// VisibleForTesting
static zipkin.Span convert(Span span, Host host) {
Builder zipkinSpan = zipkin.Span.builder();
Endpoint ep =
Endpoint.create(host.getServiceName(), host.getIpv4(), host.getPort().shortValue());
// A zipkin span without any annotations cannot be queried, add special "lc" to
// avoid that.
if (notClientOrServer(span)) {
ensureLocalComponent(span, zipkinSpan, ep);
}
ZipkinMessageListener.addZipkinAnnotations(zipkinSpan, span, ep);
ZipkinMessageListener.addZipkinBinaryAnnotations(zipkinSpan, span, ep);
if (hasClientSend(span)) {
ensureServerAddr(span, zipkinSpan, ep);
}
zipkinSpan.timestamp(span.getBegin() * 1000);
zipkinSpan.duration(span.getAccumulatedMillis() * 1000);
zipkinSpan.traceId(span.getTraceId());
if (span.getParents().size() > 0) {
if (span.getParents().size() > 1) {
log.debug(
"zipkin doesn't support spans with multiple parents. Omitting "
+ "other parents for "
+ span);
}
zipkinSpan.parentId(span.getParents().get(0));
}
zipkinSpan.id(span.getSpanId());
if (StringUtils.hasText(span.getName())) {
zipkinSpan.name(span.getName());
}
return zipkinSpan.build();
}
public static Message<?> addSpanHeaders(TraceKeys traceKeys, Message<?> message, Span span) {
if (span == null) {
if (!message.getHeaders().containsKey(Span.NOT_SAMPLED_NAME)) {
return MessageBuilder.fromMessage(message).setHeader(Span.NOT_SAMPLED_NAME, "").build();
}
return message;
}
Map<String, String> headers = new HashMap<>();
addHeader(headers, Span.TRACE_ID_NAME, Span.toHex(span.getTraceId()));
addHeader(headers, Span.SPAN_ID_NAME, Span.toHex(span.getSpanId()));
if (span.isExportable()) {
addAnnotations(traceKeys, message, span);
Long parentId = getFirst(span.getParents());
if (parentId != null) {
addHeader(headers, Span.PARENT_ID_NAME, Span.toHex(parentId));
}
addHeader(headers, Span.SPAN_NAME_NAME, span.getName());
addHeader(headers, Span.PROCESS_ID_NAME, span.getProcessId());
} else {
addHeader(headers, Span.NOT_SAMPLED_NAME, "");
}
return MessageBuilder.fromMessage(message).copyHeaders(headers).build();
}
private String getParentId(Span span) {
return span.getParents() != null && !span.getParents().isEmpty()
? span.getParents().get(0)
: null;
}