Merge SNARK-MR-6: SNRK-48: Implement-s3-driver

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Kirill Grachev 2023-05-01 18:37:38 +00:00 committed by Space Cloud
commit 7599fd5ffd
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package space.kscience.snark.storage.s3
import aws.sdk.kotlin.services.s3.S3Client
import space.kscience.snark.storage.Directory
import space.kscience.snark.storage.FileReader
import space.kscience.snark.storage.FileWriter
import java.nio.file.Path
import kotlin.io.path.*
internal class S3Directory(
private val client: S3Client,
private val bucketName: String,
private val currentDir: Path,
) : Directory {
override suspend fun get(filename: String): FileReader =
S3FileReader(client, bucketName, currentDir / filename)
override suspend fun create(filename: String, ignoreIfExists: Boolean) {
if (!ignoreIfExists) {
TODO("could not check if file exists")
}
}
override suspend fun put(filename: String): FileWriter =
S3FileWriter(client, bucketName, currentDir / filename)
override suspend fun getSubdir(path: Path): S3Directory =
S3Directory(client, bucketName, currentDir / path)
override suspend fun createSubdir(dirname: String, ignoreIfExists: Boolean): S3Directory =
if (!ignoreIfExists) {
TODO("could not check if directory exists")
} else {
S3Directory(client, bucketName, currentDir / dirname)
}
override fun close() {
}
}

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package space.kscience.snark.storage.s3
import aws.sdk.kotlin.services.s3.S3Client
import aws.sdk.kotlin.services.s3.model.GetObjectRequest
import aws.sdk.kotlin.services.s3.putObject
import aws.smithy.kotlin.runtime.content.ByteStream
import aws.smithy.kotlin.runtime.content.toByteArray
import space.kscience.snark.storage.FileReader
import space.kscience.snark.storage.FileWriter
import java.nio.file.Path
import kotlin.io.path.*
internal class S3FileReader(private val client: S3Client, private val bucketName: String, private val path: Path) : FileReader {
override suspend fun readAll(): ByteArray {
val result = client.getObject(GetObjectRequest{
bucket = bucketName
key = path.toString()
}) {
it.body?.toByteArray() ?: ByteArray(0)
}
return result
}
override fun close() {
}
}
internal class S3FileWriter(private val client: S3Client, private val bucketName: String, private val path: Path) : FileWriter {
override suspend fun write(bytes: ByteArray) {
client.putObject {
bucket = bucketName
key = path.toString()
body = ByteStream.fromBytes(bytes)
}
}
override fun close() {
}
}

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package space.kscience.snark.storage.s3
import aws.sdk.kotlin.services.s3.*
import space.kscience.snark.storage.Directory
import space.kscience.snark.storage.FileReader
import space.kscience.snark.storage.FileWriter
import java.lang.Exception
import java.nio.file.Path
import kotlin.io.path.*
public fun s3Storage(client: S3Client): Directory =
S3Root(client)
public fun s3Bucket(client: S3Client, bucket: String): Directory =
S3Directory(client, bucket, Path(""))
internal fun splitPathIntoBucketAndPath(path: Path): Pair<String, Path> {
val bucket = path.getName(0)
val filePath = path.relativize(bucket)
return Pair(bucket.toString(), filePath)
}
internal class S3Root(private val client: S3Client) : Directory {
override suspend fun get(filename: String): FileReader {
throw NoSuchFileException(Path(filename).toFile())
}
override suspend fun create(filename: String, ignoreIfExists: Boolean) {
throw NoSuchFileException(Path(filename).toFile())
}
override suspend fun put(filename: String): FileWriter {
throw NoSuchFileException(Path(filename).toFile())
}
override suspend fun getSubdir(path: Path): Directory = try {
val (bucketName, filePath) = splitPathIntoBucketAndPath(path)
client.headBucket {
bucket = bucketName
}
S3Directory(client, bucketName, filePath)
} catch (ex: Exception) {
throw AccessDeniedException(path.toFile(), reason = ex.message)
}
override suspend fun createSubdir(dirname: String, ignoreIfExists: Boolean): Directory = try {
val (bucketName, filePath) = splitPathIntoBucketAndPath(Path(dirname))
client.createBucket {
bucket = bucketName
}
S3Directory(client, bucketName, filePath)
} catch (ex: Exception) {
throw AccessDeniedException(Path(dirname).toFile(), reason = ex.message)
}
override fun close() {
}
}