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share/vendor/github.com/aws/aws-sdk-go/private/model/api/operation.go
Knut Ahlers c043e58efb
Update vendored dependencies
Signed-off-by: Knut Ahlers <knut@ahlers.me>
2017-12-29 23:41:14 +01:00

492 lines
15 KiB
Go

// +build codegen
package api
import (
"bytes"
"fmt"
"regexp"
"sort"
"strings"
"text/template"
)
// An Operation defines a specific API Operation.
type Operation struct {
API *API `json:"-"`
ExportedName string
Name string
Documentation string
HTTP HTTPInfo
InputRef ShapeRef `json:"input"`
OutputRef ShapeRef `json:"output"`
ErrorRefs []ShapeRef `json:"errors"`
Paginator *Paginator
Deprecated bool `json:"deprecated"`
AuthType string `json:"authtype"`
imports map[string]bool
}
// A HTTPInfo defines the method of HTTP request for the Operation.
type HTTPInfo struct {
Method string
RequestURI string
ResponseCode uint
}
// HasInput returns if the Operation accepts an input paramater
func (o *Operation) HasInput() bool {
return o.InputRef.ShapeName != ""
}
// HasOutput returns if the Operation accepts an output parameter
func (o *Operation) HasOutput() bool {
return o.OutputRef.ShapeName != ""
}
func (o *Operation) GetSigner() string {
if o.AuthType == "v4-unsigned-body" {
o.API.imports["github.com/aws/aws-sdk-go/aws/signer/v4"] = true
}
buf := bytes.NewBuffer(nil)
switch o.AuthType {
case "none":
buf.WriteString("req.Config.Credentials = credentials.AnonymousCredentials")
case "v4-unsigned-body":
buf.WriteString("req.Handlers.Sign.Remove(v4.SignRequestHandler)\n")
buf.WriteString("handler := v4.BuildNamedHandler(\"v4.CustomSignerHandler\", v4.WithUnsignedPayload)\n")
buf.WriteString("req.Handlers.Sign.PushFrontNamed(handler)")
}
buf.WriteString("\n")
return buf.String()
}
// tplOperation defines a template for rendering an API Operation
var tplOperation = template.Must(template.New("operation").Funcs(template.FuncMap{
"GetCrosslinkURL": GetCrosslinkURL,
}).Parse(`
const op{{ .ExportedName }} = "{{ .Name }}"
// {{ .ExportedName }}Request generates a "aws/request.Request" representing the
// client's request for the {{ .ExportedName }} operation. The "output" return
// value will be populated with the request's response once the request complets
// successfuly.
//
// Use "Send" method on the returned Request to send the API call to the service.
// the "output" return value is not valid until after Send returns without error.
//
// See {{ .ExportedName }} for more information on using the {{ .ExportedName }}
// API call, and error handling.
//
// This method is useful when you want to inject custom logic or configuration
// into the SDK's request lifecycle. Such as custom headers, or retry logic.
//
//
// // Example sending a request using the {{ .ExportedName }}Request method.
// req, resp := client.{{ .ExportedName }}Request(params)
//
// err := req.Send()
// if err == nil { // resp is now filled
// fmt.Println(resp)
// }
{{ $crosslinkURL := GetCrosslinkURL $.API.BaseCrosslinkURL $.API.Metadata.UID $.ExportedName -}}
{{ if ne $crosslinkURL "" -}}
//
// See also, {{ $crosslinkURL }}
{{ end -}}
func (c *{{ .API.StructName }}) {{ .ExportedName }}Request(` +
`input {{ .InputRef.GoType }}) (req *request.Request, output {{ .OutputRef.GoType }}) {
{{ if (or .Deprecated (or .InputRef.Deprecated .OutputRef.Deprecated)) }}if c.Client.Config.Logger != nil {
c.Client.Config.Logger.Log("This operation, {{ .ExportedName }}, has been deprecated")
}
op := &request.Operation{ {{ else }} op := &request.Operation{ {{ end }}
Name: op{{ .ExportedName }},
{{ if ne .HTTP.Method "" }}HTTPMethod: "{{ .HTTP.Method }}",
{{ end }}HTTPPath: {{ if ne .HTTP.RequestURI "" }}"{{ .HTTP.RequestURI }}"{{ else }}"/"{{ end }},
{{ if .Paginator }}Paginator: &request.Paginator{
InputTokens: {{ .Paginator.InputTokensString }},
OutputTokens: {{ .Paginator.OutputTokensString }},
LimitToken: "{{ .Paginator.LimitKey }}",
TruncationToken: "{{ .Paginator.MoreResults }}",
},
{{ end }}
}
if input == nil {
input = &{{ .InputRef.GoTypeElem }}{}
}
output = &{{ .OutputRef.GoTypeElem }}{}
req = c.newRequest(op, input, output){{ if eq .OutputRef.Shape.Placeholder true }}
req.Handlers.Unmarshal.Remove({{ .API.ProtocolPackage }}.UnmarshalHandler)
req.Handlers.Unmarshal.PushBackNamed(protocol.UnmarshalDiscardBodyHandler){{ end }}
{{ if ne .AuthType "" }}{{ .GetSigner }}{{ end -}}
return
}
// {{ .ExportedName }} API operation for {{ .API.Metadata.ServiceFullName }}.
{{ if .Documentation -}}
//
{{ .Documentation }}
{{ end -}}
//
// Returns awserr.Error for service API and SDK errors. Use runtime type assertions
// with awserr.Error's Code and Message methods to get detailed information about
// the error.
//
// See the AWS API reference guide for {{ .API.Metadata.ServiceFullName }}'s
// API operation {{ .ExportedName }} for usage and error information.
{{ if .ErrorRefs -}}
//
// Returned Error Codes:
{{ range $_, $err := .ErrorRefs -}}
// * {{ $err.Shape.ErrorCodeName }} "{{ $err.Shape.ErrorName}}"
{{ if $err.Docstring -}}
{{ $err.IndentedDocstring }}
{{ end -}}
//
{{ end -}}
{{ end -}}
{{ $crosslinkURL := GetCrosslinkURL $.API.BaseCrosslinkURL $.API.Metadata.UID $.ExportedName -}}
{{ if ne $crosslinkURL "" -}}
// See also, {{ $crosslinkURL }}
{{ end -}}
func (c *{{ .API.StructName }}) {{ .ExportedName }}(` +
`input {{ .InputRef.GoType }}) ({{ .OutputRef.GoType }}, error) {
req, out := c.{{ .ExportedName }}Request(input)
return out, req.Send()
}
// {{ .ExportedName }}WithContext is the same as {{ .ExportedName }} with the addition of
// the ability to pass a context and additional request options.
//
// See {{ .ExportedName }} for details on how to use this API operation.
//
// The context must be non-nil and will be used for request cancellation. If
// the context is nil a panic will occur. In the future the SDK may create
// sub-contexts for http.Requests. See https://golang.org/pkg/context/
// for more information on using Contexts.
func (c *{{ .API.StructName }}) {{ .ExportedName }}WithContext(` +
`ctx aws.Context, input {{ .InputRef.GoType }}, opts ...request.Option) ` +
`({{ .OutputRef.GoType }}, error) {
req, out := c.{{ .ExportedName }}Request(input)
req.SetContext(ctx)
req.ApplyOptions(opts...)
return out, req.Send()
}
{{ if .Paginator }}
// {{ .ExportedName }}Pages iterates over the pages of a {{ .ExportedName }} operation,
// calling the "fn" function with the response data for each page. To stop
// iterating, return false from the fn function.
//
// See {{ .ExportedName }} method for more information on how to use this operation.
//
// Note: This operation can generate multiple requests to a service.
//
// // Example iterating over at most 3 pages of a {{ .ExportedName }} operation.
// pageNum := 0
// err := client.{{ .ExportedName }}Pages(params,
// func(page {{ .OutputRef.GoType }}, lastPage bool) bool {
// pageNum++
// fmt.Println(page)
// return pageNum <= 3
// })
//
func (c *{{ .API.StructName }}) {{ .ExportedName }}Pages(` +
`input {{ .InputRef.GoType }}, fn func({{ .OutputRef.GoType }}, bool) bool) error {
return c.{{ .ExportedName }}PagesWithContext(aws.BackgroundContext(), input, fn)
}
// {{ .ExportedName }}PagesWithContext same as {{ .ExportedName }}Pages except
// it takes a Context and allows setting request options on the pages.
//
// The context must be non-nil and will be used for request cancellation. If
// the context is nil a panic will occur. In the future the SDK may create
// sub-contexts for http.Requests. See https://golang.org/pkg/context/
// for more information on using Contexts.
func (c *{{ .API.StructName }}) {{ .ExportedName }}PagesWithContext(` +
`ctx aws.Context, ` +
`input {{ .InputRef.GoType }}, ` +
`fn func({{ .OutputRef.GoType }}, bool) bool, ` +
`opts ...request.Option) error {
p := request.Pagination {
NewRequest: func() (*request.Request, error) {
var inCpy {{ .InputRef.GoType }}
if input != nil {
tmp := *input
inCpy = &tmp
}
req, _ := c.{{ .ExportedName }}Request(inCpy)
req.SetContext(ctx)
req.ApplyOptions(opts...)
return req, nil
},
}
cont := true
for p.Next() && cont {
cont = fn(p.Page().({{ .OutputRef.GoType }}), !p.HasNextPage())
}
return p.Err()
}
{{ end }}
`))
// GoCode returns a string of rendered GoCode for this Operation
func (o *Operation) GoCode() string {
var buf bytes.Buffer
err := tplOperation.Execute(&buf, o)
if err != nil {
panic(err)
}
return strings.TrimSpace(buf.String())
}
// tplInfSig defines the template for rendering an Operation's signature within an Interface definition.
var tplInfSig = template.Must(template.New("opsig").Parse(`
{{ .ExportedName }}({{ .InputRef.GoTypeWithPkgName }}) ({{ .OutputRef.GoTypeWithPkgName }}, error)
{{ .ExportedName }}WithContext(aws.Context, {{ .InputRef.GoTypeWithPkgName }}, ...request.Option) ({{ .OutputRef.GoTypeWithPkgName }}, error)
{{ .ExportedName }}Request({{ .InputRef.GoTypeWithPkgName }}) (*request.Request, {{ .OutputRef.GoTypeWithPkgName }})
{{ if .Paginator -}}
{{ .ExportedName }}Pages({{ .InputRef.GoTypeWithPkgName }}, func({{ .OutputRef.GoTypeWithPkgName }}, bool) bool) error
{{ .ExportedName }}PagesWithContext(aws.Context, {{ .InputRef.GoTypeWithPkgName }}, func({{ .OutputRef.GoTypeWithPkgName }}, bool) bool, ...request.Option) error
{{- end }}
`))
// InterfaceSignature returns a string representing the Operation's interface{}
// functional signature.
func (o *Operation) InterfaceSignature() string {
var buf bytes.Buffer
err := tplInfSig.Execute(&buf, o)
if err != nil {
panic(err)
}
return strings.TrimSpace(buf.String())
}
// tplExample defines the template for rendering an Operation example
var tplExample = template.Must(template.New("operationExample").Parse(`
func Example{{ .API.StructName }}_{{ .ExportedName }}() {
sess := session.Must(session.NewSession())
svc := {{ .API.PackageName }}.New(sess)
{{ .ExampleInput }}
resp, err := svc.{{ .ExportedName }}(params)
if err != nil {
// Print the error, cast err to awserr.Error to get the Code and
// Message from an error.
fmt.Println(err.Error())
return
}
// Pretty-print the response data.
fmt.Println(resp)
}
`))
// Example returns a string of the rendered Go code for the Operation
func (o *Operation) Example() string {
var buf bytes.Buffer
err := tplExample.Execute(&buf, o)
if err != nil {
panic(err)
}
return strings.TrimSpace(buf.String())
}
// ExampleInput return a string of the rendered Go code for an example's input parameters
func (o *Operation) ExampleInput() string {
if len(o.InputRef.Shape.MemberRefs) == 0 {
if strings.Contains(o.InputRef.GoTypeElem(), ".") {
o.imports["github.com/aws/aws-sdk-go/service/"+strings.Split(o.InputRef.GoTypeElem(), ".")[0]] = true
return fmt.Sprintf("var params *%s", o.InputRef.GoTypeElem())
}
return fmt.Sprintf("var params *%s.%s",
o.API.PackageName(), o.InputRef.GoTypeElem())
}
e := example{o, map[string]int{}}
return "params := " + e.traverseAny(o.InputRef.Shape, false, false)
}
// A example provides
type example struct {
*Operation
visited map[string]int
}
// traverseAny returns rendered Go code for the shape.
func (e *example) traverseAny(s *Shape, required, payload bool) string {
str := ""
e.visited[s.ShapeName]++
switch s.Type {
case "structure":
str = e.traverseStruct(s, required, payload)
case "list":
str = e.traverseList(s, required, payload)
case "map":
str = e.traverseMap(s, required, payload)
case "jsonvalue":
str = "aws.JSONValue{\"key\": \"value\"}"
if required {
str += " // Required"
}
default:
str = e.traverseScalar(s, required, payload)
}
e.visited[s.ShapeName]--
return str
}
var reType = regexp.MustCompile(`\b([A-Z])`)
// traverseStruct returns rendered Go code for a structure type shape.
func (e *example) traverseStruct(s *Shape, required, payload bool) string {
var buf bytes.Buffer
if s.resolvePkg != "" {
e.imports[s.resolvePkg] = true
buf.WriteString("&" + s.GoTypeElem() + "{")
} else {
buf.WriteString("&" + s.API.PackageName() + "." + s.GoTypeElem() + "{")
}
if required {
buf.WriteString(" // Required")
}
buf.WriteString("\n")
req := make([]string, len(s.Required))
copy(req, s.Required)
sort.Strings(req)
if e.visited[s.ShapeName] < 2 {
for _, n := range req {
m := s.MemberRefs[n].Shape
p := n == s.Payload && (s.MemberRefs[n].Streaming || m.Streaming)
buf.WriteString(n + ": " + e.traverseAny(m, true, p) + ",")
if m.Type != "list" && m.Type != "structure" && m.Type != "map" {
buf.WriteString(" // Required")
}
buf.WriteString("\n")
}
for _, n := range s.MemberNames() {
if s.IsRequired(n) {
continue
}
m := s.MemberRefs[n].Shape
p := n == s.Payload && (s.MemberRefs[n].Streaming || m.Streaming)
buf.WriteString(n + ": " + e.traverseAny(m, false, p) + ",\n")
}
} else {
buf.WriteString("// Recursive values...\n")
}
buf.WriteString("}")
return buf.String()
}
// traverseMap returns rendered Go code for a map type shape.
func (e *example) traverseMap(s *Shape, required, payload bool) string {
var buf bytes.Buffer
t := ""
if s.resolvePkg != "" {
e.imports[s.resolvePkg] = true
t = s.GoTypeElem()
} else {
t = reType.ReplaceAllString(s.GoTypeElem(), s.API.PackageName()+".$1")
}
buf.WriteString(t + "{")
if required {
buf.WriteString(" // Required")
}
buf.WriteString("\n")
if e.visited[s.ShapeName] < 2 {
m := s.ValueRef.Shape
buf.WriteString("\"Key\": " + e.traverseAny(m, true, false) + ",")
if m.Type != "list" && m.Type != "structure" && m.Type != "map" {
buf.WriteString(" // Required")
}
buf.WriteString("\n// More values...\n")
} else {
buf.WriteString("// Recursive values...\n")
}
buf.WriteString("}")
return buf.String()
}
// traverseList returns rendered Go code for a list type shape.
func (e *example) traverseList(s *Shape, required, payload bool) string {
var buf bytes.Buffer
t := ""
if s.resolvePkg != "" {
e.imports[s.resolvePkg] = true
t = s.GoTypeElem()
} else {
t = reType.ReplaceAllString(s.GoTypeElem(), s.API.PackageName()+".$1")
}
buf.WriteString(t + "{")
if required {
buf.WriteString(" // Required")
}
buf.WriteString("\n")
if e.visited[s.ShapeName] < 2 {
m := s.MemberRef.Shape
buf.WriteString(e.traverseAny(m, true, false) + ",")
if m.Type != "list" && m.Type != "structure" && m.Type != "map" {
buf.WriteString(" // Required")
}
buf.WriteString("\n// More values...\n")
} else {
buf.WriteString("// Recursive values...\n")
}
buf.WriteString("}")
return buf.String()
}
// traverseScalar returns an AWS Type string representation initialized to a value.
// Will panic if s is an unsupported shape type.
func (e *example) traverseScalar(s *Shape, required, payload bool) string {
str := ""
switch s.Type {
case "integer", "long":
str = `aws.Int64(1)`
case "float", "double":
str = `aws.Float64(1.0)`
case "string", "character":
str = `aws.String("` + s.ShapeName + `")`
case "blob":
if payload {
str = `bytes.NewReader([]byte("PAYLOAD"))`
} else {
str = `[]byte("PAYLOAD")`
}
case "boolean":
str = `aws.Bool(true)`
case "timestamp":
str = `aws.Time(time.Now())`
default:
panic("unsupported shape " + s.Type)
}
return str
}