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23 changes: 23 additions & 0 deletions
23
cassandra/src/main/scala/akka/stream/alpakka/cassandra/GuavaFutures.scala
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/* | ||
* Copyright (C) 2016 Lightbend Inc. <http://www.lightbend.com> | ||
*/ | ||
package akka.stream.alpakka.cassandra | ||
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import com.google.common.util.concurrent.{ FutureCallback, Futures, ListenableFuture } | ||
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import scala.concurrent.{ Future, Promise } | ||
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private[cassandra] object GuavaFutures { | ||
implicit final class GuavaFutureOpts[A](val guavaFut: ListenableFuture[A]) extends AnyVal { | ||
def asScala(): Future[A] = { | ||
val p = Promise[A]() | ||
val callback = new FutureCallback[A] { | ||
override def onSuccess(a: A): Unit = p.success(a) | ||
override def onFailure(err: Throwable): Unit = p.failure(err) | ||
} | ||
Futures.addCallback(guavaFut, callback) | ||
p.future | ||
} | ||
} | ||
} | ||
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30 changes: 30 additions & 0 deletions
30
cassandra/src/main/scala/akka/stream/alpakka/cassandra/javadsl/CassandraSink.scala
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/* | ||
* Copyright (C) 2016 Lightbend Inc. <http://www.lightbend.com> | ||
*/ | ||
package akka.stream.alpakka.cassandra.javadsl | ||
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import java.util.concurrent.CompletionStage | ||
import java.util.function.BiFunction | ||
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import akka.Done | ||
import akka.stream.javadsl.Sink | ||
import com.datastax.driver.core.{ BoundStatement, PreparedStatement, Session } | ||
import akka.stream.alpakka.cassandra.scaladsl.{ CassandraSink => ScalaCSink } | ||
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import scala.compat.java8.FutureConverters._ | ||
import scala.concurrent.ExecutionContext | ||
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object CassandraSink { | ||
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def create[T](parallelism: Int, | ||
statement: PreparedStatement, | ||
statementBinder: BiFunction[T, PreparedStatement, BoundStatement], | ||
session: Session, | ||
executionContext: ExecutionContext): Sink[T, CompletionStage[Done]] = { | ||
val sink = | ||
ScalaCSink.apply[T](parallelism, statement, (t, p) => statementBinder.apply(t, p))(session, executionContext) | ||
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sink.mapMaterializedValue(_.toJava).asJava | ||
} | ||
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} |
23 changes: 23 additions & 0 deletions
23
cassandra/src/main/scala/akka/stream/alpakka/cassandra/scaladsl/CassandraSink.scala
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/* | ||
* Copyright (C) 2016 Lightbend Inc. <http://www.lightbend.com> | ||
*/ | ||
package akka.stream.alpakka.cassandra.scaladsl | ||
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import akka.Done | ||
import akka.stream.scaladsl.{ Flow, Keep, Sink } | ||
import com.datastax.driver.core.{ BoundStatement, PreparedStatement, Session } | ||
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import scala.concurrent.{ ExecutionContext, Future } | ||
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import akka.stream.alpakka.cassandra.GuavaFutures._ | ||
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object CassandraSink { | ||
def apply[T](parallelism: Int, | ||
statement: PreparedStatement, | ||
statementBinder: (T, PreparedStatement) => BoundStatement)( | ||
implicit session: Session, | ||
ex: ExecutionContext): Sink[T, Future[Done]] = | ||
Flow[T] | ||
.mapAsyncUnordered(parallelism)(t ⇒ session.executeAsync(statementBinder(t, statement)).asScala()) | ||
.toMat(Sink.ignore)(Keep.right) | ||
} |
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