spark JavaPairReceiverInputDStream 源码

2022-10-20
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spark JavaPairReceiverInputDStream 代码

文件路径：/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaPairReceiverInputDStream.scala

/*
 * 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.api.java

import scala.language.implicitConversions
import scala.reflect.ClassTag

import org.apache.spark.streaming.dstream.ReceiverInputDStream

/**
 * A Java-friendly interface to [[org.apache.spark.streaming.dstream.ReceiverInputDStream]], the
 * abstract class for defining any input stream that receives data over the network.
 */
class JavaPairReceiverInputDStream[K, V](val receiverInputDStream: ReceiverInputDStream[(K, V)])
    (implicit override val kClassTag: ClassTag[K], override implicit val vClassTag: ClassTag[V])
  extends JavaPairInputDStream[K, V](receiverInputDStream) {
}

object JavaPairReceiverInputDStream {
  /**
   * Convert a scala [[org.apache.spark.streaming.dstream.ReceiverInputDStream]] to a Java-friendly
   * [[org.apache.spark.streaming.api.java.JavaReceiverInputDStream]].
   */
  implicit def fromReceiverInputDStream[K: ClassTag, V: ClassTag](
      receiverInputDStream: ReceiverInputDStream[(K, V)]): JavaPairReceiverInputDStream[K, V] = {
    new JavaPairReceiverInputDStream[K, V](receiverInputDStream)
  }
}

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