Java - Initializing the Web App with Springframework

less than 1 minute read

In order to initialize the Web application with Springframework, it is required to detect when context has been initialized. You can achieve it by defining a subclass with deriving ApplicationListener

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public class ApplicationListenerBean implements
		ApplicationListener<ContextRefreshedEvent> {
	@Override
	public void onApplicationEvent(ContextRefreshedEvent contextEvent) {
             // add initialization code
	}
}

Then it is required to define this class in application context xml file as shown below example

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	<bean id="applicationContextListener" class="com.demo.app.ApplicationListenerBean">
	</bean>

If you would like to capture the ApplicationContext in Springframework, you can achieve by subclassing ApplicationContextAware

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public class ApplicationContextProvider implements ApplicationContextAware {
	private static ApplicationContext ctx = null;
	@Override
	public void setApplicationContext(ApplicationContext ctx)
			throws BeansException {
		this.ctx = ctx;
	}
	public static ApplicationContext getApplicationContext()
			throws BeansException {
		return ctx;
	}
}
// in xml
	<bean id="applicationContextProvider" class="com.demo.app.ApplicationContextProvider"/>

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