hertzsprung

interface Queue {
        Message read();
        void delete(Message message);
        void deleteAll() default {
                Message message;
                while ((message = read()) != null) {
                        delete(message);
                }
        }
}

hertzsprung

interface BatchQueue extends Queue {
        void setBatchSize(int batchSize);
        void deleteAll() default {
                setBatchSize(100);
                Queue.super.deleteAll();
        }
}

hertzsprung

interface FastQueue extends Queue {
        void deleteAll();
}

hertzsprung

public class BlogAggregatorUnitTest {
    @Rule public final JUnitRuleMockery context = new JUnitRuleMockery();
    private final BlogResource alicesBlogResource = context.mock(BlogResource.class, "Alice's Blog");
    private final BlogResource bobsBlogResource = context.mock(BlogResource.class, "Bob's Blog");
	
    @Test public void providesFeedContainingMostRecentArticleFromEachBlog() {
        context.checking(new Expectations() {{
            allowing(alicesBlogResource).get(); will(returnValue(alicesBlog));
            allowing(bobsBlogResource).get(); will(returnValue(bobsBlog));
        }});

hertzsprung

@Path("/")
public interface BlogResource {
	@GET @Produces(APPLICATION_JSON) Blog get();
}

hertzsprung

public class BlogAggregatorIntegrationTest {
    @Rule public JUnitRuleMockery context = new JUnitRuleMockery() {{
        setThreadingPolicy(new Synchroniser());
    }};
    private final BlogResource alicesBlogResource = context.mock(BlogResource.class, "Alice's Blog");
    private final BlogResource bobsBlogResource = context.mock(BlogResource.class, "Bob's Blog");
	
    private final JerseyTest alicesServer = aJerseyTest().withPort(9998)
            .addResource(alicesBlogResource).build();
	

hertzsprung

enum FilterType { ... }

interface Filter {
    Response filter(Request request);
}

class RoutingFilter {
    private final Map<FilterType, Filter> routes;

    public RoutingFilter(Map<FilterType, Filter> routes) {

hertzsprung

G 3 --- 2&6 3 --- | ---------------- | 5 (*) ---------- | ---------------- |
D ----------- 2++ | 2&6 -- 3 2++ 2&6 | ---------- 2++ - | 5 -------------- |
A --------------- | ---------------- | ------ 1&5 --- 3 | ---------------- |
E --------------- | ---------------- | ---------------- | ---------------- |

All notes harmonics
2++: harmonic ~2/3rds between 2nd and 3rd fret
x&y: hold fret x, harmonic on fret y

(*) alternatively, 2++ on A string

hertzsprung

@Configuration public class MyCollaboratorConfig {
    @Bean public MyCollaborator myCollaborator() {
        return new MyRealCollaborator();
    }
}

hertzsprung

@Configuration
@Import(MyCollaboratorConfig.class)
public class MyServiceConfig {
    @Autowired private MyCollaboratorConfig collaboratorConfig;

    @Bean public MyService myService() {
        return new MyRealService(collaboratorConfig.myCollaborator());
    }
}