Pin coordinator join to a specific SFU via sfu_id - #1819
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Co-authored-by: Cursor <cursoragent@cursor.com>
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SDK Size Comparison 📏
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WalkthroughChangesSFU pin propagation
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to SFU pinning is forwarded through coordinator joins, but the changed generated join API may break applications or implementations compiled against the prior SDK version. Preserve the prior overloads or explicitly accept this compatibility break before merging. Sequence Diagram(s)sequenceDiagram
participant StreamVideoInitHelper
participant StreamVideoBuilder
participant StreamVideoClient
participant ProductvideoApi
StreamVideoInitHelper->>StreamVideoBuilder: pass sfuId
StreamVideoBuilder->>StreamVideoClient: set pinnedSfuId
StreamVideoClient->>ProductvideoApi: joinCall with sfuId
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Full details: Docstring CoverageExplanation Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 6 files. (1 skipped: 1 unsupported.)
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Inline comments:
In `@stream-video-android-core/api/stream-video-android-core.api`:
- Around line 32-33: Preserve the existing ProductvideoApi.joinCall and
joinCall$default JVM descriptors after adding sfu_id. Add compatibility
overloads that retain the previous parameter list and delegate appropriately, or
explicitly apply the project’s documented exclusion for this generated API from
binary-compatibility guarantees.
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⛔ Files ignored due to path filters (1)
stream-video-android-core/src/main/kotlin/io/getstream/android/video/generated/apis/ProductvideoApi.ktis excluded by!**/generated/**
📒 Files selected for processing (7)
demo-app/src/main/kotlin/io/getstream/video/android/util/StreamVideoInitHelper.ktstream-video-android-core/api/stream-video-android-core.apistream-video-android-core/src/main/kotlin/io/getstream/video/android/core/StreamVideoBuilder.ktstream-video-android-core/src/main/kotlin/io/getstream/video/android/core/StreamVideoClient.ktstream-video-android-core/src/main/kotlin/io/getstream/video/android/core/call/components/CallApiClient.ktstream-video-android-core/src/test/kotlin/io/getstream/video/android/core/call/components/CallApiClientTest.ktstream-video-android-core/src/test/kotlin/io/getstream/video/android/core/e2ee/CallE2EETest.kt
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PratimMallick
marked this pull request as ready for review
September 9, 2026 15:20
PratimMallick
added
pr:internal
Adding a Retrofit @query replaced the published ProductvideoApi.joinCall signature. Append the coordinator pin on the HTTP request instead. Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Replace the StreamVideoBuilder sfuId constructor parameter with an @InternalStreamVideoApi forceSfuId() function, matching the existing forceApiUrl / forceWssUrl pattern. The public constructor signature is untouched, so the API dump returns to its develop state. Drop StreamVideoClient.pinnedSfuId, which was written but never read; the interceptor receives the pin through CoordinatorConnectionModule.
Guard the interceptor at the install site so it is absent from the coordinator OkHttp chain unless a pin is configured, instead of adding a no-op interceptor to every client. The blank check moves to the guard, so the builder passes the configured value through unchanged.
aleksandar-apostolov
enabled auto-merge (squash)
September 10, 2026 10:20
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Goal
Closes AND-1510 — local SFU / cascading tests can keep every join, rejoin, and migrate on one coordinator edge.
The coordinator already supports
WithPinToSFUID(queryValues.Get("sfu_id")). Without sending that query, Android could be moved to a different SFU on reconnect.JS equivalent: dogfood
cascadingTransformercopies page-URL params onto the coordinator join whencascadingis present.?cascading&sfu_id=SFU-1is the pin. The JS client SDK does not pin on its own. ThesfuIdonConnectToLocalSfuis only a button label; that path overridessfuUrl/sfuWsUrl.Implementation
POST /video/call/{type}/{id}/joinaccepts?sfu_id=(same key as JS /WithPinToSFUID).LocalDevConfig.sfuIdandStreamVideoBuilder(sfuId = …)store the pin on the client.CallApiClient.joinRequestsends it on first join, rejoin, and migrate.Call.Testing
Set
LocalDevConfig(sfuId = "SFU-1")(orStreamVideoBuilder(sfuId = "SFU-1")), join a call, then force a rejoin. The coordinator join URL should keepsfu_id=SFU-1. Use the coordinator’s SFU id, not a LAN address.Ran
./gradlew :stream-video-android-core:apiDumpand:stream-video-android-core:testDebugUnitTestforCallApiClientTestandCallE2EETest— passed. Still to run:./gradlew spotlessCheck detekt apiCheck testDebugUnitTest.Made with Cursor
Summary by CodeRabbit
New Features
Tests