| 1 | import * as Layer from "effect/Layer"; |
| 2 | import * as Tracer from "effect/Tracer"; |
| 3 | |
| 4 | let delegate: Tracer.Tracer | null = null; |
| 5 | |
| 6 | /** |
| 7 | * Points the installed tracer at the exporter `configureClientTracing` just built, |
| 8 | * or at nothing while no exporter is configured. |
| 9 | */ |
| 10 | export function setDelegate(next: Tracer.Tracer | null): void { |
| 11 | delegate = next; |
| 12 | } |
| 13 | |
| 14 | export function hasDelegate(): boolean { |
| 15 | return delegate !== null; |
| 16 | } |
| 17 | |
| 18 | /** |
| 19 | * Installed once when the client runtime is built, before any exporter exists, so |
| 20 | * client spans keep flowing to whatever exporter is configured later on. |
| 21 | */ |
| 22 | export const layer = Layer.succeed( |
| 23 | Tracer.Tracer, |
| 24 | Tracer.make({ |
| 25 | span(options) { |
| 26 | return delegate?.span(options) ?? new Tracer.NativeSpan(options); |
| 27 | }, |
| 28 | }), |
| 29 | ); |