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- // Copyright 2018 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.
-
- // AUTO-GENERATED CODE. DO NOT EDIT.
-
- package pubsub
-
- import (
- "math"
- "time"
-
- "cloud.google.com/go/iam"
- "cloud.google.com/go/internal/version"
- gax "github.com/googleapis/gax-go"
- "golang.org/x/net/context"
- "google.golang.org/api/iterator"
- "google.golang.org/api/option"
- "google.golang.org/api/transport"
- pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
- "google.golang.org/grpc"
- "google.golang.org/grpc/codes"
- "google.golang.org/grpc/metadata"
- )
-
- // SubscriberCallOptions contains the retry settings for each method of SubscriberClient.
- type SubscriberCallOptions struct {
- CreateSubscription []gax.CallOption
- GetSubscription []gax.CallOption
- UpdateSubscription []gax.CallOption
- ListSubscriptions []gax.CallOption
- DeleteSubscription []gax.CallOption
- ModifyAckDeadline []gax.CallOption
- Acknowledge []gax.CallOption
- Pull []gax.CallOption
- StreamingPull []gax.CallOption
- ModifyPushConfig []gax.CallOption
- ListSnapshots []gax.CallOption
- CreateSnapshot []gax.CallOption
- UpdateSnapshot []gax.CallOption
- DeleteSnapshot []gax.CallOption
- Seek []gax.CallOption
- }
-
- func defaultSubscriberClientOptions() []option.ClientOption {
- return []option.ClientOption{
- option.WithEndpoint("pubsub.googleapis.com:443"),
- option.WithScopes(DefaultAuthScopes()...),
- }
- }
-
- func defaultSubscriberCallOptions() *SubscriberCallOptions {
- retry := map[[2]string][]gax.CallOption{
- {"default", "idempotent"}: {
- gax.WithRetry(func() gax.Retryer {
- return gax.OnCodes([]codes.Code{
- codes.DeadlineExceeded,
- codes.Unavailable,
- }, gax.Backoff{
- Initial: 100 * time.Millisecond,
- Max: 60000 * time.Millisecond,
- Multiplier: 1.3,
- })
- }),
- },
- {"messaging", "pull"}: {
- gax.WithRetry(func() gax.Retryer {
- return gax.OnCodes([]codes.Code{
- codes.Canceled,
- codes.DeadlineExceeded,
- codes.Internal,
- codes.ResourceExhausted,
- codes.Unavailable,
- }, gax.Backoff{
- Initial: 100 * time.Millisecond,
- Max: 60000 * time.Millisecond,
- Multiplier: 1.3,
- })
- }),
- },
- {"streaming_messaging", "pull"}: {
- gax.WithRetry(func() gax.Retryer {
- return gax.OnCodes([]codes.Code{
- codes.Canceled,
- codes.DeadlineExceeded,
- codes.Internal,
- codes.ResourceExhausted,
- codes.Unavailable,
- }, gax.Backoff{
- Initial: 100 * time.Millisecond,
- Max: 60000 * time.Millisecond,
- Multiplier: 1.3,
- })
- }),
- },
- }
- return &SubscriberCallOptions{
- CreateSubscription: retry[[2]string{"default", "idempotent"}],
- GetSubscription: retry[[2]string{"default", "idempotent"}],
- UpdateSubscription: retry[[2]string{"default", "idempotent"}],
- ListSubscriptions: retry[[2]string{"default", "idempotent"}],
- DeleteSubscription: retry[[2]string{"default", "idempotent"}],
- ModifyAckDeadline: retry[[2]string{"default", "non_idempotent"}],
- Acknowledge: retry[[2]string{"messaging", "non_idempotent"}],
- Pull: retry[[2]string{"messaging", "pull"}],
- StreamingPull: retry[[2]string{"streaming_messaging", "pull"}],
- ModifyPushConfig: retry[[2]string{"default", "non_idempotent"}],
- ListSnapshots: retry[[2]string{"default", "idempotent"}],
- CreateSnapshot: retry[[2]string{"default", "idempotent"}],
- UpdateSnapshot: retry[[2]string{"default", "idempotent"}],
- DeleteSnapshot: retry[[2]string{"default", "idempotent"}],
- Seek: retry[[2]string{"default", "non_idempotent"}],
- }
- }
-
- // SubscriberClient is a client for interacting with Google Cloud Pub/Sub API.
- //
- // Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
- type SubscriberClient struct {
- // The connection to the service.
- conn *grpc.ClientConn
-
- // The gRPC API client.
- subscriberClient pubsubpb.SubscriberClient
-
- // The call options for this service.
- CallOptions *SubscriberCallOptions
-
- // The x-goog-* metadata to be sent with each request.
- xGoogMetadata metadata.MD
- }
-
- // NewSubscriberClient creates a new subscriber client.
- //
- // The service that an application uses to manipulate subscriptions and to
- // consume messages from a subscription via the Pull method.
- func NewSubscriberClient(ctx context.Context, opts ...option.ClientOption) (*SubscriberClient, error) {
- conn, err := transport.DialGRPC(ctx, append(defaultSubscriberClientOptions(), opts...)...)
- if err != nil {
- return nil, err
- }
- c := &SubscriberClient{
- conn: conn,
- CallOptions: defaultSubscriberCallOptions(),
-
- subscriberClient: pubsubpb.NewSubscriberClient(conn),
- }
- c.SetGoogleClientInfo()
- return c, nil
- }
-
- // Connection returns the client's connection to the API service.
- func (c *SubscriberClient) Connection() *grpc.ClientConn {
- return c.conn
- }
-
- // Close closes the connection to the API service. The user should invoke this when
- // the client is no longer required.
- func (c *SubscriberClient) Close() error {
- return c.conn.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 *SubscriberClient) SetGoogleClientInfo(keyval ...string) {
- kv := append([]string{"gl-go", version.Go()}, keyval...)
- kv = append(kv, "gapic", version.Repo, "gax", gax.Version, "grpc", grpc.Version)
- c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
- }
-
- func (c *SubscriberClient) SubscriptionIAM(subscription *pubsubpb.Subscription) *iam.Handle {
- return iam.InternalNewHandle(c.Connection(), subscription.Name)
- }
-
- func (c *SubscriberClient) TopicIAM(topic *pubsubpb.Topic) *iam.Handle {
- return iam.InternalNewHandle(c.Connection(), topic.Name)
- }
-
- // CreateSubscription creates a subscription to a given topic.
- // If the subscription already exists, returns ALREADY_EXISTS.
- // If the corresponding topic doesn't exist, returns NOT_FOUND.
- //
- // If the name is not provided in the request, the server will assign a random
- // name for this subscription on the same project as the topic, conforming
- // to the
- // resource name format (at https://cloud.google.com/pubsub/docs/overview#names).
- // The generated name is populated in the returned Subscription object.
- // Note that for REST API requests, you must specify a name in the request.
- func (c *SubscriberClient) CreateSubscription(ctx context.Context, req *pubsubpb.Subscription, opts ...gax.CallOption) (*pubsubpb.Subscription, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.CreateSubscription[0:len(c.CallOptions.CreateSubscription):len(c.CallOptions.CreateSubscription)], opts...)
- var resp *pubsubpb.Subscription
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.CreateSubscription(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // GetSubscription gets the configuration details of a subscription.
- func (c *SubscriberClient) GetSubscription(ctx context.Context, req *pubsubpb.GetSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.Subscription, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.GetSubscription[0:len(c.CallOptions.GetSubscription):len(c.CallOptions.GetSubscription)], opts...)
- var resp *pubsubpb.Subscription
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.GetSubscription(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // UpdateSubscription updates an existing subscription. Note that certain properties of a
- // subscription, such as its topic, are not modifiable.
- // NOTE: The style guide requires body: "subscription" instead of body: "*".
- // Keeping the latter for internal consistency in V1, however it should be
- // corrected in V2. See
- // https://cloud.google.com/apis/design/standard_methods#update for details.
- func (c *SubscriberClient) UpdateSubscription(ctx context.Context, req *pubsubpb.UpdateSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.Subscription, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.UpdateSubscription[0:len(c.CallOptions.UpdateSubscription):len(c.CallOptions.UpdateSubscription)], opts...)
- var resp *pubsubpb.Subscription
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.UpdateSubscription(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // ListSubscriptions lists matching subscriptions.
- func (c *SubscriberClient) ListSubscriptions(ctx context.Context, req *pubsubpb.ListSubscriptionsRequest, opts ...gax.CallOption) *SubscriptionIterator {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.ListSubscriptions[0:len(c.CallOptions.ListSubscriptions):len(c.CallOptions.ListSubscriptions)], opts...)
- it := &SubscriptionIterator{}
- it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Subscription, string, error) {
- var resp *pubsubpb.ListSubscriptionsResponse
- 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.subscriberClient.ListSubscriptions(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, "", err
- }
- return resp.Subscriptions, resp.NextPageToken, 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)
- return it
- }
-
- // DeleteSubscription deletes an existing subscription. All messages retained in the subscription
- // are immediately dropped. Calls to Pull after deletion will return
- // NOT_FOUND. After a subscription is deleted, a new one may be created with
- // the same name, but the new one has no association with the old
- // subscription or its topic unless the same topic is specified.
- func (c *SubscriberClient) DeleteSubscription(ctx context.Context, req *pubsubpb.DeleteSubscriptionRequest, opts ...gax.CallOption) error {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.DeleteSubscription[0:len(c.CallOptions.DeleteSubscription):len(c.CallOptions.DeleteSubscription)], opts...)
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- _, err = c.subscriberClient.DeleteSubscription(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- return err
- }
-
- // ModifyAckDeadline modifies the ack deadline for a specific message. This method is useful
- // to indicate that more time is needed to process a message by the
- // subscriber, or to make the message available for redelivery if the
- // processing was interrupted. Note that this does not modify the
- // subscription-level ackDeadlineSeconds used for subsequent messages.
- func (c *SubscriberClient) ModifyAckDeadline(ctx context.Context, req *pubsubpb.ModifyAckDeadlineRequest, opts ...gax.CallOption) error {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.ModifyAckDeadline[0:len(c.CallOptions.ModifyAckDeadline):len(c.CallOptions.ModifyAckDeadline)], opts...)
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- _, err = c.subscriberClient.ModifyAckDeadline(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- return err
- }
-
- // Acknowledge acknowledges the messages associated with the ack_ids in the
- // AcknowledgeRequest. The Pub/Sub system can remove the relevant messages
- // from the subscription.
- //
- // Acknowledging a message whose ack deadline has expired may succeed,
- // but such a message may be redelivered later. Acknowledging a message more
- // than once will not result in an error.
- func (c *SubscriberClient) Acknowledge(ctx context.Context, req *pubsubpb.AcknowledgeRequest, opts ...gax.CallOption) error {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.Acknowledge[0:len(c.CallOptions.Acknowledge):len(c.CallOptions.Acknowledge)], opts...)
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- _, err = c.subscriberClient.Acknowledge(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- return err
- }
-
- // Pull pulls messages from the server. Returns an empty list if there are no
- // messages available in the backlog. The server may return UNAVAILABLE if
- // there are too many concurrent pull requests pending for the given
- // subscription.
- func (c *SubscriberClient) Pull(ctx context.Context, req *pubsubpb.PullRequest, opts ...gax.CallOption) (*pubsubpb.PullResponse, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.Pull[0:len(c.CallOptions.Pull):len(c.CallOptions.Pull)], opts...)
- var resp *pubsubpb.PullResponse
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.Pull(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // StreamingPull (EXPERIMENTAL) StreamingPull is an experimental feature. This RPC will
- // respond with UNIMPLEMENTED errors unless you have been invited to test
- // this feature. Contact cloud-pubsub@google.com with any questions.
- //
- // Establishes a stream with the server, which sends messages down to the
- // client. The client streams acknowledgements and ack deadline modifications
- // back to the server. The server will close the stream and return the status
- // on any error. The server may close the stream with status OK to reassign
- // server-side resources, in which case, the client should re-establish the
- // stream. UNAVAILABLE may also be returned in the case of a transient error
- // (e.g., a server restart). These should also be retried by the client. Flow
- // control can be achieved by configuring the underlying RPC channel.
- func (c *SubscriberClient) StreamingPull(ctx context.Context, opts ...gax.CallOption) (pubsubpb.Subscriber_StreamingPullClient, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.StreamingPull[0:len(c.CallOptions.StreamingPull):len(c.CallOptions.StreamingPull)], opts...)
- var resp pubsubpb.Subscriber_StreamingPullClient
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.StreamingPull(ctx, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // ModifyPushConfig modifies the PushConfig for a specified subscription.
- //
- // This may be used to change a push subscription to a pull one (signified by
- // an empty PushConfig) or vice versa, or change the endpoint URL and other
- // attributes of a push subscription. Messages will accumulate for delivery
- // continuously through the call regardless of changes to the PushConfig.
- func (c *SubscriberClient) ModifyPushConfig(ctx context.Context, req *pubsubpb.ModifyPushConfigRequest, opts ...gax.CallOption) error {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.ModifyPushConfig[0:len(c.CallOptions.ModifyPushConfig):len(c.CallOptions.ModifyPushConfig)], opts...)
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- _, err = c.subscriberClient.ModifyPushConfig(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- return err
- }
-
- // ListSnapshots lists the existing snapshots.
- func (c *SubscriberClient) ListSnapshots(ctx context.Context, req *pubsubpb.ListSnapshotsRequest, opts ...gax.CallOption) *SnapshotIterator {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.ListSnapshots[0:len(c.CallOptions.ListSnapshots):len(c.CallOptions.ListSnapshots)], opts...)
- it := &SnapshotIterator{}
- it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Snapshot, string, error) {
- var resp *pubsubpb.ListSnapshotsResponse
- 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.subscriberClient.ListSnapshots(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, "", err
- }
- return resp.Snapshots, resp.NextPageToken, 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)
- return it
- }
-
- // CreateSnapshot creates a snapshot from the requested subscription.
- // If the snapshot already exists, returns ALREADY_EXISTS.
- // If the requested subscription doesn't exist, returns NOT_FOUND.
- //
- // If the name is not provided in the request, the server will assign a random
- // name for this snapshot on the same project as the subscription, conforming
- // to the
- // resource name format (at https://cloud.google.com/pubsub/docs/overview#names).
- // The generated name is populated in the returned Snapshot object.
- // Note that for REST API requests, you must specify a name in the request.
- func (c *SubscriberClient) CreateSnapshot(ctx context.Context, req *pubsubpb.CreateSnapshotRequest, opts ...gax.CallOption) (*pubsubpb.Snapshot, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.CreateSnapshot[0:len(c.CallOptions.CreateSnapshot):len(c.CallOptions.CreateSnapshot)], opts...)
- var resp *pubsubpb.Snapshot
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.CreateSnapshot(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // UpdateSnapshot updates an existing snapshot. Note that certain properties of a snapshot
- // are not modifiable.
- // NOTE: The style guide requires body: "snapshot" instead of body: "*".
- // Keeping the latter for internal consistency in V1, however it should be
- // corrected in V2. See
- // https://cloud.google.com/apis/design/standard_methods#update for details.
- func (c *SubscriberClient) UpdateSnapshot(ctx context.Context, req *pubsubpb.UpdateSnapshotRequest, opts ...gax.CallOption) (*pubsubpb.Snapshot, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.UpdateSnapshot[0:len(c.CallOptions.UpdateSnapshot):len(c.CallOptions.UpdateSnapshot)], opts...)
- var resp *pubsubpb.Snapshot
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.UpdateSnapshot(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // DeleteSnapshot removes an existing snapshot. All messages retained in the snapshot
- // are immediately dropped. After a snapshot is deleted, a new one may be
- // created with the same name, but the new one has no association with the old
- // snapshot or its subscription, unless the same subscription is specified.
- func (c *SubscriberClient) DeleteSnapshot(ctx context.Context, req *pubsubpb.DeleteSnapshotRequest, opts ...gax.CallOption) error {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.DeleteSnapshot[0:len(c.CallOptions.DeleteSnapshot):len(c.CallOptions.DeleteSnapshot)], opts...)
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- _, err = c.subscriberClient.DeleteSnapshot(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- return err
- }
-
- // Seek seeks an existing subscription to a point in time or to a given snapshot,
- // whichever is provided in the request.
- func (c *SubscriberClient) Seek(ctx context.Context, req *pubsubpb.SeekRequest, opts ...gax.CallOption) (*pubsubpb.SeekResponse, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.Seek[0:len(c.CallOptions.Seek):len(c.CallOptions.Seek)], opts...)
- var resp *pubsubpb.SeekResponse
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.subscriberClient.Seek(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // SnapshotIterator manages a stream of *pubsubpb.Snapshot.
- type SnapshotIterator struct {
- items []*pubsubpb.Snapshot
- pageInfo *iterator.PageInfo
- nextFunc func() error
-
- // 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 []*pubsubpb.Snapshot, nextPageToken string, err error)
- }
-
- // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
- func (it *SnapshotIterator) 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 *SnapshotIterator) Next() (*pubsubpb.Snapshot, error) {
- var item *pubsubpb.Snapshot
- if err := it.nextFunc(); err != nil {
- return item, err
- }
- item = it.items[0]
- it.items = it.items[1:]
- return item, nil
- }
-
- func (it *SnapshotIterator) bufLen() int {
- return len(it.items)
- }
-
- func (it *SnapshotIterator) takeBuf() interface{} {
- b := it.items
- it.items = nil
- return b
- }
-
- // SubscriptionIterator manages a stream of *pubsubpb.Subscription.
- type SubscriptionIterator struct {
- items []*pubsubpb.Subscription
- pageInfo *iterator.PageInfo
- nextFunc func() error
-
- // 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 []*pubsubpb.Subscription, nextPageToken string, err error)
- }
-
- // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
- func (it *SubscriptionIterator) 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 *SubscriptionIterator) Next() (*pubsubpb.Subscription, error) {
- var item *pubsubpb.Subscription
- if err := it.nextFunc(); err != nil {
- return item, err
- }
- item = it.items[0]
- it.items = it.items[1:]
- return item, nil
- }
-
- func (it *SubscriptionIterator) bufLen() int {
- return len(it.items)
- }
-
- func (it *SubscriptionIterator) takeBuf() interface{} {
- b := it.items
- it.items = nil
- return b
- }
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