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api_op_DescribeInternetGateways.go
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api_op_DescribeInternetGateways.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"
"strconv"
"time"
)
// Describes one or more of your internet gateways.
func (c *Client) DescribeInternetGateways(ctx context.Context, params *DescribeInternetGatewaysInput, optFns ...func(*Options)) (*DescribeInternetGatewaysOutput, error) {
if params == nil {
params = &DescribeInternetGatewaysInput{}
}
result, metadata, err := c.invokeOperation(ctx, "DescribeInternetGateways", params, optFns, c.addOperationDescribeInternetGatewaysMiddlewares)
if err != nil {
return nil, err
}
out := result.(*DescribeInternetGatewaysOutput)
out.ResultMetadata = metadata
return out, nil
}
type DescribeInternetGatewaysInput 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
// The filters.
// - attachment.state - The current state of the attachment between the gateway
// and the VPC ( available ). Present only if a VPC is attached.
// - attachment.vpc-id - The ID of an attached VPC.
// - internet-gateway-id - The ID of the Internet gateway.
// - owner-id - The ID of the Amazon Web Services account that owns the internet
// gateway.
// - 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.
Filters []types.Filter
// The IDs of the internet gateways. Default: Describes all your internet gateways.
InternetGatewayIds []string
// The maximum number of items to return for this request. To get the next page of
// items, make another request with the token returned in the output. For more
// information, see Pagination (https://docs.aws.amazon.com/AWSEC2/latest/APIReference/Query-Requests.html#api-pagination)
// .
MaxResults *int32
// The token returned from a previous paginated request. Pagination continues from
// the end of the items returned by the previous request.
NextToken *string
noSmithyDocumentSerde
}
type DescribeInternetGatewaysOutput struct {
// Information about one or more internet gateways.
InternetGateways []types.InternetGateway
// The token to include in another request to get the next page of items. This
// value is null when there are no more items to return.
NextToken *string
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationDescribeInternetGatewaysMiddlewares(stack *middleware.Stack, options Options) (err error) {
if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
return err
}
err = stack.Serialize.Add(&awsEc2query_serializeOpDescribeInternetGateways{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsEc2query_deserializeOpDescribeInternetGateways{}, middleware.After)
if err != nil {
return err
}
if err := addProtocolFinalizerMiddlewares(stack, options, "DescribeInternetGateways"); 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_opDescribeInternetGateways(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
}
// DescribeInternetGatewaysAPIClient is a client that implements the
// DescribeInternetGateways operation.
type DescribeInternetGatewaysAPIClient interface {
DescribeInternetGateways(context.Context, *DescribeInternetGatewaysInput, ...func(*Options)) (*DescribeInternetGatewaysOutput, error)
}
var _ DescribeInternetGatewaysAPIClient = (*Client)(nil)
// DescribeInternetGatewaysPaginatorOptions is the paginator options for
// DescribeInternetGateways
type DescribeInternetGatewaysPaginatorOptions struct {
// The maximum number of items to return for this request. To get the next page of
// items, make another request with the token returned in the output. For more
// information, see Pagination (https://docs.aws.amazon.com/AWSEC2/latest/APIReference/Query-Requests.html#api-pagination)
// .
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
}
// DescribeInternetGatewaysPaginator is a paginator for DescribeInternetGateways
type DescribeInternetGatewaysPaginator struct {
options DescribeInternetGatewaysPaginatorOptions
client DescribeInternetGatewaysAPIClient
params *DescribeInternetGatewaysInput
nextToken *string
firstPage bool
}
// NewDescribeInternetGatewaysPaginator returns a new
// DescribeInternetGatewaysPaginator
func NewDescribeInternetGatewaysPaginator(client DescribeInternetGatewaysAPIClient, params *DescribeInternetGatewaysInput, optFns ...func(*DescribeInternetGatewaysPaginatorOptions)) *DescribeInternetGatewaysPaginator {
if params == nil {
params = &DescribeInternetGatewaysInput{}
}
options := DescribeInternetGatewaysPaginatorOptions{}
if params.MaxResults != nil {
options.Limit = *params.MaxResults
}
for _, fn := range optFns {
fn(&options)
}
return &DescribeInternetGatewaysPaginator{
options: options,
client: client,
params: params,
firstPage: true,
nextToken: params.NextToken,
}
}
// HasMorePages returns a boolean indicating whether more pages are available
func (p *DescribeInternetGatewaysPaginator) HasMorePages() bool {
return p.firstPage || (p.nextToken != nil && len(*p.nextToken) != 0)
}
// NextPage retrieves the next DescribeInternetGateways page.
func (p *DescribeInternetGatewaysPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*DescribeInternetGatewaysOutput, 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.DescribeInternetGateways(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
}
// InternetGatewayExistsWaiterOptions are waiter options for
// InternetGatewayExistsWaiter
type InternetGatewayExistsWaiterOptions 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,
// InternetGatewayExistsWaiter will use default minimum delay of 5 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, InternetGatewayExistsWaiter 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, *DescribeInternetGatewaysInput, *DescribeInternetGatewaysOutput, error) (bool, error)
}
// InternetGatewayExistsWaiter defines the waiters for InternetGatewayExists
type InternetGatewayExistsWaiter struct {
client DescribeInternetGatewaysAPIClient
options InternetGatewayExistsWaiterOptions
}
// NewInternetGatewayExistsWaiter constructs a InternetGatewayExistsWaiter.
func NewInternetGatewayExistsWaiter(client DescribeInternetGatewaysAPIClient, optFns ...func(*InternetGatewayExistsWaiterOptions)) *InternetGatewayExistsWaiter {
options := InternetGatewayExistsWaiterOptions{}
options.MinDelay = 5 * time.Second
options.MaxDelay = 120 * time.Second
options.Retryable = internetGatewayExistsStateRetryable
for _, fn := range optFns {
fn(&options)
}
return &InternetGatewayExistsWaiter{
client: client,
options: options,
}
}
// Wait calls the waiter function for InternetGatewayExists waiter. The maxWaitDur
// is the maximum wait duration the waiter will wait. The maxWaitDur is required
// and must be greater than zero.
func (w *InternetGatewayExistsWaiter) Wait(ctx context.Context, params *DescribeInternetGatewaysInput, maxWaitDur time.Duration, optFns ...func(*InternetGatewayExistsWaiterOptions)) error {
_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
return err
}
// WaitForOutput calls the waiter function for InternetGatewayExists 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 *InternetGatewayExistsWaiter) WaitForOutput(ctx context.Context, params *DescribeInternetGatewaysInput, maxWaitDur time.Duration, optFns ...func(*InternetGatewayExistsWaiterOptions)) (*DescribeInternetGatewaysOutput, 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.DescribeInternetGateways(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 InternetGatewayExists waiter")
}
func internetGatewayExistsStateRetryable(ctx context.Context, input *DescribeInternetGatewaysInput, output *DescribeInternetGatewaysOutput, err error) (bool, error) {
if err == nil {
pathValue, err := jmespath.Search("length(InternetGateways[].InternetGatewayId) > `0`", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "true"
bv, err := strconv.ParseBool(expectedValue)
if err != nil {
return false, fmt.Errorf("error parsing boolean from string %w", err)
}
value, ok := pathValue.(bool)
if !ok {
return false, fmt.Errorf("waiter comparator expected bool value got %T", pathValue)
}
if value == bv {
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 "InvalidInternetGateway.NotFound" == apiErr.ErrorCode() {
return true, nil
}
}
return true, nil
}
func newServiceMetadataMiddleware_opDescribeInternetGateways(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
OperationName: "DescribeInternetGateways",
}
}