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I'm having an application here based on Spring MVC. My workmate (btw he's not here) configured it programmatically and everything seems to work, except for the TransactionManager. I have never configured a Spring web application like this and I have no clue what to do and also can not find any documentation about how to configure a webapplication like this. I'll just show you the 'AppInitializer' and the 'EntityManagerConfig'. AppInitializer: public class AppInitializer implements WebApplicationInitializer { @Override public void onStartup(ServletContext servletContext) throws ServletException { AnnotationConfigWebApplicationContext context; ServletRegistration.Dynamic dispatcherServletRegistration; FilterRegistration.Dynamic encodingFilterRegistration, compressionFilterRegistration; Set<SessionTrackingMode> sessionTrackingModes = new HashSet<SessionTrackingMode>(); sessionTrackingModes.add(SessionTrackingMode.SSL); context = new AnnotationConfigWebApplicationContext(); context.setServletContext(servletContext); context.scan("de.devbliss.doc"); servletContext.addListener(new ContextLoaderListener(context)); servletContext.addListener(new Log4jConfigListener()); dispatcherServletRegistration = servletContext.addServlet("main", new DispatcherServlet(context)); dispatcherServletRegistration.setLoadOnStartup(1); dispatcherServletRegistration.addMapping("/*"); encodingFilterRegistration = servletContext.addFilter("encodingFilter", CharacterEncodingFilter.class); encodingFilterRegistration.setInitParameter("encoding", "UTF-8"); encodingFilterRegistration.setInitParameter("forceEncoding", "true"); encodingFilterRegistration.addMappingForUrlPatterns(null, false, "/*"); compressionFilterRegistration = servletContext.addFilter("compressionFilter", GzipFilter.class); compressionFilterRegistration.addMappingForUrlPatterns(null, false, "/*"); co

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