Restlet实战（十一）结合源代码修改Restlet-Spring配置文件

上篇文章结合了Restlet的源码分析了Restlet－spring的配置文件，并提出了相关的问题，本篇将对这一问题做一个测试解答。

 

首先修改一下Spring的配置文件：

 

<bean id="restRoute" class="org.restlet.ext.spring.SpringRouter">
    <property name="attachments">
        <map>
            <entry key="/customers">
                <bean class="org.restlet.ext.spring.SpringFinder">
                    <lookup-method name="createResource" bean="customersResource" />
                </bean>
            </entry>
            <entry key="/customers/{customerId}">
                <bean class="org.restlet.ext.spring.SpringFinder">
                    <lookup-method name="createResource" bean="customerResource" />
                </bean>
            </entry>
            <entry key="/users">
                <bean class="com.mycompany.restlet.application.UserApplication"/>
            </entry>
        </map>
    </property>
</bean>

 

除了配置customer外，还配置了一个跟User相关的Application：

 

public class UserApplication extends Application{
    @Override
    public synchronized Restlet createRoot() {
        Router router = new Router(getContext());

        router.attach("/{userId}", UserResource.class);
        router.attach("/{userId}/orders", UserOrdersResource.class);
        return router;
    }
}

 

为了测试更加的清晰，不在Customer相关类上面做修改了，另外建立两个资源文件：UserResource和UserOrdersResource，对应的URL应该分别是：/users/{userId}和/users/{userId}/orders,第一个URL意思是根据id查询得到某个user，而第二个则是查询得到某个user对应的所有的order。

 

public class UserResource extends Resource {
    String userId;

    public UserResource(Context context, Request request, Response response) {
        super(context, request, response);
        userId = (String) request.getAttributes().get("userId");
        getVariants().add(new Variant(MediaType.TEXT_PLAIN));
    }

    @Override
    public Representation represent(Variant variant) {
        String userMsg = "current user id is " + userId;
        Representation representation = new StringRepresentation(userMsg,
                MediaType.TEXT_PLAIN);
        return representation;
    }

}

 

public class UserOrdersResource extends Resource {
    String userId;

    public UserOrdersResource(Context context, Request request, Response response) {
        super(context, request, response);
        getVariants().add(new Variant(MediaType.TEXT_PLAIN));
        userId = (String) request.getAttributes().get("userId");
    }

    @Override
    public Representation represent(Variant variant) {
        String userMsg = "get all orders for user whose id is: " + userId;
        Representation representation = new StringRepresentation(userMsg,
                MediaType.TEXT_PLAIN);
        return representation;
    }
}

 

需要注意的是，上面两个资源是直接attach到Application，而不是之前文章讲的那样由SpringFinder接管，所以，之前文章强调一些规则，如需要有一个无参的构造函数，一个init方法等，就不适用于上述的两个资源的定义。 

 

没有别的代码，来测试一下吧，打开浏览器，输入http://localhsot:8080/restlet/resources/users/1后，页面会显示：

 

current user id is 1

而输入http://localhost:8080/restlet/resources/users/1/orders 后，页面会显示：

 

get all orders for user whose id is: 1

 

我们接着测试，如果value是String，会怎么样：