fix: dedupe concurrent getNodeAjaxOptions requests (#10155) - #10307
fix: dedupe concurrent getNodeAjaxOptions requests (#10155)#10307hiteshjambhale wants to merge 4 commits into
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getNodeAjaxOptions cached responses only after they resolved, so concurrent callers for the same URL (e.g. every column row's Data Type dropdown mounting at once) all saw an empty cache and each fired its own identical HTTP GET. Track in-flight requests in a module-level Map keyed by the resolved URL and query params. Concurrent callers now await the same underlying request; the first to resolve populates the cache as before, and the entry is cleaned up on settle so the map does not leak. Fixes pgadmin-org#10155 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Address review feedback on the getNodeAjaxOptions dedup:
- Move the in-flight request sharing out of node_ajax.js and into
api_instance.js as a reusable getInflight() helper, so any part of
the app can dedupe identical concurrent GETs, not just node options.
- Build the in-flight key with a stable, key-order-independent
stringify (sorted keys, recursive) so {a:1,b:2} and {b:2,a:1} and
nested params resolve to the same key.
- Run caching and transform per-caller in each caller's own .then on
the shared response, so concurrent callers with differing params
each cache correctly instead of inheriting the first caller's.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…sions Address CodeRabbit review on pgadmin-org#10159. getInflight is exported, so key building should be safe regardless of caller, even though the sole caller today (getNodeAjaxOptions) can't trigger these cases: - Include config.headers in the key so callers differing only in headers (e.g. a different Authorization) never share an in-flight response. - Type-tag primitives in stableStringify so values with the same JSON form but different types no longer collide (number 1 vs string "1"), and handle undefined so [undefined] no longer collapses to []. Insertion-order independence and the undefined-params default are unchanged.
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Included review availability: Your plan includes up to 8 reviews per rolling hour; 6 remain after this review. WalkthroughThe API module now deduplicates concurrent GET requests with deterministic keys. ChangesIn-flight GET deduplication
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change shares concurrent requests while preserving cached behavior and response handling; no actionable merge-blocking risk remains after normal checks and review. Sequence Diagram(s)sequenceDiagram
participant NodeAjax
participant getInflight
participant API
NodeAjax->>getInflight: Request URL, params, and headers
getInflight->>API: Send one GET for a new request key
getInflight-->>NodeAjax: Return shared promise
API-->>getInflight: Resolve or reject request
getInflight->>getInflight: Remove settled request
getInflight-->>NodeAjax: Return shared response or error
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Inline comments:
In `@web/pgadmin/static/js/api_instance.js`:
- Around line 41-53: The request-key construction around stableStringify must
reflect the effective Axios request: derive the URI with api.getUri using the
merged config and url, preserve paramsSerializer/URLSearchParams semantics, and
include canonical effective headers such as instance defaults. Update the
relevant key-generation function and add coverage proving differing query
strings or authorization headers produce distinct Promise keys.
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Pull request overview
Adds in-flight GET request sharing for AJAX-backed dropdowns to reduce duplicate concurrent requests.
Changes:
- Adds stable request keys and in-flight request tracking.
- Integrates request sharing into
getNodeAjaxOptions().
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
web/pgadmin/static/js/api_instance.js |
Adds shared in-flight GET handling. |
web/pgadmin/browser/static/js/node_ajax.js |
Uses shared requests for dropdown options. |
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The dedup key was built from the raw config, which meant it could not see
everything that distinguishes one request from another. Distinct
URLSearchParams values all stringified to {}, a custom paramsSerializer
was ignored entirely, and the header configuration of the axios instance
itself never entered the key at all, so an instance built with extra
headers (getApiInstance({'Content-Encoding': 'gzip'}), as
ApplicationStateProvider does) could in principle be handed a response
fetched without them.
The key now comes from api.getUri(), which resolves the URI exactly as
the request will, honouring the instance baseURL, plain-object params,
URLSearchParams and any custom serialiser, with the instance's own header
config and the per-request headers hashed in alongside it. Params are
canonicalised first so that callers passing the same values in a
different order still share, which is what the previous key-sorting
achieved.
Beyond params and headers there is plenty in an axios config we cannot
capture this way, and which changes either what a caller gets back or how
it can be aborted: transformResponse, responseType, validateStatus,
timeout, signal and so on. Rather than let those share silently, a
request carrying anything outside the shareable set now goes straight
through to api.get().
Adds a spec covering the sharing itself, each of the collisions above,
cleanup after success and after failure, and the pass-through path.
getNodeAjaxOptions() in web/pgadmin/browser/static/js/node_ajax.js, the shared helper behind every AJAX-backed dropdown, cached responses only once they had resolved, so when many components asked for the same URL before the first response landed each of them saw an empty cache and fired its own identical GET. Every column row's Data Type dropdown mounting at once on a wide table's Columns tab therefore produced one get_types request per row: around 150 concurrent duplicates on a 150-column table. Concurrent GETs are now shared in the Axios wrapper. A module-level Map tracks requests in flight, keyed on the request axios will actually make: api.getUri() resolves the URI exactly as the request will, honouring the instance baseURL, plain-object params, URLSearchParams and any custom paramsSerializer, whilst the instance's own header configuration and the per-request headers are hashed in alongside it, so an instance built with extra headers never shares with a plain one. Params are canonicalised first so that callers passing the same values in a different order still share. The entry is removed once the request settles, success or failure, so nothing leaks and later callers fetch fresh data. Beyond params and headers there is plenty in an axios config that cannot be captured in a key and that changes either what a caller gets back or how it can be aborted: transformResponse, responseType, validateStatus, timeout, signal and so on. Rather than let those share silently, a request carrying anything outside the shareable set goes straight through to api.get(). Each caller still runs its own caching and transform on the shared response, so cached behaviour and response-shape handling are unchanged. Fixes #10155.
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Merged to master as 104d018, squashed into a single commit with you as the author. GitHub won't auto-close the PR because the squash changed the SHA, so I'm closing it manually. Thanks for this: the diagnosis was spot on, and factoring the sharing into the Axios wrapper rather than into Verified before merging: the new spec passes, the full Jest suite is green at 926 tests across 150 suites, and eslint is clean. The one red CI job on the PR was a macOS runner failing to reach PyPI, unrelated to the change. |
Summary
Fixes #10155. (Re-opens #10159, which was auto-closed when the source fork was recreated — same branch, same change.)
getNodeAjaxOptions()inweb/pgadmin/browser/static/js/node_ajax.js— the shared helper behind every AJAX-backed dropdown — cached responses only after they resolved. So when many components requested the same URL before the first response landed (e.g. every column row's Data Type dropdown mounting at once on a wide table's Columns tab), each one saw an empty cache and fired its own identicalGET. A 150-column table produced ~150 concurrent duplicateget_typesrequests.Fix
Added in-flight request sharing:
Maptracks requests currently in progress, keyed by the resolved full URL + query params..finally()), success or failure, so it doesn't leak.Result: one shared
get_typesrequest for all concurrent callers instead of one per row. Cached behavior and response-shape handling are unchanged.Summary by CodeRabbit
Performance Improvements
Reliability