integration/spark/src/test/scala/org/apache/carbondata/spark/util/GlobalDictionaryUtilConcurrentTestCase.scala

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package org.apache.carbondata.spark.util

import java.util.concurrent.{Callable, Executors}

import scala.collection.mutable.ListBuffer

import org.apache.carbondata.common.logging.LogServiceFactory
import org.apache.spark.sql.test.util.QueryTest
import org.apache.spark.sql.{CarbonEnv, CarbonRelation}
import org.scalatest.BeforeAndAfterAll

import org.apache.carbondata.core.cache.dictionary.DictionaryColumnUniqueIdentifier
import org.apache.carbondata.core.service.impl.PathFactory
import org.apache.carbondata.core.constants.CarbonCommonConstants
import org.apache.carbondata.core.datastore.impl.FileFactory
import org.apache.carbondata.core.util.CarbonProperties
import org.apache.carbondata.core.util.path.CarbonStorePath
import org.apache.carbondata.processing.util.TableOptionConstant
import org.apache.carbondata.processing.loading.model.{CarbonDataLoadSchema, CarbonLoadModel}

class GlobalDictionaryUtilConcurrentTestCase extends QueryTest with BeforeAndAfterAll {

  var sampleRelation: CarbonRelation = _

  def buildCarbonLoadModel(relation: CarbonRelation,
                           filePath: String,
                           header: String): CarbonLoadModel = {
    val carbonLoadModel = new CarbonLoadModel
    carbonLoadModel.setTableName(relation.tableMeta.carbonTableIdentifier.getDatabaseName)
    carbonLoadModel.setDatabaseName(relation.tableMeta.carbonTableIdentifier.getTableName)
    // carbonLoadModel.setSchema(relation.cubeMeta.schema)
    val table = relation.tableMeta.carbonTable
    val carbonSchema = new CarbonDataLoadSchema(table)
    carbonLoadModel.setDatabaseName(table.getDatabaseName)
    carbonLoadModel.setTableName(table.getFactTableName)
    carbonLoadModel.setCarbonDataLoadSchema(carbonSchema)
    carbonLoadModel.setFactFilePath(filePath)
    carbonLoadModel.setCsvHeader(header)
    carbonLoadModel.setCsvDelimiter(",")
    carbonLoadModel.setComplexDelimiterLevel1("\\$")
    carbonLoadModel.setComplexDelimiterLevel2("\\:")
    carbonLoadModel.setStorePath(relation.tableMeta.storePath)
    carbonLoadModel.setQuoteChar("\"")
    carbonLoadModel.setSerializationNullFormat(
      TableOptionConstant.SERIALIZATION_NULL_FORMAT.getName + ",\\N")
    carbonLoadModel.setDefaultTimestampFormat(CarbonProperties.getInstance().getProperty(
      CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT,
      CarbonCommonConstants.CARBON_TIMESTAMP_DEFAULT_FORMAT))
    carbonLoadModel.setDefaultDateFormat(CarbonProperties.getInstance().getProperty(
      CarbonCommonConstants.CARBON_DATE_FORMAT,
      CarbonCommonConstants.CARBON_DATE_DEFAULT_FORMAT))  
    carbonLoadModel.setCsvHeaderColumns(CommonUtil.getCsvHeaderColumns(carbonLoadModel))
    carbonLoadModel.setMaxColumns("2000")
    carbonLoadModel
  }

  override def beforeAll {
    // second time comment this line
    buildTable
    buildRelation
  }

  def buildTable() = {
    try {
      sql(
        "CREATE TABLE IF NOT EXISTS employee (empid STRING) STORED BY 'org.apache.carbondata.format' " +
          "tblproperties('dictionary_include'='empid')")
    } catch {
      case ex: Throwable => LOGGER.error(ex.getMessage + "\r\n" + ex.getStackTraceString)
    }
  }

  def buildRelation() = {
    val catalog = CarbonEnv.get.carbonMetastore
    sampleRelation = catalog.lookupRelation1(Option(CarbonCommonConstants.DATABASE_DEFAULT_NAME),
      "employee")(sqlContext)
      .asInstanceOf[CarbonRelation]
  }

  def writedummydata(filePath: String, recCount: Int) = {
    var a: Int = 0
    var records: StringBuilder = StringBuilder.newBuilder
    for (a <- 0 to recCount) {
      records.append(a).append("\n")
    }
    val dis = FileFactory.getDataOutputStream(filePath, FileFactory.getFileType(filePath))
    dis.writeBytes(records.toString())
    dis.close()
  }

  test("concurrent dictionary generation") {
    CarbonProperties.getInstance.addProperty(CarbonCommonConstants.MAX_QUERY_EXECUTION_TIME, "-1")
    val noOfFiles = 5
    val files = new ListBuffer[String]()
    val loadModels = new ListBuffer[CarbonLoadModel]()
    for (i <- 0 until noOfFiles) {
      val filePath: String = s"${integrationPath}/spark/target/singlecolumn_${10 * (i + 1)}.csv"
      files += filePath
      loadModels += buildCarbonLoadModel(sampleRelation, filePath, "empid")
      writedummydata(filePath, 10 * (i + 1))
    }
    try {
      val dictGenerators = new java.util.ArrayList[Callable[String]](noOfFiles)
      for (i <- 0 until noOfFiles) {
        dictGenerators.add(new DictGenerator(loadModels(i)))
      }
      val executorService = Executors.newFixedThreadPool(10)
      val results = executorService.invokeAll(dictGenerators)
      for (i <- 0 until noOfFiles) {
        val res = results.get(i).get
        assert("Pass".equals(res))
      }
    } catch {
      case ex: Exception =>
        ex.printStackTrace()
        assert(false)
    }
    val carbonTableIdentifier = sampleRelation.tableMeta.carbonTable.getCarbonTableIdentifier
    val columnIdentifier = sampleRelation.tableMeta.carbonTable.getDimensionByName("employee", "empid").getColumnIdentifier
    val dictionaryColumnUniqueIdentifier = new DictionaryColumnUniqueIdentifier(
      carbonTableIdentifier,
      columnIdentifier,
      columnIdentifier.getDataType,
      CarbonStorePath.getCarbonTablePath(storeLocation, carbonTableIdentifier))
    val carbonTablePath = PathFactory.getInstance()
        .getCarbonTablePath(sampleRelation.tableMeta.storePath, carbonTableIdentifier, dictionaryColumnUniqueIdentifier)
    val dictPath = carbonTablePath.getDictionaryFilePath(columnIdentifier.getColumnId)
    val dictFile = FileFactory.getCarbonFile(dictPath, FileFactory.getFileType(dictPath))
    val offSet = dictFile.getSize
    val sortIndexPath = carbonTablePath.getSortIndexFilePath(columnIdentifier.getColumnId, offSet)
    val sortIndexFile = FileFactory.getCarbonFile(sortIndexPath, FileFactory.getFileType(sortIndexPath))
    assert(sortIndexFile.exists())
    val sortIndexFiles = carbonTablePath.getSortIndexFiles(sortIndexFile.getParentFile, columnIdentifier.getColumnId)
    assert(sortIndexFiles.length >= 1)
    deleteFiles(files)
  }

  def deleteFiles(files: ListBuffer[String]) {
    for (i <- 0 until files.length) {
      val file = FileFactory.getCarbonFile(files(i), FileFactory.getFileType(files(i)))
      file.delete()
    }
  }

  override def afterAll {
    sql("drop table if exists employee")
    CarbonProperties.getInstance.addProperty(CarbonCommonConstants.MAX_QUERY_EXECUTION_TIME,
        Integer.toString(CarbonCommonConstants.DEFAULT_MAX_QUERY_EXECUTION_TIME))
  }

  class DictGenerator(loadModel: CarbonLoadModel) extends Callable[String] {
   override def call:String = {
     var result = "Pass"
      try {
        GlobalDictionaryUtil
          .generateGlobalDictionary(sqlContext,
            loadModel,
            sampleRelation.tableMeta.storePath)
      } catch {
        case ex: Exception => 
          result = ex.getMessage
          ex.printStackTrace()
      }
      result
    }
  }
}