Master/Reference Architectures and Patterns/EJB 3.0 Code/Micah Examples/src/examples/stateless/interceptors/AuditorInterceptor.java


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package examples.stateless.interceptors;

import javax.interceptor.AroundInvoke;
import javax.interceptor.InvocationContext;

public class AuditorInterceptor {
	@AroundInvoke
	public Object checkCost(InvocationContext inv) throws Exception {
		if (inv.getMethod().getName().startsWith("getTax")) {
			Object[] o = inv.getParameters();
			double cost = ((Double)o[0]).doubleValue();
			if (cost > 50) {
				System.out.println("Cost is > 50!");
			}
		}
		return inv.proceed();
	}
}