初试Guice

最近有空试用了一下Guice,感觉还是比较小巧的，在上面做了个类似Tapestry的Configuration，利用它可以实现类似扩展点的功能。 (可以参考http://tapestry.apache.org/tapestry5/tapestry- ioc/configuration.html)
另外关于网上代码和XML的配置的问题，个人认为不是问题。基于代码的配置就象一个核，如果你喜欢基于XML的配置，只要自己写一个模块，读取XML并使用其中的信息再用基于代码的配置去配置即可，只是基于使用@Inject Annotation 的地方稍微难处理点，但也只需要动态生成类也可以解决这个问题。


使用的时候参考以下这个测试用例:

public class GuiceTest extends TestCase {
    public static class ContributorUsingContributorClass extends
            ContributableModule {
        @Override
        protected void configure() {
            contribute(new AbstractContributor() {
                @Inject
                @ConfigFor(AnotherInterface.class)
                OrderedConfiguration<string></string> orderedConfiguration;
                @Inject
                @ConfigFor(AnotherInterface.class)
                Configuration<string></string> unorderedConfiguration;
                @Inject
                @ConfigFor(Service.class)
                MappedConfiguration configuration;

                @Inject
                public void contribute() {
                    configuration.add("abcd", new Runnable() {
                        public void run() {
                        }
                    });
                    unorderedConfiguration.add("abc");
                    orderedConfiguration.add("my", "abc");
                }
            });
        }
    }

    public void testClient() {
        Injector injector = Guice.createInjector(new MyModule());
        Client client = injector.getInstance(Client.class);
        MockService mock = (MockService) injector.getInstance(Service.class);
        client.go();
        assertTrue(mock.isGone());
    }

    public void testConfigurationThroughContributorClass() {
        Injector injector = Guice.createInjector(new MyModule(),
                new ContributorUsingContributorClass());
        MockService mock = (MockService) injector.getInstance(Service.class);
        Map map = mock.getConfigMap();

        assertNotNull(map);
        assertEquals(1, map.size());
    }

    public void testUnorderedConfiguration() {
        Injector injector = Guice.createInjector(new MyModule(),
                new ContributorUsingContributorClass());
        MockService mock = (MockService) injector.getInstance(Service.class);
        Collection<string></string> config = mock.config;

        assertNotNull(config);
        assertEquals(1, config.size());
        assertEquals("[abc]", config.toString());
    }

    public void testOrderedConfiguration() {
        Injector injector = Guice.createInjector(new MyModule(),
                new ContributorUsingContributorClass());
        MockService mock = (MockService) injector.getInstance(Service.class);
        Collection<string></string> config = mock.orderedConfig;

        assertNotNull(config);
        assertEquals(1, config.size());
        assertEquals("[abc]", config.toString());
    }