When Cassandra meets Cats IO, but cutter.

Cassie is an open-source library which provides a set of tools to integrate the Datastax Cassandra Java Driver into the cats and cats-effects world.

import cats.effect.IO
import com.datastax.driver.core.Session
import eu.monniot.cassie
import eu.monniot.cassie.implicits._

// Create the driver session as usual
implicit val session: Session = ???

case class MyItem(a: String)

val query: IO[Either[cassie.CassieException, Vector[MyItem]]] = for {
  statement <- cql"SELECT * FROM my_keyspace.my_table"
  result <- cassie.execute(statement)
} yield result.asVectorOf[MyItem]

val query2: IO[Either[cassie.CassieException, Iterable[MyItem]]] = for {
  statement <- cql"SELECT * FROM my_keyspace.my_table"
  result <- cassie.execute(statement)
  more <- cassie.fetchMoreResults(result)
} yield (result ++ more).asIterableOf[MyItem]

Cassie is published to JCenter and built against scala 2.12.3, so you can just add the following to your build:

resolvers += Resolver.jcenterRepo

libraryDependencies += "eu.monniot.cassie" %% "cassie" % "0.1.0"

Cassie documentation will eventually be available here. Stay tuned :)

The Cassie project welcomes contributions from anybody wishing to participate. All code or documentation that is provided must be licensed with the same license that Cassie is licensed with (Apache 2.0, see LICENSE.txt).

People are expected to follow the Typelevel Code of Conduct when discussing Cassie on the Github page or other venues.

Feel free to open an issue if you notice a bug, have an idea for a feature, or have a question about the code. Pull requests are also gladly accepted. For more information, check out the contributor guide.

All code in this repository is licensed under the Apache License, Version 2.0. See LICENCE.txt.