recommit transfer manager v2 files

feature/s3/transfermanager/api.go

@@ -0,0 +1,16 @@
+package transfermanager
+
+import (
+	"context"
+
+	"github.com/aws/aws-sdk-go-v2/service/s3"
+)
+
+// S3APIClient defines an interface doing S3 client side operations for transfer manager
+type S3APIClient interface {
+	PutObject(context.Context, *s3.PutObjectInput, ...func(*s3.Options)) (*s3.PutObjectOutput, error)
+	UploadPart(context.Context, *s3.UploadPartInput, ...func(*s3.Options)) (*s3.UploadPartOutput, error)
+	CreateMultipartUpload(context.Context, *s3.CreateMultipartUploadInput, ...func(*s3.Options)) (*s3.CreateMultipartUploadOutput, error)
+	CompleteMultipartUpload(context.Context, *s3.CompleteMultipartUploadInput, ...func(*s3.Options)) (*s3.CompleteMultipartUploadOutput, error)
+	AbortMultipartUpload(context.Context, *s3.AbortMultipartUploadInput, ...func(*s3.Options)) (*s3.AbortMultipartUploadOutput, error)
+}

feature/s3/transfermanager/api_client.go

@@ -0,0 +1,51 @@
+package transfermanager
+
+import (
+	"github.com/aws/aws-sdk-go-v2/aws"
+)
+
+const userAgentKey = "s3-transfer"
+
+// defaultMaxUploadParts is the maximum allowed number of parts in a multi-part upload
+// on Amazon S3.
+const defaultMaxUploadParts = 10000
+
+// defaultPartSizeBytes is the default part size when transferring objects to/from S3
+const minPartSizeBytes = 1024 * 1024 * 8
+
+// defaultMultipartUploadThreshold is the default size threshold in bytes indicating when to use multipart upload.
+const defaultMultipartUploadThreshold = 1024 * 1024 * 16
+
+// defaultTransferConcurrency is the default number of goroutines to spin up when
+// using PutObject().
+const defaultTransferConcurrency = 5
+
+// Client provides the API client to make operations call for Amazon Simple
+// Storage Service's Transfer Manager
+// It is safe to call Client methods concurrently across goroutines.
+type Client struct {
+	options Options
+}
+
+// New returns an initialized Client from the client Options. Provide
+// more functional options to further configure the Client
+func New(s3Client S3APIClient, opts Options, optFns ...func(*Options)) *Client {
+	opts.S3 = s3Client
+	for _, fn := range optFns {
+		fn(&opts)
+	}
+
+	resolveConcurrency(&opts)
+	resolvePartSizeBytes(&opts)
+	resolveChecksumAlgorithm(&opts)
+	resolveMultipartUploadThreshold(&opts)
+
+	return &Client{
+		options: opts,
+	}
+}
+
+// NewFromConfig returns a new Client from the provided s3 config
+func NewFromConfig(s3Client S3APIClient, cfg aws.Config, optFns ...func(*Options)) *Client {
+	return New(s3Client, Options{}, optFns...)
+}