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com.samelamin.spark.bigquery.BigQueryClient.scala Maven / Gradle / Ivy
package com.samelamin.spark.bigquery
import java.math.BigInteger
import java.util.UUID
import java.util.concurrent.TimeUnit
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential
import com.google.api.client.googleapis.json.GoogleJsonResponseException
import com.google.api.client.http.javanet.NetHttpTransport
import com.google.api.client.json.jackson2.JacksonFactory
import com.google.api.services.bigquery.model.{Dataset => BQDataset, _}
import com.google.api.services.bigquery.{Bigquery, BigqueryScopes}
import com.google.cloud.hadoop.io.bigquery._
import com.google.common.cache.{CacheBuilder, CacheLoader, LoadingCache}
import com.google.gson.JsonParser
import com.samelamin.spark.bigquery.utils.{BigQueryPartitionUtils, EnvHacker}
import org.apache.hadoop.util.Progressable
import org.apache.spark.sql._
import org.joda.time.Instant
import org.joda.time.format.DateTimeFormat
import org.slf4j.LoggerFactory
import scala.collection.JavaConverters._
import scala.util.Random
import scala.util.control.NonFatal
/**
* Created by sam elamin on 11/01/2017.
*/
object BigQueryClient {
val TIME_FORMATTER = DateTimeFormat.forPattern("yyyyMMddHHmmss")
private val SCOPES = List(BigqueryScopes.BIGQUERY).asJava
private var instance: BigQueryClient = null
def getInstance(sqlContext: SQLContext): BigQueryClient = {
setGoogleBQEnvVariable(sqlContext)
if (instance == null) {
val bigquery = {
val credential = GoogleCredential.getApplicationDefault.createScoped(SCOPES)
new Bigquery.Builder(new NetHttpTransport, new JacksonFactory, credential)
.setApplicationName("spark-bigquery")
.build()
}
instance = new BigQueryClient(sqlContext,bigquery)
}
instance
}
private def setGoogleBQEnvVariable(sqlContext: SQLContext):Unit = {
val bqKeyPath = sqlContext.sparkContext.hadoopConfiguration.get("fs.gs.auth.service.account.json.keyfile")
if(bqKeyPath != null) {
val myJavaMap = Map[String, String]("GOOGLE_APPLICATION_CREDENTIALS" -> bqKeyPath)
EnvHacker.setEnv(myJavaMap)
}
}
}
class BigQueryClient(sqlContext: SQLContext, var bigquery: Bigquery = null) extends Serializable {
@transient
lazy val jsonParser = new JsonParser()
@transient
val hadoopConf = sqlContext.sparkContext.hadoopConfiguration
val STAGING_DATASET_PREFIX = "bq.staging_dataset.prefix"
val STAGING_DATASET_PREFIX_DEFAULT = "spark_bigquery_staging_"
val STAGING_DATASET_LOCATION = "bq.staging_dataset.location"
val STAGING_DATASET_LOCATION_DEFAULT = "US"
val STAGING_DATASET_TABLE_EXPIRATION_MS = 86400000L
val STAGING_DATASET_DESCRIPTION = "Spark BigQuery staging dataset"
val ALLOW_SCHEMA_UPDATES = "ALLOW_SCHEMA_UPDATES"
val USE_STANDARD_SQL_DIALECT = "USE_STANDARD_SQL_DIALECT"
private val logger = LoggerFactory.getLogger(classOf[BigQueryClient])
private def projectId = hadoopConf.get(BigQueryConfiguration.PROJECT_ID_KEY)
private def inConsole = Thread.currentThread().getStackTrace.exists(
_.getClassName.startsWith("scala.tools.nsc.interpreter."))
private val PRIORITY = if (inConsole) "INTERACTIVE" else "BATCH"
private val TABLE_ID_PREFIX = "spark_bigquery"
private val JOB_ID_PREFIX = "spark_bigquery"
def load(destinationTable: TableReference,
bigQuerySchema: String,
gcsPath: String,
isPartitionedByDay: Boolean = false,
timePartitionExpiration: Long = 0,
writeDisposition: WriteDisposition.Value = null,
createDisposition: CreateDisposition.Value = null): Unit = {
if(isPartitionedByDay) {
BigQueryPartitionUtils.createBigQueryPartitionedTable(destinationTable,timePartitionExpiration)
}
val tableSchema = new TableSchema().setFields(BigQueryUtils.getSchemaFromString(bigQuerySchema))
val allow_schema_updates = hadoopConf.get(ALLOW_SCHEMA_UPDATES,"false").toBoolean
var loadConfig = new JobConfigurationLoad()
.setSchema(tableSchema)
.setDestinationTable(destinationTable)
.setSourceFormat("NEWLINE_DELIMITED_JSON")
.setSourceUris(List(gcsPath + "/*").asJava)
if(allow_schema_updates) {
loadConfig.setSchemaUpdateOptions(List("ALLOW_FIELD_ADDITION", "ALLOW_FIELD_RELAXATION").asJava)
}
if (writeDisposition != null) {
loadConfig = loadConfig.setWriteDisposition(writeDisposition.toString)
}
if (createDisposition != null) {
loadConfig = loadConfig.setCreateDisposition(createDisposition.toString)
}
val jobConfig = new JobConfiguration().setLoad(loadConfig)
val jobReference = createJobReference(projectId, JOB_ID_PREFIX)
val job = new Job().setConfiguration(jobConfig).setJobReference(jobReference)
bigquery.jobs().insert(projectId, job).execute()
waitForJob(job)
}
/**
* Perform a BigQuery SELECT query and save results to a temporary table.
*/
def selectQuery(sqlQuery: String): Unit = {
val tableReference = queryCache.get(sqlQuery)
val fullyQualifiedInputTableId = BigQueryStrings.toString(tableReference)
BigQueryConfiguration.configureBigQueryInput(hadoopConf, fullyQualifiedInputTableId)
}
private val queryCache: LoadingCache[String, TableReference] =
CacheBuilder.newBuilder()
.expireAfterWrite(STAGING_DATASET_TABLE_EXPIRATION_MS, TimeUnit.MILLISECONDS)
.build[String, TableReference](new CacheLoader[String, TableReference] {
override def load(key: String): TableReference = {
val sqlQuery = key
logger.info(s"Executing query $sqlQuery")
val location = hadoopConf.get(STAGING_DATASET_LOCATION, STAGING_DATASET_LOCATION_DEFAULT)
val destinationTable = temporaryTable(location)
logger.info(s"Destination table: $destinationTable")
val use_legacy_sql = !hadoopConf.get(USE_STANDARD_SQL_DIALECT,"true").toBoolean
val job = createQueryJob(sqlQuery, destinationTable, dryRun = false,use_legacy_sql)
waitForJob(job)
destinationTable
}
})
private def waitForJob(job: Job): Unit = {
BigQueryUtils.waitForJobCompletion(bigquery, projectId, job.getJobReference, new Progressable {
override def progress(): Unit = {}
})
}
private def stagingDataset(location: String): DatasetReference = {
// Create staging dataset if it does not already exist
val prefix = hadoopConf.get(STAGING_DATASET_PREFIX, STAGING_DATASET_PREFIX_DEFAULT)
val datasetId = prefix + location.toLowerCase
try {
bigquery.datasets().get(projectId, datasetId).execute()
logger.info(s"Staging dataset $projectId:$datasetId already exists")
} catch {
case e: GoogleJsonResponseException if e.getStatusCode == 404 =>
logger.info(s"Creating staging dataset $projectId:$datasetId")
val dsRef = new DatasetReference().setProjectId(projectId).setDatasetId(datasetId)
val ds = new BQDataset()
.setDatasetReference(dsRef)
.setDefaultTableExpirationMs(STAGING_DATASET_TABLE_EXPIRATION_MS)
.setDescription(STAGING_DATASET_DESCRIPTION)
.setLocation(location)
bigquery
.datasets()
.insert(projectId, ds)
.execute()
case NonFatal(e) => throw e
}
new DatasetReference().setProjectId(projectId).setDatasetId(datasetId)
}
private def temporaryTable(location: String): TableReference = {
val now = Instant.now().toString(BigQueryClient.TIME_FORMATTER)
val tableId = TABLE_ID_PREFIX + "_" + now + "_" + Random.nextInt(Int.MaxValue)
new TableReference()
.setProjectId(projectId)
.setDatasetId(stagingDataset(location).getDatasetId)
.setTableId(tableId)
}
private def createQueryJob(sqlQuery: String,
destinationTable: TableReference,
dryRun: Boolean,use_legacy_sql: Boolean = false): Job = {
var queryConfig = new JobConfigurationQuery()
.setQuery(sqlQuery)
.setPriority(PRIORITY)
.setCreateDisposition("CREATE_IF_NEEDED")
.setWriteDisposition("WRITE_EMPTY")
logger.info(s"Using legacy Sql: $use_legacy_sql")
queryConfig.setUseLegacySql(use_legacy_sql)
if (destinationTable != null) {
queryConfig = queryConfig
.setDestinationTable(destinationTable)
.setAllowLargeResults(true)
}
val jobConfig = new JobConfiguration().setQuery(queryConfig).setDryRun(dryRun)
val jobReference = createJobReference(projectId, JOB_ID_PREFIX)
val job = new Job().setConfiguration(jobConfig).setJobReference(jobReference)
bigquery.jobs().insert(projectId, job).execute()
}
private def createJobReference(projectId: String, jobIdPrefix: String): JobReference = {
val fullJobId = projectId + "-" + UUID.randomUUID().toString
new JobReference().setProjectId(projectId).setJobId(fullJobId)
}
def getLatestModifiedTime(tableReference: TableReference): Option[BigInteger] = {
try {
val table = bigquery.tables().get(tableReference.getProjectId, tableReference.getDatasetId, tableReference.getTableId).execute()
Some(table.getLastModifiedTime())
} catch {
case e: Exception => None
}
}
def getTableSchema(tableReference: TableReference): TableSchema = {
val table = bigquery.tables().get(tableReference.getProjectId,tableReference.getDatasetId,tableReference.getTableId).execute()
table.getSchema()
}
}
