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/*
 * Licensed to STRATIO (C) under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership.  The STRATIO (C) 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 com.stratio.crossdata.server.actors

import akka.actor.{Actor, ActorRef, Props}
import com.stratio.crossdata.common.exceptions.{IgnoreQueryException, ValidationException}
import com.stratio.crossdata.common.result.Result
import com.stratio.crossdata.core.metadata.MetadataManagerException
import com.stratio.crossdata.core.query.{IParsedQuery, IValidatedQuery}
import com.stratio.crossdata.core.validator.Validator
import org.apache.log4j.Logger

object ValidatorActor {
  def props(planner: ActorRef, validator: Validator): Props = Props(new ValidatorActor(planner, validator))
}

/**
 * Actor in charge of the validation of sentences.
 * @param planner The associated planner actor.
 * @param validator The associated com.stratio.com.stratio.crossdata.core.validator.Validator}.
 */
class ValidatorActor(planner: ActorRef, validator: Validator) extends Actor with TimeTracker {

  /**
   * Name of the timer published through JMX.
   */
  override lazy val timerName = this.getClass.getName
  /**
   * Class logger.
   */
  val log = Logger.getLogger(classOf[ValidatorActor])

  override def receive: Receive = {
    case query: IParsedQuery => {
      val timer = initTimer()
      var validatedQuery: IValidatedQuery = null
      try {
        validatedQuery = validator.validate(query)
        log.info("Query validated")
        finishTimer(timer)
        planner forward validatedQuery

      } catch {
        case e: ValidationException => {
          log.info(e.getMessage())
          val result = Result.createValidationErrorResult(e)
          result.setQueryId(query.getQueryId)
          sender ! result
        }
        case e2: MetadataManagerException => {
          val result = Result.createExecutionErrorResult(e2.getMessage)
          result.setQueryId(query.getQueryId)
          sender ! result
        }
        case e3: IgnoreQueryException => {
          val result = Result.createExecutionErrorResult(e3.getMessage)
          result.setQueryId(query.getQueryId)
          sender ! result
        }
      }
    }
    case unknown: Any => {
      log.error(unknown);
      sender ! Result.createUnsupportedOperationErrorResult("Message not recognized")
    }
  }
}




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