[Streaming Indexing] Introduce bulk HTTP API streaming flavor

[reta]

Description

Introduce bulk HTTP API streaming flavor

Related Issues

Closes #9070

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

❌ Gradle check result for 0a25d48: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 503e05e: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for b8d2274: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for e4f4a0b: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for 20f72eb: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 12.00000% with 44 lines in your changes missing coverage. Please review.

Project coverage is 71.90%. Comparing base (23cba28) to head (62b27d2).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...rc/main/java/org/opensearch/client/RestClient.java	0.00%	22 Missing ⚠️
.../rest/action/document/RestBulkStreamingAction.java	12.00%	20 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #15381      +/-   ##
============================================
- Coverage     71.91%   71.90%   -0.02%     
- Complexity    63311    63326      +15     
============================================
  Files          5225     5225              
  Lines        296350   296389      +39     
  Branches      42809    42818       +9     
============================================
- Hits         213119   213113       -6     
- Misses        65743    65811      +68     
+ Partials      17488    17465      -23     

☔ View full report in Codecov by Sentry.
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[github-actions]

❌ Gradle check result for 5b3087a: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for 9c1aad3: SUCCESS

[reta]

@andrross thanks a mill for approving, conflicts resolved + more tests added, could you please reapprove? thank you!

[github-actions]

❕ Gradle check result for 62b27d2: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-15381-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 8d17c8d87e67db8924ed66ab0128f0bdc6aff274
# Push it to GitHub
git push --set-upstream origin backport/backport-15381-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-15381-to-2.x.

[andrross]

This looks like a good candidate for a unit test. What do you think?

[reta]

My apologies, have seen the comment after merge only. Sadly our codecov captures only limited subset of tests, the ReactorNetty4StreamingIT covers this method in full, from my local code coverage report:

I will try to figure out what we could do here to have codecov capturing more.