frostfs-api-go/v2/session/grpc/client.go
Evgenii Stratonikov 9ddfcdfbba [#277] go.mod: remove pkg/errors
Use stdlib `errors` instead.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2021-05-19 11:14:56 +03:00

62 lines
1.2 KiB
Go

package session
import (
"context"
"errors"
"google.golang.org/grpc"
)
// Client wraps SessionServiceClient
// with pre-defined configurations.
type Client struct {
*cfg
client SessionServiceClient
}
// Option represents Client option.
type Option func(*cfg)
type cfg struct {
callOpts []grpc.CallOption
}
// ErrNilSessionServiceClient is returned by functions that expect
// a non-nil SessionServiceClient, but received nil.
var ErrNilSessionServiceClient = errors.New("session 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 SessionServiceClient, opts ...Option) (*Client, error) {
if c == nil {
return nil, ErrNilSessionServiceClient
}
cfg := defaultCfg()
for i := range opts {
opts[i](cfg)
}
return &Client{
cfg: cfg,
client: c,
}, nil
}
func (c *Client) Create(ctx context.Context, req *CreateRequest) (*CreateResponse, error) {
return c.client.Create(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
}
}