WReflectionsModule.java

public class WReflectionsModule extends AbstractModule {

  @Override
  public void configure() {
    bind(Reflections.class).toProvider(WReflectionsProvider.class).in(ImmutableSingleton.class);
  }

  public static class WReflectionsProvider implements Provider<Reflections> {

    private static final Log LOG = getLog(WReflectionsProvider.class);
    private static final List<String> PACKAGES_TO_SCAN = List.of("com.kaching", "com.wealthfront");

    @VisibleForTesting
    public static final Thunk<Reflections> REFLECTIONS_THUNK = thunk(() -> {
      StopWatch stopWatch = LOG.getStopWatch("WReflections construction", Log.Level.INFO);
      LOG.info("Pre-instantiation: %s", stopWatch.getElapsedTime());
      FilterBuilder filterBuilder = new FilterBuilder();
      for (String packageToScan : PACKAGES_TO_SCAN) {
        filterBuilder.includePackage(packageToScan);
      }
      Reflections reflections = new Reflections(new ConfigurationBuilder()
          .forPackages(PACKAGES_TO_SCAN.toArray(new String[0]))
          .setScanners(new MethodAnnotationsScanner(), new FieldAnnotationsScanner(), new SubTypesScanner())
          .filterInputsBy(filterBuilder));
      LOG.info("Post-instantiation: %s", stopWatch.getElapsedTime());
      return reflections;
    });

    @Override
    public Reflections get() {
      return REFLECTIONS_THUNK.get();
    }

  }

}