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speech_client.go
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speech_client.go
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// Copyright 2020 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 protoc-gen-go_gapic. DO NOT EDIT.
package speech
import (
"context"
"math"
"time"
"cloud.google.com/go/longrunning"
lroauto "cloud.google.com/go/longrunning/autogen"
gax "github.com/googleapis/gax-go/v2"
"google.golang.org/api/option"
gtransport "google.golang.org/api/transport/grpc"
speechpb "google.golang.org/genproto/googleapis/cloud/speech/v1p1beta1"
longrunningpb "google.golang.org/genproto/googleapis/longrunning"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
)
var newClientHook clientHook
// CallOptions contains the retry settings for each method of Client.
type CallOptions struct {
Recognize []gax.CallOption
LongRunningRecognize []gax.CallOption
StreamingRecognize []gax.CallOption
}
func defaultClientOptions() []option.ClientOption {
return []option.ClientOption{
option.WithEndpoint("speech.googleapis.com:443"),
option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
option.WithScopes(DefaultAuthScopes()...),
option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
grpc.MaxCallRecvMsgSize(math.MaxInt32))),
}
}
func defaultCallOptions() *CallOptions {
return &CallOptions{
Recognize: []gax.CallOption{
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: 1.30,
})
}),
},
LongRunningRecognize: []gax.CallOption{},
StreamingRecognize: []gax.CallOption{
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: 1.30,
})
}),
},
}
}
// Client is a client for interacting with Cloud Speech-to-Text API.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type Client struct {
// Connection pool of gRPC connections to the service.
connPool gtransport.ConnPool
// The gRPC API client.
client speechpb.SpeechClient
// 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 *CallOptions
// The x-goog-* metadata to be sent with each request.
xGoogMetadata metadata.MD
}
// NewClient creates a new speech client.
//
// Service that implements Google Cloud Speech API.
func NewClient(ctx context.Context, opts ...option.ClientOption) (*Client, error) {
clientOpts := defaultClientOptions()
if newClientHook != nil {
hookOpts, err := newClientHook(ctx, clientHookParams{})
if err != nil {
return nil, err
}
clientOpts = append(clientOpts, hookOpts...)
}
connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
if err != nil {
return nil, err
}
c := &Client{
connPool: connPool,
CallOptions: defaultCallOptions(),
client: speechpb.NewSpeechClient(connPool),
}
c.setGoogleClientInfo()
c.LROClient, err = lroauto.NewOperationsClient(ctx, gtransport.WithConnPool(connPool))
if err != nil {
// This error "should not happen", since we are just reusing old connection pool
// and never actually need to dial.
// If this does happen, we could leak connp. However, we cannot close conn:
// If the user invoked the constructor with option.WithGRPCConn,
// we would close a connection that's still in use.
// TODO: investigate error conditions.
return nil, err
}
return c, nil
}
// Connection returns a connection to the API service.
//
// Deprecated.
func (c *Client) Connection() *grpc.ClientConn {
return c.connPool.Conn()
}
// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *Client) Close() error {
return c.connPool.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 *Client) 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...))
}
// Recognize performs synchronous speech recognition: receive results after all audio
// has been sent and processed.
func (c *Client) Recognize(ctx context.Context, req *speechpb.RecognizeRequest, opts ...gax.CallOption) (*speechpb.RecognizeResponse, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.Recognize[0:len(c.CallOptions.Recognize):len(c.CallOptions.Recognize)], opts...)
var resp *speechpb.RecognizeResponse
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.client.Recognize(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// LongRunningRecognize performs asynchronous speech recognition: receive results via the
// google.longrunning.Operations interface. Returns either an
// Operation.error or an Operation.response which contains
// a LongRunningRecognizeResponse message.
// For more information on asynchronous speech recognition, see the
// how-to (at https://cloud.google.com/speech-to-text/docs/async-recognize).
func (c *Client) LongRunningRecognize(ctx context.Context, req *speechpb.LongRunningRecognizeRequest, opts ...gax.CallOption) (*LongRunningRecognizeOperation, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.LongRunningRecognize[0:len(c.CallOptions.LongRunningRecognize):len(c.CallOptions.LongRunningRecognize)], opts...)
var resp *longrunningpb.Operation
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.client.LongRunningRecognize(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return &LongRunningRecognizeOperation{
lro: longrunning.InternalNewOperation(c.LROClient, resp),
}, nil
}
// StreamingRecognize performs bidirectional streaming speech recognition: receive results while
// sending audio. This method is only available via the gRPC API (not REST).
func (c *Client) StreamingRecognize(ctx context.Context, opts ...gax.CallOption) (speechpb.Speech_StreamingRecognizeClient, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.StreamingRecognize[0:len(c.CallOptions.StreamingRecognize):len(c.CallOptions.StreamingRecognize)], opts...)
var resp speechpb.Speech_StreamingRecognizeClient
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.client.StreamingRecognize(ctx, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// LongRunningRecognizeOperation manages a long-running operation from LongRunningRecognize.
type LongRunningRecognizeOperation struct {
lro *longrunning.Operation
}
// LongRunningRecognizeOperation returns a new LongRunningRecognizeOperation from a given name.
// The name must be that of a previously created LongRunningRecognizeOperation, possibly from a different process.
func (c *Client) LongRunningRecognizeOperation(name string) *LongRunningRecognizeOperation {
return &LongRunningRecognizeOperation{
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 *LongRunningRecognizeOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*speechpb.LongRunningRecognizeResponse, error) {
var resp speechpb.LongRunningRecognizeResponse
if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, 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 *LongRunningRecognizeOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*speechpb.LongRunningRecognizeResponse, error) {
var resp speechpb.LongRunningRecognizeResponse
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 *LongRunningRecognizeOperation) Metadata() (*speechpb.LongRunningRecognizeMetadata, error) {
var meta speechpb.LongRunningRecognizeMetadata
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 *LongRunningRecognizeOperation) 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 *LongRunningRecognizeOperation) Name() string {
return op.lro.Name()
}