com.datamountaineer.streamreactor.connect.pulsar.source.PulsarSourceConnector.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.pulsar.source
import java.util
import java.util.Collections
import com.datamountaineer.streamreactor.connect.config.Helpers
import com.datamountaineer.streamreactor.connect.pulsar.config.{PulsarConfigConstants, PulsarSourceConfig, PulsarSourceSettings}
import com.datamountaineer.streamreactor.connect.utils.JarManifest
import com.typesafe.scalalogging.slf4j.StrictLogging
import org.apache.kafka.common.config.ConfigDef
import org.apache.kafka.connect.connector.Task
import org.apache.kafka.connect.source.SourceConnector
import scala.collection.JavaConverters._
import scala.collection.JavaConversions._
class PulsarSourceConnector extends SourceConnector with StrictLogging {
private val configDef = PulsarSourceConfig.config
private var configProps: util.Map[String, String] = _
private val manifest = JarManifest(getClass.getProtectionDomain.getCodeSource.getLocation)
/**
* States which SinkTask class to use
**/
override def taskClass(): Class[_ <: Task] = classOf[PulsarSourceTask]
/**
* Set the configuration for each work and determine the split
*
* @param maxTasks The max number of task workers be can spawn
* @return a List of configuration properties per worker
**/
override def taskConfigs(maxTasks: Int): util.List[util.Map[String, String]] = {
logger.info(s"Setting task configurations for $maxTasks workers.")
// call settings here makes sure we don't have an exclusive subscription over more than one worker
PulsarSourceSettings(PulsarSourceConfig(configProps), maxTasks)
// distribute all kcqls to all workers and let the Pulsar subscription type handle the routing
(1 to maxTasks).map(_ => configProps).toList
}
/**
* Start the sink and set to configuration
*
* @param props A map of properties for the connector and worker
**/
override def start(props: util.Map[String, String]): Unit = {
logger.info(s"Starting Pulsar source connector.")
configProps = props
}
override def stop(): Unit = {}
override def config(): ConfigDef = configDef
override def version(): String = manifest.version()
}