156 lines
3.2 KiB
Go
156 lines
3.2 KiB
Go
package session
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import (
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"context"
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"github.com/nspcc-dev/neofs-api-go/v2/client"
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session "github.com/nspcc-dev/neofs-api-go/v2/session/grpc"
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"github.com/pkg/errors"
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"google.golang.org/grpc"
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)
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// Client represents universal session
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// transport client.
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type Client struct {
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client *createClient
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}
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// Option represents Client option.
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type Option func(*cfg)
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type cfg struct {
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proto client.Protocol
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globalOpts []client.Option
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gRPC cfgGRPC
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}
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type cfgGRPC struct {
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serviceClient session.SessionServiceClient
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grpcCallOpts []grpc.CallOption
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callOpts []session.Option
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client *session.Client
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}
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type createClient struct {
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requestConverter func(*CreateRequest) interface{}
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caller func(context.Context, interface{}) (interface{}, error)
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responseConverter func(interface{}) *CreateResponse
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}
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// Create sends CreateRequest over the network and returns CreateResponse.
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//
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// It returns any error encountered during the call.
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func (c *Client) Create(ctx context.Context, req *CreateRequest) (*CreateResponse, error) {
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resp, err := c.client.caller(ctx, c.client.requestConverter(req))
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if err != nil {
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return nil, errors.Wrap(err, "could not send session init request")
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}
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return c.client.responseConverter(resp), nil
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}
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func defaultCfg() *cfg {
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return &cfg{
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proto: client.ProtoGRPC,
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}
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}
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func New(opts ...Option) (*Client, error) {
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cfg := defaultCfg()
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for i := range opts {
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opts[i](cfg)
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}
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var err error
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switch cfg.proto {
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case client.ProtoGRPC:
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var c *session.Client
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if c, err = newGRPCClient(cfg); err != nil {
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break
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}
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return &Client{
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client: &createClient{
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requestConverter: func(req *CreateRequest) interface{} {
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return CreateRequestToGRPCMessage(req)
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},
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caller: func(ctx context.Context, req interface{}) (interface{}, error) {
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return c.Create(ctx, req.(*session.CreateRequest))
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},
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responseConverter: func(resp interface{}) *CreateResponse {
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return CreateResponseFromGRPCMessage(resp.(*session.CreateResponse))
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},
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},
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}, nil
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default:
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err = client.ErrProtoUnsupported
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}
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return nil, errors.Wrapf(err, "could not create %s Session client", cfg.proto)
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}
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func newGRPCClient(cfg *cfg) (*session.Client, error) {
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var err error
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if cfg.gRPC.client == nil {
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if cfg.gRPC.serviceClient == nil {
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conn, err := client.NewGRPCClientConn(cfg.globalOpts...)
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if err != nil {
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return nil, errors.Wrap(err, "could not open gRPC client connection")
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}
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cfg.gRPC.serviceClient = session.NewSessionServiceClient(conn)
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}
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cfg.gRPC.client, err = session.NewClient(
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cfg.gRPC.serviceClient,
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append(
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cfg.gRPC.callOpts,
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session.WithCallOptions(cfg.gRPC.grpcCallOpts),
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)...,
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)
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}
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return cfg.gRPC.client, err
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}
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func WithGlobalOpts(v ...client.Option) Option {
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return func(c *cfg) {
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if len(v) > 0 {
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c.globalOpts = v
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}
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}
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}
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func WithGRPCServiceClient(v session.SessionServiceClient) Option {
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return func(c *cfg) {
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c.gRPC.serviceClient = v
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}
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}
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func WithGRPCCallOpts(v []grpc.CallOption) Option {
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return func(c *cfg) {
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c.gRPC.grpcCallOpts = v
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}
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}
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func WithGRPCClientOpts(v []session.Option) Option {
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return func(c *cfg) {
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c.gRPC.callOpts = v
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}
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}
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func WithGRPCClient(v *session.Client) Option {
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return func(c *cfg) {
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c.gRPC.client = v
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}
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}
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