https://github.com/reactivecore/cassandra_caseclass_adapter

Automatic Adapter for Scala Case classes to Java Cassandra Driver
https://github.com/reactivecore/cassandra_caseclass_adapter

cassandra converter scala typeclass

Last synced: about 1 month ago
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Automatic Adapter for Scala Case classes to Java Cassandra Driver

• Host: GitHub
• URL: https://github.com/reactivecore/cassandra_caseclass_adapter
• Owner: reactivecore
• License: other
• Archived: true
• Created: 2017-04-12T17:56:03.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2020-11-24T12:24:47.000Z (almost 4 years ago)
• Last Synced: 2024-09-25T21:57:02.507Z (about 1 month ago)
• Topics: cassandra, converter, scala, typeclass
• Language: Scala
• Size: 35.2 KB
• Stars: 4
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: Readme.md
  • License: LICENSE

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README

        
Cassandra Case Class Adapters

=============================

[![Build Status](https://travis-ci.org/reactivecore/cassandra_caseclass_adapter.svg?branch=master)](https://travis-ci.org/reactivecore/cassandra_caseclass_adapter)

Maps Case classes to the Cassandra Java Driver using shapeless powered type classes.

Note: 

* this is in early development stage

* contains weird hacks and class casts

* not API stable

Thanks a lot to the [Shapeless](https://github.com/milessabin/shapeless) team for their wonderful work.

Add Dependency

--------------

Builds are available for Scala 2.11, 2.12 having a dependency to the Cassandra Driver 4.7.2.

Add this to your `build.sbt`:

    libraryDependencies += "net.reactivecore" %% "cassandra-caseclass-adapter" % "0.0.2"

    

If you use Scala 2.10, you also need (see [Shapeless Documentation](https://github.com/milessabin/shapeless#shapeless-232-with-sbt))

    

    libraryDependencies += compilerPlugin("org.scalamacros" % "paradise" % "2.1.0" cross CrossVersion.full)

Usage

-----

Define a case class

    case class Person (

        id: UUID,

        name: String,

        age: Int

      )

      

Have a cassandra table

      

      

      CREATE TABLE persons (

        id UUID,

        name TEXT,

        age INT,

        PRIMARY KEY (id)

      );

      

And let the Adapter automatically generated

      

      import net.reactivecore.cca.CassandraCaseClassAdapter

      val adapter = CassandraCaseClassAdapter.make[Person]("persons")

      val session = // open cassandra session

      val person = Person(UUIDs.random(), "John Doe", 42)

      adapter.insert(person, session)

      

      val back: Seq[Person] = adapter.loadAllFromCassandra(session)

Supported

---------

* boiler plate free `fromRow`, `insert`, `loadAllFromCassandra`

Supported Types

---------------

* Most fundamental types

* Option

* Set of Primitives and of UDT

* List of Primitives (as Seq) and of UDT

* Primitive UDT handling

Not supported / tested yet

--------------------------

* Map

* Tuples

* Combination of Set/Seq with more than one UDT

* Adding custom types

* Prepared Statements for fast insert

Not planned (yet)

-----------------

* Query Helpers

Testing

-------

* The unit tests need a Cassandra Instance running on `127.0.0.1`

* They will recreate a keyspace called `unittest` on each single testcase.