@Override Span joinSpan(SpanId context) { if (!supportsJoin()) return nextSpan(context); // If the sampled flag was left unset, we need to make the decision here if (context.sampled() == null) { return Brave.toSpan(context.toBuilder() .sampled(sampler().isSampled(context.traceId)) .build()); } else if (context.sampled()) { // We know an instrumented caller initiated the trace if they sampled it return Brave.toSpan(context).setShared(); } else { return Brave.toSpan(context); } } }
@Override Span joinSpan(SpanId spanId) { TraceContext context = toTraceContext(spanId); return Brave.toSpan(toSpanId(tracer.joinSpan(context).context())); } }
@Override Span nextSpan(@Nullable SpanId maybeParent) { brave.Span span = maybeParent != null ? tracer.newChild(toTraceContext(maybeParent)) : tracer.newTrace(); return Brave.toSpan(toSpanId(span.context())); }
@Override Span nextSpan(@Nullable SpanId maybeParent) { // Generates a new 64-bit ID, taking care to dodge zero which can be confused with absent long newSpanId = randomGenerator().nextLong(); while (newSpanId == 0L) { newSpanId = randomGenerator().nextLong(); } if (maybeParent == null) { // new trace return Brave.toSpan(SpanId.builder() .traceIdHigh(traceId128Bit() ? nextTraceIdHigh(randomGenerator()) : 0L) .traceId(newSpanId) .spanId(newSpanId) .sampled(sampler().isSampled(newSpanId)) .build()); } return Brave.toSpan(maybeParent.toBuilder() .parentId(maybeParent.spanId) .spanId(newSpanId) .build()); }