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Merged
merged 4 commits into from
Apr 26, 2021
Merged

Feature: more KeyValueGroupedDataset wrapper functions #81

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a309303
added missing function wrappers for KeyValueGroupedDataset and cogrou…
Jolanrensen Feb 25, 2021
f8c959e
Merge branch 'master' into missing_KeyValueGroupedDataset_functions
Jolanrensen Apr 26, 2021
7db51ee
split up the tests into separate ones
Jolanrensen Apr 26, 2021
d360c6f
Merge branch 'master' into missing_KeyValueGroupedDataset_functions
Jolanrensen Apr 26, 2021
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56 changes: 56 additions & 0 deletions kotlin-spark-api/2.4/src/main/kotlin/org/jetbrains/kotlinx/spark/api/ApiV1.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,9 @@ import org.apache.spark.sql.catalyst.JavaTypeInference
import org.apache.spark.sql.catalyst.KotlinReflection
import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
import org.apache.spark.sql.catalyst.expressions.Expression
import org.apache.spark.sql.streaming.GroupState
import org.apache.spark.sql.streaming.GroupStateTimeout
import org.apache.spark.sql.streaming.OutputMode
import org.apache.spark.sql.types.*
import org.jetbrains.kotlinx.spark.extensions.KSparkExtensions
import scala.collection.Seq
Expand All @@ -42,6 +45,7 @@ import java.time.Instant
import java.time.LocalDate
import java.util.concurrent.ConcurrentHashMap
import kotlin.reflect.KClass
import kotlin.reflect.KProperty
import kotlin.reflect.KType
import kotlin.reflect.full.findAnnotation
import kotlin.reflect.full.isSubclassOf
Expand Down Expand Up @@ -159,6 +163,58 @@ inline fun <reified KEY, reified VALUE> KeyValueGroupedDataset<KEY, VALUE>.reduc
reduceGroups(ReduceFunction(func))
.map { t -> t._1 to t._2 }

inline fun <K, V, reified U> KeyValueGroupedDataset<K, V>.flatMapGroups(
noinline func: (key: K, values: Iterator<V>) -> Iterator<U>
): Dataset<U> = flatMapGroups(
FlatMapGroupsFunction(func),
encoder<U>()
)

fun <S> GroupState<S>.getOrNull(): S? = if (exists()) get() else null

operator fun <S> GroupState<S>.getValue(thisRef: Any?, property: KProperty<*>): S? = getOrNull()
operator fun <S> GroupState<S>.setValue(thisRef: Any?, property: KProperty<*>, value: S?): Unit = update(value)


inline fun <K, V, reified S, reified U> KeyValueGroupedDataset<K, V>.mapGroupsWithState(
noinline func: (key: K, values: Iterator<V>, state: GroupState<S>) -> U
): Dataset<U> = mapGroupsWithState(
MapGroupsWithStateFunction(func),
encoder<S>(),
encoder<U>()
)

inline fun <K, V, reified S, reified U> KeyValueGroupedDataset<K, V>.mapGroupsWithState(
timeoutConf: GroupStateTimeout,
noinline func: (key: K, values: Iterator<V>, state: GroupState<S>) -> U
): Dataset<U> = mapGroupsWithState(
MapGroupsWithStateFunction(func),
encoder<S>(),
encoder<U>(),
timeoutConf
)

inline fun <K, V, reified S, reified U> KeyValueGroupedDataset<K, V>.flatMapGroupsWithState(
outputMode: OutputMode,
timeoutConf: GroupStateTimeout,
noinline func: (key: K, values: Iterator<V>, state: GroupState<S>) -> Iterator<U>
): Dataset<U> = flatMapGroupsWithState(
FlatMapGroupsWithStateFunction(func),
outputMode,
encoder<S>(),
encoder<U>(),
timeoutConf
)

inline fun <K, V, U, reified R> KeyValueGroupedDataset<K, V>.cogroup(
other: KeyValueGroupedDataset<K, U>,
noinline func: (key: K, left: Iterator<V>, right: Iterator<U>) -> Iterator<R>
): Dataset<R> = cogroup(
other,
CoGroupFunction(func),
encoder<R>()
)

inline fun <T, reified R> Dataset<T>.downcast(): Dataset<R> = `as`(encoder<R>())
inline fun <reified R> Dataset<*>.`as`(): Dataset<R> = `as`(encoder<R>())
inline fun <reified R> Dataset<*>.to(): Dataset<R> = `as`(encoder<R>())
Expand Down
73 changes: 73 additions & 0 deletions kotlin-spark-api/2.4/src/test/kotlin/org/jetbrains/kotlinx/spark/api/ApiTest.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,9 @@ import ch.tutteli.atrium.api.fluent.en_GB.*
import ch.tutteli.atrium.domain.builders.migration.asExpect
import ch.tutteli.atrium.verbs.expect
import io.kotest.core.spec.style.ShouldSpec
import io.kotest.matchers.shouldBe
import org.apache.spark.sql.streaming.GroupState
import org.apache.spark.sql.streaming.GroupStateTimeout
import java.io.Serializable
import java.time.LocalDate

Expand Down Expand Up @@ -156,6 +159,76 @@ class ApiTest : ShouldSpec({

expect(result).asExpect().contains.inOrder.only.values(3, 5, 7, 9, 11)
}
should("perform operations on grouped datasets") {
val groupedDataset = listOf(1 to "a", 1 to "b", 2 to "c")
.toDS()
.groupByKey { it.first }

val flatMapped = groupedDataset.flatMapGroups { key, values ->
val collected = values.asSequence().toList()

if (collected.size > 1) collected.iterator()
else emptyList<Pair<Int, String>>().iterator()
}

flatMapped.count() shouldBe 2

val mappedWithStateTimeoutConf = groupedDataset.mapGroupsWithState(GroupStateTimeout.NoTimeout()) { key, values, state: GroupState<Int> ->
var s by state
val collected = values.asSequence().toList()

s = key
s shouldBe key

s!! to collected.map { it.second }
}

mappedWithStateTimeoutConf.count() shouldBe 2

val mappedWithState = groupedDataset.mapGroupsWithState { key, values, state: GroupState<Int> ->
var s by state
val collected = values.asSequence().toList()

s = key
s shouldBe key

s!! to collected.map { it.second }
}

mappedWithState.count() shouldBe 2

val flatMappedWithState = groupedDataset.mapGroupsWithState { key, values, state: GroupState<Int> ->
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@asm0dey asm0dey Apr 26, 2021

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Shouldn't these be moved to separate tests?

var s by state
val collected = values.asSequence().toList()

s = key
s shouldBe key

if (collected.size > 1) collected.iterator()
else emptyList<Pair<Int, String>>().iterator()
}

flatMappedWithState.count() shouldBe 2
}
should("be able to cogroup grouped datasets") {
val groupedDataset1 = listOf(1 to "a", 1 to "b", 2 to "c")
.toDS()
.groupByKey { it.first }

val groupedDataset2 = listOf(1 to "d", 5 to "e", 3 to "f")
.toDS()
.groupByKey { it.first }

val cogrouped = groupedDataset1.cogroup(groupedDataset2) { key, left, right ->
listOf(
key to (left.asSequence() + right.asSequence())
.map { it.second }
.toList()
).iterator()
}

cogrouped.count() shouldBe 4
}
}
}
})
Expand Down
56 changes: 56 additions & 0 deletions kotlin-spark-api/3.0/src/main/kotlin/org/jetbrains/kotlinx/spark/api/ApiV1.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,9 @@ import org.apache.spark.broadcast.Broadcast
import org.apache.spark.sql.*
import org.apache.spark.sql.Encoders.*
import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
import org.apache.spark.sql.streaming.GroupState
import org.apache.spark.sql.streaming.GroupStateTimeout
import org.apache.spark.sql.streaming.OutputMode
import org.apache.spark.sql.types.*
import org.jetbrains.kotinx.spark.extensions.KSparkExtensions
import scala.reflect.ClassTag
Expand All @@ -38,6 +41,7 @@ import java.time.Instant
import java.time.LocalDate
import java.util.concurrent.ConcurrentHashMap
import kotlin.reflect.KClass
import kotlin.reflect.KProperty
import kotlin.reflect.KType
import kotlin.reflect.full.findAnnotation
import kotlin.reflect.full.isSubclassOf
Expand Down Expand Up @@ -149,6 +153,58 @@ inline fun <reified KEY, reified VALUE> KeyValueGroupedDataset<KEY, VALUE>.reduc
reduceGroups(ReduceFunction(func))
.map { t -> t._1 to t._2 }

inline fun <K, V, reified U> KeyValueGroupedDataset<K, V>.flatMapGroups(
noinline func: (key: K, values: Iterator<V>) -> Iterator<U>
): Dataset<U> = flatMapGroups(
FlatMapGroupsFunction(func),
encoder<U>()
)

fun <S> GroupState<S>.getOrNull(): S? = if (exists()) get() else null

operator fun <S> GroupState<S>.getValue(thisRef: Any?, property: KProperty<*>): S? = getOrNull()
operator fun <S> GroupState<S>.setValue(thisRef: Any?, property: KProperty<*>, value: S?): Unit = update(value)


inline fun <K, V, reified S, reified U> KeyValueGroupedDataset<K, V>.mapGroupsWithState(
noinline func: (key: K, values: Iterator<V>, state: GroupState<S>) -> U
): Dataset<U> = mapGroupsWithState(
MapGroupsWithStateFunction(func),
encoder<S>(),
encoder<U>()
)

inline fun <K, V, reified S, reified U> KeyValueGroupedDataset<K, V>.mapGroupsWithState(
timeoutConf: GroupStateTimeout,
noinline func: (key: K, values: Iterator<V>, state: GroupState<S>) -> U
): Dataset<U> = mapGroupsWithState(
MapGroupsWithStateFunction(func),
encoder<S>(),
encoder<U>(),
timeoutConf
)

inline fun <K, V, reified S, reified U> KeyValueGroupedDataset<K, V>.flatMapGroupsWithState(
outputMode: OutputMode,
timeoutConf: GroupStateTimeout,
noinline func: (key: K, values: Iterator<V>, state: GroupState<S>) -> Iterator<U>
): Dataset<U> = flatMapGroupsWithState(
FlatMapGroupsWithStateFunction(func),
outputMode,
encoder<S>(),
encoder<U>(),
timeoutConf
)

inline fun <K, V, U, reified R> KeyValueGroupedDataset<K, V>.cogroup(
other: KeyValueGroupedDataset<K, U>,
noinline func: (key: K, left: Iterator<V>, right: Iterator<U>) -> Iterator<R>
): Dataset<R> = cogroup(
other,
CoGroupFunction(func),
encoder<R>()
)

inline fun <T, reified R> Dataset<T>.downcast(): Dataset<R> = `as`(encoder<R>())
inline fun <reified R> Dataset<*>.`as`(): Dataset<R> = `as`(encoder<R>())
inline fun <reified R> Dataset<*>.to(): Dataset<R> = `as`(encoder<R>())
Expand Down
73 changes: 73 additions & 0 deletions kotlin-spark-api/3.0/src/test/kotlin/org/jetbrains/kotlinx/spark/api/ApiTest.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,9 @@ import ch.tutteli.atrium.api.fluent.en_GB.*
import ch.tutteli.atrium.domain.builders.migration.asExpect
import ch.tutteli.atrium.verbs.expect
import io.kotest.core.spec.style.ShouldSpec
import io.kotest.matchers.shouldBe
import org.apache.spark.sql.streaming.GroupState
import org.apache.spark.sql.streaming.GroupStateTimeout
import java.io.Serializable
import java.time.LocalDate

Expand Down Expand Up @@ -169,6 +172,76 @@ class ApiTest : ShouldSpec({

expect(result).asExpect().contains.inOrder.only.values(3, 5, 7, 9, 11)
}
should("perform operations on grouped datasets") {
val groupedDataset = listOf(1 to "a", 1 to "b", 2 to "c")
.toDS()
.groupByKey { it.first }

val flatMapped = groupedDataset.flatMapGroups { key, values ->
val collected = values.asSequence().toList()

if (collected.size > 1) collected.iterator()
else emptyList<Pair<Int, String>>().iterator()
}

flatMapped.count() shouldBe 2

val mappedWithStateTimeoutConf = groupedDataset.mapGroupsWithState(GroupStateTimeout.NoTimeout()) { key, values, state: GroupState<Int> ->
var s by state
val collected = values.asSequence().toList()

s = key
s shouldBe key

s!! to collected.map { it.second }
}

mappedWithStateTimeoutConf.count() shouldBe 2

val mappedWithState = groupedDataset.mapGroupsWithState { key, values, state: GroupState<Int> ->
var s by state
val collected = values.asSequence().toList()

s = key
s shouldBe key

s!! to collected.map { it.second }
}

mappedWithState.count() shouldBe 2

val flatMappedWithState = groupedDataset.mapGroupsWithState { key, values, state: GroupState<Int> ->
var s by state
val collected = values.asSequence().toList()

s = key
s shouldBe key

if (collected.size > 1) collected.iterator()
else emptyList<Pair<Int, String>>().iterator()
}

flatMappedWithState.count() shouldBe 2
}
should("be able to cogroup grouped datasets") {
val groupedDataset1 = listOf(1 to "a", 1 to "b", 2 to "c")
.toDS()
.groupByKey { it.first }

val groupedDataset2 = listOf(1 to "d", 5 to "e", 3 to "f")
.toDS()
.groupByKey { it.first }

val cogrouped = groupedDataset1.cogroup(groupedDataset2) { key, left, right ->
listOf(
key to (left.asSequence() + right.asSequence())
.map { it.second }
.toList()
).iterator()
}

cogrouped.count() shouldBe 4
}
}
}
})
Expand Down