import { Span } from './spans';
import { Trace } from './traces';
/**
 * Interface for processing spans.
 */
export interface TracingProcessor {
    /**
     * Called when a trace is started.
     *
     * @param trace - The trace that started.
     */
    onTraceStart(trace: Trace): void;
    /**
     * Called when a trace is finished.
     *
     * @param trace - The trace that started.
     */
    onTraceEnd(trace: Trace): void;
    /**
     * Called when a span is started.
     *
     * @param span - The span that started.
     */
    onSpanStart(span: Span<any>): void;
    /**
     * Called when a span is finished. Should not block or raise exceptions.
     *
     * @param span - The span that finished.
     */
    onSpanEnd(span: Span<any>): void;
    /**
     * Called when the application stops.
     */
    shutdown(): void;
    /**
     * Forces an immediate flush of all queued spans/traces.
     */
    forceFlush(): void;
}
/**
 * Exports traces and spans. For example, could log them or send them to a backend.
 */
export interface TracingExporter {
    /**
     * Exports a list of traces and spans.
     *
     * @param items - The items to export.
     */
    export(items: Array<Trace | Span<any>>): void;
}