import { ExportResult } from '@opentelemetry/core';
import { Span as OTelSpan, SpanProcessor, ReadableSpan as OTelReadableSpan, SpanExporter } from '@opentelemetry/sdk-trace-base';
import { Context } from '@opentelemetry/api';
import { TraceInfo } from '../core/entities/trace_info';
import { MlflowClient } from '../clients';
export declare class MlflowSpanProcessor implements SpanProcessor {
    private _exporter;
    constructor(exporter: SpanExporter);
    /**
     * Called when a {@link Span} is started, if the `span.isRecording()`
     * returns true.
     * @param span the Span that just started.
     */
    onStart(span: OTelSpan, _parentContext: Context): void;
    /**
     * Called when a {@link ReadableSpan} is ended, if the `span.isRecording()`
     * returns true.
     * @param span the Span that just ended.
     */
    onEnd(span: OTelReadableSpan): void;
    /**
     * Update the trace info with the span end time and status.
     * @param trace The trace to update
     * @param span The span to update the trace with
     */
    updateTraceInfo(traceInfo: TraceInfo, span: OTelReadableSpan): void;
    /**
     * Shuts down the processor. Called when SDK is shut down. This is an
     * opportunity for processor to do any cleanup required.
     */
    shutdown(): Promise<void>;
    /**
     * Forces to export all finished spans
     */
    forceFlush(): Promise<void>;
}
export declare class MlflowSpanExporter implements SpanExporter {
    private _client;
    private _pendingExports;
    constructor(client: MlflowClient);
    export(spans: OTelReadableSpan[], _resultCallback: (result: ExportResult) => void): void;
    /**
     * Export a complete trace to the MLflow backend
     * Step 1: Create trace metadata via StartTraceV3 endpoint
     * Step 2: Upload trace data (spans) via artifact repository pattern
     */
    private exportTraceToBackend;
    /**
     * Force flush all pending trace exports.
     * Waits for all async export operations to complete.
     */
    forceFlush(): Promise<void>;
    /**
     * Shutdown the exporter.
     * Waits for all pending exports to complete before shutting down.
     */
    shutdown(): Promise<void>;
}