streaming.core.compositor.spark.persist.UnpersistCompositor.scala Maven / Gradle / Ivy
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* 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,
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package streaming.core.compositor.spark.persist
import java.util
import org.apache.log4j.Logger
import serviceframework.dispatcher.{Compositor, Processor, Strategy}
import streaming.core.CompositorHelper
import scala.collection.JavaConversions._
class UnpersistCompositor[T] extends Compositor[T] with CompositorHelper {
private var _configParams: util.List[util.Map[Any, Any]] = _
val logger = Logger.getLogger(classOf[UnpersistCompositor[T]].getName)
override def initialize(typeFilters: util.List[String], configParams: util.List[util.Map[Any, Any]]): Unit = {
this._configParams = configParams
}
def tableName = {
config[String]("tableName", _configParams)
}
def blocking = {
config[Boolean]("blocking", _configParams).getOrElse(false)
}
override def result(alg: util.List[Processor[T]], ref: util.List[Strategy[T]], middleResult: util.List[T], params: util.Map[Any, Any]): util.List[T] = {
require(tableName.isDefined, "please set tableName by variable `tableName` in config file")
sparkSession(params).table(tableName.get).unpersist(blocking)
List()
}
}