@ydbjs/topic/dist/writer/types.d.ts

YDB Topics client for publish-subscribe messaging. Provides at-least-once delivery, exactly-once publishing, FIFO guarantees, and scalable message processing for unstructured data.

import type { RetryConfig } from '@ydbjs/retry';
import type { CompressionCodec } from '../codec.js';
import type { TX } from '../tx.js';
export type ThroughputSettings = {
    maxBufferBytes: bigint;
    flushIntervalMs: number;
    maxInflightCount: number;
};
export type TopicWriterOptions = {
    tx?: TX;
    topic: string;
    codec?: CompressionCodec;
    producer?: string;
    updateTokenIntervalMs?: number;
    maxBufferBytes?: bigint;
    maxInflightCount?: number;
    flushIntervalMs?: number;
    retryConfig?(signal: AbortSignal): RetryConfig;
    onAck?: (seqNo: bigint, status?: 'skipped' | 'written' | 'writtenInTx') => void;
};
export interface TopicWriter extends AsyncDisposable {
    write(payload: Uint8Array, extra?: {
        seqNo?: bigint;
        createdAt?: Date;
        metadataItems?: Record<string, Uint8Array>;
    }): bigint;
    flush(): Promise<bigint | undefined>;
    close(): Promise<void>;
    destroy(reason?: Error): void;
}
export interface TopicTxWriter {
    write(payload: Uint8Array, extra?: {
        seqNo?: bigint;
        createdAt?: Date;
        metadataItems?: Record<string, Uint8Array>;
    }): bigint;
    flush(): Promise<bigint | undefined>;
    close(): Promise<void>;
    destroy(): void;
}
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