Ways to get Spring ApplicationContext -In Spring DM

Couple of other ways to get hold of ApplicationContext (rather than doing new ClasspathXmlApplicationContext()).

1. Create a bean which is ApplicationContextAware


MessageChannel msgCh = (MessageChannel)ApplicationContextHolder.getApplicationContext().getBean("eventChannel");

msgCh.send(msg);


public class ApplicationContextHolder implements ApplicationContextAware {

private static ApplicationContext appContext;

public void setApplicationContext(ApplicationContext ctx)

throws BeansException {

System.out.println("*** ApplicationContextHolder::setApplicationContext()...");

ApplicationContextHolder.appContext = ctx;

}

public static ApplicationContext getApplicationContext() {

return appContext;

}

}


This one is in the case of Spring DM

2. Accessing the ApplicationContext from BundleContext (By default every bundle publishes the Application Context as a Service).



public static ApplicationContext getApplicationContext() {

if (appCtx == null) {

try {

ServiceReference[] svcRef = bundleContext.getAllServiceReferences("org.springframework.context.ApplicationContext", "(org.springframework.context.service.name=ContextInClass)"); // Service name is the Bundle Symbolic Name

ServiceReference ref = svcRef[0];

appCtx = (ApplicationContext) bundleContext.getService(ref);

} catch (Exception e) {

e.printStackTrace();

}

}

return appCtx;

}

This is the preferred approach if you wish to use the Application Context from another bundle.