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Posted to pr@flagon.apache.org by "brucearctor (via GitHub)" <gi...@apache.org> on 2026/10/11 15:10:42 UTC
[PR] feat(userale): pluggable LogExporter architecture, unified headers, and ProtoJsonExporter (flagon)
brucearctor opened a new pull request, #184:
URL: https://github.com/apache/flagon/pull/184
## Summary
Implements the pluggable exporter architecture and canonical Protobuf v1 JSON wire exporter while preserving 100% backward compatibility with the in-memory log model (`userale.filter`, `userale.map`, `addCallbacks`, and Apache Flagon Distill):
- **Unified Header Builder (`buildHeaders`)**: Fixes header construction inconsistency between `sendOnInterval` and `sendOnClose` (`pagehide`), ensuring callback-based `authHeader` (`registerAuthCallback`), `registerHeadersCallback`, and `x-api-key` are applied identically across all HTTP transmissions (Closes #133).
- **Pluggable `LogExporter` Interface & Factory**: Decouples batching/lifecycle in `sendLogs.ts` from serialization and transport via `LogExporter`, `HttpJsonExporter`, `WebSocketExporter`, `createExporter(config)`, `config.exporter`, and `config.exporterType` / `data-exporter` (Closes #139).
- **48 KiB `keepalive` Chunking**: Splits oversized `pagehide` batches via `chunkLogsForKeepalive` so browser `fetch(..., { keepalive: true })` requests do not silently fail the 64 KiB browser limit.
- **Canonical Protobuf v1 JSON Exporter (`ProtoJsonExporter`)**: Serializes raw, interval, and custom logs into canonical Proto3 JSON conforming to `apache.flagon.userale.v1.LogBatch` (`proto/apache/flagon/userale/v1/log.proto`), validated in Jest contract tests via `@bufbuild/protobuf` `fromJson(LogBatchSchema, ...)` without bundling the runtime into `flagon-userale` (Closes #142, Closes #143).
Closes #133
Closes #139
Closes #142
Closes #143
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Re: [PR] feat(userale): pluggable LogExporter architecture, unified headers, and ProtoJsonExporter (flagon)
Posted by "brucearctor (via GitHub)" <gi...@apache.org>.
brucearctor merged PR #184:
URL: https://github.com/apache/flagon/pull/184
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