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api_op_DescribeNatGateways.go
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api_op_DescribeNatGateways.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package ec2
import (
"context"
"errors"
"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/ec2/types"
smithy "github.com/aws/smithy-go"
"github.com/aws/smithy-go/middleware"
smithytime "github.com/aws/smithy-go/time"
smithyhttp "github.com/aws/smithy-go/transport/http"
smithywaiter "github.com/aws/smithy-go/waiter"
"github.com/jmespath/go-jmespath"
"time"
)
// Describes one or more of your NAT gateways.
func (c *Client) DescribeNatGateways(ctx context.Context, params *DescribeNatGatewaysInput, optFns ...func(*Options)) (*DescribeNatGatewaysOutput, error) {
if params == nil {
params = &DescribeNatGatewaysInput{}
}
result, metadata, err := c.invokeOperation(ctx, "DescribeNatGateways", params, optFns, c.addOperationDescribeNatGatewaysMiddlewares)
if err != nil {
return nil, err
}
out := result.(*DescribeNatGatewaysOutput)
out.ResultMetadata = metadata
return out, nil
}
type DescribeNatGatewaysInput struct {
// Checks whether you have the required permissions for the action, without
// actually making the request, and provides an error response. If you have the
// required permissions, the error response is DryRunOperation. Otherwise, it is
// UnauthorizedOperation.
DryRun *bool
// One or more filters.
//
// * nat-gateway-id - The ID of the NAT gateway.
//
// * state -
// The state of the NAT gateway (pending | failed | available | deleting |
// deleted).
//
// * subnet-id - The ID of the subnet in which the NAT gateway
// resides.
//
// * tag: - The key/value combination of a tag assigned to the resource.
// Use the tag key in the filter name and the tag value as the filter value. For
// example, to find all resources that have a tag with the key Owner and the value
// TeamA, specify tag:Owner for the filter name and TeamA for the filter value.
//
// *
// tag-key - The key of a tag assigned to the resource. Use this filter to find all
// resources assigned a tag with a specific key, regardless of the tag value.
//
// *
// vpc-id - The ID of the VPC in which the NAT gateway resides.
Filter []types.Filter
// The maximum number of results to return with a single call. To retrieve the
// remaining results, make another call with the returned nextToken value.
MaxResults *int32
// One or more NAT gateway IDs.
NatGatewayIds []string
// The token for the next page of results.
NextToken *string
noSmithyDocumentSerde
}
type DescribeNatGatewaysOutput struct {
// Information about the NAT gateways.
NatGateways []types.NatGateway
// The token to use to retrieve the next page of results. This value is null when
// there are no more results to return.
NextToken *string
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationDescribeNatGatewaysMiddlewares(stack *middleware.Stack, options Options) (err error) {
err = stack.Serialize.Add(&awsEc2query_serializeOpDescribeNatGateways{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsEc2query_deserializeOpDescribeNatGateways{}, middleware.After)
if 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); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeNatGateways(options.Region), middleware.Before); 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
}
return nil
}
// DescribeNatGatewaysAPIClient is a client that implements the DescribeNatGateways
// operation.
type DescribeNatGatewaysAPIClient interface {
DescribeNatGateways(context.Context, *DescribeNatGatewaysInput, ...func(*Options)) (*DescribeNatGatewaysOutput, error)
}
var _ DescribeNatGatewaysAPIClient = (*Client)(nil)
// DescribeNatGatewaysPaginatorOptions is the paginator options for
// DescribeNatGateways
type DescribeNatGatewaysPaginatorOptions struct {
// The maximum number of results to return with a single call. To retrieve the
// remaining results, make another call with the returned nextToken value.
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
}
// DescribeNatGatewaysPaginator is a paginator for DescribeNatGateways
type DescribeNatGatewaysPaginator struct {
options DescribeNatGatewaysPaginatorOptions
client DescribeNatGatewaysAPIClient
params *DescribeNatGatewaysInput
nextToken *string
firstPage bool
}
// NewDescribeNatGatewaysPaginator returns a new DescribeNatGatewaysPaginator
func NewDescribeNatGatewaysPaginator(client DescribeNatGatewaysAPIClient, params *DescribeNatGatewaysInput, optFns ...func(*DescribeNatGatewaysPaginatorOptions)) *DescribeNatGatewaysPaginator {
if params == nil {
params = &DescribeNatGatewaysInput{}
}
options := DescribeNatGatewaysPaginatorOptions{}
if params.MaxResults != nil {
options.Limit = *params.MaxResults
}
for _, fn := range optFns {
fn(&options)
}
return &DescribeNatGatewaysPaginator{
options: options,
client: client,
params: params,
firstPage: true,
nextToken: params.NextToken,
}
}
// HasMorePages returns a boolean indicating whether more pages are available
func (p *DescribeNatGatewaysPaginator) HasMorePages() bool {
return p.firstPage || (p.nextToken != nil && len(*p.nextToken) != 0)
}
// NextPage retrieves the next DescribeNatGateways page.
func (p *DescribeNatGatewaysPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*DescribeNatGatewaysOutput, error) {
if !p.HasMorePages() {
return nil, fmt.Errorf("no more pages available")
}
params := *p.params
params.NextToken = p.nextToken
var limit *int32
if p.options.Limit > 0 {
limit = &p.options.Limit
}
params.MaxResults = limit
result, err := p.client.DescribeNatGateways(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
}
// NatGatewayAvailableWaiterOptions are waiter options for
// NatGatewayAvailableWaiter
type NatGatewayAvailableWaiterOptions struct {
// Set of options to modify how an operation is invoked. These apply to all
// operations invoked for this client. Use functional options on operation call to
// modify this list for per operation behavior.
APIOptions []func(*middleware.Stack) error
// MinDelay is the minimum amount of time to delay between retries. If unset,
// NatGatewayAvailableWaiter will use default minimum delay of 15 seconds. Note
// that MinDelay must resolve to a value lesser than or equal to the MaxDelay.
MinDelay time.Duration
// MaxDelay is the maximum amount of time to delay between retries. If unset or set
// to zero, NatGatewayAvailableWaiter will use default max delay of 120 seconds.
// Note that MaxDelay must resolve to value greater than or equal to the MinDelay.
MaxDelay time.Duration
// LogWaitAttempts is used to enable logging for waiter retry attempts
LogWaitAttempts bool
// Retryable is function that can be used to override the service defined
// waiter-behavior based on operation output, or returned error. This function is
// used by the waiter to decide if a state is retryable or a terminal state. By
// default service-modeled logic will populate this option. This option can thus be
// used to define a custom waiter state with fall-back to service-modeled waiter
// state mutators.The function returns an error in case of a failure state. In case
// of retry state, this function returns a bool value of true and nil error, while
// in case of success it returns a bool value of false and nil error.
Retryable func(context.Context, *DescribeNatGatewaysInput, *DescribeNatGatewaysOutput, error) (bool, error)
}
// NatGatewayAvailableWaiter defines the waiters for NatGatewayAvailable
type NatGatewayAvailableWaiter struct {
client DescribeNatGatewaysAPIClient
options NatGatewayAvailableWaiterOptions
}
// NewNatGatewayAvailableWaiter constructs a NatGatewayAvailableWaiter.
func NewNatGatewayAvailableWaiter(client DescribeNatGatewaysAPIClient, optFns ...func(*NatGatewayAvailableWaiterOptions)) *NatGatewayAvailableWaiter {
options := NatGatewayAvailableWaiterOptions{}
options.MinDelay = 15 * time.Second
options.MaxDelay = 120 * time.Second
options.Retryable = natGatewayAvailableStateRetryable
for _, fn := range optFns {
fn(&options)
}
return &NatGatewayAvailableWaiter{
client: client,
options: options,
}
}
// Wait calls the waiter function for NatGatewayAvailable waiter. The maxWaitDur is
// the maximum wait duration the waiter will wait. The maxWaitDur is required and
// must be greater than zero.
func (w *NatGatewayAvailableWaiter) Wait(ctx context.Context, params *DescribeNatGatewaysInput, maxWaitDur time.Duration, optFns ...func(*NatGatewayAvailableWaiterOptions)) error {
_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
return err
}
// WaitForOutput calls the waiter function for NatGatewayAvailable waiter and
// returns the output of the successful operation. The maxWaitDur is the maximum
// wait duration the waiter will wait. The maxWaitDur is required and must be
// greater than zero.
func (w *NatGatewayAvailableWaiter) WaitForOutput(ctx context.Context, params *DescribeNatGatewaysInput, maxWaitDur time.Duration, optFns ...func(*NatGatewayAvailableWaiterOptions)) (*DescribeNatGatewaysOutput, error) {
if maxWaitDur <= 0 {
return nil, fmt.Errorf("maximum wait time for waiter must be greater than zero")
}
options := w.options
for _, fn := range optFns {
fn(&options)
}
if options.MaxDelay <= 0 {
options.MaxDelay = 120 * time.Second
}
if options.MinDelay > options.MaxDelay {
return nil, fmt.Errorf("minimum waiter delay %v must be lesser than or equal to maximum waiter delay of %v.", options.MinDelay, options.MaxDelay)
}
ctx, cancelFn := context.WithTimeout(ctx, maxWaitDur)
defer cancelFn()
logger := smithywaiter.Logger{}
remainingTime := maxWaitDur
var attempt int64
for {
attempt++
apiOptions := options.APIOptions
start := time.Now()
if options.LogWaitAttempts {
logger.Attempt = attempt
apiOptions = append([]func(*middleware.Stack) error{}, options.APIOptions...)
apiOptions = append(apiOptions, logger.AddLogger)
}
out, err := w.client.DescribeNatGateways(ctx, params, func(o *Options) {
o.APIOptions = append(o.APIOptions, apiOptions...)
})
retryable, err := options.Retryable(ctx, params, out, err)
if err != nil {
return nil, err
}
if !retryable {
return out, nil
}
remainingTime -= time.Since(start)
if remainingTime < options.MinDelay || remainingTime <= 0 {
break
}
// compute exponential backoff between waiter retries
delay, err := smithywaiter.ComputeDelay(
attempt, options.MinDelay, options.MaxDelay, remainingTime,
)
if err != nil {
return nil, fmt.Errorf("error computing waiter delay, %w", err)
}
remainingTime -= delay
// sleep for the delay amount before invoking a request
if err := smithytime.SleepWithContext(ctx, delay); err != nil {
return nil, fmt.Errorf("request cancelled while waiting, %w", err)
}
}
return nil, fmt.Errorf("exceeded max wait time for NatGatewayAvailable waiter")
}
func natGatewayAvailableStateRetryable(ctx context.Context, input *DescribeNatGatewaysInput, output *DescribeNatGatewaysOutput, err error) (bool, error) {
if err == nil {
pathValue, err := jmespath.Search("NatGateways[].State", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "available"
var match = true
listOfValues, ok := pathValue.([]interface{})
if !ok {
return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
}
if len(listOfValues) == 0 {
match = false
}
for _, v := range listOfValues {
value, ok := v.(types.NatGatewayState)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.NatGatewayState value, got %T", pathValue)
}
if string(value) != expectedValue {
match = false
}
}
if match {
return false, nil
}
}
if err == nil {
pathValue, err := jmespath.Search("NatGateways[].State", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "failed"
listOfValues, ok := pathValue.([]interface{})
if !ok {
return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
}
for _, v := range listOfValues {
value, ok := v.(types.NatGatewayState)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.NatGatewayState value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
}
if err == nil {
pathValue, err := jmespath.Search("NatGateways[].State", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "deleting"
listOfValues, ok := pathValue.([]interface{})
if !ok {
return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
}
for _, v := range listOfValues {
value, ok := v.(types.NatGatewayState)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.NatGatewayState value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
}
if err == nil {
pathValue, err := jmespath.Search("NatGateways[].State", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "deleted"
listOfValues, ok := pathValue.([]interface{})
if !ok {
return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
}
for _, v := range listOfValues {
value, ok := v.(types.NatGatewayState)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.NatGatewayState value, got %T", pathValue)
}
if string(value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
}
if err != nil {
var apiErr smithy.APIError
ok := errors.As(err, &apiErr)
if !ok {
return false, fmt.Errorf("expected err to be of type smithy.APIError, got %w", err)
}
if "NatGatewayNotFound" == apiErr.ErrorCode() {
return true, nil
}
}
return true, nil
}
// NatGatewayDeletedWaiterOptions are waiter options for NatGatewayDeletedWaiter
type NatGatewayDeletedWaiterOptions struct {
// Set of options to modify how an operation is invoked. These apply to all
// operations invoked for this client. Use functional options on operation call to
// modify this list for per operation behavior.
APIOptions []func(*middleware.Stack) error
// MinDelay is the minimum amount of time to delay between retries. If unset,
// NatGatewayDeletedWaiter will use default minimum delay of 15 seconds. Note that
// MinDelay must resolve to a value lesser than or equal to the MaxDelay.
MinDelay time.Duration
// MaxDelay is the maximum amount of time to delay between retries. If unset or set
// to zero, NatGatewayDeletedWaiter will use default max delay of 120 seconds. Note
// that MaxDelay must resolve to value greater than or equal to the MinDelay.
MaxDelay time.Duration
// LogWaitAttempts is used to enable logging for waiter retry attempts
LogWaitAttempts bool
// Retryable is function that can be used to override the service defined
// waiter-behavior based on operation output, or returned error. This function is
// used by the waiter to decide if a state is retryable or a terminal state. By
// default service-modeled logic will populate this option. This option can thus be
// used to define a custom waiter state with fall-back to service-modeled waiter
// state mutators.The function returns an error in case of a failure state. In case
// of retry state, this function returns a bool value of true and nil error, while
// in case of success it returns a bool value of false and nil error.
Retryable func(context.Context, *DescribeNatGatewaysInput, *DescribeNatGatewaysOutput, error) (bool, error)
}
// NatGatewayDeletedWaiter defines the waiters for NatGatewayDeleted
type NatGatewayDeletedWaiter struct {
client DescribeNatGatewaysAPIClient
options NatGatewayDeletedWaiterOptions
}
// NewNatGatewayDeletedWaiter constructs a NatGatewayDeletedWaiter.
func NewNatGatewayDeletedWaiter(client DescribeNatGatewaysAPIClient, optFns ...func(*NatGatewayDeletedWaiterOptions)) *NatGatewayDeletedWaiter {
options := NatGatewayDeletedWaiterOptions{}
options.MinDelay = 15 * time.Second
options.MaxDelay = 120 * time.Second
options.Retryable = natGatewayDeletedStateRetryable
for _, fn := range optFns {
fn(&options)
}
return &NatGatewayDeletedWaiter{
client: client,
options: options,
}
}
// Wait calls the waiter function for NatGatewayDeleted waiter. The maxWaitDur is
// the maximum wait duration the waiter will wait. The maxWaitDur is required and
// must be greater than zero.
func (w *NatGatewayDeletedWaiter) Wait(ctx context.Context, params *DescribeNatGatewaysInput, maxWaitDur time.Duration, optFns ...func(*NatGatewayDeletedWaiterOptions)) error {
_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
return err
}
// WaitForOutput calls the waiter function for NatGatewayDeleted waiter and returns
// the output of the successful operation. The maxWaitDur is the maximum wait
// duration the waiter will wait. The maxWaitDur is required and must be greater
// than zero.
func (w *NatGatewayDeletedWaiter) WaitForOutput(ctx context.Context, params *DescribeNatGatewaysInput, maxWaitDur time.Duration, optFns ...func(*NatGatewayDeletedWaiterOptions)) (*DescribeNatGatewaysOutput, error) {
if maxWaitDur <= 0 {
return nil, fmt.Errorf("maximum wait time for waiter must be greater than zero")
}
options := w.options
for _, fn := range optFns {
fn(&options)
}
if options.MaxDelay <= 0 {
options.MaxDelay = 120 * time.Second
}
if options.MinDelay > options.MaxDelay {
return nil, fmt.Errorf("minimum waiter delay %v must be lesser than or equal to maximum waiter delay of %v.", options.MinDelay, options.MaxDelay)
}
ctx, cancelFn := context.WithTimeout(ctx, maxWaitDur)
defer cancelFn()
logger := smithywaiter.Logger{}
remainingTime := maxWaitDur
var attempt int64
for {
attempt++
apiOptions := options.APIOptions
start := time.Now()
if options.LogWaitAttempts {
logger.Attempt = attempt
apiOptions = append([]func(*middleware.Stack) error{}, options.APIOptions...)
apiOptions = append(apiOptions, logger.AddLogger)
}
out, err := w.client.DescribeNatGateways(ctx, params, func(o *Options) {
o.APIOptions = append(o.APIOptions, apiOptions...)
})
retryable, err := options.Retryable(ctx, params, out, err)
if err != nil {
return nil, err
}
if !retryable {
return out, nil
}
remainingTime -= time.Since(start)
if remainingTime < options.MinDelay || remainingTime <= 0 {
break
}
// compute exponential backoff between waiter retries
delay, err := smithywaiter.ComputeDelay(
attempt, options.MinDelay, options.MaxDelay, remainingTime,
)
if err != nil {
return nil, fmt.Errorf("error computing waiter delay, %w", err)
}
remainingTime -= delay
// sleep for the delay amount before invoking a request
if err := smithytime.SleepWithContext(ctx, delay); err != nil {
return nil, fmt.Errorf("request cancelled while waiting, %w", err)
}
}
return nil, fmt.Errorf("exceeded max wait time for NatGatewayDeleted waiter")
}
func natGatewayDeletedStateRetryable(ctx context.Context, input *DescribeNatGatewaysInput, output *DescribeNatGatewaysOutput, err error) (bool, error) {
if err == nil {
pathValue, err := jmespath.Search("NatGateways[].State", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "deleted"
var match = true
listOfValues, ok := pathValue.([]interface{})
if !ok {
return false, fmt.Errorf("waiter comparator expected list got %T", pathValue)
}
if len(listOfValues) == 0 {
match = false
}
for _, v := range listOfValues {
value, ok := v.(types.NatGatewayState)
if !ok {
return false, fmt.Errorf("waiter comparator expected types.NatGatewayState value, got %T", pathValue)
}
if string(value) != expectedValue {
match = false
}
}
if match {
return false, nil
}
}
if err != nil {
var apiErr smithy.APIError
ok := errors.As(err, &apiErr)
if !ok {
return false, fmt.Errorf("expected err to be of type smithy.APIError, got %w", err)
}
if "NatGatewayNotFound" == apiErr.ErrorCode() {
return false, nil
}
}
return true, nil
}
func newServiceMetadataMiddleware_opDescribeNatGateways(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
SigningName: "ec2",
OperationName: "DescribeNatGateways",
}
}