How to use

getDefaultInstance

method

in

com.nike.wingtips.tags.NoOpHttpTagStrategy

/**
 * @return {@link NoOpHttpTagStrategy#getDefaultInstance()}.
 */
protected HttpTagAndSpanNamingStrategy<HttpServletRequest, HttpServletResponse> getNoOpTagStrategy() {
  return NoOpHttpTagStrategy.getDefaultInstance();
}

WingtipsRequestSpanCompletionAsyncListener(
  TracingState originalRequestTracingState,
  HttpTagAndSpanNamingStrategy<HttpServletRequest, HttpServletResponse> tagAndNamingStrategy,
  HttpTagAndSpanNamingAdapter<HttpServletRequest, HttpServletResponse> tagAndNamingAdapter
) {
  this.originalRequestTracingState = originalRequestTracingState;
  // We should never get a null tag strategy or tag adapter in reality, but just in case we do, default to
  //      the no-op impls.
  if (tagAndNamingStrategy == null) {
    tagAndNamingStrategy = NoOpHttpTagStrategy.getDefaultInstance();
  }
  if (tagAndNamingAdapter == null) {
    tagAndNamingAdapter = NoOpHttpTagAdapter.getDefaultInstance();
  }
  this.tagAndNamingStrategy = tagAndNamingStrategy;
  this.tagAndNamingAdapter = tagAndNamingAdapter;
}

@Test
public void getDefaultInstance_returns_DEFAULT_INSTANCE() {
  // expect
  assertThat(NoOpHttpTagStrategy.getDefaultInstance()).isSameAs(NoOpHttpTagStrategy.DEFAULT_INSTANCE);
}

@Test
public void getNoOpTagStrategy_works_as_expected() {
  // given
  RequestTracingFilter filter = new RequestTracingFilter();
  // expect
  assertThat(filter.getNoOpTagStrategy())
    .isNotNull()
    .isSameAs(NoOpHttpTagStrategy.getDefaultInstance());
}

@Test
public void constructor_uses_default_NoOpHttpTagStrategy_if_passed_null_tag_strategy() {
  // when
  WingtipsRequestSpanCompletionAsyncListener impl =
    new WingtipsRequestSpanCompletionAsyncListener(tracingState, null, tagAndNamingAdapterMock);
  // then
  assertThat(impl.tagAndNamingStrategy).isSameAs(NoOpHttpTagStrategy.getDefaultInstance());
  assertThat(impl.originalRequestTracingState).isSameAs(tracingState);
  assertThat(impl.tagAndNamingAdapter).isSameAs(tagAndNamingAdapterMock);
}