frostfs-api-go-pogpp/v2/accounting/grpc/client.go
Leonard Lyubich 28d8acc58a v2/accounting: Implement thin NeoFS gRPC client
Defines thin wrapper over the generated gRPC Accounting service client to
fix some of its options.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
2020-09-18 10:43:33 +03:00

62 lines
1.3 KiB
Go

package accounting
import (
"context"
"github.com/pkg/errors"
"google.golang.org/grpc"
)
// Client wraps AccountingServiceClient
// with pre-defined configurations.
type Client struct {
*cfg
client AccountingServiceClient
}
// Option represents Client option.
type Option func(*cfg)
type cfg struct {
callOpts []grpc.CallOption
}
// ErrNilAccountingServiceClient is returned by functions that expect
// a non-nil AccountingServiceClient, but received nil.
var ErrNilAccountingServiceClient = errors.New("accounting gRPC client is nil")
func defaultCfg() *cfg {
return new(cfg)
}
// NewClient creates, initializes and returns a new Client instance.
//
// Options are applied one by one in order.
func NewClient(c AccountingServiceClient, opts ...Option) (*Client, error) {
if c == nil {
return nil, ErrNilAccountingServiceClient
}
cfg := defaultCfg()
for i := range opts {
opts[i](cfg)
}
return &Client{
cfg: cfg,
client: c,
}, nil
}
func (c *Client) Balance(ctx context.Context, req *BalanceRequest) (*BalanceResponse, error) {
return c.client.Balance(ctx, req, c.callOpts...)
}
// WithCallOptions returns Option that configures
// Client to attach call options to each rpc call.
func WithCallOptions(opts []grpc.CallOption) Option {
return func(c *cfg) {
c.callOpts = opts
}
}