How to add the automatically created spans to already existing context...I have tried Span.storeInContext() and that seems to not work..

[GokulShrikanth]

It is possible to store the automatically created spans inside a context?...
Span span = Span.current(); Span.storeInContext(ParentContext);

And this seems to be not working...How am I supposed to use this function when the span is created automatically?

[jkwatson]

The context is immutable, so you'll need to use the return value of Span.storeInContext.

But, what are you trying to do with this code? It seems strange that you would store a span in the parent context, when it's already in the current context.

[jkwatson]

Can you share some code? I suspect you just need to write the propagation code (ie getter) and hook it up to the nats request. The propagator will handle the context then.

[GokulShrikanth]

I am trying to solve this by partially using manual instrumentation...so from service A the context is sent, I am trying to make all the spans in service B to be a added on the same context as A

[GokulShrikanth]

TextMapSetter<JsonObject> setter  = new TextMapSetter<>() {
 @Override
  public void set(JsonObject carrier, String key, String value) {
    // Insert the context as Header
  carrier.put(key, value);
   }
  };

JsonObject context = new JsonObject();
 OpenTelemetry openTelemetry = GlobalOpenTelemetry.get();
 openTelemetry.getPropagators().getTextMapPropagator().inject(Context.current(), context, setter);
 JsonObject requestData = request.asJsonConnectorRequestObject().put("context",context);
 Logger.JOB_LOGGER.info("requestData " + requestData);`

Through NATS, I am able to send the context this way...and in the other service

JsonObject context= receivedBody.getJsonObject("context");
  Logger.PLATFORM_LOGGER.info(NATS| | context " + context);
  OpenTelemetry openTelemetry = GlobalOpenTelemetry.get();
  Tracer tracer = openTelemetry.getTracer("connector");
  
 TextMapGetter<JsonObject> getter = new TextMapGetter<>() {
  @Override
   public String get(JsonObject carrier, String key) {
   if (carrier.containsKey(key)) {
        return carrier.getValue(key).toString();
    }
        return null;
    }
  @Override
   public Iterable<String> keys(JsonObject carrier) {
   return carrier.fieldNames();
   }
};

 Context extractedContext = openTelemetry.getPropagators().getTextMapPropagator()
                                .extract(Context.current(), context, getter);
  Span span = tracer.spanBuilder("Connector Call").setParent(extractedContext).startSpan();

I am able to create this span under the context that I want...but the automatically generated ones aren't under this context...If there is a way to make the auto ones.. So is there a way to make the automatically generated ones be under this context?

[jkwatson]

I think you can just do

try (Scope scope = span.makeCurrent()) {
  // application code goes here
} finally {
  span.end();
}

[GokulShrikanth]

Thank you so much...This solved it