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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 vision
import (
"time"
"cloud.google.com/go/internal/version"
"cloud.google.com/go/longrunning"
lroauto "cloud.google.com/go/longrunning/autogen"
gax "github.com/googleapis/gax-go"
"golang.org/x/net/context"
"google.golang.org/api/option"
"google.golang.org/api/transport"
visionpb "google.golang.org/genproto/googleapis/cloud/vision/v1"
longrunningpb "google.golang.org/genproto/googleapis/longrunning"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
)
// ImageAnnotatorCallOptions contains the retry settings for each method of ImageAnnotatorClient.
type ImageAnnotatorCallOptions struct {
BatchAnnotateImages []gax.CallOption
AsyncBatchAnnotateFiles []gax.CallOption
}
func defaultImageAnnotatorClientOptions() []option.ClientOption {
return []option.ClientOption{
option.WithEndpoint("vision.googleapis.com:443"),
option.WithScopes(DefaultAuthScopes()...),
}
}
func defaultImageAnnotatorCallOptions() *ImageAnnotatorCallOptions {
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,
})
}),
},
}
return &ImageAnnotatorCallOptions{
BatchAnnotateImages: retry[[2]string{"default", "idempotent"}],
AsyncBatchAnnotateFiles: retry[[2]string{"default", "idempotent"}],
}
}
// ImageAnnotatorClient is a client for interacting with Cloud Vision API.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type ImageAnnotatorClient struct {
// The connection to the service.
conn *grpc.ClientConn
// The gRPC API client.
imageAnnotatorClient visionpb.ImageAnnotatorClient
// LROClient is used internally to handle longrunning operations.
// It is exposed so that its CallOptions can be modified if required.
// Users should not Close this client.
LROClient *lroauto.OperationsClient
// The call options for this service.
CallOptions *ImageAnnotatorCallOptions
// The x-goog-* metadata to be sent with each request.
xGoogMetadata metadata.MD
}
// NewImageAnnotatorClient creates a new image annotator client.
//
// Service that performs Google Cloud Vision API detection tasks over client
// images, such as face, landmark, logo, label, and text detection. The
// ImageAnnotator service returns detected entities from the images.
func NewImageAnnotatorClient(ctx context.Context, opts ...option.ClientOption) (*ImageAnnotatorClient, error) {
conn, err := transport.DialGRPC(ctx, append(defaultImageAnnotatorClientOptions(), opts...)...)
if err != nil {
return nil, err
}
c := &ImageAnnotatorClient{
conn: conn,
CallOptions: defaultImageAnnotatorCallOptions(),
imageAnnotatorClient: visionpb.NewImageAnnotatorClient(conn),
}
c.setGoogleClientInfo()
c.LROClient, err = lroauto.NewOperationsClient(ctx, option.WithGRPCConn(conn))
if err != nil {
// This error "should not happen", since we are just reusing old connection
// and never actually need to dial.
// If this does happen, we could leak conn. However, we cannot close conn:
// If the user invoked the function with option.WithGRPCConn,
// we would close a connection that's still in use.
// TODO(pongad): investigate error conditions.
return nil, err
}
return c, nil
}
// Connection returns the client's connection to the API service.
func (c *ImageAnnotatorClient) 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 *ImageAnnotatorClient) 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 *ImageAnnotatorClient) 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...))
}
// BatchAnnotateImages run image detection and annotation for a batch of images.
func (c *ImageAnnotatorClient) BatchAnnotateImages(ctx context.Context, req *visionpb.BatchAnnotateImagesRequest, opts ...gax.CallOption) (*visionpb.BatchAnnotateImagesResponse, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.BatchAnnotateImages[0:len(c.CallOptions.BatchAnnotateImages):len(c.CallOptions.BatchAnnotateImages)], opts...)
var resp *visionpb.BatchAnnotateImagesResponse
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.imageAnnotatorClient.BatchAnnotateImages(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// AsyncBatchAnnotateFiles run asynchronous image detection and annotation for a list of generic
// files, such as PDF files, which may contain multiple pages and multiple
// images per page. Progress and results can be retrieved through the
// google.longrunning.Operations interface.
// Operation.metadata contains OperationMetadata (metadata).
// Operation.response contains AsyncBatchAnnotateFilesResponse (results).
func (c *ImageAnnotatorClient) AsyncBatchAnnotateFiles(ctx context.Context, req *visionpb.AsyncBatchAnnotateFilesRequest, opts ...gax.CallOption) (*AsyncBatchAnnotateFilesOperation, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.AsyncBatchAnnotateFiles[0:len(c.CallOptions.AsyncBatchAnnotateFiles):len(c.CallOptions.AsyncBatchAnnotateFiles)], opts...)
var resp *longrunningpb.Operation
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.imageAnnotatorClient.AsyncBatchAnnotateFiles(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return &AsyncBatchAnnotateFilesOperation{
lro: longrunning.InternalNewOperation(c.LROClient, resp),
}, nil
}
// AsyncBatchAnnotateFilesOperation manages a long-running operation from AsyncBatchAnnotateFiles.
type AsyncBatchAnnotateFilesOperation struct {
lro *longrunning.Operation
}
// AsyncBatchAnnotateFilesOperation returns a new AsyncBatchAnnotateFilesOperation from a given name.
// The name must be that of a previously created AsyncBatchAnnotateFilesOperation, possibly from a different process.
func (c *ImageAnnotatorClient) AsyncBatchAnnotateFilesOperation(name string) *AsyncBatchAnnotateFilesOperation {
return &AsyncBatchAnnotateFilesOperation{
lro: longrunning.InternalNewOperation(c.LROClient, &longrunningpb.Operation{Name: name}),
}
}
// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *AsyncBatchAnnotateFilesOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*visionpb.AsyncBatchAnnotateFilesResponse, error) {
var resp visionpb.AsyncBatchAnnotateFilesResponse
if err := op.lro.WaitWithInterval(ctx, &resp, 45000*time.Millisecond, opts...); err != nil {
return nil, err
}
return &resp, nil
}
// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *AsyncBatchAnnotateFilesOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*visionpb.AsyncBatchAnnotateFilesResponse, error) {
var resp visionpb.AsyncBatchAnnotateFilesResponse
if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
return nil, err
}
if !op.Done() {
return nil, nil
}
return &resp, nil
}
// Metadata returns metadata associated with the long-running operation.
// Metadata itself does not contact the server, but Poll does.
// To get the latest metadata, call this method after a successful call to Poll.
// If the metadata is not available, the returned metadata and error are both nil.
func (op *AsyncBatchAnnotateFilesOperation) Metadata() (*visionpb.OperationMetadata, error) {
var meta visionpb.OperationMetadata
if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
return nil, nil
} else if err != nil {
return nil, err
}
return &meta, nil
}
// Done reports whether the long-running operation has completed.
func (op *AsyncBatchAnnotateFilesOperation) Done() bool {
return op.lro.Done()
}
// Name returns the name of the long-running operation.
// The name is assigned by the server and is unique within the service from which the operation is created.
func (op *AsyncBatchAnnotateFilesOperation) Name() string {
return op.lro.Name()
}
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