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- // Copyright 2019 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 gapic-generator. DO NOT EDIT.
-
- package pubsub
-
- import (
- "context"
- "math"
- "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/transport"
- pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
- "google.golang.org/grpc"
- "google.golang.org/grpc/codes"
- "google.golang.org/grpc/metadata"
- )
-
- // PublisherCallOptions contains the retry settings for each method of PublisherClient.
- type PublisherCallOptions struct {
- CreateTopic []gax.CallOption
- UpdateTopic []gax.CallOption
- Publish []gax.CallOption
- GetTopic []gax.CallOption
- ListTopics []gax.CallOption
- ListTopicSubscriptions []gax.CallOption
- DeleteTopic []gax.CallOption
- }
-
- func defaultPublisherClientOptions() []option.ClientOption {
- return []option.ClientOption{
- option.WithEndpoint("pubsub.googleapis.com:443"),
- option.WithScopes(DefaultAuthScopes()...),
- }
- }
-
- func defaultPublisherCallOptions() *PublisherCallOptions {
- retry := map[[2]string][]gax.CallOption{
- {"default", "idempotent"}: {
- gax.WithRetry(func() gax.Retryer {
- return gax.OnCodes([]codes.Code{
- codes.Aborted,
- codes.Unavailable,
- codes.Unknown,
- }, gax.Backoff{
- Initial: 100 * time.Millisecond,
- Max: 60000 * time.Millisecond,
- Multiplier: 1.3,
- })
- }),
- },
- {"default", "non_idempotent"}: {
- gax.WithRetry(func() gax.Retryer {
- return gax.OnCodes([]codes.Code{
- codes.Unavailable,
- }, gax.Backoff{
- Initial: 100 * time.Millisecond,
- Max: 60000 * time.Millisecond,
- Multiplier: 1.3,
- })
- }),
- },
- {"messaging", "publish"}: {
- gax.WithRetry(func() gax.Retryer {
- return gax.OnCodes([]codes.Code{
- codes.Aborted,
- codes.Canceled,
- codes.DeadlineExceeded,
- codes.Internal,
- codes.ResourceExhausted,
- codes.Unavailable,
- codes.Unknown,
- }, gax.Backoff{
- Initial: 100 * time.Millisecond,
- Max: 60000 * time.Millisecond,
- Multiplier: 1.3,
- })
- }),
- },
- }
- return &PublisherCallOptions{
- CreateTopic: retry[[2]string{"default", "non_idempotent"}],
- UpdateTopic: retry[[2]string{"default", "non_idempotent"}],
- Publish: retry[[2]string{"messaging", "publish"}],
- GetTopic: retry[[2]string{"default", "idempotent"}],
- ListTopics: retry[[2]string{"default", "idempotent"}],
- ListTopicSubscriptions: retry[[2]string{"default", "idempotent"}],
- DeleteTopic: retry[[2]string{"default", "non_idempotent"}],
- }
- }
-
- // PublisherClient 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 PublisherClient struct {
- // The connection to the service.
- conn *grpc.ClientConn
-
- // The gRPC API client.
- publisherClient pubsubpb.PublisherClient
-
- // The call options for this service.
- CallOptions *PublisherCallOptions
-
- // The x-goog-* metadata to be sent with each request.
- xGoogMetadata metadata.MD
- }
-
- // NewPublisherClient creates a new publisher client.
- //
- // The service that an application uses to manipulate topics, and to send
- // messages to a topic.
- func NewPublisherClient(ctx context.Context, opts ...option.ClientOption) (*PublisherClient, error) {
- conn, err := transport.DialGRPC(ctx, append(defaultPublisherClientOptions(), opts...)...)
- if err != nil {
- return nil, err
- }
- c := &PublisherClient{
- conn: conn,
- CallOptions: defaultPublisherCallOptions(),
-
- publisherClient: pubsubpb.NewPublisherClient(conn),
- }
- c.SetGoogleClientInfo()
- return c, nil
- }
-
- // Connection returns the client's connection to the API service.
- func (c *PublisherClient) 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 *PublisherClient) 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 *PublisherClient) 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...))
- }
-
- // CreateTopic creates the given topic with the given name. See the
- // <a href="https://cloud.google.com/pubsub/docs/admin#resource_names">
- // resource name rules</a>.
- func (c *PublisherClient) CreateTopic(ctx context.Context, req *pubsubpb.Topic, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.CreateTopic[0:len(c.CallOptions.CreateTopic):len(c.CallOptions.CreateTopic)], opts...)
- var resp *pubsubpb.Topic
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.publisherClient.CreateTopic(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // UpdateTopic updates an existing topic. Note that certain properties of a
- // topic are not modifiable.
- func (c *PublisherClient) UpdateTopic(ctx context.Context, req *pubsubpb.UpdateTopicRequest, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.UpdateTopic[0:len(c.CallOptions.UpdateTopic):len(c.CallOptions.UpdateTopic)], opts...)
- var resp *pubsubpb.Topic
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.publisherClient.UpdateTopic(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // Publish adds one or more messages to the topic. Returns NOT_FOUND if the topic
- // does not exist.
- func (c *PublisherClient) Publish(ctx context.Context, req *pubsubpb.PublishRequest, opts ...gax.CallOption) (*pubsubpb.PublishResponse, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.Publish[0:len(c.CallOptions.Publish):len(c.CallOptions.Publish)], opts...)
- var resp *pubsubpb.PublishResponse
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.publisherClient.Publish(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // GetTopic gets the configuration of a topic.
- func (c *PublisherClient) GetTopic(ctx context.Context, req *pubsubpb.GetTopicRequest, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.GetTopic[0:len(c.CallOptions.GetTopic):len(c.CallOptions.GetTopic)], opts...)
- var resp *pubsubpb.Topic
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- resp, err = c.publisherClient.GetTopic(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, err
- }
- return resp, nil
- }
-
- // ListTopics lists matching topics.
- func (c *PublisherClient) ListTopics(ctx context.Context, req *pubsubpb.ListTopicsRequest, opts ...gax.CallOption) *TopicIterator {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.ListTopics[0:len(c.CallOptions.ListTopics):len(c.CallOptions.ListTopics)], opts...)
- it := &TopicIterator{}
- req = proto.Clone(req).(*pubsubpb.ListTopicsRequest)
- it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Topic, string, error) {
- var resp *pubsubpb.ListTopicsResponse
- 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.publisherClient.ListTopics(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- if err != nil {
- return nil, "", err
- }
- return resp.Topics, 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)
- it.pageInfo.MaxSize = int(req.PageSize)
- return it
- }
-
- // ListTopicSubscriptions lists the names of the subscriptions on this topic.
- func (c *PublisherClient) ListTopicSubscriptions(ctx context.Context, req *pubsubpb.ListTopicSubscriptionsRequest, opts ...gax.CallOption) *StringIterator {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.ListTopicSubscriptions[0:len(c.CallOptions.ListTopicSubscriptions):len(c.CallOptions.ListTopicSubscriptions)], opts...)
- it := &StringIterator{}
- req = proto.Clone(req).(*pubsubpb.ListTopicSubscriptionsRequest)
- it.InternalFetch = func(pageSize int, pageToken string) ([]string, string, error) {
- var resp *pubsubpb.ListTopicSubscriptionsResponse
- 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.publisherClient.ListTopicSubscriptions(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)
- it.pageInfo.MaxSize = int(req.PageSize)
- return it
- }
-
- // DeleteTopic deletes the topic with the given name. Returns NOT_FOUND if the topic
- // does not exist. After a topic is deleted, a new topic may be created with
- // the same name; this is an entirely new topic with none of the old
- // configuration or subscriptions. Existing subscriptions to this topic are
- // not deleted, but their topic field is set to _deleted-topic_.
- func (c *PublisherClient) DeleteTopic(ctx context.Context, req *pubsubpb.DeleteTopicRequest, opts ...gax.CallOption) error {
- ctx = insertMetadata(ctx, c.xGoogMetadata)
- opts = append(c.CallOptions.DeleteTopic[0:len(c.CallOptions.DeleteTopic):len(c.CallOptions.DeleteTopic)], opts...)
- err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
- var err error
- _, err = c.publisherClient.DeleteTopic(ctx, req, settings.GRPC...)
- return err
- }, opts...)
- return err
- }
-
- // StringIterator manages a stream of string.
- type StringIterator struct {
- items []string
- 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 []string, nextPageToken string, err error)
- }
-
- // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
- func (it *StringIterator) 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 *StringIterator) Next() (string, error) {
- var item string
- if err := it.nextFunc(); err != nil {
- return item, err
- }
- item = it.items[0]
- it.items = it.items[1:]
- return item, nil
- }
-
- func (it *StringIterator) bufLen() int {
- return len(it.items)
- }
-
- func (it *StringIterator) takeBuf() interface{} {
- b := it.items
- it.items = nil
- return b
- }
-
- // TopicIterator manages a stream of *pubsubpb.Topic.
- type TopicIterator struct {
- items []*pubsubpb.Topic
- 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.Topic, nextPageToken string, err error)
- }
-
- // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
- func (it *TopicIterator) 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 *TopicIterator) Next() (*pubsubpb.Topic, error) {
- var item *pubsubpb.Topic
- if err := it.nextFunc(); err != nil {
- return item, err
- }
- item = it.items[0]
- it.items = it.items[1:]
- return item, nil
- }
-
- func (it *TopicIterator) bufLen() int {
- return len(it.items)
- }
-
- func (it *TopicIterator) takeBuf() interface{} {
- b := it.items
- it.items = nil
- return b
- }
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