Keep the loader up while a grouped channel list fetches its first page - #6679
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gpunto merged 3 commits intoSep 4, 2026
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…rst page (develop) Port of #6674 to develop. Opening a grouped channel list with nothing cached for that group showed the empty state ("no channels") for the whole duration of the first queryGroupedChannels round trip, instead of the loading indicator. Standard channel lists hold the loader until the network answers. loadOfflineGroupedChannels() cleared the first-page loading flag unconditionally, so a cache miss moved channelsStateData from Loading to OfflineNoResults while the request was still in flight, and nothing raised it again. Raise it in the request listener instead, for each named first-page group, guarded on !hasCompletedAQuery && getChannels().isNullOrEmpty(). Both halves matter: without the marker a settled empty group returns to a spinner on every reconnect, since SyncManager recovers grouped lists through this listener; without the emptiness check a request hides cached channels behind a spinner. A failure does not count as completion, so a retry raises the loader again, matching queryOffline for a standard list. Recovery of a group whose first page failed does differ from standard, which never raises there because queryFirstPage bypasses the listener; grouped showing a spinner while the retry runs is the more accurate of the two. Clear the flag only once there is something to show, and end the load on failure and for a group the response omits. Only the query-channels path is affected. The two channel-logic implementations on this branch, ChannelLogicImpl and ChannelLogicLegacyImpl, are the chat screen and are untouched here; that half is tracked separately in AND-1462. Differences from the v6 version are mechanical: the files live under stream-chat-android-client rather than stream-chat-android-state, ChannelsStateData is imported from client.api.state, and QueryChannelsStateLogic takes an extra isLocalUnreadCountEnabled parameter that the test harness now passes. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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gpunto
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September 2, 2026 07:28
WalkthroughGrouped channel queries now track first-page loading per group. The listener starts and finishes these loads for first-page requests, failures, and omitted groups. Query logic preserves loading during cache misses and validates Loading-to-OfflineNoResults transitions. ChangesGrouped channel loading
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The PR keeps grouped channel lists in a loading state during uncached first-page fetches, fixing the premature empty state. A bounded risk remains if overlapping requests for the same group cause the loader to clear before the latest request finishes; merge is reasonable with owner awareness and follow-up coverage. Sequence Diagram(s)sequenceDiagram
participant QueryGroupedChannelsListenerState
participant QueryChannelsLogic
participant QueryChannelsMutableState
QueryGroupedChannelsListenerState->>QueryChannelsLogic: startLoadingFirstPageIfNeverLoaded()
QueryChannelsLogic->>QueryChannelsMutableState: setLoadingFirstPage(true)
QueryGroupedChannelsListenerState->>QueryChannelsLogic: finishFirstPageLoad(completed)
QueryChannelsLogic->>QueryChannelsMutableState: setLoadingFirstPage(false)
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In
`@stream-chat-android-client/src/main/java/io/getstream/chat/android/client/internal/state/plugin/logic/querychannels/internal/QueryChannelsLogic.kt`:
- Line 199: Update QueryChannelsLogic.finishFirstPageLoad and the corresponding
QueryGroupedChannelsListenerState callbacks to track each named first-page
request, ensuring an older overlapping completion cannot clear the shared
loading state while a newer request remains active. Preserve loading until all
in-flight first-page requests finish, and add a deterministic test covering
overlapping same-group calls and their completion order.
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stream-chat-android-client/src/main/java/io/getstream/chat/android/client/internal/state/plugin/listener/internal/QueryGroupedChannelsListenerState.ktstream-chat-android-client/src/main/java/io/getstream/chat/android/client/internal/state/plugin/logic/querychannels/internal/QueryChannelsLogic.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/internal/state/plugin/listener/internal/QueryGroupedChannelsListenerStateTest.ktstream-chat-android-client/src/test/java/io/getstream/chat/android/client/internal/state/plugin/logic/querychannels/internal/QueryChannelsLogicGroupedTest.kt
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Nothing dedupes concurrent grouped queries, so two first pages for one group can be in flight together. The loading flag is shared, so the earlier completion ends the load while the later request is still running, and the list shows the empty state for that window. That window is the behaviour this branch removes elsewhere, narrowed to the overlap, and it recovers on its own once the later request answers. Gating the clear on an in-flight count would close it, but the count is incremented in doOnStart and decremented in doOnResult, and DoOnResultCall.cancel cancels the scope the consumer runs in. A leaked start would never return to zero, so the loader would stop clearing at all, including on a later success. The test records that trade so a future count cannot land silently.
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LGTM. One scope question and three small things inline, none blocking.
- Name the omitted-group branch as the guard it is. The server answers every requested group, with an empty channel list when the group has nothing, so it is expected to be a no-op; it stays because a group the response left out would never reach applyGroupedResult and its loader would never come down. - Note in KDoc that an explicit Call.cancel between the raise and the result leaves the group on the loader until a later grouped query finishes. Cancelling the calling coroutine or its scope still runs the result listener, and nothing in the SDK cancels this call. - Set hasCompletedAQuery inside groupedResultMutex, matching applyGroupedResult, so both writers hold the lock. - Drop a test that duplicated the stub, call and assertion of the one below it.
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September 4, 2026 09:20
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Goal
A grouped channel list with nothing cached for a group showed the empty state ("no channels") for the whole first
queryGroupedChannelsround trip instead of the loader. Standard channel lists do not behave this way: they hold the loader until the network answers.Port of #6674 to develop.
Part of AND-1460
Implementation
loadOfflineGroupedChannelscleared the first-page loading flag unconditionally, so a cache miss movedchannelsStateDatafromLoadingtoOfflineNoResultswhile the request was still in flight, and nothing raised it again:onQueryGroupedChannelsRequestonly captured the query config.!hasCompletedAQuery && getChannels().isNullOrEmpty()and both halves are load-bearing. Without the marker a settled empty tab returns to a spinner on every reconnect, sinceSyncManagerrecovers grouped lists through a cursor-less request that reaches this listener. Without the emptiness check a request hides channels the offline read just loaded from cache, becauseChannelsStateDatareportsLoadingwhenever the flag is set regardless of content.hasCompletedAQueryis needed because state alone cannot express the difference: a group that has never loaded and one that loaded and is genuinely empty both hold an empty channel map.queryOfflinefor a standard list. An omitted group would count, since the server answered, but that branch is a guard rather than a live path: the server returns every requested group, with an empty channel list when the group has nothing. It stays because such a group would never reachapplyGroupedResultand the loader it raised would never come down.applyGroupedResult; ending it initialises the channel map as well as clearing the flag, becauseChannelsStateDatareportsLoadingwhile channels are still null.Scope is limited to grouped lists: the new methods are called only from
QueryGroupedChannelsListenerState, andloadOfflineGroupedChannelsreturns early for non-grouped identifiers.Two behaviours worth calling out. Recovery of a group whose first page failed raises the loader on grouped, where standard recovery never does, because
queryFirstPagebypasses the listener entirely. That is deliberate: a spinner while the retry runs is more accurate than a stale empty state. And a request withgroups = nullkeeps today's behaviour, since the keys are unknown until the response, so the mechanism is inert rather than half-engaged and cannot leave a list loading.Differences from the v6 version are mechanical: the files live under
stream-chat-android-clientrather thanstream-chat-android-state,ChannelsStateDatais imported fromclient.api.state, andQueryChannelsStateLogictakes an extraisLocalUnreadCountEnabledthat the test harness passes. The two channel-logic implementations on this branch,ChannelLogicImplandChannelLogicLegacyImpl, are the chat screen and are untouched; that half is tracked in AND-1462.Testing
Unit tests, carried over from #6674 and re-run here:
QueryChannelsMutableStateassert the emittedChannelsStateDatarather than setter calls: an in-flight first page on a cache miss staysLoading, a request arriving after the offline read still raises, and a failed load ends onOfflineNoResults. Reinstating the unconditional clear, or the earlier== nullguard, fails them.:stream-chat-android-clientsuite, detekt, spotless and apiCheck pass.Device verification on this branch, using the grouped channels sample against a locally published
7.9.0. Cold start with an empty database, logging everyChannelsStateemission, with only the client artifact swapped between runs:The extra
isLoading=false items=0frame is the bug, and it is gone. Reading the state rather than throttling the network makes the transition visible however fast the first page resolves.The v6 branch was verified separately on a throttled network (
OfflineNoResults -> Result(10)before,Loading -> Result(10)after), including the flipped ordering where the offline read runs before the query, which is the case the completion marker adds. A warm start still renders straight from cache.Summary by CodeRabbit
Bug Fixes
Tests