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Make releasing a realtime channel that isn't detached an error (RTS4c-e) - #1251
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WalkthroughRealtime channel detach requests now use the ChangesRealtime channel release
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🟡 Moderate · up to
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| Check name | Status | Explanation | Resolution |
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| Docstring Coverage |  |
Docstring coverage is 58.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 5 files. | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely describes the main change: releasing a realtime channel that is not detached now returns an error. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
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A rabbit checks the channel gate
Detaching waits to mark its state
Timers watch the callback trail
Bad releases raise the proper error
Good channels leave the collection
Listeners hop away at closure
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🟡 Changes recommended
Address concurrency and released-channel callback safety, and add FAILED-state coverage.
2 open findings
What changed in this PR
Implements RTS4c–e for next-major realtime channel release semantics, rejecting release of non-terminal channels with error 90011.
Changes:
- Removes implicit detach-on-release behavior.
- Adds UTS-derived release tests.
- Updates teardown, documentation, and obsolete tests.
| File | Summary |
|---|---|
pubsub-adapter/src/main/kotlin/com/ably/pubsub/Channels.kt |
Updates release documentation. |
liveobjects/src/test/kotlin/io/ably/lib/liveobjects/integration/setup/IntegrationTest.kt |
Avoids releasing attached channels during teardown. |
lib/src/test/kotlin/io/ably/lib/uts/unit/realtime/ChannelsCollectionTest.kt |
Adds RTS4c–e release coverage. |
lib/src/test/java/io/ably/lib/test/realtime/RealtimeChannelTest.java |
Removes obsolete detach-on-release coverage. |
lib/src/main/java/io/ably/lib/realtime/ChannelBase.java |
Removes obsolete released-channel detach handling. |
lib/src/main/java/io/ably/lib/realtime/AblyRealtime.java |
Enforces terminal-state release and LiveObjects disposal. |
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sacOO7
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Seems, there are race conditions we need to take care of as a part of the fix
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@sacOO7 done the check/remove/markAsReleased, that now happen under the channel's monitor. The dispose-by-name race was not introduced by this PR and is independent of it, and looks like the fix needs a lifecycle lock spanning get() plus a plugin API change, so not gonna pick it up in this PR, I'll leave it to you as someone more familiar with the sdk. |
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Actionable comments posted: 1
- 🪄 Fix comments: Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @pubsub-adapter/src/main/kotlin/com/ably/pubsub/Channels.kt:
- Line 42: Update the KDoc and declaration of
PubSubRealtimeClient.Channels.release to document that it throws AblyException
with error code 90011 for channels outside INITIALIZED, DETACHED, or FAILED, and
advise callers to detach and wait for completion first. Add
@Throws(AblyException::class) so Java callers can catch the checked exception.
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📒 Files selected for processing: 6
lib/src/main/java/io/ably/pubsub/realtime/ChannelBase.javalib/src/main/java/io/ably/pubsub/realtime/PubSubRealtimeClient.javalib/src/test/java/io/ably/pubsub/test/realtime/RealtimeChannelTest.javalib/src/test/kotlin/io/ably/pubsub/uts/unit/realtime/ChannelsCollectionTest.ktliveobjects/src/test/kotlin/io/ably/pubsub/liveobjects/integration/setup/IntegrationTest.ktpubsub-adapter/src/main/kotlin/com/ably/pubsub/Channels.kt
💤 Files with no reviewable changes: 1
- lib/src/test/java/io/ably/pubsub/test/realtime/RealtimeChannelTest.java
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Spec 6.3.0 replaces RTS4a, under which release() detaches the channel and then removes it, with RTS4c-e: release() of a non-existent channel is a no-op, a channel in the INITIALIZED, DETACHED or FAILED state is removed synchronously, and release() of a channel in any other state throws 90011 and does nothing else. Channels#release now declares AblyException. Users must call channel.detach() and wait for it to complete before releasing. Since a released channel can no longer be mid-detach, drop the released-channel special cases from the detach path, the test of the old behaviour, and the liveobjects test teardown's release of channels that may still be attached (close() already disposes of them). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> � Conflicts: � lib/src/test/java/io/ably/pubsub/test/realtime/RealtimeChannelTest.java � lib/src/test/kotlin/io/ably/pubsub/uts/unit/realtime/ChannelsCollectionTest.kt � liveobjects/src/test/kotlin/io/ably/pubsub/liveobjects/integration/setup/IntegrationTest.kt
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Implements RTS4c–e from spec 6.3.0 (ably/specification#557) for the next major version.
Breaking change:
channels.release(name)no longer detaches the channel implicitly.INITIALIZED,DETACHEDorFAILED, it is removed from the collection beforerelease()returns.release()throwsAblyExceptionwith code 90011 and status 400, and the channel is left unchanged.AblyRealtime.Channels.releasenow declaresthrows AblyException.Migration: call
channel.detach(listener)and wait for it to complete before callingchannels.release(name).Also:
90011 is registered in ably/ably-common#367. The deprecation warning for the current major is in #1250. Reference ably-js PRs: ably/ably-pubsub-js#2322 (deprecation) and ably/ably-pubsub-js#2323 (next major).
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