@ydbjs/topic/dist/codec.js

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 * as zlib from 'node:zlib';
import { Codec } from '@ydbjs/api/topic';
export function getCodec(codec) {
    switch (codec) {
        case Codec.RAW:
            return {
                codec: Codec.RAW,
                compress: (payload) => payload,
                decompress: (payload) => payload,
            };
        case Codec.GZIP:
            return {
                codec: Codec.GZIP,
                compress: (payload) => zlib.gzipSync(payload),
                decompress: (payload) => zlib.gunzipSync(payload),
            };
        case Codec.ZSTD:
            return {
                codec: Codec.ZSTD,
                compress: (payload) => zlib.zstdCompressSync(payload),
                decompress: (payload) => zlib.zstdDecompressSync(payload),
            };
        default:
            throw new Error(`Unsupported codec: ${codec}`);
    }
}
export const defaultCodecMap = new Map([
    [Codec.RAW, getCodec(Codec.RAW)],
    [Codec.GZIP, getCodec(Codec.GZIP)],
    [Codec.ZSTD, getCodec(Codec.ZSTD)],
]);
export const RAW_CODEC = getCodec(Codec.RAW);
export const GZIP_CODEC = getCodec(Codec.GZIP);
export const ZSTD_CODEC = getCodec(Codec.ZSTD);
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