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api_op_TransactGetItems.go
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api_op_TransactGetItems.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package dynamodb
import (
"context"
"errors"
"fmt"
"github.com/aws/aws-sdk-go-v2/aws"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
internalauth "github.com/aws/aws-sdk-go-v2/internal/auth"
"github.com/aws/aws-sdk-go-v2/service/dynamodb/types"
internalEndpointDiscovery "github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery"
smithyendpoints "github.com/aws/smithy-go/endpoints"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// TransactGetItems is a synchronous operation that atomically retrieves multiple
// items from one or more tables (but not from indexes) in a single account and
// Region. A TransactGetItems call can contain up to 100 TransactGetItem objects,
// each of which contains a Get structure that specifies an item to retrieve from
// a table in the account and Region. A call to TransactGetItems cannot retrieve
// items from tables in more than one Amazon Web Services account or Region. The
// aggregate size of the items in the transaction cannot exceed 4 MB. DynamoDB
// rejects the entire TransactGetItems request if any of the following is true:
// - A conflicting operation is in the process of updating an item to be read.
// - There is insufficient provisioned capacity for the transaction to be
// completed.
// - There is a user error, such as an invalid data format.
// - The aggregate size of the items in the transaction exceeded 4 MB.
func (c *Client) TransactGetItems(ctx context.Context, params *TransactGetItemsInput, optFns ...func(*Options)) (*TransactGetItemsOutput, error) {
if params == nil {
params = &TransactGetItemsInput{}
}
result, metadata, err := c.invokeOperation(ctx, "TransactGetItems", params, optFns, c.addOperationTransactGetItemsMiddlewares)
if err != nil {
return nil, err
}
out := result.(*TransactGetItemsOutput)
out.ResultMetadata = metadata
return out, nil
}
type TransactGetItemsInput struct {
// An ordered array of up to 100 TransactGetItem objects, each of which contains a
// Get structure.
//
// This member is required.
TransactItems []types.TransactGetItem
// A value of TOTAL causes consumed capacity information to be returned, and a
// value of NONE prevents that information from being returned. No other value is
// valid.
ReturnConsumedCapacity types.ReturnConsumedCapacity
noSmithyDocumentSerde
}
type TransactGetItemsOutput struct {
// If the ReturnConsumedCapacity value was TOTAL , this is an array of
// ConsumedCapacity objects, one for each table addressed by TransactGetItem
// objects in the TransactItems parameter. These ConsumedCapacity objects report
// the read-capacity units consumed by the TransactGetItems call in that table.
ConsumedCapacity []types.ConsumedCapacity
// An ordered array of up to 100 ItemResponse objects, each of which corresponds
// to the TransactGetItem object in the same position in the TransactItems array.
// Each ItemResponse object contains a Map of the name-value pairs that are the
// projected attributes of the requested item. If a requested item could not be
// retrieved, the corresponding ItemResponse object is Null, or if the requested
// item has no projected attributes, the corresponding ItemResponse object is an
// empty Map.
Responses []types.ItemResponse
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationTransactGetItemsMiddlewares(stack *middleware.Stack, options Options) (err error) {
err = stack.Serialize.Add(&awsAwsjson10_serializeOpTransactGetItems{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpTransactGetItems{}, middleware.After)
if err != nil {
return err
}
if err = addlegacyEndpointContextSetter(stack, options); err != nil {
return err
}
if err = addSetLoggerMiddleware(stack, options); err != nil {
return err
}
if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
return err
}
if err = addResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = v4.AddComputePayloadSHA256Middleware(stack); err != nil {
return err
}
if err = addRetryMiddlewares(stack, options); err != nil {
return err
}
if err = addHTTPSignerV4Middleware(stack, options); err != nil {
return err
}
if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
return err
}
if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
return err
}
if err = addClientUserAgent(stack, options); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = addOpTransactGetItemsDiscoverEndpointMiddleware(stack, options, c); err != nil {
return err
}
if err = addTransactGetItemsResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = addOpTransactGetItemsValidationMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opTransactGetItems(options.Region), middleware.Before); err != nil {
return err
}
if err = awsmiddleware.AddRecursionDetection(stack); err != nil {
return err
}
if err = addRequestIDRetrieverMiddleware(stack); err != nil {
return err
}
if err = addResponseErrorMiddleware(stack); err != nil {
return err
}
if err = addValidateResponseChecksum(stack, options); err != nil {
return err
}
if err = addAcceptEncodingGzip(stack, options); err != nil {
return err
}
if err = addRequestResponseLogging(stack, options); err != nil {
return err
}
if err = addendpointDisableHTTPSMiddleware(stack, options); err != nil {
return err
}
return nil
}
func addOpTransactGetItemsDiscoverEndpointMiddleware(stack *middleware.Stack, o Options, c *Client) error {
return stack.Serialize.Insert(&internalEndpointDiscovery.DiscoverEndpoint{
Options: []func(*internalEndpointDiscovery.DiscoverEndpointOptions){
func(opt *internalEndpointDiscovery.DiscoverEndpointOptions) {
opt.DisableHTTPS = o.EndpointOptions.DisableHTTPS
opt.Logger = o.Logger
},
},
DiscoverOperation: c.fetchOpTransactGetItemsDiscoverEndpoint,
EndpointDiscoveryEnableState: o.EndpointDiscovery.EnableEndpointDiscovery,
EndpointDiscoveryRequired: false,
}, "ResolveEndpoint", middleware.After)
}
func (c *Client) fetchOpTransactGetItemsDiscoverEndpoint(ctx context.Context, input interface{}, optFns ...func(*internalEndpointDiscovery.DiscoverEndpointOptions)) (internalEndpointDiscovery.WeightedAddress, error) {
in, ok := input.(*TransactGetItemsInput)
if !ok {
return internalEndpointDiscovery.WeightedAddress{}, fmt.Errorf("unknown input type %T", input)
}
_ = in
identifierMap := make(map[string]string, 0)
key := fmt.Sprintf("DynamoDB.%v", identifierMap)
if v, ok := c.endpointCache.Get(key); ok {
return v, nil
}
discoveryOperationInput := &DescribeEndpointsInput{}
opt := internalEndpointDiscovery.DiscoverEndpointOptions{}
for _, fn := range optFns {
fn(&opt)
}
go c.handleEndpointDiscoveryFromService(ctx, discoveryOperationInput, key, opt)
return internalEndpointDiscovery.WeightedAddress{}, nil
}
func newServiceMetadataMiddleware_opTransactGetItems(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
SigningName: "dynamodb",
OperationName: "TransactGetItems",
}
}
type opTransactGetItemsResolveEndpointMiddleware struct {
EndpointResolver EndpointResolverV2
BuiltInResolver builtInParameterResolver
}
func (*opTransactGetItemsResolveEndpointMiddleware) ID() string {
return "ResolveEndpointV2"
}
func (m *opTransactGetItemsResolveEndpointMiddleware) HandleSerialize(ctx context.Context, in middleware.SerializeInput, next middleware.SerializeHandler) (
out middleware.SerializeOutput, metadata middleware.Metadata, err error,
) {
if awsmiddleware.GetRequiresLegacyEndpoints(ctx) {
return next.HandleSerialize(ctx, in)
}
req, ok := in.Request.(*smithyhttp.Request)
if !ok {
return out, metadata, fmt.Errorf("unknown transport type %T", in.Request)
}
if m.EndpointResolver == nil {
return out, metadata, fmt.Errorf("expected endpoint resolver to not be nil")
}
params := EndpointParameters{}
m.BuiltInResolver.ResolveBuiltIns(¶ms)
var resolvedEndpoint smithyendpoints.Endpoint
resolvedEndpoint, err = m.EndpointResolver.ResolveEndpoint(ctx, params)
if err != nil {
return out, metadata, fmt.Errorf("failed to resolve service endpoint, %w", err)
}
req.URL = &resolvedEndpoint.URI
for k := range resolvedEndpoint.Headers {
req.Header.Set(
k,
resolvedEndpoint.Headers.Get(k),
)
}
authSchemes, err := internalauth.GetAuthenticationSchemes(&resolvedEndpoint.Properties)
if err != nil {
var nfe *internalauth.NoAuthenticationSchemesFoundError
if errors.As(err, &nfe) {
// if no auth scheme is found, default to sigv4
signingName := "dynamodb"
signingRegion := m.BuiltInResolver.(*builtInResolver).Region
ctx = awsmiddleware.SetSigningName(ctx, signingName)
ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)
}
var ue *internalauth.UnSupportedAuthenticationSchemeSpecifiedError
if errors.As(err, &ue) {
return out, metadata, fmt.Errorf(
"This operation requests signer version(s) %v but the client only supports %v",
ue.UnsupportedSchemes,
internalauth.SupportedSchemes,
)
}
}
for _, authScheme := range authSchemes {
switch authScheme.(type) {
case *internalauth.AuthenticationSchemeV4:
v4Scheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4)
var signingName, signingRegion string
if v4Scheme.SigningName == nil {
signingName = "dynamodb"
} else {
signingName = *v4Scheme.SigningName
}
if v4Scheme.SigningRegion == nil {
signingRegion = m.BuiltInResolver.(*builtInResolver).Region
} else {
signingRegion = *v4Scheme.SigningRegion
}
if v4Scheme.DisableDoubleEncoding != nil {
// The signer sets an equivalent value at client initialization time.
// Setting this context value will cause the signer to extract it
// and override the value set at client initialization time.
ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4Scheme.DisableDoubleEncoding)
}
ctx = awsmiddleware.SetSigningName(ctx, signingName)
ctx = awsmiddleware.SetSigningRegion(ctx, signingRegion)
break
case *internalauth.AuthenticationSchemeV4A:
v4aScheme, _ := authScheme.(*internalauth.AuthenticationSchemeV4A)
if v4aScheme.SigningName == nil {
v4aScheme.SigningName = aws.String("dynamodb")
}
if v4aScheme.DisableDoubleEncoding != nil {
// The signer sets an equivalent value at client initialization time.
// Setting this context value will cause the signer to extract it
// and override the value set at client initialization time.
ctx = internalauth.SetDisableDoubleEncoding(ctx, *v4aScheme.DisableDoubleEncoding)
}
ctx = awsmiddleware.SetSigningName(ctx, *v4aScheme.SigningName)
ctx = awsmiddleware.SetSigningRegion(ctx, v4aScheme.SigningRegionSet[0])
break
case *internalauth.AuthenticationSchemeNone:
break
}
}
return next.HandleSerialize(ctx, in)
}
func addTransactGetItemsResolveEndpointMiddleware(stack *middleware.Stack, options Options) error {
return stack.Serialize.Insert(&opTransactGetItemsResolveEndpointMiddleware{
EndpointResolver: options.EndpointResolverV2,
BuiltInResolver: &builtInResolver{
Region: options.Region,
UseDualStack: options.EndpointOptions.UseDualStackEndpoint,
UseFIPS: options.EndpointOptions.UseFIPSEndpoint,
Endpoint: options.BaseEndpoint,
},
}, "ResolveEndpoint", middleware.After)
}