Github user budde commented on a diff in the pull request: https://github.com/apache/spark/pull/17250#discussion_r105806364 --- Diff: external/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisDStream.scala --- @@ -0,0 +1,559 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.streaming.kinesis + +import scala.reflect.ClassTag + +import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream +import com.amazonaws.services.kinesis.model.Record + +import org.apache.spark.annotation.InterfaceStability +import org.apache.spark.storage.StorageLevel +import org.apache.spark.streaming.{Duration, StreamingContext} +import org.apache.spark.streaming.api.java.JavaStreamingContext + +@InterfaceStability.Stable +object KinesisDStream { + /** + * Builder for [[KinesisInputDStream]] instances. + * + * @param ssc StreamingContext to be used for creating DStreams + * @param streamName Name of Kinesis stream + * @param messageHandler Function for extracting DStream data type from KCL Record + * + * @since 2.2.0 + */ + @InterfaceStability.Stable + class Builder[T: ClassTag]( + ssc: StreamingContext, + streamName: String, + messageHandler: Record => T) { + private var endpointUrl = DEFAULT_KINESIS_ENDPOINT_URL + private var regionName = DEFAULT_KINESIS_REGION_NAME + private var initialPositionInStream = DEFAULT_INITIAL_POSITION_IN_STREAM + private var checkpointAppName = ssc.sparkContext.appName + private var checkpointInterval = ssc.graph.batchDuration + private var storageLevel = DEFAULT_STORAGE_LEVEL + private var kinesisCredsProvider: SerializableCredentialsProvider = DefaultCredentialsProvider + private var dynamoDBCredsProvider: Option[SerializableCredentialsProvider] = None + private var cloudWatchCredsProvider: Option[SerializableCredentialsProvider] = None + + /** + * Sets the AWS Kinesis endpoint URL. Defaults to "https://kinesis.us-east-1.amazonaws.com" if + * no custom value is specified --- End diff -- I'll take a look and see. To be honest supplying both of these has always felt pretty redundant to me. The AWS SDK has changed a bit in how it handles endpoints and regions as well, so it may also be worth revisiting how ```KinesisReceiver``` uses these params. Long term, it may also be nice to allow for different endpoints to be specified for Kinesis, DynamoDB and CloudWatch (I think the KCL should support this...)
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