streaming functions for doobie and slick with tests

[salamonpavel]

Added support for streaming for both Slick and Doobie. Since Slick works with Futures but for streaming it relies on IOs or other effect types there was a need to abstract the streaming operation in a new DBStreamingEngine.

There are following modules:

• core - provides core non-streaming functionality of fa-db
• streaming - provides streaming functionality of fa-db
• slick - provides slick version of fa-db implementation for non-streaming functions
• slick-streaming - provides slick version of fa-db implementation for streaming functions
• doobie - provides doobie version of fa-db implementation for both streaming and non-streaming functions

Closes #107

[lsulak]

Found a few tiny things and Jacoco coverage action is still failing (not on insufficient coverage though), so please take a look. Otherwise LGTM.

I pulled it, reviewed, compiled and ran tests.

[github-actions]

JaCoCo code coverage report - scala 2.12.17

Total Project Coverage	58.19%	🍏

Module	Coverage
fa-db:core Jacoco Report - scala:2.12.17	61.79%	❌
fa-db:streaming Jacoco Report - scala:2.12.17	0%	❌

Files

Module	File	Coverage [48.91%]
fa-db:core Jacoco Report - scala:2.12.17	NamingConvention.scala	100%	🍏
	StandardStatusHandling.scala	100%	🍏
	DBSchema.scala	93.88%	🍏
	ExplicitNamingRequired.scala	87.5%	🍏
	LettersCase.scala	85.29%	🍏
	SnakeCaseNaming.scala	84.29%	🍏
	AsIsNaming.scala	40.63%	❌
	DBEngine.scala	20%	❌
	DBFunction.scala	6.83%	❌
fa-db:streaming Jacoco Report - scala:2.12.17	DBStreamingFunction.scala	0%	❌
	DBStreamingEngine.scala	0%	❌

[github-actions]

JaCoCo code coverage report - scala 2.13.12

Total Project Coverage	59.46%	🍏

Module	Coverage
fa-db:core Jacoco Report - scala:2.13.12	63.49%	❌
fa-db:streaming Jacoco Report - scala:2.13.12	0%	❌

Files

Module	File	Coverage [49.53%]
fa-db:core Jacoco Report - scala:2.13.12	LettersCase.scala	100%	🍏
	ExplicitNamingRequired.scala	100%	🍏
	NamingConvention.scala	100%	🍏
	StandardStatusHandling.scala	100%	🍏
	DBSchema.scala	93.88%	🍏
	SnakeCaseNaming.scala	89.29%	🍏
	AsIsNaming.scala	72.22%	❌
	DBEngine.scala	20%	❌
	DBFunction.scala	7.11%	❌
fa-db:streaming Jacoco Report - scala:2.13.12	DBStreamingFunction.scala	0%	❌
	DBStreamingEngine.scala	0%	❌

[salamonpavel]

Found a few tiny things and Jacoco coverage action is still failing (not on insufficient coverage though), so please take a look. Otherwise LGTM.

I pulled it, reviewed, compiled and ran tests.

Fixed this. The problem was in node version of Github's updated runner. Solved by an update of the jacoco github action version.

[salamonpavel]

@lsulak @jakipatryk Thanks for the initial review here and on the calls we had yesterday. Based on your comments I have made the streaming part for Slick as a separate package since additional dependencies are needed and we don't want to be importing transitive dependencies into our projects when streaming is not used. At the moment there is core module for non-streaming, streaming module for streaming, slick module for slick non-streaming, slick-streaming module for slick streaming and doobie module. Doobie module provides both non-streaming and streaming functions since Doobie already bring all the dependencis needed (works with fs2 streams under the hood) so there would be no benefit in splitting this into separate modules.

[miroslavpojer]

• pulled
• built
• test run
• jacoco parts - code review

[miroslavpojer]

I do not agree with removing the code coverage fail-check logic - see the comment on the end of the file.
As I know there is no hard merge block enabled.

[salamonpavel]

@miroslavpojer I am not satisfied with this situation either. Unfortunately I couldn't perform merge of previous pull request with this check in place. Let's work together to find a good solution so we can perform tests against a database both locally and within a Github pipeline; for instance with a dockerized Postgres instance.

[miroslavpojer]

Suggested change

	${{ github.workspace }}/slick/target/scala-${{ matrix.scalaShort }}/jacoco/report/jacoco.xml
	${{ github.workspace }}/slick/target/scala-${{ matrix.scalaShort }}/jacoco/report/jacoco.xml,

[miroslavpojer]

Suggested change

	${{ github.workspace }}/slick-streaming/target/scala-${{ matrix.scalaShort }}/jacoco/report/jacoco.xml
	${{ github.workspace }}/slick-streaming/target/scala-${{ matrix.scalaShort }}/jacoco/report/jacoco.xml,

[lsulak]

LGTM, just read the code