| // Copyright 2017, Google Inc. All rights reserved. |
| // |
| // 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 |
| // |
| // http://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" |
| ) |
| |
| var ( |
| subscriberProjectPathTemplate = gax.MustCompilePathTemplate("projects/{project}") |
| subscriberSnapshotPathTemplate = gax.MustCompilePathTemplate("projects/{project}/snapshots/{snapshot}") |
| subscriberSubscriptionPathTemplate = gax.MustCompilePathTemplate("projects/{project}/subscriptions/{subscription}") |
| subscriberTopicPathTemplate = gax.MustCompilePathTemplate("projects/{project}/topics/{topic}") |
| ) |
| |
| // 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 |
| 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.ResourceExhausted, |
| codes.Internal, |
| 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{"messaging", "pull"}], |
| ModifyPushConfig: retry[[2]string{"default", "non_idempotent"}], |
| ListSnapshots: retry[[2]string{"default", "idempotent"}], |
| CreateSnapshot: 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. |
| 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 metadata to be sent with each request. |
| xGoogHeader []string |
| } |
| |
| // 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.xGoogHeader = []string{gax.XGoogHeader(kv...)} |
| } |
| |
| // SubscriberProjectPath returns the path for the project resource. |
| func SubscriberProjectPath(project string) string { |
| path, err := subscriberProjectPathTemplate.Render(map[string]string{ |
| "project": project, |
| }) |
| if err != nil { |
| panic(err) |
| } |
| return path |
| } |
| |
| // SubscriberSnapshotPath returns the path for the snapshot resource. |
| func SubscriberSnapshotPath(project, snapshot string) string { |
| path, err := subscriberSnapshotPathTemplate.Render(map[string]string{ |
| "project": project, |
| "snapshot": snapshot, |
| }) |
| if err != nil { |
| panic(err) |
| } |
| return path |
| } |
| |
| // SubscriberSubscriptionPath returns the path for the subscription resource. |
| func SubscriberSubscriptionPath(project, subscription string) string { |
| path, err := subscriberSubscriptionPathTemplate.Render(map[string]string{ |
| "project": project, |
| "subscription": subscription, |
| }) |
| if err != nil { |
| panic(err) |
| } |
| return path |
| } |
| |
| // SubscriberTopicPath returns the path for the topic resource. |
| func SubscriberTopicPath(project, topic string) string { |
| path, err := subscriberTopicPathTemplate.Render(map[string]string{ |
| "project": project, |
| "topic": topic, |
| }) |
| if err != nil { |
| panic(err) |
| } |
| return path |
| } |
| |
| 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](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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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. |
| func (c *SubscriberClient) UpdateSubscription(ctx context.Context, req *pubsubpb.UpdateSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.Subscription, error) { |
| ctx = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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](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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 |
| } |
| |
| // 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 = insertXGoog(ctx, c.xGoogHeader) |
| 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 |
| } |
