com.datamountaineer.streamreactor.connect.elastic.ElasticSinkTask.scala Maven / Gradle / Ivy
/*
* Copyright 2017 Datamountaineer.
*
* Licensed 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 com.datamountaineer.streamreactor.connect.elastic
import java.util
import com.datamountaineer.streamreactor.connect.elastic.config.{ElasticConfig, ElasticConfigConstants}
import com.datamountaineer.streamreactor.connect.utils.ProgressCounter
import com.typesafe.scalalogging.slf4j.StrictLogging
import org.apache.kafka.clients.consumer.OffsetAndMetadata
import org.apache.kafka.common.TopicPartition
import org.apache.kafka.connect.sink.{SinkRecord, SinkTask}
import scala.collection.JavaConversions._
class ElasticSinkTask extends SinkTask with StrictLogging {
private var writer: Option[ElasticJsonWriter] = None
private val progressCounter = new ProgressCounter
private var enableProgress: Boolean = false
/**
* Parse the configurations and setup the writer
**/
override def start(props: util.Map[String, String]): Unit = {
logger.info(scala.io.Source.fromInputStream(getClass.getResourceAsStream("/elastic-ascii.txt")).mkString + s" v $version")
ElasticConfig.config.parse(props)
val sinkConfig = ElasticConfig(props)
enableProgress = sinkConfig.getBoolean(ElasticConfigConstants.PROGRESS_COUNTER_ENABLED)
writer = Some(ElasticWriter(config = sinkConfig, context = context))
}
/**
* Pass the SinkRecords to the writer for Writing
**/
override def put(records: util.Collection[SinkRecord]): Unit = {
require(writer.nonEmpty, "Writer is not set!")
writer.foreach(w => w.write(records.toSet))
val seq = records.toVector
if (enableProgress) {
progressCounter.update(seq)
}
}
/**
* Clean up writer
**/
override def stop(): Unit = {
logger.info("Stopping Elastic sink.")
writer.foreach(w => w.close())
progressCounter.empty
}
override def flush(map: util.Map[TopicPartition, OffsetAndMetadata]): Unit = {
logger.info("Flushing Elastic Sink")
}
override def version: String = Option(getClass.getPackage.getImplementationVersion).getOrElse("")
}