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 MvcResult sendPingWithTraceId(String headerName, Long correlationId, boolean sampling)
throws Exception {
MockHttpServletRequestBuilder request =
MockMvcRequestBuilders.get("/ping")
.accept(MediaType.TEXT_PLAIN)
.header(headerName, Span.toHex(correlationId))
.header(Span.SPAN_ID_NAME, Span.toHex(new Random().nextLong()));
if (!sampling) {
request.header(Span.NOT_SAMPLED_NAME, "true");
}
return this.mockMvc.perform(request).andReturn();
}
private static void addHeader(Map<String, String> headers, String name, Long value) {
if (value != null) {
addHeader(headers, name, Span.toHex(value));
}
}