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api_op_DescribeReservedInstances.go
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api_op_DescribeReservedInstances.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package opensearch
import (
"context"
"fmt"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
"github.com/aws/aws-sdk-go-v2/service/opensearch/types"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// Describes the Amazon OpenSearch Service instances that you have reserved in a
// given Region. For more information, see Reserved Instances in Amazon OpenSearch
// Service (https://docs.aws.amazon.com/opensearch-service/latest/developerguide/ri.html)
// .
func (c *Client) DescribeReservedInstances(ctx context.Context, params *DescribeReservedInstancesInput, optFns ...func(*Options)) (*DescribeReservedInstancesOutput, error) {
if params == nil {
params = &DescribeReservedInstancesInput{}
}
result, metadata, err := c.invokeOperation(ctx, "DescribeReservedInstances", params, optFns, c.addOperationDescribeReservedInstancesMiddlewares)
if err != nil {
return nil, err
}
out := result.(*DescribeReservedInstancesOutput)
out.ResultMetadata = metadata
return out, nil
}
// Container for the request parameters to the DescribeReservedInstances operation.
type DescribeReservedInstancesInput struct {
// An optional parameter that specifies the maximum number of results to return.
// You can use nextToken to get the next page of results.
MaxResults int32
// If your initial DescribeReservedInstances operation returns a nextToken , you
// can include the returned nextToken in subsequent DescribeReservedInstances
// operations, which returns results in the next page.
NextToken *string
// The reserved instance identifier filter value. Use this parameter to show only
// the reservation that matches the specified reserved OpenSearch instance ID.
ReservedInstanceId *string
noSmithyDocumentSerde
}
// Container for results from DescribeReservedInstances
type DescribeReservedInstancesOutput struct {
// When nextToken is returned, there are more results available. The value of
// nextToken is a unique pagination token for each page. Make the call again using
// the returned token to retrieve the next page.
NextToken *string
// List of Reserved Instances in the current Region.
ReservedInstances []types.ReservedInstance
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationDescribeReservedInstancesMiddlewares(stack *middleware.Stack, options Options) (err error) {
if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
return err
}
err = stack.Serialize.Add(&awsRestjson1_serializeOpDescribeReservedInstances{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsRestjson1_deserializeOpDescribeReservedInstances{}, middleware.After)
if err != nil {
return err
}
if err := addProtocolFinalizerMiddlewares(stack, options, "DescribeReservedInstances"); err != nil {
return fmt.Errorf("add protocol finalizers: %v", 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 = 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 = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeReservedInstances(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 = addRequestResponseLogging(stack, options); err != nil {
return err
}
if err = addDisableHTTPSMiddleware(stack, options); err != nil {
return err
}
return nil
}
// DescribeReservedInstancesAPIClient is a client that implements the
// DescribeReservedInstances operation.
type DescribeReservedInstancesAPIClient interface {
DescribeReservedInstances(context.Context, *DescribeReservedInstancesInput, ...func(*Options)) (*DescribeReservedInstancesOutput, error)
}
var _ DescribeReservedInstancesAPIClient = (*Client)(nil)
// DescribeReservedInstancesPaginatorOptions is the paginator options for
// DescribeReservedInstances
type DescribeReservedInstancesPaginatorOptions struct {
// An optional parameter that specifies the maximum number of results to return.
// You can use nextToken to get the next page of results.
Limit int32
// Set to true if pagination should stop if the service returns a pagination token
// that matches the most recent token provided to the service.
StopOnDuplicateToken bool
}
// DescribeReservedInstancesPaginator is a paginator for DescribeReservedInstances
type DescribeReservedInstancesPaginator struct {
options DescribeReservedInstancesPaginatorOptions
client DescribeReservedInstancesAPIClient
params *DescribeReservedInstancesInput
nextToken *string
firstPage bool
}
// NewDescribeReservedInstancesPaginator returns a new
// DescribeReservedInstancesPaginator
func NewDescribeReservedInstancesPaginator(client DescribeReservedInstancesAPIClient, params *DescribeReservedInstancesInput, optFns ...func(*DescribeReservedInstancesPaginatorOptions)) *DescribeReservedInstancesPaginator {
if params == nil {
params = &DescribeReservedInstancesInput{}
}
options := DescribeReservedInstancesPaginatorOptions{}
if params.MaxResults != 0 {
options.Limit = params.MaxResults
}
for _, fn := range optFns {
fn(&options)
}
return &DescribeReservedInstancesPaginator{
options: options,
client: client,
params: params,
firstPage: true,
nextToken: params.NextToken,
}
}
// HasMorePages returns a boolean indicating whether more pages are available
func (p *DescribeReservedInstancesPaginator) HasMorePages() bool {
return p.firstPage || (p.nextToken != nil && len(*p.nextToken) != 0)
}
// NextPage retrieves the next DescribeReservedInstances page.
func (p *DescribeReservedInstancesPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*DescribeReservedInstancesOutput, error) {
if !p.HasMorePages() {
return nil, fmt.Errorf("no more pages available")
}
params := *p.params
params.NextToken = p.nextToken
params.MaxResults = p.options.Limit
result, err := p.client.DescribeReservedInstances(ctx, ¶ms, optFns...)
if err != nil {
return nil, err
}
p.firstPage = false
prevToken := p.nextToken
p.nextToken = result.NextToken
if p.options.StopOnDuplicateToken &&
prevToken != nil &&
p.nextToken != nil &&
*prevToken == *p.nextToken {
p.nextToken = nil
}
return result, nil
}
func newServiceMetadataMiddleware_opDescribeReservedInstances(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
OperationName: "DescribeReservedInstances",
}
}