Current File : //home/waritko/go/src/cloud.google.com/go/dialogflow/apiv2/contexts_client.go
// 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 dialogflow
import (
"math"
"time"
"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"
dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
)
// ContextsCallOptions contains the retry settings for each method of ContextsClient.
type ContextsCallOptions struct {
ListContexts []gax.CallOption
GetContext []gax.CallOption
CreateContext []gax.CallOption
UpdateContext []gax.CallOption
DeleteContext []gax.CallOption
DeleteAllContexts []gax.CallOption
}
func defaultContextsClientOptions() []option.ClientOption {
return []option.ClientOption{
option.WithEndpoint("dialogflow.googleapis.com:443"),
option.WithScopes(DefaultAuthScopes()...),
}
}
func defaultContextsCallOptions() *ContextsCallOptions {
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 &ContextsCallOptions{
ListContexts: retry[[2]string{"default", "idempotent"}],
GetContext: retry[[2]string{"default", "idempotent"}],
CreateContext: retry[[2]string{"default", "non_idempotent"}],
UpdateContext: retry[[2]string{"default", "non_idempotent"}],
DeleteContext: retry[[2]string{"default", "idempotent"}],
DeleteAllContexts: retry[[2]string{"default", "idempotent"}],
}
}
// ContextsClient is a client for interacting with Dialogflow API.
type ContextsClient struct {
// The connection to the service.
conn *grpc.ClientConn
// The gRPC API client.
contextsClient dialogflowpb.ContextsClient
// The call options for this service.
CallOptions *ContextsCallOptions
// The x-goog-* metadata to be sent with each request.
xGoogMetadata metadata.MD
}
// NewContextsClient creates a new contexts client.
//
// A context represents additional information included with user input or with
// an intent returned by the Dialogflow API. Contexts are helpful for
// differentiating user input which may be vague or have a different meaning
// depending on additional details from your application such as user setting
// and preferences, previous user input, where the user is in your application,
// geographic location, and so on.
//
// You can include contexts as input parameters of a
// [DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] (or
// [StreamingDetectIntent][google.cloud.dialogflow.v2.Sessions.StreamingDetectIntent]) request,
// or as output contexts included in the returned intent.
// Contexts expire when an intent is matched, after the number of DetectIntent
// requests specified by the lifespan_count parameter, or after 10 minutes
// if no intents are matched for a DetectIntent request.
//
// For more information about contexts, see the
// Dialogflow documentation (at https://dialogflow.com/docs/contexts).
func NewContextsClient(ctx context.Context, opts ...option.ClientOption) (*ContextsClient, error) {
conn, err := transport.DialGRPC(ctx, append(defaultContextsClientOptions(), opts...)...)
if err != nil {
return nil, err
}
c := &ContextsClient{
conn: conn,
CallOptions: defaultContextsCallOptions(),
contextsClient: dialogflowpb.NewContextsClient(conn),
}
c.setGoogleClientInfo()
return c, nil
}
// Connection returns the client's connection to the API service.
func (c *ContextsClient) 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 *ContextsClient) 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 *ContextsClient) 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...))
}
// ListContexts returns the list of all contexts in the specified session.
func (c *ContextsClient) ListContexts(ctx context.Context, req *dialogflowpb.ListContextsRequest, opts ...gax.CallOption) *ContextIterator {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.ListContexts[0:len(c.CallOptions.ListContexts):len(c.CallOptions.ListContexts)], opts...)
it := &ContextIterator{}
it.InternalFetch = func(pageSize int, pageToken string) ([]*dialogflowpb.Context, string, error) {
var resp *dialogflowpb.ListContextsResponse
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.contextsClient.ListContexts(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, "", err
}
return resp.Contexts, 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
}
// GetContext retrieves the specified context.
func (c *ContextsClient) GetContext(ctx context.Context, req *dialogflowpb.GetContextRequest, opts ...gax.CallOption) (*dialogflowpb.Context, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.GetContext[0:len(c.CallOptions.GetContext):len(c.CallOptions.GetContext)], opts...)
var resp *dialogflowpb.Context
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.contextsClient.GetContext(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// CreateContext creates a context.
func (c *ContextsClient) CreateContext(ctx context.Context, req *dialogflowpb.CreateContextRequest, opts ...gax.CallOption) (*dialogflowpb.Context, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.CreateContext[0:len(c.CallOptions.CreateContext):len(c.CallOptions.CreateContext)], opts...)
var resp *dialogflowpb.Context
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.contextsClient.CreateContext(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// UpdateContext updates the specified context.
func (c *ContextsClient) UpdateContext(ctx context.Context, req *dialogflowpb.UpdateContextRequest, opts ...gax.CallOption) (*dialogflowpb.Context, error) {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.UpdateContext[0:len(c.CallOptions.UpdateContext):len(c.CallOptions.UpdateContext)], opts...)
var resp *dialogflowpb.Context
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.contextsClient.UpdateContext(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// DeleteContext deletes the specified context.
func (c *ContextsClient) DeleteContext(ctx context.Context, req *dialogflowpb.DeleteContextRequest, opts ...gax.CallOption) error {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.DeleteContext[0:len(c.CallOptions.DeleteContext):len(c.CallOptions.DeleteContext)], opts...)
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
_, err = c.contextsClient.DeleteContext(ctx, req, settings.GRPC...)
return err
}, opts...)
return err
}
// DeleteAllContexts deletes all active contexts in the specified session.
func (c *ContextsClient) DeleteAllContexts(ctx context.Context, req *dialogflowpb.DeleteAllContextsRequest, opts ...gax.CallOption) error {
ctx = insertMetadata(ctx, c.xGoogMetadata)
opts = append(c.CallOptions.DeleteAllContexts[0:len(c.CallOptions.DeleteAllContexts):len(c.CallOptions.DeleteAllContexts)], opts...)
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
_, err = c.contextsClient.DeleteAllContexts(ctx, req, settings.GRPC...)
return err
}, opts...)
return err
}
// ContextIterator manages a stream of *dialogflowpb.Context.
type ContextIterator struct {
items []*dialogflowpb.Context
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 []*dialogflowpb.Context, nextPageToken string, err error)
}
// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *ContextIterator) 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 *ContextIterator) Next() (*dialogflowpb.Context, error) {
var item *dialogflowpb.Context
if err := it.nextFunc(); err != nil {
return item, err
}
item = it.items[0]
it.items = it.items[1:]
return item, nil
}
func (it *ContextIterator) bufLen() int {
return len(it.items)
}
func (it *ContextIterator) takeBuf() interface{} {
b := it.items
it.items = nil
return b
}
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