/** Sleuth host corresponds to annotation/binaryAnnotation.host in zipkin. */
@Test
public void annotationsIncludeHost() {
span.log("http/request/retry");
span.tag("spring-boot/version", "1.3.1.RELEASE");
io.zipkin.Span result = ZipkinMessageListener.convert(span, host);
assertThat(result.annotations.get(0).endpoint).isEqualTo(endpoint);
assertThat(result.binaryAnnotations.get(0).endpoint)
.isEqualTo(result.annotations.get(0).endpoint);
}
/** Sleuth timestamps are millisecond granularity while zipkin is microsecond. */
@Test
public void convertsTimestampAndDurationToMicroseconds() {
long start = System.currentTimeMillis();
span.log("http/request/retry"); // System.currentTimeMillis
io.zipkin.Span result = ZipkinMessageListener.convert(span, host);
assertThat(result.timestamp).isEqualTo(span.getBegin() * 1000);
assertThat(result.duration).isEqualTo((span.getEnd() - span.getBegin()) * 1000);
assertThat(result.annotations.get(0).timestamp)
.isGreaterThanOrEqualTo(start * 1000)
.isLessThanOrEqualTo(System.currentTimeMillis() * 1000);
}
// TODO: "unknown" bc process id, documented as not nullable, is null in some tests.
@Test
public void nullProcessIdCoercesToUnknownServiceName() {
MilliSpan noProcessId = MilliSpan.builder().traceId(1L).name("parent").remote(true).build();
io.zipkin.Span result = ZipkinMessageListener.convert(noProcessId, host);
assertThat(result.binaryAnnotations)
.containsOnly(BinaryAnnotation.create("lc", "unknown", endpoint));
}
/**
* In zipkin, the service context is attached to annotations. Sleuth spans that have no
* annotations will get an "lc" one, which allows them to be queryable in zipkin by service name.
*/
@Test
public void spanWithoutAnnotationsLogsComponent() {
io.zipkin.Span result = ZipkinMessageListener.convert(span, host);
assertThat(result.binaryAnnotations).hasSize(1);
assertThat(result.binaryAnnotations.get(0))
.isEqualToComparingFieldByField(
BinaryAnnotation.create("lc", span.getProcessId(), endpoint));
}