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Typeclasses, Monads, etc. Functional programming in Scala can be simple!

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Cassandra Client for Scala

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“The plan” • Typeclasses - code reuse • Actors - asynchronousness and self-healing • Monads - composition and reasoning

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• Keyspace =~ db schema • Column family =~ db table

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Operations on rows

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Implicit keyspace

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Operations on objects

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Typeclasses Demo

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Typeclasses summary Numeric[T] Serializable[T]

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Actors

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JVM Cassandra Actor Router Actor Cassandra Actor Connection Cassandra Get(...) Cassandra Actor Connection Cassandra Actor Connection

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Blocking vs Non-blocking

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Akka Demo

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Actors API

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Composition

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Composition Demo

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Monads summary

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Questions? Peter Gabryanczyk @piotrga [email protected] http://blog.scala4java.com We are hiring!