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package xyz.driver.core.file
import akka.NotUsed
import akka.stream.scaladsl.{Source, StreamConverters}
import akka.util.ByteString
import java.io.File
import java.nio.file.{Path, Paths}
import java.util.UUID.randomUUID
import com.amazonaws.services.s3.AmazonS3
import com.amazonaws.services.s3.model.{Bucket, GetObjectRequest, ListObjectsV2Request}
import xyz.driver.core.{Name, Revision}
import xyz.driver.core.time.Time
import scala.concurrent.{ExecutionContext, Future}
import scalaz.{ListT, OptionT}
@deprecated(
"Blob storage functionality has been reimplemented in xyz.driver.core.storage.BlobStorage. " +
"It has not been ported to S3 storage. Please raise an issue if this required for your use-case.",
"driver-core 1.8.14"
)
class S3Storage(s3: AmazonS3, bucket: Name[Bucket], executionContext: ExecutionContext, chunkSize: Int = 4096)
extends FileStorage {
implicit private val execution = executionContext
override def upload(localSource: File, destination: Path): Future[Unit] = Future {
checkSafeFileName(destination) {
val _ = s3.putObject(bucket.value, destination.toString, localSource).getETag
}
}
override def download(filePath: Path): OptionT[Future, File] =
OptionT.optionT(Future {
val tempDir = System.getProperty("java.io.tmpdir")
val randomFolderName = randomUUID().toString
val tempDestinationFile = new File(Paths.get(tempDir, randomFolderName, filePath.toString).toString)
if (!tempDestinationFile.getParentFile.mkdirs()) {
throw new Exception(s"Failed to create temp directory to download file `$tempDestinationFile`")
} else {
Option(s3.getObject(new GetObjectRequest(bucket.value, filePath.toString), tempDestinationFile)).map { _ =>
tempDestinationFile
}
}
})
override def stream(filePath: Path): OptionT[Future, Source[ByteString, NotUsed]] =
OptionT.optionT(Future {
Option(s3.getObject(new GetObjectRequest(bucket.value, filePath.toString))).map { elem =>
StreamConverters.fromInputStream(() => elem.getObjectContent(), chunkSize).mapMaterializedValue(_ => NotUsed)
}
})
override def delete(filePath: Path): Future[Unit] = Future {
s3.deleteObject(bucket.value, filePath.toString)
}
override def list(path: Path): ListT[Future, FileLink] =
ListT.listT(Future {
import scala.collection.JavaConverters._
val req = new ListObjectsV2Request().withBucketName(bucket.value).withPrefix(path.toString).withMaxKeys(2)
def isInSubFolder(path: Path)(fileLink: FileLink) =
fileLink.location.toString.replace(path.toString + "/", "").contains("/")
Iterator.continually(s3.listObjectsV2(req)).takeWhile { result =>
req.setContinuationToken(result.getNextContinuationToken)
result.isTruncated
} flatMap { result =>
result.getObjectSummaries.asScala.toList.map { summary =>
FileLink(
Name[File](summary.getKey),
Paths.get(path.toString + "/" + summary.getKey),
Revision[File](summary.getETag),
Time(summary.getLastModified.getTime),
summary.getSize
)
} filterNot isInSubFolder(path)
} toList
})
override def exists(path: Path): Future[Boolean] = Future {
s3.doesObjectExist(bucket.value, path.toString)
}
}
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