aglinxinyuan opened a new issue, #8689:
URL: https://github.com/apache/texera/issues/8689
### Task Summary
`CacheStatusUpdateEvent` is a websocket event the backend no longer sends.
The frontend still subscribes to it.
**Introduced by** #1328 (2021-09-08, "[Operator Caching Step 3] add operator
cache backend new files and config changes"). The frontend handler came in
#1327, the day before.
**Usage removed by** #3111 (2024-11-26, "Update amber to depend on sub
projects"). That PR deleted the `EditingTimeCompilationRequest` branch of
`WorkflowWebsocketResource`, which ran the cache checker and called
`sessionState.send(CacheStatusUpdateEvent(...))`. Nothing has constructed the
event since.
It has been dead for nearly two years. Several pieces remain:
- the case class and its `@JsonSubTypes` registration;
- protocol-spec entries;
- the frontend interface and type-map entry;
- a `subscribeToEvent("CacheStatusUpdateEvent")` handler in
`OperatorReuseCacheStatusService`, which never fires, and its two tests.
This is a pure deletion with no behaviour change: +3/−87 lines. The
service's other subscription, which repaints the reuse-cache marker when an
operator's reuse flag changes, is live and stays.
### Task Type
- [x] Refactor / Cleanup
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