Add more metrics for backend plugin

[joshuali925]

Signed-off-by: Joshua Li [email protected]

Description

Add more metrics to backend, follow up PR for #1306

{
  "saved_visualization": {
    "create": {
      "count": 0,
      "total": 0
    },
    "update": {
      "total": 0,
      "count": 0
    }
  },
  "permission_user_error": 0,
  "observability": {
    "update": {
      "total": 0,
      "user_error": 0,
      "count": 0,
      "system_error": 0
    },
    "delete": {
      "user_error": 0,
      "total": 0,
      "system_error": 0,
      "count": 0
    },
    "get": {
      "user_error": 0,
      "system_error": 0,
      "total": 0,
      "count": 0
    },
    "create": {
      "user_error": 0,
      "system_error": 0,
      "total": 0,
      "count": 0
    }
  },
  "request_total": 0,
  "saved_query": {
    "create": {
      "total": 0,
      "count": 0
    },
    "update": {
      "total": 0,
      "count": 0
    }
  },
  "timestamp": {
    "create": {
      "total": 0,
      "count": 0
    },
    "update": {
      "count": 0,
      "total": 0
    }
  },
  "application": {
    "update": {
      "count": 0,
      "total": 0
    },
    "create": {
      "total": 0,
      "count": 0
    }
  },
  "exception": {
    "illegal_state": 0,
    "illegal_argument": 0,
    "opensearch_status": 0,
    "io": 0,
    "version_conflict_engine": 0,
    "opensearch_security": 0,
    "invalid_index_name": 0,
    "index_not_found": 0,
    "internal_server_error": 0
  },
  "notebook": {
    "create": {
      "count": 0,
      "total": 0
    },
    "update": {
      "total": 0,
      "count": 0
    }
  },
  "operational_panel": {
    "update": {
      "total": 0,
      "count": 0
    },
    "create": {
      "total": 0,
      "count": 0
    }
  },
  "failed_request_count_system_error": 0,
  "security_permission_error": 0,
  "success_count": 0,
  "request_count": 0,
  "failed_request_count_user_error": 0
}

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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.

[codecov-commenter]

Codecov Report

Merging #1323 (fe06f8c) into 2.x (17b8771) will increase coverage by 0.23%.
The diff coverage is 92.30%.

@@             Coverage Diff              @@
##                2.x    #1323      +/-   ##
============================================
+ Coverage     41.82%   42.06%   +0.23%     
  Complexity      315      315              
============================================
  Files           302      302              
  Lines         17840    17917      +77     
  Branches       4285     4286       +1     
============================================
+ Hits           7462     7536      +74     
- Misses        10205    10207       +2     
- Partials        173      174       +1     

Flag	Coverage Δ
dashboards-observability	37.25% <ø> (ø)
opensearch-observability	70.88% <92.30%> (+0.78%)	⬆️

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

Impacted Files	Coverage Δ
...ervability/action/GetObservabilityObjectRequest.kt	93.25% <0.00%> (-1.06%)	⬇️
...rg/opensearch/observability/model/SearchResults.kt	93.33% <0.00%> (-2.13%)	⬇️
...ability/action/UpdateObservabilityObjectRequest.kt	91.37% <75.00%> (+0.81%)	⬆️
...ability/action/CreateObservabilityObjectRequest.kt	96.22% <85.71%> (+0.39%)	⬆️
...bility/action/CreateObservabilityObjectResponse.kt	100.00% <100.00%> (ø)
...ability/action/DeleteObservabilityObjectRequest.kt	93.93% <100.00%> (+0.39%)	⬆️
...bility/action/DeleteObservabilityObjectResponse.kt	91.17% <100.00%> (+0.55%)	⬆️
...bility/action/UpdateObservabilityObjectResponse.kt	100.00% <100.00%> (ø)
...in/org/opensearch/observability/metrics/Metrics.kt	93.42% <100.00%> (+11.27%)	⬆️
...ervability/resthandler/ObservabilityRestHandler.kt	86.59% <100.00%> (+1.20%)	⬆️

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