[Draft: Not for review] Changes to use Existing cassandra io for Bulk Cassandra Read with SSL

[VardhanThigle]

Overview

Changes to use Existing CassandraIO for Cassandra Bulk Read.

Note on Techdept

The existing CassandraIO works with Cassandra Driver's 3.0 interfaces. This would mean that we won't get out of box support for all the new features and configurations that 4.0 driver provides out of box. With this PR we are enabling the most basic use case of reading a primitive types on SSL enabled Cluster with client side validation. Mutual TLS and other advanced options are not implemented currently.
The strategy to eliminate this techdebt is to enable 4.0 in upstream code, once the Cassandra Bulk is working for basic use cases.
Till then, if we see any specific customer use case, we can manually incorporate it (the way SSL is currently handled).

PR Tree:

At the moment the PR is large. To de-risk having a lot of code for review, we have raised 2 child PRs:

1. Basic Changes to use Upstream Cassandra io for Bulk Cassandra Migration  #2129 - Has the first 2 commits, and gets basic CassandraIO working.
2. Enable SSL mode in embedded Cassandra used by unit tests. #2130 - UT only code to have an ssl enabled Cassandra Server for UT.
3. [Draft: Not for review] Changes to use Existing cassandra io for Bulk Cassandra Read with SSL #2114 - The Current PR which in addition to Basic Changes to use Upstream Cassandra io for Bulk Cassandra Migration  #2129 and Enable SSL mode in embedded Cassandra used by unit tests. #2130 also enables Read from SSL enabled Cassandra Clusters for the most basic use case. This PR will become smaller once Basic Changes to use Upstream Cassandra io for Bulk Cassandra Migration  #2129 and Enable SSL mode in embedded Cassandra used by unit tests. #2130 are merged to main line.

[codecov]

Codecov Report

Attention: Patch coverage is 95.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 54.97%. Comparing base (7147be4) to head (c5a53e4).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...er/CassandraTableReaderFactoryCassandraIoImpl.java	94.28%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2114      +/-   ##
============================================
+ Coverage     46.61%   54.97%   +8.35%     
+ Complexity     4278     1608    -2670     
============================================
  Files           868      406     -462     
  Lines         51581    21864   -29717     
  Branches       5401     2161    -3240     
============================================
- Hits          24046    12019   -12027     
+ Misses        25815     9147   -16668     
+ Partials       1720      698    -1022     

Components	Coverage Δ
spanner-templates	70.43% <98.60%> (+1.83%)	⬆️
spanner-import-export	∅ <ø> (∅)
spanner-live-forward-migration	77.51% <ø> (+0.02%)	⬆️
spanner-live-reverse-replication	78.45% <ø> (+0.02%)	⬆️
spanner-bulk-migration	87.91% <98.60%> (+0.24%)	⬆️

Files with missing lines	Coverage Δ
...der/io/cassandra/iowrapper/SSLOptionsProvider.java	100.00% <100.00%> (ø)
...er/CassandraTableReaderFactoryCassandraIoImpl.java	97.05% <94.28%> (ø)

... and 485 files with indirect coverage changes