SNRK-48: Add s3 implementation
Use common s3 api and '/'-separated keys to simulate directories
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package space.kscience.snark.storage.s3
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import aws.sdk.kotlin.services.s3.S3Client
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import space.kscience.snark.storage.Directory as Dir
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import space.kscience.snark.storage.FileReader
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import space.kscience.snark.storage.FileWriter
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import java.nio.file.Path
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public class Directory(
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private val client: S3Client,
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private val bucketName: String,
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private val currentDir: String,
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) : Dir {
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override suspend fun get(filename: String): FileReader = run {
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S3FileReader(client, bucketName, "$currentDir/$filename")
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}
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override suspend fun create(filename: String, ignoreIfExists: Boolean) {
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if (!ignoreIfExists) {
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throw IllegalArgumentException("could not check if file exists")
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}
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}
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override suspend fun put(filename: String): FileWriter = run {
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S3FileWriter(client, bucketName, "$currentDir/$filename")
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}
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override suspend fun getSubdir(path: Path): Directory = run {
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Directory(client, bucketName, "$currentDir/$path")
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}
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override suspend fun createSubdir(dirname: String, ignoreIfExists: Boolean): Directory = run {
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if (!ignoreIfExists) {
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throw IllegalArgumentException("could not check if directory exists")
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}
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Directory(client, bucketName, "$currentDir/$dirname")
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}
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override fun close() {
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}
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}
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package space.kscience.snark.storage.s3
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import aws.sdk.kotlin.services.s3.S3Client
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import aws.sdk.kotlin.services.s3.model.GetObjectRequest
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import aws.sdk.kotlin.services.s3.putObject
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import aws.smithy.kotlin.runtime.content.ByteStream
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import aws.smithy.kotlin.runtime.content.toByteArray
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import space.kscience.snark.storage.FileReader
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import space.kscience.snark.storage.FileWriter
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public class S3FileReader(private val client: S3Client, private val bucketName: String, private val fullQualifiedPath: String) : FileReader {
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override suspend fun readAll(): ByteArray {
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val result = client.getObject(GetObjectRequest{
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bucket = bucketName
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key = fullQualifiedPath
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}) {
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it.body?.toByteArray() ?: ByteArray(0)
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}
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return result
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}
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override fun close() {
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}
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}
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public class S3FileWriter(private val client: S3Client, private val bucketName: String, private val fullQualifiedPath: String) : FileWriter {
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override suspend fun write(bytes: ByteArray) {
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client.putObject {
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bucket = bucketName
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key = fullQualifiedPath
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body = ByteStream.fromBytes(bytes)
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}
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}
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override fun close() {
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}
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}
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@ -0,0 +1,46 @@
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package space.kscience.snark.storage.s3
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import aws.sdk.kotlin.services.s3.*
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import space.kscience.snark.storage.Directory as Dir
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import space.kscience.snark.storage.FileReader
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import space.kscience.snark.storage.FileWriter
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import java.io.File
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import java.lang.Exception
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import java.nio.file.Path
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public class Root(private val client: S3Client) : Dir {
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override suspend fun get(filename: String): FileReader {
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throw NoSuchFileException(File(filename))
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}
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override suspend fun create(filename: String, ignoreIfExists: Boolean) {
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throw IllegalCallerException()
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}
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override suspend fun put(filename: String): FileWriter {
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throw NoSuchFileException(File(filename))
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}
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override suspend fun getSubdir(path: Path): Directory = try {
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val bucketName = path.toString()
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client.headBucket {
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bucket = bucketName
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}
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Directory(client, bucketName, "")
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} catch (ex: Exception) {
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throw java.nio.file.AccessDeniedException(path.toString()).initCause(ex)
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}
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override suspend fun createSubdir(dirname: String, ignoreIfExists: Boolean): Directory = try {
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client.createBucket {
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bucket = dirname
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}
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Directory(client, dirname, "")
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} catch (ex: Exception) {
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throw java.nio.file.AccessDeniedException(dirname).initCause(ex)
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}
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override fun close() {
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}
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}
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