An Example demonstrating prototype injection. Each time the 'BeanThatDependsOnAnother' is used, it invokes a method on the 'Dependency' class, triggering the creation of a new bean, thanks to Spring's smart use of proxies

gistfile1.java

package org.springsource.examples.sawt.proxy;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.*;

public class Main {
    
    @Configuration
    @EnableAspectJAutoProxy
    static class MyConfigurationClass {
        @Scope(proxyMode = ScopedProxyMode.TARGET_CLASS, value = "prototype")
        @Bean
        public Dependency client() {
            return new Dependency();
        }

        @Bean
        public BeanThatDependsOnAnother service() {
            return new BeanThatDependsOnAnother();
        }
    }

    static class Dependency {
        public Dependency() {
            System.out.println(getClass().getName());
        }

        public void sayHello() {
            System.out.println("Hello");
        }
    }

    static class BeanThatDependsOnAnother {
        @Autowired
        private Dependency dependency;

        void doSomething() {
            dependency.sayHello();
        }
    }

    public static void main(String[] args) throws Throwable {
        AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(MyConfigurationClass.class);
        BeanThatDependsOnAnother s = ac.getBean(BeanThatDependsOnAnother.class);
        s.doSomething();
        s.doSomething();
    }
}

/** 

// OUTPUT

2012-04-24 14:13:10 ClassPathBeanDefinitionScanner [INFO] JSR-330 'javax.inject.Named' annotation found and supported for component scanning
2012-04-24 14:13:10 AnnotationConfigApplicationContext [INFO] Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@48f0c0d3: startup date [Tue Apr 24 14:13:10 EEST 2012]; root of context hierarchy
2012-04-24 14:13:10 AutowiredAnnotationBeanPostProcessor [INFO] JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2012-04-24 14:13:10 DefaultListableBeanFactory [INFO] Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@48ff2413: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,myBean.MyConfigurationClass,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0,org.springframework.aop.config.internalAutoProxyCreator,scopedTarget.client,client,service]; root of factory hierarchy
org.springsource.examples.sawt.proxy.MyBean$Dependency$$EnhancerByCGLIB$$d2d7bbf6
org.springsource.examples.sawt.proxy.MyBean$Dependency
Hello
org.springsource.examples.sawt.proxy.MyBean$Dependency
Hello

Process finished with exit code 0
*/