storj/pkg/pointerdb/pdbclient/client.go
2019-02-06 15:19:14 +02:00

184 lines
5.3 KiB
Go

// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package pdbclient
import (
"context"
"sync/atomic"
"unsafe"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
monkit "gopkg.in/spacemonkeygo/monkit.v2"
"storj.io/storj/pkg/auth/grpcauth"
"storj.io/storj/pkg/identity"
"storj.io/storj/pkg/pb"
"storj.io/storj/pkg/storj"
"storj.io/storj/pkg/transport"
"storj.io/storj/storage"
)
var (
mon = monkit.Package()
)
// PointerDB creates a grpcClient
type PointerDB struct {
client pb.PointerDBClient
authorization unsafe.Pointer // *pb.SignedMessage
}
// New Used as a public function
func New(gcclient pb.PointerDBClient) (pdbc *PointerDB) {
return &PointerDB{client: gcclient}
}
// a compiler trick to make sure *Overlay implements Client
var _ Client = (*PointerDB)(nil)
// ListItem is a single item in a listing
type ListItem struct {
Path storj.Path
Pointer *pb.Pointer
IsPrefix bool
}
// Client services offerred for the interface
type Client interface {
Put(ctx context.Context, path storj.Path, pointer *pb.Pointer) error
Get(ctx context.Context, path storj.Path) (*pb.Pointer, []*pb.Node, *pb.PayerBandwidthAllocation, error)
List(ctx context.Context, prefix, startAfter, endBefore storj.Path, recursive bool, limit int, metaFlags uint32) (items []ListItem, more bool, err error)
Delete(ctx context.Context, path storj.Path) error
SignedMessage() *pb.SignedMessage
PayerBandwidthAllocation(context.Context, pb.BandwidthAction) (*pb.PayerBandwidthAllocation, error)
// Disconnect() error // TODO: implement
}
// NewClient initializes a new pointerdb client
func NewClient(identity *identity.FullIdentity, address string, APIKey string) (*PointerDB, error) {
return NewClientContext(context.TODO(), identity, address, APIKey)
}
// NewClientContext initializes a new pointerdb client
func NewClientContext(ctx context.Context, identity *identity.FullIdentity, address string, APIKey string) (*PointerDB, error) {
apiKeyInjector := grpcauth.NewAPIKeyInjector(APIKey)
tc := transport.NewClient(identity)
conn, err := tc.DialAddress(
ctx,
address,
grpc.WithUnaryInterceptor(apiKeyInjector),
)
if err != nil {
return nil, err
}
return &PointerDB{client: pb.NewPointerDBClient(conn)}, nil
}
// a compiler trick to make sure *PointerDB implements Client
var _ Client = (*PointerDB)(nil)
// Put is the interface to make a PUT request, needs Pointer and APIKey
func (pdb *PointerDB) Put(ctx context.Context, path storj.Path, pointer *pb.Pointer) (err error) {
defer mon.Task()(&ctx)(&err)
_, err = pdb.client.Put(ctx, &pb.PutRequest{Path: path, Pointer: pointer})
return err
}
// Get is the interface to make a GET request, needs PATH and APIKey
func (pdb *PointerDB) Get(ctx context.Context, path storj.Path) (pointer *pb.Pointer, nodes []*pb.Node, pba *pb.PayerBandwidthAllocation, err error) {
defer mon.Task()(&ctx)(&err)
res, err := pdb.client.Get(ctx, &pb.GetRequest{Path: path})
if err != nil {
if status.Code(err) == codes.NotFound {
return nil, nil, nil, storage.ErrKeyNotFound.Wrap(err)
}
return nil, nil, nil, Error.Wrap(err)
}
atomic.StorePointer(&pdb.authorization, unsafe.Pointer(res.GetAuthorization()))
if res.GetPointer().GetType() == pb.Pointer_INLINE {
return res.GetPointer(), nodes, res.GetPba(), nil
}
pieces := res.GetPointer().GetRemote().GetRemotePieces()
nodes = make([]*pb.Node, len(pieces))
// fill missing nodes with nil values to match the size and order of remote pieces
j := 0
for i := 0; i < len(pieces); i++ {
if j == len(res.GetNodes()) {
break
}
if pieces[i].NodeId == res.GetNodes()[j].Id {
nodes[i] = res.GetNodes()[j]
j++
}
}
return res.GetPointer(), nodes, res.GetPba(), nil
}
// List is the interface to make a LIST request, needs StartingPathKey, Limit, and APIKey
func (pdb *PointerDB) List(ctx context.Context, prefix, startAfter, endBefore storj.Path, recursive bool, limit int, metaFlags uint32) (items []ListItem, more bool, err error) {
defer mon.Task()(&ctx)(&err)
res, err := pdb.client.List(ctx, &pb.ListRequest{
Prefix: prefix,
StartAfter: startAfter,
EndBefore: endBefore,
Recursive: recursive,
Limit: int32(limit),
MetaFlags: metaFlags,
})
if err != nil {
return nil, false, err
}
list := res.GetItems()
items = make([]ListItem, len(list))
for i, itm := range list {
items[i] = ListItem{
Path: itm.GetPath(),
Pointer: itm.GetPointer(),
IsPrefix: itm.IsPrefix,
}
}
return items, res.GetMore(), nil
}
// Delete is the interface to make a Delete request, needs Path and APIKey
func (pdb *PointerDB) Delete(ctx context.Context, path storj.Path) (err error) {
defer mon.Task()(&ctx)(&err)
_, err = pdb.client.Delete(ctx, &pb.DeleteRequest{Path: path})
return err
}
// PayerBandwidthAllocation gets payer bandwidth allocation message
func (pdb *PointerDB) PayerBandwidthAllocation(ctx context.Context, action pb.BandwidthAction) (resp *pb.PayerBandwidthAllocation, err error) {
defer mon.Task()(&ctx)(&err)
response, err := pdb.client.PayerBandwidthAllocation(ctx, &pb.PayerBandwidthAllocationRequest{Action: action})
if err != nil {
return nil, err
}
return response.GetPba(), nil
}
// SignedMessage gets signed message from last request
func (pdb *PointerDB) SignedMessage() *pb.SignedMessage {
return (*pb.SignedMessage)(atomic.LoadPointer(&pdb.authorization))
}