SOLR-18248: Migration of CancelTask V2 API to JAX-RS construct

[jaykay12]

https://issues.apache.org/jira/browse/SOLR-18248

Description

Migration of Cancel Task V2 API into JAX-RS Construct

Solution

No AI Usage.

Tests

Please describe the tests you've developed or run to confirm this patch implements the feature or solves the problem.

Checklist

Please review the following and check all that apply:

• I have reviewed the guidelines for How to Contribute and my code conforms to the standards described there to the best of my ability.
• I have created a Jira issue and added the issue ID to my pull request title.
• I have given Solr maintainers access to contribute to my PR branch. (optional but recommended, not available for branches on forks living under an organisation)
• I have developed this patch against the main branch.
• I have run ./gradlew check.
• I have added tests for my changes.
• I have added documentation for the Reference Guide
• I have added a changelog entry for my change

[epugh]

the fact that this was called _TASK__CONCELLATION already is some good evidence that our renaming is headed int he right direction!

[epugh]

Okay, caan you look the components that are defined in this? I poked aroudn a bit and I think that the "components" defined in this file aren't actually needed anymore or used.... Both for the cancel handler and the list tasks handler below.. Can you investigate and see if this is old dead code, maybe from our previous work to migrate tasks? I don't think it breaks anything, but since we are in here, we should clean this up.

[jaykay12]

yes, majorly all cleanup has been done related with this migration alongside only, there looks like no other scope of cleanup here right now.

[epugh]

Getting closer! Some comments on two things to change.

[epugh]

Okay, caan you look the components that are defined in this? I poked aroudn a bit and I think that the "components" defined in this file aren't actually needed anymore or used.... Both for the cancel handler and the list tasks handler below.. Can you investigate and see if this is old dead code, maybe from our previous work to migrate tasks? I don't think it breaks anything, but since we are in here, we should clean this up.

[jaykay12]

self-reviewed ✅

[epugh]

LGTM!

[Copilot]

Pull request overview

Migrates the V2 task-cancellation API to JAX-RS while retaining V1 compatibility and distributed cancellation.

Changes:

• Adds the typed DELETE /tasks/{taskID} endpoint and response model.
• Consolidates local and distributed task operations.
• Updates registration, tests, documentation, and changelog.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
task-management.adoc	Documents the V2 cancellation endpoint.
CancelTaskTest.java	Tests local cancellation behavior.
SolrCoreTest.java	Updates implicit-handler assertion.
ImplicitPlugins.json	Registers the replacement handler.
TaskManagementHandler.java	Removes obsolete component dispatch.
TaskCancellationHandler.java	Preserves V1 and registers JAX-RS.
QueryCancellationComponent.java	Removes legacy cancellation component.
ActiveTaskQuerySupport.java	Adds shared distributed cancellation.
CancelTaskAPI.java	Removes legacy annotated V2 API.
CancelTask.java	Implements the JAX-RS resource.
CancelTaskResponse.java	Adds the typed response model.
TasksApi.java	Defines the DELETE endpoint contract.
SOLR-18248-cancel-tasks.yml	Adds the changelog entry.

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[epugh]

Okay, I think this is finally ready. I DID end up looking across all the TaskManagement apis in this, I guess maybe should have pushed to get the CancelTask in, and then in a seperate PR... but ohwell.