com.pagerduty.eris.mapper.ErisResultAdapter.scala Maven / Gradle / Ivy

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/*
 * Copyright (c) 2015, PagerDuty
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions
 * and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided with
 * the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.pagerduty.eris.mapper

import java.nio.ByteBuffer

import com.netflix.astyanax.Serializer
import com.netflix.astyanax.model.{Column, ColumnList}
import com.pagerduty.mapper.{EntityMapperException, ResultAdapter}
import scala.util.control.NonFatal

/**
 * Eris implementation of [[ResultAdapter]]
 */
private[mapper] class ErisResultAdapter(result: ColumnList[String]) extends ResultAdapter {
  private def deserialize(targetId: Any, colName: String, serializer: Any, column: Column[String])
  : Any = {
    try {
      val usableSerializer = serializer.asInstanceOf[Serializer[Any]]
      column.getValue(usableSerializer)
    }
    catch { // Adding columnName to exception message to simplify debugging.
      case e: ClassCastException =>
        throw new EntityMapperException(
          s"Incompatible serializer class for column '$colName'.", e)
      case NonFatal(e) =>
        throw new EntityMapperException(
          s"Exception when de-serializing value for column '$colName' for entity '$targetId'.", e)
    }
  }
  override def get(targetId: Any, colName: String, serializer: Any): Option[Any] = {
    Option(result.getColumnByName(colName)).map { column =>
      deserialize(targetId, colName, serializer, column)
    }
  }
}