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// Copyright 2016 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 (
"fmt"
"math"
"runtime"
"time"
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"
iampb "google.golang.org/genproto/googleapis/iam/v1"
pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
)
var (
publisherProjectPathTemplate = gax.MustCompilePathTemplate("projects/{project}")
publisherTopicPathTemplate = gax.MustCompilePathTemplate("projects/{project}/topics/{topic}")
)
// PublisherCallOptions contains the retry settings for each method of PublisherClient.
type PublisherCallOptions struct {
CreateTopic []gax.CallOption
Publish []gax.CallOption
GetTopic []gax.CallOption
ListTopics []gax.CallOption
ListTopicSubscriptions []gax.CallOption
DeleteTopic []gax.CallOption
SetIamPolicy []gax.CallOption
GetIamPolicy []gax.CallOption
TestIamPermissions []gax.CallOption
}
func defaultPublisherClientOptions() []option.ClientOption {
return []option.ClientOption{
option.WithEndpoint("pubsub.googleapis.com:443"),
option.WithScopes(
"https://www.googleapis.com/auth/cloud-platform",
"https://www.googleapis.com/auth/pubsub",
),
}
}
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.DeadlineExceeded,
codes.Unavailable,
}, gax.Backoff{
Initial: 100 * time.Millisecond,
Max: 60000 * time.Millisecond,
Multiplier: 1.3,
})
}),
},
}
return &PublisherCallOptions{
CreateTopic: 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"}],
SetIamPolicy: retry[[2]string{"default", "non_idempotent"}],
GetIamPolicy: retry[[2]string{"default", "idempotent"}],
TestIamPermissions: retry[[2]string{"default", "non_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.
iamPolicyClient iampb.IAMPolicyClient
publisherClient pubsubpb.PublisherClient
// The call options for this service.
CallOptions *PublisherCallOptions
// The metadata to be sent with each request.
metadata map[string][]string
}
// 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(),
iamPolicyClient: iampb.NewIAMPolicyClient(conn),
publisherClient: pubsubpb.NewPublisherClient(conn),
}
c.SetGoogleClientInfo("gax", gax.Version)
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(name, version string) {
c.metadata = map[string][]string{
"x-goog-api-client": {fmt.Sprintf("%s/%s %s gax/%s go/%s", name, version, gapicNameVersion, gax.Version, runtime.Version())},
}
}
// PublisherProjectPath returns the path for the project resource.
func PublisherProjectPath(project string) string {
path, err := publisherProjectPathTemplate.Render(map[string]string{
"project": project,
})
if err != nil {
panic(err)
}
return path
}
// PublisherTopicPath returns the path for the topic resource.
func PublisherTopicPath(project, topic string) string {
path, err := publisherTopicPathTemplate.Render(map[string]string{
"project": project,
"topic": topic,
})
if err != nil {
panic(err)
}
return path
}
// CreateTopic creates the given topic with the given name.
func (c *PublisherClient) CreateTopic(ctx context.Context, req *pubsubpb.Topic) (*pubsubpb.Topic, error) {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
var resp *pubsubpb.Topic
err := gax.Invoke(ctx, func(ctx context.Context) error {
var err error
resp, err = c.publisherClient.CreateTopic(ctx, req)
return err
}, c.CallOptions.CreateTopic...)
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) (*pubsubpb.PublishResponse, error) {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
var resp *pubsubpb.PublishResponse
err := gax.Invoke(ctx, func(ctx context.Context) error {
var err error
resp, err = c.publisherClient.Publish(ctx, req)
return err
}, c.CallOptions.Publish...)
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) (*pubsubpb.Topic, error) {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
var resp *pubsubpb.Topic
err := gax.Invoke(ctx, func(ctx context.Context) error {
var err error
resp, err = c.publisherClient.GetTopic(ctx, req)
return err
}, c.CallOptions.GetTopic...)
if err != nil {
return nil, err
}
return resp, nil
}
// ListTopics lists matching topics.
func (c *PublisherClient) ListTopics(ctx context.Context, req *pubsubpb.ListTopicsRequest) *TopicIterator {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
it := &TopicIterator{}
fetch := func(pageSize int, pageToken string) (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) error {
var err error
resp, err = c.publisherClient.ListTopics(ctx, req)
return err
}, c.CallOptions.ListTopics...)
if err != nil {
return "", err
}
it.items = append(it.items, resp.Topics...)
return resp.NextPageToken, nil
}
bufLen := func() int { return len(it.items) }
takeBuf := func() interface{} {
b := it.items
it.items = nil
return b
}
it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, bufLen, takeBuf)
return it
}
// ListTopicSubscriptions lists the name of the subscriptions for this topic.
func (c *PublisherClient) ListTopicSubscriptions(ctx context.Context, req *pubsubpb.ListTopicSubscriptionsRequest) *StringIterator {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
it := &StringIterator{}
fetch := func(pageSize int, pageToken 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) error {
var err error
resp, err = c.publisherClient.ListTopicSubscriptions(ctx, req)
return err
}, c.CallOptions.ListTopicSubscriptions...)
if err != nil {
return "", err
}
it.items = append(it.items, resp.Subscriptions...)
return resp.NextPageToken, nil
}
bufLen := func() int { return len(it.items) }
takeBuf := func() interface{} {
b := it.items
it.items = nil
return b
}
it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, bufLen, 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) error {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
err := gax.Invoke(ctx, func(ctx context.Context) error {
var err error
_, err = c.publisherClient.DeleteTopic(ctx, req)
return err
}, c.CallOptions.DeleteTopic...)
return err
}
// SetIamPolicy sets the access control policy on the specified resource. Replaces any
// existing policy.
func (c *PublisherClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest) (*iampb.Policy, error) {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
var resp *iampb.Policy
err := gax.Invoke(ctx, func(ctx context.Context) error {
var err error
resp, err = c.iamPolicyClient.SetIamPolicy(ctx, req)
return err
}, c.CallOptions.SetIamPolicy...)
if err != nil {
return nil, err
}
return resp, nil
}
// GetIamPolicy gets the access control policy for a resource.
// Returns an empty policy if the resource exists and does not have a policy
// set.
func (c *PublisherClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest) (*iampb.Policy, error) {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
var resp *iampb.Policy
err := gax.Invoke(ctx, func(ctx context.Context) error {
var err error
resp, err = c.iamPolicyClient.GetIamPolicy(ctx, req)
return err
}, c.CallOptions.GetIamPolicy...)
if err != nil {
return nil, err
}
return resp, nil
}
// TestIamPermissions returns permissions that a caller has on the specified resource.
func (c *PublisherClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest) (*iampb.TestIamPermissionsResponse, error) {
md, _ := metadata.FromContext(ctx)
ctx = metadata.NewContext(ctx, metadata.Join(md, c.metadata))
var resp *iampb.TestIamPermissionsResponse
err := gax.Invoke(ctx, func(ctx context.Context) error {
var err error
resp, err = c.iamPolicyClient.TestIamPermissions(ctx, req)
return err
}, c.CallOptions.TestIamPermissions...)
if err != nil {
return nil, err
}
return resp, nil
}
// StringIterator manages a stream of string.
type StringIterator struct {
items []string
pageInfo *iterator.PageInfo
nextFunc func() 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) {
if err := it.nextFunc(); err != nil {
return "", err
}
item := it.items[0]
it.items = it.items[1:]
return item, nil
}
// TopicIterator manages a stream of *pubsubpb.Topic.
type TopicIterator struct {
items []*pubsubpb.Topic
pageInfo *iterator.PageInfo
nextFunc func() 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) {
if err := it.nextFunc(); err != nil {
return nil, err
}
item := it.items[0]
it.items = it.items[1:]
return item, nil
}