415 lines
14 KiB
Go
415 lines
14 KiB
Go
// Copyright 2017, Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// AUTO-GENERATED CODE. DO NOT EDIT.
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package pubsub
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import (
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"math"
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"time"
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"cloud.google.com/go/iam"
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"cloud.google.com/go/internal/version"
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gax "github.com/googleapis/gax-go"
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"golang.org/x/net/context"
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"google.golang.org/api/iterator"
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"google.golang.org/api/option"
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"google.golang.org/api/transport"
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pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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)
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// PublisherCallOptions contains the retry settings for each method of PublisherClient.
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type PublisherCallOptions struct {
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CreateTopic []gax.CallOption
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UpdateTopic []gax.CallOption
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Publish []gax.CallOption
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GetTopic []gax.CallOption
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ListTopics []gax.CallOption
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ListTopicSubscriptions []gax.CallOption
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DeleteTopic []gax.CallOption
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}
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func defaultPublisherClientOptions() []option.ClientOption {
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return []option.ClientOption{
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option.WithEndpoint("pubsub.googleapis.com:443"),
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option.WithScopes(DefaultAuthScopes()...),
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}
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}
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func defaultPublisherCallOptions() *PublisherCallOptions {
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retry := map[[2]string][]gax.CallOption{
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{"default", "idempotent"}: {
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gax.WithRetry(func() gax.Retryer {
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return gax.OnCodes([]codes.Code{
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codes.DeadlineExceeded,
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codes.Unavailable,
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}, gax.Backoff{
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Initial: 100 * time.Millisecond,
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Max: 60000 * time.Millisecond,
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Multiplier: 1.3,
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})
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}),
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},
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{"messaging", "one_plus_delivery"}: {
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gax.WithRetry(func() gax.Retryer {
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return gax.OnCodes([]codes.Code{
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codes.Canceled,
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codes.Unknown,
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codes.DeadlineExceeded,
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codes.ResourceExhausted,
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codes.Aborted,
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codes.Internal,
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codes.Unavailable,
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}, gax.Backoff{
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Initial: 100 * time.Millisecond,
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Max: 60000 * time.Millisecond,
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Multiplier: 1.3,
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})
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}),
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},
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}
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return &PublisherCallOptions{
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CreateTopic: retry[[2]string{"default", "idempotent"}],
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UpdateTopic: retry[[2]string{"default", "idempotent"}],
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Publish: retry[[2]string{"messaging", "one_plus_delivery"}],
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GetTopic: retry[[2]string{"default", "idempotent"}],
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ListTopics: retry[[2]string{"default", "idempotent"}],
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ListTopicSubscriptions: retry[[2]string{"default", "idempotent"}],
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DeleteTopic: retry[[2]string{"default", "idempotent"}],
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}
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}
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// PublisherClient is a client for interacting with Google Cloud Pub/Sub API.
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type PublisherClient struct {
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// The connection to the service.
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conn *grpc.ClientConn
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// The gRPC API client.
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publisherClient pubsubpb.PublisherClient
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// The call options for this service.
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CallOptions *PublisherCallOptions
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// The metadata to be sent with each request.
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xGoogHeader []string
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}
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// NewPublisherClient creates a new publisher client.
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//
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// The service that an application uses to manipulate topics, and to send
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// messages to a topic.
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func NewPublisherClient(ctx context.Context, opts ...option.ClientOption) (*PublisherClient, error) {
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conn, err := transport.DialGRPC(ctx, append(defaultPublisherClientOptions(), opts...)...)
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if err != nil {
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return nil, err
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}
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c := &PublisherClient{
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conn: conn,
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CallOptions: defaultPublisherCallOptions(),
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publisherClient: pubsubpb.NewPublisherClient(conn),
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}
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c.SetGoogleClientInfo()
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return c, nil
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}
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// Connection returns the client's connection to the API service.
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func (c *PublisherClient) Connection() *grpc.ClientConn {
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return c.conn
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}
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// Close closes the connection to the API service. The user should invoke this when
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// the client is no longer required.
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func (c *PublisherClient) Close() error {
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return c.conn.Close()
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}
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// SetGoogleClientInfo sets the name and version of the application in
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// the `x-goog-api-client` header passed on each request. Intended for
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// use by Google-written clients.
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func (c *PublisherClient) SetGoogleClientInfo(keyval ...string) {
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kv := append([]string{"gl-go", version.Go()}, keyval...)
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kv = append(kv, "gapic", version.Repo, "gax", gax.Version, "grpc", grpc.Version)
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c.xGoogHeader = []string{gax.XGoogHeader(kv...)}
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}
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// PublisherProjectPath returns the path for the project resource.
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func PublisherProjectPath(project string) string {
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return "" +
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"projects/" +
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project +
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""
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}
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// PublisherTopicPath returns the path for the topic resource.
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func PublisherTopicPath(project, topic string) string {
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return "" +
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"projects/" +
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project +
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"/topics/" +
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topic +
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""
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}
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func (c *PublisherClient) SubscriptionIAM(subscription *pubsubpb.Subscription) *iam.Handle {
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return iam.InternalNewHandle(c.Connection(), subscription.Name)
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}
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func (c *PublisherClient) TopicIAM(topic *pubsubpb.Topic) *iam.Handle {
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return iam.InternalNewHandle(c.Connection(), topic.Name)
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}
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// CreateTopic creates the given topic with the given name.
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func (c *PublisherClient) CreateTopic(ctx context.Context, req *pubsubpb.Topic, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
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ctx = insertXGoog(ctx, c.xGoogHeader)
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opts = append(c.CallOptions.CreateTopic[0:len(c.CallOptions.CreateTopic):len(c.CallOptions.CreateTopic)], opts...)
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var resp *pubsubpb.Topic
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err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
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var err error
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resp, err = c.publisherClient.CreateTopic(ctx, req, settings.GRPC...)
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return err
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}, opts...)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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// UpdateTopic updates an existing topic. Note that certain properties of a topic are not
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// modifiable. Options settings follow the style guide:
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// NOTE: The style guide requires body: "topic" instead of body: "*".
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// Keeping the latter for internal consistency in V1, however it should be
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// corrected in V2. See
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// https://cloud.google.com/apis/design/standard_methods#update for details.
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func (c *PublisherClient) UpdateTopic(ctx context.Context, req *pubsubpb.UpdateTopicRequest, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
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ctx = insertXGoog(ctx, c.xGoogHeader)
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opts = append(c.CallOptions.UpdateTopic[0:len(c.CallOptions.UpdateTopic):len(c.CallOptions.UpdateTopic)], opts...)
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var resp *pubsubpb.Topic
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err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
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var err error
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resp, err = c.publisherClient.UpdateTopic(ctx, req, settings.GRPC...)
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return err
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}, opts...)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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// Publish adds one or more messages to the topic. Returns NOT_FOUND if the topic
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// does not exist. The message payload must not be empty; it must contain
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// either a non-empty data field, or at least one attribute.
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func (c *PublisherClient) Publish(ctx context.Context, req *pubsubpb.PublishRequest, opts ...gax.CallOption) (*pubsubpb.PublishResponse, error) {
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ctx = insertXGoog(ctx, c.xGoogHeader)
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opts = append(c.CallOptions.Publish[0:len(c.CallOptions.Publish):len(c.CallOptions.Publish)], opts...)
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var resp *pubsubpb.PublishResponse
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err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
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var err error
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resp, err = c.publisherClient.Publish(ctx, req, settings.GRPC...)
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return err
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}, opts...)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetTopic gets the configuration of a topic.
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func (c *PublisherClient) GetTopic(ctx context.Context, req *pubsubpb.GetTopicRequest, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
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ctx = insertXGoog(ctx, c.xGoogHeader)
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opts = append(c.CallOptions.GetTopic[0:len(c.CallOptions.GetTopic):len(c.CallOptions.GetTopic)], opts...)
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var resp *pubsubpb.Topic
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err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
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var err error
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resp, err = c.publisherClient.GetTopic(ctx, req, settings.GRPC...)
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return err
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}, opts...)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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// ListTopics lists matching topics.
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func (c *PublisherClient) ListTopics(ctx context.Context, req *pubsubpb.ListTopicsRequest, opts ...gax.CallOption) *TopicIterator {
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ctx = insertXGoog(ctx, c.xGoogHeader)
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opts = append(c.CallOptions.ListTopics[0:len(c.CallOptions.ListTopics):len(c.CallOptions.ListTopics)], opts...)
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it := &TopicIterator{}
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it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Topic, string, error) {
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var resp *pubsubpb.ListTopicsResponse
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req.PageToken = pageToken
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if pageSize > math.MaxInt32 {
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req.PageSize = math.MaxInt32
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} else {
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req.PageSize = int32(pageSize)
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}
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err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
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var err error
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resp, err = c.publisherClient.ListTopics(ctx, req, settings.GRPC...)
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return err
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}, opts...)
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if err != nil {
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return nil, "", err
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}
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return resp.Topics, resp.NextPageToken, nil
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}
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fetch := func(pageSize int, pageToken string) (string, error) {
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items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
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if err != nil {
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return "", err
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}
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it.items = append(it.items, items...)
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return nextPageToken, nil
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}
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it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
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return it
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}
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// ListTopicSubscriptions lists the name of the subscriptions for this topic.
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func (c *PublisherClient) ListTopicSubscriptions(ctx context.Context, req *pubsubpb.ListTopicSubscriptionsRequest, opts ...gax.CallOption) *StringIterator {
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ctx = insertXGoog(ctx, c.xGoogHeader)
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opts = append(c.CallOptions.ListTopicSubscriptions[0:len(c.CallOptions.ListTopicSubscriptions):len(c.CallOptions.ListTopicSubscriptions)], opts...)
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it := &StringIterator{}
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it.InternalFetch = func(pageSize int, pageToken string) ([]string, string, error) {
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var resp *pubsubpb.ListTopicSubscriptionsResponse
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req.PageToken = pageToken
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if pageSize > math.MaxInt32 {
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req.PageSize = math.MaxInt32
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} else {
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req.PageSize = int32(pageSize)
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}
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err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
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var err error
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resp, err = c.publisherClient.ListTopicSubscriptions(ctx, req, settings.GRPC...)
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return err
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}, opts...)
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if err != nil {
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return nil, "", err
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}
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return resp.Subscriptions, resp.NextPageToken, nil
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}
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fetch := func(pageSize int, pageToken string) (string, error) {
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items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
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if err != nil {
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return "", err
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}
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it.items = append(it.items, items...)
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return nextPageToken, nil
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}
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it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
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return it
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}
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// DeleteTopic deletes the topic with the given name. Returns NOT_FOUND if the topic
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// does not exist. After a topic is deleted, a new topic may be created with
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// the same name; this is an entirely new topic with none of the old
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// configuration or subscriptions. Existing subscriptions to this topic are
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// not deleted, but their topic field is set to _deleted-topic_.
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func (c *PublisherClient) DeleteTopic(ctx context.Context, req *pubsubpb.DeleteTopicRequest, opts ...gax.CallOption) error {
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ctx = insertXGoog(ctx, c.xGoogHeader)
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opts = append(c.CallOptions.DeleteTopic[0:len(c.CallOptions.DeleteTopic):len(c.CallOptions.DeleteTopic)], opts...)
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err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
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var err error
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_, err = c.publisherClient.DeleteTopic(ctx, req, settings.GRPC...)
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return err
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}, opts...)
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return err
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}
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// StringIterator manages a stream of string.
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type StringIterator struct {
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items []string
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pageInfo *iterator.PageInfo
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nextFunc func() error
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// InternalFetch is for use by the Google Cloud Libraries only.
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// It is not part of the stable interface of this package.
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//
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// InternalFetch returns results from a single call to the underlying RPC.
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// The number of results is no greater than pageSize.
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// If there are no more results, nextPageToken is empty and err is nil.
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InternalFetch func(pageSize int, pageToken string) (results []string, nextPageToken string, err error)
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}
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// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
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func (it *StringIterator) PageInfo() *iterator.PageInfo {
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return it.pageInfo
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}
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// Next returns the next result. Its second return value is iterator.Done if there are no more
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// results. Once Next returns Done, all subsequent calls will return Done.
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func (it *StringIterator) Next() (string, error) {
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var item string
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if err := it.nextFunc(); err != nil {
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return item, err
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}
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item = it.items[0]
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it.items = it.items[1:]
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return item, nil
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}
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func (it *StringIterator) bufLen() int {
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return len(it.items)
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}
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func (it *StringIterator) takeBuf() interface{} {
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b := it.items
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it.items = nil
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return b
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}
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// TopicIterator manages a stream of *pubsubpb.Topic.
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type TopicIterator struct {
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items []*pubsubpb.Topic
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pageInfo *iterator.PageInfo
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nextFunc func() error
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// InternalFetch is for use by the Google Cloud Libraries only.
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// It is not part of the stable interface of this package.
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//
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// InternalFetch returns results from a single call to the underlying RPC.
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// The number of results is no greater than pageSize.
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// If there are no more results, nextPageToken is empty and err is nil.
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InternalFetch func(pageSize int, pageToken string) (results []*pubsubpb.Topic, nextPageToken string, err error)
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}
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// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
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func (it *TopicIterator) PageInfo() *iterator.PageInfo {
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return it.pageInfo
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}
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// Next returns the next result. Its second return value is iterator.Done if there are no more
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// results. Once Next returns Done, all subsequent calls will return Done.
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func (it *TopicIterator) Next() (*pubsubpb.Topic, error) {
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var item *pubsubpb.Topic
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if err := it.nextFunc(); err != nil {
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return item, err
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}
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item = it.items[0]
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it.items = it.items[1:]
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return item, nil
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}
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func (it *TopicIterator) bufLen() int {
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return len(it.items)
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}
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func (it *TopicIterator) takeBuf() interface{} {
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b := it.items
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it.items = nil
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return b
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}
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