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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"
)
// 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.DeadlineExceeded,
codes.Unavailable,
}, gax.Backoff{
Initial: 100 * time.Millisecond,
Max: 60000 * time.Millisecond,
Multiplier: 1.3,
})
}),
},
{"messaging", "one_plus_delivery"}: {
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", "idempotent"}],
UpdateTopic: retry[[2]string{"default", "idempotent"}],
Publish: retry[[2]string{"messaging", "one_plus_delivery"}],
GetTopic: retry[[2]string{"default", "idempotent"}],
ListTopics: retry[[2]string{"default", "idempotent"}],
ListTopicSubscriptions: retry[[2]string{"default", "idempotent"}],
DeleteTopic: retry[[2]string{"default", "idempotent"}],
}
}
// PublisherClient is a client for interacting with Google Cloud Pub/Sub API.
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", 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 *PublisherClient) SubscriptionIAM(subscription *pubsubpb.Subscription) *iam.Handle {
return iam.InternalNewHandle(c.Connection(), subscription.Name)
}
func (c *PublisherClient) TopicIAM(topic *pubsubpb.Topic) *iam.Handle {
return iam.InternalNewHandle(c.Connection(), topic.Name)
}
// CreateTopic creates the given topic with the given name.
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. Options settings follow the style guide:
// NOTE: The style guide requires body: "topic" 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 *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. The message payload must not be empty; it must contain
// either a non-empty data field, or at least one attribute.
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{}
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)
return it
}
// ListTopicSubscriptions lists the name of the subscriptions for 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{}
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)
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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