storj/pkg/pointerdb/pdbclient/client.go
Michal Niewrzal deb015970d
Use Nodes array from pdb.Get (#578)
* Use Nodes array from pdb.Get

* fix problems with captplanet tests

* better comments
2018-11-06 18:03:11 +01:00

163 lines
4.5 KiB
Go

// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package pdbclient
import (
"context"
"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/pb"
"storj.io/storj/pkg/provider"
"storj.io/storj/pkg/storj"
"storj.io/storj/storage"
)
var (
mon = monkit.Package()
)
// PointerDB creates a grpcClient
type PointerDB struct {
grpcClient pb.PointerDBClient
pba *pb.PayerBandwidthAllocation
authorization *pb.SignedMessage
}
// New Used as a public function
func New(gcclient pb.PointerDBClient) (pdbc *PointerDB) {
return &PointerDB{grpcClient: 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, 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() *pb.PayerBandwidthAllocation
// Disconnect() error // TODO: implement
}
// NewClient initializes a new pointerdb client
func NewClient(identity *provider.FullIdentity, address string, APIKey string) (*PointerDB, error) {
dialOpt, err := identity.DialOption()
if err != nil {
return nil, err
}
apiKeyInjector := grpcauth.NewAPIKeyInjector(APIKey)
c, err := clientConnection(address, dialOpt, grpc.WithUnaryInterceptor(apiKeyInjector))
if err != nil {
return nil, err
}
return &PointerDB{grpcClient: c}, nil
}
// a compiler trick to make sure *PointerDB implements Client
var _ Client = (*PointerDB)(nil)
// ClientConnection makes a server connection
func clientConnection(serverAddr string, opts ...grpc.DialOption) (pb.PointerDBClient, error) {
conn, err := grpc.Dial(serverAddr, opts...)
if err != nil {
return nil, err
}
return pb.NewPointerDBClient(conn), 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.grpcClient.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, err error) {
defer mon.Task()(&ctx)(&err)
res, err := pdb.grpcClient.Get(ctx, &pb.GetRequest{Path: path})
if err != nil {
if status.Code(err) == codes.NotFound {
return nil, nil, storage.ErrKeyNotFound.Wrap(err)
}
return nil, nil, Error.Wrap(err)
}
pdb.pba = res.GetPba()
pdb.authorization = res.GetAuthorization()
return res.GetPointer(), res.GetNodes(), 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.grpcClient.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.grpcClient.Delete(ctx, &pb.DeleteRequest{Path: path})
return err
}
// SignedMessage gets signed message from last request
func (pdb *PointerDB) SignedMessage() *pb.SignedMessage {
return pdb.authorization
}
// PayerBandwidthAllocation gets payer bandwidth allocation message from last get request
func (pdb *PointerDB) PayerBandwidthAllocation() *pb.PayerBandwidthAllocation {
return pdb.pba
}