JSF Exception Handling with Spring AOP

applicationContext.xml

<beans ...>
	
	<!-- We can use annotations instead of xml <3 -->
	<bean id="exceptionHandler"
			class="br.com.triadworks.sample.view.jsf.ExceptionHandler"/>
	
	<aop:config>
		<aop:aspect id="exceptionHandlerAspect" ref="exceptionHandler">
			<aop:pointcut id="managedBeanMethods"
				expression="execution(* br.com.triadworks.sample.view.jsf..*.*(..)) and bean(*Bean)"/>
			<aop:around pointcut-ref="managedBeanMethods" method="handle" />
		</aop:aspect>
	</aop:config>

</beans>

ExceptionHandler.java

package br.com.triadworks.sample.view.jsf;

import org.apache.commons.lang.StringUtils;
import org.aspectj.lang.ProceedingJoinPoint;
import br.com.triadworks.sample.view.util.FacesUtils;

public class ExceptionHandler {
	/**
	 * Default error message
	 */
	public static final String internalErrorMessage = "And internal server error has happened, please contact our support for more details.";
	
	/**
	 * Handles any exceptions thrown from the managed beans
	 */
	public Object handle(ProceedingJoinPoint pjp) {
		try {
			return pjp.proceed();
		} catch (Throwable e) {
			String message = StringUtils.defaultString(e.getMessage());
			if (!message.isEmpty())
				message = " [" + message + "]";
			FacesUtils.addErrorMessage(internalErrorMessage + message); // Use DI if you can (an example: http://github.com/rponte/jsf-loja-project).
			e.printStackTrace();
		}
		return null; // keeps in the same page
	}
}

configuring exception handling with jsf2.0,
http://jugojava.blogspot.com/2010/09/jsf-2-exception-handling.html