OpenTelemetryServerSSEOptions

type OpenTelemetryServerSSEOptions = OpenTelemetryServerTransportOptions<
  EventStreamHandle<unknown>
>;

Set on sse in OpenTelemetryServerOptions. It has no fields of its own: enabled, startSpanHook, requestHook and responseHook come from OpenTelemetryServerTransportOptions.

• responseHook(span, stream, req) runs once the stream has opened, before the span records sse.connected. stream is the EventStreamHandle the transport returned; req is the original HttpRequest.

• SSE is traced at connection level. After startup the span stays open until stream.closed settles, and records sse.connected, then one of sse.closed (server EOF), sse.aborted (stream.close() or a caller abort of the open stream whose reason is not TimeoutError; the span still ends without error), or sse.error (including an abort whose reason is TimeoutError, which ends the span ERROR). No per-event spans are created.

• A non-2xx handshake is observed as a connection failure: the span ends ERROR and, with a logger, one WARN is emitted whatever the response body.

Pass { enabled: false } to skip SSE instrumentation. Span hooks run only when a tracer is supplied.