Renaming RestAPIs while supporting backwards compatibility.

[saratvemulapalli]

Signed-off-by: Sarat Vemulapalli vemsarat@amazon.com

Description

Renaming RestAPIs from _opendistro to _plugins.

• This PR replaces all existing REST APIs starting with _opendistro to _plugins.
  Example:
  _opendistro/_anomaly_detection/* -> _plugins/_anomaly_detection/*
• It supports backwards compatibility as old APIs still work, but a warning message in the logs is spit out explaining the path is deprecated.
• Tested APIs with both prefixes _opendistro and _plugins. Added integration tests to verify.
  • Ideal way to test these APIs is to have Parameterized tests, i.e pass both old and new URI's to make sure all the APIs work and are backwards compatible. But there is a problem with Parameterized tests in OpenSearch Rest Test framework. [BUG] OpenSearchRestTestCase support for Parameterized Tests is broken OpenSearch#695

Check List

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[codecov-commenter]

Codecov Report

Merging #35 (329f872) into main (a648e86) will increase coverage by 0.12%.
The diff coverage is 91.22%.

@@             Coverage Diff              @@
##               main      #35      +/-   ##
============================================
+ Coverage     79.21%   79.34%   +0.12%     
- Complexity     2681     2694      +13     
============================================
  Files           242      242              
  Lines         11025    11065      +40     
  Branches       1010     1012       +2     
============================================
+ Hits           8734     8780      +46     
+ Misses         1878     1873       -5     
+ Partials        413      412       -1     

Flag	Coverage Δ	Complexity Δ
plugin	79.34% <91.22%> (+0.12%)	2694.00 <12.00> (+13.00)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...stroforelasticsearch/ad/AnomalyDetectorPlugin.java	95.38% <ø> (ø)	10.00 <0.00> (ø)
...search/ad/rest/RestIndexAnomalyDetectorAction.java	49.01% <75.00%> (+2.08%)	4.00 <1.00> (+1.00)
...forelasticsearch/ad/rest/AbstractSearchAction.java	40.42% <77.77%> (+15.42%)	4.00 <3.00> (+2.00)
...icsearch/ad/rest/RestAnomalyDetectorJobAction.java	57.14% <100.00%> (+7.14%)	4.00 <1.00> (+1.00)
...earch/ad/rest/RestDeleteAnomalyDetectorAction.java	60.00% <100.00%> (+6.15%)	5.00 <1.00> (+1.00)
...arch/ad/rest/RestExecuteAnomalyDetectorAction.java	26.19% <100.00%> (+3.69%)	4.00 <1.00> (+1.00)
...icsearch/ad/rest/RestGetAnomalyDetectorAction.java	48.00% <100.00%> (+9.90%)	5.00 <2.00> (+1.00)
...arch/ad/rest/RestPreviewAnomalyDetectorAction.java	20.00% <100.00%> (+4.21%)	5.00 <1.00> (+1.00)
...elasticsearch/ad/rest/RestSearchADTasksAction.java	100.00% <100.00%> (ø)	2.00 <0.00> (ø)
...earch/ad/rest/RestSearchAnomalyDetectorAction.java	100.00% <100.00%> (ø)	2.00 <0.00> (ø)
... and 7 more

[dblock]

This works, but I think it's a bit too much copy-paste. I suggest modifying/wrapping/extending Route to either allow multiple paths in the constructor, or extending Route with a static method that takes a method, and a list of paths, to return a list of routes.

[dblock]

I think "replaced" is not a great name, maybe "deprecated"? Otherwise looks ok.

[dblock]

I think "replaced" is not a great name, maybe "deprecated"? Otherwise looks ok.

I wrote this when I didn't know there was support for this already in OpenSearch.

[dblock]

LGTM, but would wait for @ylwu-amzn to re-review

[ylwu-amzn]

LGTM. Thanks for the change.