104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package piecestore
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import (
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"context"
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"io"
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"github.com/zeebo/errs"
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"go.uber.org/zap"
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"google.golang.org/grpc"
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"storj.io/storj/internal/memory"
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"storj.io/storj/pkg/auth/signing"
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"storj.io/storj/pkg/pb"
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"storj.io/storj/pkg/transport"
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)
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// Error is the default error class for piecestore client.
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var Error = errs.Class("piecestore")
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// Config defines piecestore client parameters fro upload and download.
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type Config struct {
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UploadBufferSize int64
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DownloadBufferSize int64
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InitialStep int64
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MaximumStep int64
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}
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// DefaultConfig are the default params used for upload and download.
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var DefaultConfig = Config{
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UploadBufferSize: 256 * memory.KiB.Int64(),
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DownloadBufferSize: 256 * memory.KiB.Int64(),
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InitialStep: 64 * memory.KiB.Int64(),
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MaximumStep: 1 * memory.MiB.Int64(),
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}
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// Client implements uploading, downloading and deleting content from a piecestore.
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type Client struct {
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log *zap.Logger
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signer signing.Signer
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client pb.PiecestoreClient
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conn *grpc.ClientConn
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config Config
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}
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// Dial dials the target piecestore endpoint.
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func Dial(ctx context.Context, transport transport.Client, target *pb.Node, log *zap.Logger, signer signing.Signer, config Config) (*Client, error) {
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conn, err := transport.DialNode(ctx, target)
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if err != nil {
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return nil, Error.Wrap(err)
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}
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return &Client{
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log: log,
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signer: signer,
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client: pb.NewPiecestoreClient(conn),
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conn: conn,
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config: config,
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}, nil
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}
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// Delete uses delete order limit to delete a piece on piece store.
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func (client *Client) Delete(ctx context.Context, limit *pb.OrderLimit) (err error) {
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defer mon.Task()(&ctx)(&err)
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_, err = client.client.Delete(ctx, &pb.PieceDeleteRequest{
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Limit: limit,
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})
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return Error.Wrap(err)
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}
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// Retain uses a bloom filter to tell the piece store which pieces to keep.
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func (client *Client) Retain(ctx context.Context, req *pb.RetainRequest) (err error) {
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defer mon.Task()(&ctx)(&err)
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_, err = client.client.Retain(ctx, req)
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return Error.Wrap(err)
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}
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// Close closes the underlying connection.
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func (client *Client) Close() error {
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return client.conn.Close()
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}
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// next allocation step find the next trusted step.
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func (client *Client) nextAllocationStep(previous int64) int64 {
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// TODO: ensure that this is frame idependent
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next := previous * 3 / 2
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if next > client.config.MaximumStep {
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next = client.config.MaximumStep
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}
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return next
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}
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// ignoreEOF is an utility func for ignoring EOF error, when it's not important.
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func ignoreEOF(err error) error {
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if err == io.EOF {
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return nil
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}
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return err
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}
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