Spring recursively loading application context

Question

I want to invoke a method after the application context is loaded. I used ApplicationListener interface and implemented onApplicationEvent.

applicationContext.xml

<beans>
    <bean id="loaderContext" class="com.util.Loader" />
    <bean id="testServiceHandler" class="com.bofa.crme.deals.rules.handler.TestServiceHandlerImpl">
</beans>



Loader.java

public class Loader implements ApplicationListener {

   public void onApplicationEvent(ApplicationEvent event) {
         ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
         TestHandlerServiceImpl test = (TestServiceHandlerImpl)context.getBean("testServiceHandler"); 
   }
}

But the above code goes recursive. Is it possible to get a bean from application context inside onApplicationEvent function ?

You're loading the app context again; not sure what you'd expect. Make it context-aware or something. — Dave Newton, Dec 19 '14 at 15:24
You should take a look at : http://stackoverflow.com/questions/1088550/spring-how-to-call-a-method-after-bean-initialization-is-complete — yunandtidus, Dec 19 '14 at 15:25

score 1 · Accepted Answer · answered Dec 19 '14 at 15:24

1

Instead of creating a new context on the listener, implement the interface ApplicationContextAware, your context will be injected.

answered Dec 19 '14 at 15:24

Andres

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Alan Hay · Answer 2 · 2014-12-19T15:35:57.663

If you are using Spring 3 or higher:

As of Spring 3.0, an ApplicationListener can generically declare the event type that it is interested in. When registered with a Spring ApplicationContext, events will be filtered accordingly, with the listener getting invoked for matching event objects only.

http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/context/ApplicationListener.html#onApplicationEvent-E-

which would look like the following. Note also that this solution will ensure it is only executed on this event (i.e. start/load): it looks to me like even if you inject the context to your original class it would be executed for any event.

public class Loader implements ApplicationListener<ContextStartedEvent> {

   public void onApplicationEvent(ContextStartedEvent event) {
         ApplicationContext context = event.getApplicationContext(); 
   }
}

See examples here:

http://www.tutorialspoint.com/spring/event_handling_in_spring.htm

Spring recursively loading application context

2 Answers2