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TinyIOC

时间:2015-07-01 11:43:44      阅读:93      评论:0      收藏:0      [点我收藏+]

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在动不动就是SSH的年代,IOC,AOP不是啥新东东。Spring之所以庞大,是因为集成了太多太多的功能。  验证性的开发了一下,仅实现IOC、AOP、子容器简单实践一下。 
当然了,必须以HelloWorld示例: 
接口: 

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public interface Hello {
    void sayHello(String name);
}



实现: 

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@Singleton
@Named("abc")
public class Hello1Impl implements Hello {
    public void sayHello(String name) {
        System.out.println("Hello:" + name);
    }
}



测试: 

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public static void main(String[] args) {
        BeanContainer container = BeanContainerFactory.getBeanContainer();
        container.registerClass(Hello1Impl.class);
        Hello hello = container.getBeanByType(Hello.class);
        hello.sayHello("abc");
        hello = container.getBeanByName("abc");
        hello.sayHello("def");
    }



运行结果: 

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Hello:abc
Hello:def



可以看到根据接口和命名访问都是没有问题的。 
再来一个AOP的例子: 
先写个拦截器: 

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@Request
public class InterceptorImpl implements InterceptorBefore, InterceptorAfter, InterceptorException {
    public void after(Object object, Method method, Object... args) {
        System.out.println(String.format("%s->after\n", method.getName()));
    }

    public void before(Object object, Method method, Object... args) {
        System.out.println(String.format("%s->before\n", method.getName()));
    }

    public void exception(Object object, Method method, Throwable throwable, Object... args) {
        System.out.println(String.format("%s->exception:%s\n", method.getName(), throwable.getMessage()));
    }
}



拦截点有前置,后置及异常,可以实现在一个类上,也可以实现在不同的类上。如果有状态的,则应该配成Prototype或Request类型,否则要考虑线程安全问题。 
还是用前面的HelloImpl做测试:   

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public static void main(String[] args) {
        BeanContainer container = BeanContainerFactory.getBeanContainer();
        container.registerClass(InterceptorImpl.class);
        container.registerClass(HelloImpl.class);
        container.addAop(new AopDefine(".*HelloImpl", "sayHello", ".*", InterceptorImpl.class.getName()));
        Hello hello = container.getBeanByType(Hello.class);
        hello.sayHello("abc");
    }



运行结果: 

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sayHello->before
Hello:abc
sayHello->after



当然了,上面的类注册都是手工添加的,实际使用,会增加一个类扫描器自动添加到容器中的。 
再来看一个子容器的类子: 

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public static void main(String[] args) {
        BeanContainer container = BeanContainerFactory.getBeanContainer();
        container.registerClass(InterceptorImpl.class);
        container.registerClass(HelloImpl.class);
        container.registerClass(Hello1Impl.class);
        BeanContainer subContainer = BeanContainerFactory.getBeanContainer("subContainer");
        subContainer.registerClass(HelloHelperImpl.class);
        subContainer.setParent(container);
        container.addAop(new AopDefine(".*Hello1Impl", "sayHello", ".*", InterceptorImpl.class.getName()));
        subContainer.addAop(new AopDefine(".*", "set.*", ".*", InterceptorImpl.class.getName()));
        HelloHelper helloHelper = subContainer.getBeanByType(HelloHelper.class);
        helloHelper.sayHello("abc");
    }



在上面的示例中,创建了一个容器,一个子容器,然后把子容器放在父容器下。 


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public class Hello1Impl implements Hello {
    public void sayHello(String name) {
        System.out.println("Hello:" + name);
    }
}



HelloHelper 

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public interface HelloHelper {
    Hello getHello();

    List<Hello> getHelloList();

    void sayHello(String name);
}



HelloHelperImpl 

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@Singleton
public class HelloHelperImpl implements HelloHelper {
    @Inject
    Hello hello;
    @Inject
    private List<Hello> helloList;

    public void setHelloList(List<Hello> helloList) {
        this.helloList = helloList;
    }

    public void setHello(Hello hello) {
        this.hello = hello;
    }

    public Hello getHello() {
        return <span style=‘line-height: 14.65px; font-family: Consolas, "Bitstream Vera Sans Mono", "Courier New", Courier, monospace; ‘>hello</span>;
    }

    public List<Hello> getHelloList() {
        return helloList;
    }

    public void sayHello(String name) {
        hello.sayHello(name);
    }
}



下面是运行结果: 

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setHello->before
setHello->after
setHelloList->before
setHelloList->after
sayHello->before
Hello:abc
sayHello->after



Jar包大小: 
16,208 tinyioc-0.0.12-SNAPSHOT.jar

TinyIOC

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原文地址:http://www.cnblogs.com/j2eetop/p/4612446.html

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