shark.execution.serialization.HiveConfPersistenceDelegate.scala Maven / Gradle / Ivy
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/*
* Copyright (C) 2012 The Regents of The University California.
* All rights reserved.
*
* 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 shark.execution.serialization
import java.beans.{Statement, Encoder, DefaultPersistenceDelegate}
import scala.collection.JavaConversions._
import org.apache.hadoop.hive.conf.HiveConf
import org.apache.commons.lang.ObjectUtils
class HiveConfPersistenceDelegate extends DefaultPersistenceDelegate {
override protected def initialize(clazz: Class[_], oldInst: AnyRef, newInst: AnyRef, out: Encoder)
{
val oldConf = oldInst.asInstanceOf[HiveConf]
val newConf = newInst.asInstanceOf[HiveConf]
if (!ObjectUtils.equals(oldConf.getAuxJars, newConf.getAuxJars)) {
out.writeStatement(new Statement(oldInst, "setAuxJars", Array(oldConf.getAuxJars)))
}
val oldConfProps = oldConf.getAllProperties
val newConfProps = newConf.getAllProperties
val propsToDelete = newConfProps.filter { case(k, v) => !oldConfProps.containsKey(k) }
val propsToAdd = oldConf.getAllProperties.filter { case(k, v) =>
!newConfProps.containsKey(k) || !ObjectUtils.equals(newConfProps.get(k), v)
}
propsToDelete.foreach { case(k, v) =>
out.writeStatement(new Statement(oldInst, "unset", Array(k)))
}
propsToAdd.foreach { case(k, v) =>
out.writeStatement(new Statement(oldInst, "set", Array(k, v)))
}
}
}