Upload Media: Rebuild the upload queue on an operation registry - #82474
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Turn the closed `switch` in `processItem()` into a registry of named operations held in the `core/upload-media` store, and register the steps that ship with the package through it under `core/*` names. - Operation handlers follow one contract: resolve with updates for the item, or throw to cancel it. `runOperation()` is the single dispatch path that settles the item afterwards. Core handlers keep their store access through a privileged context; the public context only exposes `signal`, `settings`, `updateProgress`, `addOperations` and `addSideloadItem`. - `prepareItem()` runs every registered operation's `plan()` over the pipeline core decided on, so an operation can insert itself before or after a named step, or replace the pipeline. An unregistered step fails the item with `UNKNOWN_OPERATION` instead of leaving it stuck. - Concurrency limits become named pools declared on the operation (`upload`, `image`, `video`) instead of per-enum checks spread over `processItem()`, `finishOperation()`, `cancelItem()` and selectors. - Every operation carries a label, used by the debug logger. - `UploadError` gains a `silent` flag so a handler can drop an optional companion without surfacing an error. - Remove the `useSubRegistry` option of `MediaUploadProvider`, which had no consumer, so there is exactly one upload store per page for registrations to land in. No public API is exposed yet; `registerOperation` and `unregisterOperation` are private actions. See #82035. Co-authored-by: Pascal Birchler <pascal.birchler@gmail.com> Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Sr7G5nRsbso744zkruyGHZ
Co-authored-by: Pascal Birchler <pascal.birchler@gmail.com> Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Sr7G5nRsbso744zkruyGHZ
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drafts: true📝 WalkthroughWalkthroughThe upload queue now uses a registered operation model with namespaced operations, configurable concurrency pools, operation planning, shared handler contexts, and centralized result handling. ChangesUpload operation registry
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟡 Moderate · up to Concurrent image uploads can interrupt an active image transcode and cause processing failures. The pool declaration should be corrected before merge. Sequence Diagram(s)sequenceDiagram
participant UploadQueue
participant OperationRegistry
participant OperationHandler
participant UploadStore
UploadQueue->>OperationRegistry: Resolve operation definition
OperationRegistry-->>UploadQueue: Return handler and pool
UploadQueue->>OperationHandler: Run with operation context
OperationHandler->>UploadStore: Upload or process media
UploadStore-->>OperationHandler: Return result or error
OperationHandler-->>UploadQueue: Settle operation
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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swissspidy
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[Type] Enhancement
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CI note: the PHP 7.4 on Linux unit test job failed on 06e00bf before any test ran. The wp-env Docker image build for PHP 7.4 hit a Generated by Claude Code |
🤖 PR meta 🤖📦 Bundle sizeSize Change: +1.01 kB (+0.01%) Total Size: 8 MB 📦 View Changed
⚡ PerformanceShow the resultsClient side metrics exclude the server response time. front-end-block-theme
front-end-classic-theme
media-processing
media-upload
post-editor
site-editor
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…state The vitest conventions check type-checks every test file, including the ones the package tsconfig excludes, and one state literal lacked the new `operations` slice. Co-authored-by: Pascal Birchler <pascal.birchler@gmail.com> Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Sr7G5nRsbso744zkruyGHZ
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Inline comments:
In `@packages/upload-media/src/store/operations.ts`:
- Around line 106-114: Add OperationType.TranscodeImage to IMAGE_PROCESSING_POOL
using the same pool declaration pattern as ResizeCrop and Rotate, so processItem
and active-count tracking include transcode operations and worker recycling
remains safe.
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📒 Files selected for processing (19)
packages/block-editor/src/components/provider/index.jsxpackages/upload-media/CHANGELOG.mdpackages/upload-media/src/components/provider/index.tsxpackages/upload-media/src/components/provider/with-registry-provider.tsxpackages/upload-media/src/store/actions.tspackages/upload-media/src/store/index.tspackages/upload-media/src/store/operations.tspackages/upload-media/src/store/private-actions.tspackages/upload-media/src/store/private-selectors.tspackages/upload-media/src/store/reducer.tspackages/upload-media/src/store/test/actions.tspackages/upload-media/src/store/test/operations.tspackages/upload-media/src/store/test/private-actions.jspackages/upload-media/src/store/test/reducer.tspackages/upload-media/src/store/test/selectors.tspackages/upload-media/src/store/types.tspackages/upload-media/src/store/utils/operations.tspackages/upload-media/src/store/utils/test/operations.tspackages/upload-media/src/upload-error.ts
💤 Files with no reviewable changes (2)
- packages/upload-media/src/components/provider/with-registry-provider.tsx
- packages/upload-media/src/store/index.ts
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The vips worker recycle deferred only while a resize or rotate was in flight, so a format transcode running in the same worker could be killed once the recycle budget was hit. Transcoding now joins the image processing pool, which also throttles it like the other vips operations, and the recycle check keys on the pool instead of a list of names. Co-authored-by: Pascal Birchler <pascal.birchler@gmail.com> Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Sr7G5nRsbso744zkruyGHZ
Upload transports do not always reject with an Error: the editor's media-upload wrapper forwards only the message string, and a REST failure can be a plain object. runOperation replaced those with a generic UploadError, so the notice the user saw for a server-rejected file lost its real message, which the upload progress snackbar e2e test caught. cancelItem, the retry classifier and the onError callbacks already handle strings and plain objects, so pass the rejection through as it is. Co-authored-by: Pascal Birchler <pascal.birchler@gmail.com> Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Sr7G5nRsbso744zkruyGHZ
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What?
See #82035.
First step of the plan discussed on the issue: rebuild what the upload queue already does on top of an operation registry, before exposing any public API. The steps that ship with
@wordpress/upload-mediaare now registered through the same registry a plugin would use,processItem()dispatches by lookup instead of aswitch, and concurrency limits are declared per operation as pools.No public API is exposed yet.
registerOperation/unregisterOperationare private actions on thecore/upload-mediastore, so nothing changes for consumers of the package.Why?
The queue had no extension points: a closed
OperationTypeenum, aswitchinprocessItem(), the operations list assembled inline inprepareItem(), and concurrency limits hard-coded per enum member in four places. Making core use the registry first proves the handler contract and lets the publicregisterUploadOperation()land as a thin wrapper in a follow-up.How?
state.operationsholdsOperationDefinitions keyed by namespaced name (core/upload,core/thumbnail-generation, …). Core definitions live instore/operations.tsand seed the default state.registerOperation()validates the name (namespace/operation-name), rejects duplicates (replace = unregister, then register), and requires alabeland ahandler.( item, args, context )and resolves with updates for the item (file,attachment,additionalData,poster) or throws to cancel it.runOperation()is the single dispatch path: it awaits the handler, then callsfinishOperation()orcancelItem(). The core thunks were converted to return/throw instead of calling those themselves; the core definitions are thin adapters onto them.OperationContextexposessignal,settings,updateProgress(),addOperations()andaddSideloadItem()(which fills inparentIdandpostitself). Operations in thecore/namespace additionally getselectanddispatch, since thumbnail generation and the upload/sideload split need the store.core/prepareclassifies the item and builds its default pipeline, every registered operation's optionalplan( item, { operations, settings } )runs inpriorityorder and may return a placement ({ before | after | at, args }), a full replacement array, or nothing. A placement whose anchor is absent is skipped. A pipeline naming an unregistered operation fails the item with the newUNKNOWN_OPERATIONerror code rather than hanging.concurrency: 'upload' | { pool, limit }on the definition replaces the per-enum checks inprocessItem(),finishOperation(),cancelItem()and the sixgetActive*Count/getPending*selectors, nowgetActiveCountByPool(),getPendingItemsByPool()andgetConcurrencyPoolLimit(). Core declaresupload(maxConcurrentUploads),image(maxConcurrentImageProcessing) andvideo(1).UploadError.silentlets a handler drop an optional companion (the GIF → video sideload) without invokingonError, which used to be the third argument ofcancelItem().MediaUploadProviderloses itsuseSubRegistryoption (its only consumer already passedfalse), so registrations always land in the onecore/upload-mediastore in the default registry.OperationTypekeeps its members as typed constants; only the string values changed to the namespaced form. Nothing persists them.Follow-ups, not in this PR: the public
registerUploadOperation()/unregisterUploadOperation()/getUploadOperation()exports, README docs, and proving it with a first plugin (video sub-sizes).Testing Instructions
Behavior is meant to be unchanged.
npm run test:unit:vitest -- packages/upload-media(373 tests, including new coverage for the registry, planning, handler context and pools instore/test/operations.tsandstore/utils/test/operations.ts).npm run typecheckandnpm run lint:js -- packages/upload-media/src.SCRIPT_DEBUGon, the console showsStarting operation core/upload (Uploading) for …style lines with the new names and labels.Testing Instructions for Keyboard
Not applicable, no UI changes.
Screenshots or screencast
Not applicable.
Use of AI Tools
Implementation, tests and this description were written with Claude Code, following the plan in #82035 (comment), and reviewed by the author.
🤖 Generated with Claude Code
https://claude.ai/code/session_01Sr7G5nRsbso744zkruyGHZ
Generated by Claude Code
Summary by CodeRabbit
New Features
Bug Fixes