| // Copyright 2020 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // Code generated by protoc-gen-go_gapic. DO NOT EDIT. |
| |
| package pubsublite |
| |
| import ( |
| "context" |
| "fmt" |
| "math" |
| "net/url" |
| "time" |
| |
| "github.com/golang/protobuf/proto" |
| gax "github.com/googleapis/gax-go/v2" |
| "google.golang.org/api/iterator" |
| "google.golang.org/api/option" |
| "google.golang.org/api/option/internaloption" |
| gtransport "google.golang.org/api/transport/grpc" |
| pubsublitepb "google.golang.org/genproto/googleapis/cloud/pubsublite/v1" |
| "google.golang.org/grpc" |
| "google.golang.org/grpc/codes" |
| "google.golang.org/grpc/metadata" |
| ) |
| |
| var newCursorClientHook clientHook |
| |
| // CursorCallOptions contains the retry settings for each method of CursorClient. |
| type CursorCallOptions struct { |
| StreamingCommitCursor []gax.CallOption |
| CommitCursor []gax.CallOption |
| ListPartitionCursors []gax.CallOption |
| } |
| |
| func defaultCursorClientOptions() []option.ClientOption { |
| return []option.ClientOption{ |
| internaloption.WithDefaultEndpoint("pubsublite.googleapis.com:443"), |
| internaloption.WithDefaultMTLSEndpoint("pubsublite.mtls.googleapis.com:443"), |
| option.WithGRPCDialOption(grpc.WithDisableServiceConfig()), |
| option.WithScopes(DefaultAuthScopes()...), |
| option.WithGRPCDialOption(grpc.WithDefaultCallOptions( |
| grpc.MaxCallRecvMsgSize(math.MaxInt32))), |
| } |
| } |
| |
| func defaultCursorCallOptions() *CursorCallOptions { |
| return &CursorCallOptions{ |
| StreamingCommitCursor: []gax.CallOption{}, |
| CommitCursor: []gax.CallOption{ |
| gax.WithRetry(func() gax.Retryer { |
| return gax.OnCodes([]codes.Code{ |
| codes.DeadlineExceeded, |
| codes.Unavailable, |
| codes.Aborted, |
| codes.Internal, |
| codes.Unknown, |
| }, gax.Backoff{ |
| Initial: 100 * time.Millisecond, |
| Max: 60000 * time.Millisecond, |
| Multiplier: 1.30, |
| }) |
| }), |
| }, |
| ListPartitionCursors: []gax.CallOption{ |
| gax.WithRetry(func() gax.Retryer { |
| return gax.OnCodes([]codes.Code{ |
| codes.DeadlineExceeded, |
| codes.Unavailable, |
| codes.Aborted, |
| codes.Internal, |
| codes.Unknown, |
| }, gax.Backoff{ |
| Initial: 100 * time.Millisecond, |
| Max: 60000 * time.Millisecond, |
| Multiplier: 1.30, |
| }) |
| }), |
| }, |
| } |
| } |
| |
| // CursorClient is a client for interacting with . |
| // |
| // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls. |
| type CursorClient struct { |
| // Connection pool of gRPC connections to the service. |
| connPool gtransport.ConnPool |
| |
| // flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE |
| disableDeadlines bool |
| |
| // The gRPC API client. |
| cursorClient pubsublitepb.CursorServiceClient |
| |
| // The call options for this service. |
| CallOptions *CursorCallOptions |
| |
| // The x-goog-* metadata to be sent with each request. |
| xGoogMetadata metadata.MD |
| } |
| |
| // NewCursorClient creates a new cursor service client. |
| // |
| // The service that a subscriber client application uses to manage committed |
| // cursors while receiving messsages. A cursor represents a subscriber’s |
| // progress within a topic partition for a given subscription. |
| func NewCursorClient(ctx context.Context, opts ...option.ClientOption) (*CursorClient, error) { |
| clientOpts := defaultCursorClientOptions() |
| |
| if newCursorClientHook != nil { |
| hookOpts, err := newCursorClientHook(ctx, clientHookParams{}) |
| if err != nil { |
| return nil, err |
| } |
| clientOpts = append(clientOpts, hookOpts...) |
| } |
| |
| disableDeadlines, err := checkDisableDeadlines() |
| if err != nil { |
| return nil, err |
| } |
| |
| connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...) |
| if err != nil { |
| return nil, err |
| } |
| c := &CursorClient{ |
| connPool: connPool, |
| disableDeadlines: disableDeadlines, |
| CallOptions: defaultCursorCallOptions(), |
| |
| cursorClient: pubsublitepb.NewCursorServiceClient(connPool), |
| } |
| c.setGoogleClientInfo() |
| |
| return c, nil |
| } |
| |
| // Connection returns a connection to the API service. |
| // |
| // Deprecated. |
| func (c *CursorClient) Connection() *grpc.ClientConn { |
| return c.connPool.Conn() |
| } |
| |
| // Close closes the connection to the API service. The user should invoke this when |
| // the client is no longer required. |
| func (c *CursorClient) Close() error { |
| return c.connPool.Close() |
| } |
| |
| // setGoogleClientInfo sets the name and version of the application in |
| // the `x-goog-api-client` header passed on each request. Intended for |
| // use by Google-written clients. |
| func (c *CursorClient) setGoogleClientInfo(keyval ...string) { |
| kv := append([]string{"gl-go", versionGo()}, keyval...) |
| kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version) |
| c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...)) |
| } |
| |
| // StreamingCommitCursor establishes a stream with the server for managing committed cursors. |
| func (c *CursorClient) StreamingCommitCursor(ctx context.Context, opts ...gax.CallOption) (pubsublitepb.CursorService_StreamingCommitCursorClient, error) { |
| ctx = insertMetadata(ctx, c.xGoogMetadata) |
| opts = append(c.CallOptions.StreamingCommitCursor[0:len(c.CallOptions.StreamingCommitCursor):len(c.CallOptions.StreamingCommitCursor)], opts...) |
| var resp pubsublitepb.CursorService_StreamingCommitCursorClient |
| err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error { |
| var err error |
| resp, err = c.cursorClient.StreamingCommitCursor(ctx, settings.GRPC...) |
| return err |
| }, opts...) |
| if err != nil { |
| return nil, err |
| } |
| return resp, nil |
| } |
| |
| // CommitCursor updates the committed cursor. |
| func (c *CursorClient) CommitCursor(ctx context.Context, req *pubsublitepb.CommitCursorRequest, opts ...gax.CallOption) (*pubsublitepb.CommitCursorResponse, error) { |
| if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines { |
| cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond) |
| defer cancel() |
| ctx = cctx |
| } |
| ctx = insertMetadata(ctx, c.xGoogMetadata) |
| opts = append(c.CallOptions.CommitCursor[0:len(c.CallOptions.CommitCursor):len(c.CallOptions.CommitCursor)], opts...) |
| var resp *pubsublitepb.CommitCursorResponse |
| err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error { |
| var err error |
| resp, err = c.cursorClient.CommitCursor(ctx, req, settings.GRPC...) |
| return err |
| }, opts...) |
| if err != nil { |
| return nil, err |
| } |
| return resp, nil |
| } |
| |
| // ListPartitionCursors returns all committed cursor information for a subscription. |
| func (c *CursorClient) ListPartitionCursors(ctx context.Context, req *pubsublitepb.ListPartitionCursorsRequest, opts ...gax.CallOption) *PartitionCursorIterator { |
| md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent()))) |
| ctx = insertMetadata(ctx, c.xGoogMetadata, md) |
| opts = append(c.CallOptions.ListPartitionCursors[0:len(c.CallOptions.ListPartitionCursors):len(c.CallOptions.ListPartitionCursors)], opts...) |
| it := &PartitionCursorIterator{} |
| req = proto.Clone(req).(*pubsublitepb.ListPartitionCursorsRequest) |
| it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsublitepb.PartitionCursor, string, error) { |
| var resp *pubsublitepb.ListPartitionCursorsResponse |
| req.PageToken = pageToken |
| if pageSize > math.MaxInt32 { |
| req.PageSize = math.MaxInt32 |
| } else { |
| req.PageSize = int32(pageSize) |
| } |
| err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error { |
| var err error |
| resp, err = c.cursorClient.ListPartitionCursors(ctx, req, settings.GRPC...) |
| return err |
| }, opts...) |
| if err != nil { |
| return nil, "", err |
| } |
| |
| it.Response = resp |
| return resp.GetPartitionCursors(), resp.GetNextPageToken(), nil |
| } |
| fetch := func(pageSize int, pageToken string) (string, error) { |
| items, nextPageToken, err := it.InternalFetch(pageSize, pageToken) |
| if err != nil { |
| return "", err |
| } |
| it.items = append(it.items, items...) |
| return nextPageToken, nil |
| } |
| it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf) |
| it.pageInfo.MaxSize = int(req.GetPageSize()) |
| it.pageInfo.Token = req.GetPageToken() |
| return it |
| } |
| |
| // PartitionCursorIterator manages a stream of *pubsublitepb.PartitionCursor. |
| type PartitionCursorIterator struct { |
| items []*pubsublitepb.PartitionCursor |
| pageInfo *iterator.PageInfo |
| nextFunc func() error |
| |
| // Response is the raw response for the current page. |
| // It must be cast to the RPC response type. |
| // Calling Next() or InternalFetch() updates this value. |
| Response interface{} |
| |
| // InternalFetch is for use by the Google Cloud Libraries only. |
| // It is not part of the stable interface of this package. |
| // |
| // InternalFetch returns results from a single call to the underlying RPC. |
| // The number of results is no greater than pageSize. |
| // If there are no more results, nextPageToken is empty and err is nil. |
| InternalFetch func(pageSize int, pageToken string) (results []*pubsublitepb.PartitionCursor, nextPageToken string, err error) |
| } |
| |
| // PageInfo supports pagination. See the google.golang.org/api/iterator package for details. |
| func (it *PartitionCursorIterator) PageInfo() *iterator.PageInfo { |
| return it.pageInfo |
| } |
| |
| // Next returns the next result. Its second return value is iterator.Done if there are no more |
| // results. Once Next returns Done, all subsequent calls will return Done. |
| func (it *PartitionCursorIterator) Next() (*pubsublitepb.PartitionCursor, error) { |
| var item *pubsublitepb.PartitionCursor |
| if err := it.nextFunc(); err != nil { |
| return item, err |
| } |
| item = it.items[0] |
| it.items = it.items[1:] |
| return item, nil |
| } |
| |
| func (it *PartitionCursorIterator) bufLen() int { |
| return len(it.items) |
| } |
| |
| func (it *PartitionCursorIterator) takeBuf() interface{} { |
| b := it.items |
| it.items = nil |
| return b |
| } |