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Set the channel loading state until the first channel data arrives - #6721
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gpunto
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September 23, 2026 15:36
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. WalkthroughChannel watch setup marks loading when channel data is absent. Watch requests proceed even when loading is already true. Successful data updates and query errors clear loading, while message state checks current visible messages before reporting no results. ChangesChannel loading state
Estimated code review effort: 3 (Moderate) | ~20 minutes Sequence Diagram(s)sequenceDiagram
participant Caller
participant ChatClientStateCalls
participant ChannelMutableState
participant QueryChannel
participant ChannelStateLogic
Caller->>ChatClientStateCalls: Start channel watch
ChatClientStateCalls->>ChannelMutableState: setLoadingIfEmpty()
ChatClientStateCalls->>QueryChannel: Launch remote query
QueryChannel->>ChannelStateLogic: Process channel data or query error
ChannelStateLogic->>ChannelMutableState: setLoading(false)
Merge Risk: 🔵 Low · up to When overlapping first-load requests occur, the channel may briefly appear empty before the remaining request finishes. This is a bounded display issue to address or explicitly accept before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In
`@stream-chat-android-state/src/main/java/io/getstream/chat/android/state/plugin/logic/channel/internal/ChannelStateLogic.kt`:
- Line 800: Update the first-load watch handling in ChannelStateLogic so
overlapping requests are tracked and `loading` remains true while any request is
outstanding. Clear `loading` when data arrives or the final outstanding request
finishes, including after `propagateQueryError`; do not let one failed request
clear it while another is pending.
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📒 Files selected for processing (9)
stream-chat-android-client/src/main/java/io/getstream/chat/android/client/channel/state/ChannelState.ktstream-chat-android-state/src/main/java/io/getstream/chat/android/state/plugin/logic/channel/internal/ChannelLogicImpl.ktstream-chat-android-state/src/main/java/io/getstream/chat/android/state/plugin/logic/channel/internal/ChannelStateLogic.ktstream-chat-android-state/src/main/java/io/getstream/chat/android/state/plugin/state/channel/internal/ChannelMutableState.ktstream-chat-android-state/src/main/java/io/getstream/chat/android/state/plugin/state/internal/ChatClientStateCalls.ktstream-chat-android-state/src/test/java/io/getstream/chat/android/state/extensions/ChatClientExtensionTests.ktstream-chat-android-state/src/test/java/io/getstream/chat/android/state/plugin/logic/channel/internal/ChannelStateLogicTest.ktstream-chat-android-state/src/test/java/io/getstream/chat/android/state/plugin/state/channel/internal/ChannelMutableStateTests.ktstream-chat-android-state/src/test/java/io/getstream/chat/android/state/plugin/state/internal/ChatClientStateCallsTest.kt
💤 Files with no reviewable changes (1)
- stream-chat-android-state/src/main/java/io/getstream/chat/android/state/plugin/logic/channel/internal/ChannelLogicImpl.kt
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andremion
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Sep 24, 2026
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Goal
watchChannelAsStatereturns the channel state before the query fills it, so for a moment the channel has a correctcid but no members or messages.
ChannelState.loadingshould flag that window, but it has never been set for channels,so there is no way to tell "not loaded yet" from "empty". A customer app reading
channel.membersright after a coldstart from a push saw the other member missing for up to a second.
Closes AND-1560
Implementation
loadingis set when a channel with no data is watched, before the query starts, and cleared when channel dataarrives from the database or the API, or when the query fails.
the loader while
isLoadingis true.loadingguard inChannelLogicImpl.watch(). It never fired before, and withloadingnow working itwould start rejecting the recovery and load-newest watches.
messagesStatere-reads the current messages before reportingOfflineNoResults. Collected copies of the derived message flows can arrive afterloadingturns false, which briefly produced the empty state betweenLoadingandResult.Offline with no cached channel, the loader stays until the query times out, then the empty state shows.
Testing
Unit tests cover the flag being set only for an empty channel, being set before the query launches, and being cleared
after the channel data and members are written, or on failure. A dispatcher-driven test checks
messagesStategoes fromLoadingtoResultwithoutOfflineNoResultswhenloadingturns false before the messages propagate.Manually: kill the sample app, open a channel from a push notification, and check the loader shows instead of an empty
channel and that members are present once it disappears.
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