core/src/main/scala/kafka/common/MessageReader.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 kafka.common

import java.io.InputStream
import java.util.Properties

import org.apache.kafka.clients.producer.ProducerRecord

/**
  * Typical implementations of this interface convert data from an `InputStream` received via `init` into a
  * `ProducerRecord` instance on each invocation of `readMessage`.
  *
  * This is used by the `ConsoleProducer`.
  */
trait MessageReader {

  def init(inputStream: InputStream, props: Properties) {}

  def readMessage(): ProducerRecord[Array[Byte], Array[Byte]]

  def close() {}

}