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api_op_DescribeConnections.go
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api_op_DescribeConnections.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package databasemigrationservice
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/databasemigrationservice/types"
"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 the status of the connections that have been made between the
// replication instance and an endpoint. Connections are created when you test an
// endpoint.
func (c *Client) DescribeConnections(ctx context.Context, params *DescribeConnectionsInput, optFns ...func(*Options)) (*DescribeConnectionsOutput, error) {
if params == nil {
params = &DescribeConnectionsInput{}
}
result, metadata, err := c.invokeOperation(ctx, "DescribeConnections", params, optFns, c.addOperationDescribeConnectionsMiddlewares)
if err != nil {
return nil, err
}
out := result.(*DescribeConnectionsOutput)
out.ResultMetadata = metadata
return out, nil
}
type DescribeConnectionsInput struct {
// The filters applied to the connection. Valid filter names: endpoint-arn |
// replication-instance-arn
Filters []types.Filter
// An optional pagination token provided by a previous request. If this parameter
// is specified, the response includes only records beyond the marker, up to the
// value specified by MaxRecords.
Marker *string
// The maximum number of records to include in the response. If more records exist
// than the specified MaxRecords value, a pagination token called a marker is
// included in the response so that the remaining results can be retrieved.
// Default: 100 Constraints: Minimum 20, maximum 100.
MaxRecords *int32
noSmithyDocumentSerde
}
type DescribeConnectionsOutput struct {
// A description of the connections.
Connections []types.Connection
// An optional pagination token provided by a previous request. If this parameter
// is specified, the response includes only records beyond the marker, up to the
// value specified by MaxRecords.
Marker *string
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationDescribeConnectionsMiddlewares(stack *middleware.Stack, options Options) (err error) {
err = stack.Serialize.Add(&awsAwsjson11_serializeOpDescribeConnections{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsAwsjson11_deserializeOpDescribeConnections{}, 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 = addOpDescribeConnectionsValidationMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opDescribeConnections(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
}
// DescribeConnectionsAPIClient is a client that implements the DescribeConnections
// operation.
type DescribeConnectionsAPIClient interface {
DescribeConnections(context.Context, *DescribeConnectionsInput, ...func(*Options)) (*DescribeConnectionsOutput, error)
}
var _ DescribeConnectionsAPIClient = (*Client)(nil)
// DescribeConnectionsPaginatorOptions is the paginator options for
// DescribeConnections
type DescribeConnectionsPaginatorOptions struct {
// The maximum number of records to include in the response. If more records exist
// than the specified MaxRecords value, a pagination token called a marker is
// included in the response so that the remaining results can be retrieved.
// Default: 100 Constraints: Minimum 20, maximum 100.
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
}
// DescribeConnectionsPaginator is a paginator for DescribeConnections
type DescribeConnectionsPaginator struct {
options DescribeConnectionsPaginatorOptions
client DescribeConnectionsAPIClient
params *DescribeConnectionsInput
nextToken *string
firstPage bool
}
// NewDescribeConnectionsPaginator returns a new DescribeConnectionsPaginator
func NewDescribeConnectionsPaginator(client DescribeConnectionsAPIClient, params *DescribeConnectionsInput, optFns ...func(*DescribeConnectionsPaginatorOptions)) *DescribeConnectionsPaginator {
if params == nil {
params = &DescribeConnectionsInput{}
}
options := DescribeConnectionsPaginatorOptions{}
if params.MaxRecords != nil {
options.Limit = *params.MaxRecords
}
for _, fn := range optFns {
fn(&options)
}
return &DescribeConnectionsPaginator{
options: options,
client: client,
params: params,
firstPage: true,
nextToken: params.Marker,
}
}
// HasMorePages returns a boolean indicating whether more pages are available
func (p *DescribeConnectionsPaginator) HasMorePages() bool {
return p.firstPage || (p.nextToken != nil && len(*p.nextToken) != 0)
}
// NextPage retrieves the next DescribeConnections page.
func (p *DescribeConnectionsPaginator) NextPage(ctx context.Context, optFns ...func(*Options)) (*DescribeConnectionsOutput, error) {
if !p.HasMorePages() {
return nil, fmt.Errorf("no more pages available")
}
params := *p.params
params.Marker = p.nextToken
var limit *int32
if p.options.Limit > 0 {
limit = &p.options.Limit
}
params.MaxRecords = limit
result, err := p.client.DescribeConnections(ctx, ¶ms, optFns...)
if err != nil {
return nil, err
}
p.firstPage = false
prevToken := p.nextToken
p.nextToken = result.Marker
if p.options.StopOnDuplicateToken &&
prevToken != nil &&
p.nextToken != nil &&
*prevToken == *p.nextToken {
p.nextToken = nil
}
return result, nil
}
// TestConnectionSucceedsWaiterOptions are waiter options for
// TestConnectionSucceedsWaiter
type TestConnectionSucceedsWaiterOptions 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,
// TestConnectionSucceedsWaiter 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, TestConnectionSucceedsWaiter 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, *DescribeConnectionsInput, *DescribeConnectionsOutput, error) (bool, error)
}
// TestConnectionSucceedsWaiter defines the waiters for TestConnectionSucceeds
type TestConnectionSucceedsWaiter struct {
client DescribeConnectionsAPIClient
options TestConnectionSucceedsWaiterOptions
}
// NewTestConnectionSucceedsWaiter constructs a TestConnectionSucceedsWaiter.
func NewTestConnectionSucceedsWaiter(client DescribeConnectionsAPIClient, optFns ...func(*TestConnectionSucceedsWaiterOptions)) *TestConnectionSucceedsWaiter {
options := TestConnectionSucceedsWaiterOptions{}
options.MinDelay = 5 * time.Second
options.MaxDelay = 120 * time.Second
options.Retryable = testConnectionSucceedsStateRetryable
for _, fn := range optFns {
fn(&options)
}
return &TestConnectionSucceedsWaiter{
client: client,
options: options,
}
}
// Wait calls the waiter function for TestConnectionSucceeds waiter. The maxWaitDur
// is the maximum wait duration the waiter will wait. The maxWaitDur is required
// and must be greater than zero.
func (w *TestConnectionSucceedsWaiter) Wait(ctx context.Context, params *DescribeConnectionsInput, maxWaitDur time.Duration, optFns ...func(*TestConnectionSucceedsWaiterOptions)) error {
_, err := w.WaitForOutput(ctx, params, maxWaitDur, optFns...)
return err
}
// WaitForOutput calls the waiter function for TestConnectionSucceeds 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 *TestConnectionSucceedsWaiter) WaitForOutput(ctx context.Context, params *DescribeConnectionsInput, maxWaitDur time.Duration, optFns ...func(*TestConnectionSucceedsWaiterOptions)) (*DescribeConnectionsOutput, 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.DescribeConnections(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 TestConnectionSucceeds waiter")
}
func testConnectionSucceedsStateRetryable(ctx context.Context, input *DescribeConnectionsInput, output *DescribeConnectionsOutput, err error) (bool, error) {
if err == nil {
pathValue, err := jmespath.Search("Connections[].Status", output)
if err != nil {
return false, fmt.Errorf("error evaluating waiter state: %w", err)
}
expectedValue := "successful"
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.(*string)
if !ok {
return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue)
}
if string(*value) != expectedValue {
match = false
}
}
if match {
return false, nil
}
}
if err == nil {
pathValue, err := jmespath.Search("Connections[].Status", 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.(*string)
if !ok {
return false, fmt.Errorf("waiter comparator expected *string value, got %T", pathValue)
}
if string(*value) == expectedValue {
return false, fmt.Errorf("waiter state transitioned to Failure")
}
}
}
return true, nil
}
func newServiceMetadataMiddleware_opDescribeConnections(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
SigningName: "dms",
OperationName: "DescribeConnections",
}
}