import { SpanExporter, ReadableSpan, SpanProcessor } from '@opentelemetry/sdk-trace-base';
import { ExportResult } from '@opentelemetry/core';
import { BackendProvider } from '../types';
export declare class JsonSpanExporter implements SpanExporter {
    private readonly dataProvider;
    /**
     * Serialize trace DB writes: (1) avoids overlapping `createTraces` on the single pooled
     * connection, (2) ensures every OTEL export callback runs (lock+queue dropped callbacks).
     * ALS on `Database` does not order OTEL work vs in-flight Knex commits — deferral below does.
     */
    private exportChain;
    constructor(dataProvider: BackendProvider<unknown>);
    /**
     * Export spans.
     * @param spans
     * @param resultCallback
     */
    export(spans: ReadableSpan[], resultCallback: (result: ExportResult) => void): void;
    /**
     * Shutdown the exporter.
     */
    shutdown(): Promise<void>;
    /**
     * Exports any pending spans in exporter
     */
    forceFlush(): Promise<void>;
    /**
     * converts span info into more readable format
     * @param span
     */
    private exportInfo;
    private persistSpans;
}
export declare const JsonSpanProcessor: (dataProvider: BackendProvider<unknown>) => SpanProcessor;