feat: integrate CommonTemplateJvmInitializer for SSL certificate staging in SpannerToSourceDb pipeline.

[pratickchokhani]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 55.58%. Comparing base (3c54627) to head (0766b7b).

Files with missing lines	Patch %	Lines
...cloud/teleport/v2/templates/SpannerToSourceDb.java	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (0.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3910      +/-   ##
============================================
+ Coverage     55.56%   55.58%   +0.01%     
+ Complexity     7048     6599     -449     
============================================
  Files          1103     1103              
  Lines         67681    67682       +1     
  Branches       7603     7603              
============================================
+ Hits          37607    37618      +11     
+ Misses        27652    27641      -11     
- Partials       2422     2423       +1     

Components	Coverage Δ
spanner-templates	88.48% <0.00%> (-0.02%)	⬇️
spanner-import-export	68.67% <ø> (+0.11%)	⬆️
spanner-live-forward-migration	90.23% <ø> (-0.02%)	⬇️
spanner-live-reverse-replication	84.41% <0.00%> (-0.03%)	⬇️
spanner-bulk-migration	92.62% <ø> (-0.01%)	⬇️
gcs-spanner-dv	88.88% <ø> (-0.02%)	⬇️

Files with missing lines	Coverage Δ
...cloud/teleport/v2/templates/SpannerToSourceDb.java	19.46% <0.00%> (-0.06%)	⬇️

... and 6 files with indirect coverage changes

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enables SSL/TLS support for the SpannerToSourceDb pipeline by integrating the CommonTemplateJvmInitializer. It also significantly upgrades the integration testing infrastructure by providing a wrapper for Cassandra containers that automatically handles certificate generation and SSL configuration, ensuring that secure connectivity can be validated in test environments.

Highlights

• SSL Support Integration: Integrated CommonTemplateJvmInitializer into the SpannerToSourceDb pipeline to enable staging of SSL certificates via extraFiles.
• Test Infrastructure Update: Introduced CassandraSslContainerWrapper to support automated testing of Cassandra instances with SSL/TLS encryption enabled.
• Integration Test Enhancements: Updated SpannerToCassandraSourceDbIT to utilize the new SSL-enabled container wrapper and configure pipeline parameters for secure connections.

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[gemini-code-assist]

Code Review

This pull request integrates SSL/TLS encryption for Cassandra in the Spanner-to-SourceDb template. It introduces CassandraSslContainerWrapper to spin up a Cassandra container with SSL enabled, updates the integration tests to use this wrapper, and configures the Dataflow pipeline to stage the generated truststore. The review feedback focuses on improving the robustness of the container wrapper by properly handling InterruptedException during process execution, inheriting process I/O to aid in debugging keytool failures, and cleaning up temporary keystore and truststore files upon teardown.

[VardhanThigle]

looks good to me.
Please wait for ITs to pass before merging.