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Refactoring code sample for connecting to CloudSQL databases using Cloud SQL Connector for Java #8794

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@minherz

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@minherz

The repo hosts three code samples that demonstrate the use of the Cloud SQL Connector for Java to connect to the managed versions of MySQL, Postgres and SQL Server databases (CloudSQL).
These three samples are implemented as three-tier applications with the frontend running in the browser, backend running on CloudRun and using CloudSQL database as a datalayer.

In its current format these code samples are hard to maintain. They also go out of the line compared to other code samples because of their complexity, lack of region tag association and loosely trackable exposure via code samples browser only.
Additionally these code samples show connectivity practices that are discouraged due their poor security.

The following modifications are recommended to ALL code samples:

  • Source code should be simplified to cover only connectivity part. If the three tier application format is essential, the code samples should be migrated to designated repo.
  • Source code should utilize region tags; The code snippets can be added to the connection options documentations (see overview page for MySql connection as an example)
  • Authentication methods should be revised to embrace a more secure connectivity methods that leverage underlying identity of GCP infrastructure

These recommendations can be implemented in the scope of this issue or designated issues can be created to address each of them separtely.

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priority: p2Moderately-important priority. Fix may not be included in next release.samplesIssues that are directly related to samples.type: feature request‘Nice-to-have’ improvement, new feature or different behavior or design.

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