009

3. Überblick und Einführung

6. Übersicht des Spring Frameworks http://static.springframework.org/spring/docs/2.5.x/reference/

11. Grundlegende Prinzipien

12. „ Separation of Concerns “ (Dijkstra, 1974)

26. Funktionsweise eines DI-Frameworks am Beispiel

30. Reportgenerator (3) Schritt 1: Führe Container ein (cont‘d) public class Container { public static Container instance ; private Map<String, Object> components ; public Container() { components = new HashMap<String, Object>(); instance = this ; components .put( &quot;reportGenerator&quot; , new PdfReportGenerator()); components .put( &quot;reportService&quot; , new ReportService()); } public Object getComponent(String id) { return components .get(id); } }

32. Reportgenerator (5) Schritt 2: Verwende Service-Locator Pattern (cont‘d) public class ServiceLocator { private static Container container = Container. instance ; public static ReportGenerator getReportGenerator() { return (ReportGenerator) container .getComponent( &quot;reportGenerator&quot; ); } } public class ReportService { private ReportGenerator reportGenerator = ServiceLocator. getReportGenerator (); // Rest weggelassen }

34. Reportgenerator (7) Schritt 3: Realisiere DI via Reflection (cont‘d) public class Container { // Ausschnitt! private void processEntry(String key, String value) throws Exception { String[] parts = key.split( &quot;.&quot; ); if (parts. length == 1) { // erzeuge Komponente Object component = Class. forName (value).newInstance(); components .put(parts[0], component); } else { // injiziere Dependency Object component = components .get(parts[0]); Object reference = components .get(value); PropertyUtils. setProperty (component, parts[1], reference); } } }

37. Reportgenerator (10) Schritt 4: Konfiguration mit Spring Beans (cont‘d) import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Main { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext( &quot;beans.xml&quot; ); ReportService reportService = (ReportService) context.getBean( &quot;reportService&quot; ); reportService.generateAnnualReport(2008); } }

38. Reportgenerator (10) Schritt 4: Konfiguration mit Spring Beans (cont‘d) <? xml version = &quot;1.0&quot; encoding = &quot;UTF-8&quot; ?> < beans xmlns = &quot;http://www.springframework.org/schema/beans&quot; xmlns:xsi = &quot;http://www.w3.org/2001/XMLSchema-instance&quot; xsi:schemaLocation = &quot;http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd&quot; > < bean id = &quot;defaultGenerator&quot; class = &quot;de.dlr.spring101.report.step04.PdfReportGenerator&quot; /> < bean id = &quot;reportService&quot; class = &quot;de.dlr.spring101.report.step04.ReportService&quot; > < property name = &quot;reportGenerator&quot; > < ref local = &quot;defaultGenerator&quot; /> </ property > </ bean > </ beans >

39. Beans & ihre Konfiguration in Spring

54. Zusammenfassung & Ressourcen

59. Vielen Dank.