Daenyth

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Daenyth

package com.myproject.prelude

import cats.syntax.{AllSyntaxBinCompat => CatsSyntax}
import cats.effect.syntax.{AllSyntax => CESyntax}
import cats.effect.instances.{AllInstances => CEInstances}

/** Custom prelude for importing with -Yimport
  *
  * This means we never need to import cats syntax or stream explicitly
  */

Daenyth

import cats.effect.Sync
import cats.syntax.all._
import cats.effect.std.Dispatcher
import fs2.kafka.vulcan.{AvroSettings, avroDeserializer, avroSerializer}
import fs2.kafka.{Deserializer, Headers, Serializer}
import org.apache.kafka.common.serialization.{Serde, Serdes}
import vulcan.Codec

// Credit to Fede Fernández for the original CE2 version
// Note: this isn't under an open source license; it's for educational purposes only

Daenyth

Keybase proof

I hereby claim:

• I am daenyth on github.
• I am daenyth (https://keybase.io/daenyth) on keybase.
• I have a public key ASCSw0W8Kr-JKKaGIAxIIOqY3h1MuLZzNqx2epHUbiLD4Qo

To claim this, I am signing this object:

Daenyth

"Monad" is a word that describes a set of behaviors

In scala, we use the Monad[Foo] typeclass from cats to define instances of this behavior.

The essence of its behavior is the ability to describe a series of computations, where one computation depends on the result of the computation that came before it.

For example, Monad[Option] shows that the Option[A] data type can be used to describe computations of A which may result in no value.

Daenyth

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Daenyth

version = "2.7.1"

align = some
align.arrowEnumeratorGenerator = true
align.openParenCallSite = true
align.tokens = [caseArrow]

binPack.parentConstructors = true

comments.wrap = standalone

Daenyth

import cats.effect.Async
import doobie.util.transactor.Transactor

import scala.concurrent.ExecutionContext

trait DoobieSlickCompat {

  /** Create a Doobie Transactor backed by the same Jdbc DataSource as the live slick Database */
  def transactorFromSlick[F[_]: Async](
      slickDb: slick.jdbc.JdbcBackend#Database,

Daenyth

Notes

There's a lot of libraries with overlapping support. This tries to index the ones I've seen.

I only care about / list the ones that support cats-effect/fs2 in some way or another.

I'll list some project status:

• Dead = fully abandoned or archived
• Inactive = no changes for over a year (as of oct 2020)

Daenyth

/** Convenience imports for doobie, to make it easier to remember
  * 
  * @example {{{
  *  import DoobieImplicits.all._
  *  // is equal to all of:
  *  import doobie.postgres.implicits._
  *  import doobie.implicits._
  *  import doobie.implicits.legacy.instant._
  *  import doobie.implicits.legacy.localdate._
  *  import io.chrisdavenport.fuuid.doobie.implicits._