implement "b3 single" header format
codefromthecrypt opened this issue · 1 comments
codefromthecrypt commented
As discussed on openzipkin/b3-propagation#21 and first implemented here: https://github.com/openzipkin/brave/blob/master/brave/src/main/java/brave/propagation/B3SingleFormat.java https://github.com/openzipkin/brave/blob/master/brave/src/test/java/brave/propagation/B3SingleFormatTest.java
Let's support at least reading "b3" header from a single string, most commonly traceid-spanid-1
It would also be nice to support optionally writing this, especially in message providers or others with constrained environments.
Brave currently has a property like this, but its name could change with feedback:
/**
* When true, only writes a single {@link B3SingleFormat b3 header} for outbound propagation.
*
* <p>Use this to reduce overhead. Note: normal {@link Tracing#propagation()} is used to parse
* incoming headers. The implementation must be able to read "b3" headers.
*/
public Builder b3SingleFormat(boolean b3SingleFormat) {
this.b3SingleFormat = b3SingleFormat;
return this;
}