feat: Add AsyncConfig for the async SDK client - #471
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Reviewed by Cursor Bugbot for commit 23ca0b6. Configure here.
…interface Mirror how the sync Config types event_processor_class against the EventProcessor interface. Add an AsyncEventProcessor ABC to interfaces and reference it directly instead of the concrete implementation, which also removes the aiohttp-avoiding TYPE_CHECKING import.
Extract the default base/events/stream LaunchDarkly URIs into named constants in ldclient.config and reference them from both Config and AsyncConfig, so the two clients can't silently drift to different default endpoints. Also type update_processor_class against the AsyncUpdateProcessor interface rather than the sync UpdateProcessor.
Match sync Config, which always defaults to an in-memory store when none is provided, so callers and the async client can rely on a non-null feature store.
jsonbailey
marked this pull request as ready for review
July 28, 2026 16:15
keelerm84
approved these changes
Jul 28, 2026
is_alive is never called on the async path; it was only mirrored from the sync UpdateProcessor's BackgroundOperation base. The async interface is defined fresh, so it omits the vestigial method.
Declares a coroutine that flushes buffered events and waits for delivery, returning whether it completed within the given timeout. Mirrors .NET's FlushAndWait; the sync EventProcessor has no equivalent.
keelerm84
approved these changes
Jul 29, 2026
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Adds the full
AsyncConfigclass toldclient/async_config.py, building on the previously-mergedAsyncBigSegmentsConfigseed (#462). This is a stacked-PR slice of the async Python SDK epic (SDK-60), unblocked now that #463 mergedAsyncHook/AsyncPlugin.AsyncConfigmirrors the syncConfigsurface for the async client: base/events/stream URIs, streaming vs. polling, event buffering, private attributes, big segments, hooks, plugins, HTTP config, application metadata, and the experimental data system config. The concreteAsyncEventProcessoris imported only underTYPE_CHECKINGto keep aiohttp out of the runtime import graph.This is self-contained and reviewable on its own. It unblocks the upcoming async FDv1 polling (PR 7) and async event processor (PR 8), both of which import the full
AsyncConfig.The public
AsyncConfig(andAsyncBigSegmentsConfig) carry an experimental.. caution::note — this API may change without notice and is not yet production-ready.Tracked internally: SDK-2768
Note
Medium Risk
Large new experimental configuration surface touches networking, events, and data-source wiring for the async client, though behavior is additive and sync Config changes are limited to shared constants.
Overview
Adds
AsyncConfiginldclient/async_config.pysoAsyncLDClientcan be configured with the same knobs as syncConfig: endpoints, streaming/polling, events, privacy, big segments, hooks/plugins, HTTP, payload filtering, and experimental data-system settings. It wires inAsyncFeatureStore(defaultAsyncInMemoryFeatureStore),AsyncHook/AsyncPlugin, and factory hooks forAsyncUpdateProcessorandAsyncEventProcessor, with experimental.. caution::on the public API.Sync
Confignow reuses sharedDEFAULT_*_URIconstants instead of inline URL literals.interfaces.pygains experimentalAsyncUpdateProcessorandAsyncEventProcessor(asyncstop, plusflush_and_waiton the event processor) for upcoming async polling and event delivery.Reviewed by Cursor Bugbot for commit 3303a25. Bugbot is set up for automated code reviews on this repo. Configure here.