PortNumber.java

package guiceberry2_junit3.tutorial_1_server.prod;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.google.inject.BindingAnnotation;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

@Retention(RUNTIME) 
@Target({FIELD, METHOD, PARAMETER}) 
@BindingAnnotation
public @interface PortNumber {}