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package
v2.0.0-rc.21 Latest Latest
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 Go to latest Published: Apr 11, 2024 License: MIT Imports: 31 Imported by: 17

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Index

Constants

View Source 
const (
	IntrospectionSchemaTypeDataSourceID     = "introspection__schema&__type"
	IntrospectionTypeFieldsDataSourceID     = "introspection__type__fields"
	IntrospectionTypeEnumValuesDataSourceID = "introspection__type__enumValues"
)
View Source 
const (
	VariableRendererKindPlain                 = "plain"
	VariableRendererKindPlanWithValidation    = "plainWithValidation"
	VariableRendererKindJson                  = "json"
	VariableRendererKindJsonWithValidation    = "jsonWithValidation"
	VariableRendererKindGraphqlWithValidation = "graphqlWithValidation"
	VariableRendererKindGraphqlResolve        = "graphqlResolve"
	VariableRendererKindCsv                   = "csv"
)

Variables

View Source 
var (
	ErrResolverClosed = errors.New("resolver closed")
)
View Source 
var (
	ErrUnableToResolve = errors.New("unable to resolve operation")
)

Functions

func GetDurationNanoSinceTraceStart 

func GetDurationNanoSinceTraceStart(ctx context.Context) int64

func IsIntrospectionDataSource 

func IsIntrospectionDataSource(dataSourceID string) bool

func SetInputUndefinedVariables 

func SetInputUndefinedVariables(preparedInput *bytes.Buffer, undefinedVariables []string) error

func SetNormalizeStats 

func SetNormalizeStats(ctx context.Context, stats PhaseStats)

func SetParseStats 

func SetParseStats(ctx context.Context, stats PhaseStats)

func SetPlannerStats 

func SetPlannerStats(ctx context.Context, stats PhaseStats)

func SetTraceStart 

func SetTraceStart(ctx context.Context, predictableDebugTimings bool) context.Context

func SetValidateStats 

func SetValidateStats(ctx context.Context, stats PhaseStats)

func SingleFlightDisallowed 

func SingleFlightDisallowed(ctx context.Context) bool

Types

type Array 

type Array struct {
	Path                []string
	Nullable            bool
	ResolveAsynchronous bool
	Item                Node
	Items               []Node
}

func (*Array) HasChildFetches 

func (a *Array) HasChildFetches() bool

func (*Array) NodeKind 

func (_ *Array) NodeKind() NodeKind

func (*Array) NodeNullable 

func (a *Array) NodeNullable() bool

func (*Array) NodePath 

func (a *Array) NodePath() []string

type AsyncErrorWriter 

type AsyncErrorWriter interface {
	WriteError(ctx *Context, err error, res *GraphQLResponse, w io.Writer, buf *bytes.Buffer)
}

type AuthorizationDeny 

type AuthorizationDeny struct {
	Reason string
}

type Authorizer 

type Authorizer interface {
	// AuthorizePreFetch is called prior to making a fetch in the loader
	// This allows to implement policies to prevent fetches to an origin
	// E.g. for Mutations, it might be undesired to just filter out the response
	// You'd want to prevent sending the Operation to the Origin completely
	//
	// The input argument is the final render of the datasource input
	AuthorizePreFetch(ctx *Context, dataSourceID string, input json.RawMessage, coordinate GraphCoordinate) (result *AuthorizationDeny, err error)
	// AuthorizeObjectField operates on the response and can solely be used to implement policies to filter out response fields
	// In contrast to AuthorizePreFetch, this cannot be used to prevent origin requests
	// This function only allows you to filter the response before rendering it to the client
	//
	// The object argument is the flat render of the field-enclosing response object
	// Flat render means, we're only rendering scalars, not arrays or objects
	AuthorizeObjectField(ctx *Context, dataSourceID string, object json.RawMessage, coordinate GraphCoordinate) (result *AuthorizationDeny, err error)
	HasResponseExtensionData(ctx *Context) bool
	RenderResponseExtension(ctx *Context, out io.Writer) error
}

type BatchEntityFetch 

type BatchEntityFetch struct {
	Input                BatchInput
	DataSource           DataSource
	PostProcessing       PostProcessingConfiguration
	DataSourceIdentifier []byte
	Trace                *DataSourceLoadTrace
	Info                 *FetchInfo
}

BatchEntityFetch - TODO: document better allows to join nested fetches to the same subgraph into a single fetch

func (*BatchEntityFetch) FetchKind 

func (_ *BatchEntityFetch) FetchKind() FetchKind

type BatchInput 

type BatchInput struct {
	Header InputTemplate
	Items  []InputTemplate
	// If SkipNullItems is set to true, items that render to null will not be included in the batch but skipped
	SkipNullItems bool
	// Same as SkipNullItems but for empty objects
	SkipEmptyObjectItems bool
	// If SkipErrItems is set to true, items that return an error during rendering will not be included in the batch but skipped
	// In this case, the error will be swallowed
	// E.g. if a field is not nullable and the value is null, the item will be skipped
	SkipErrItems bool
	Separator    InputTemplate
	Footer       InputTemplate
}

type BigInt 

type BigInt struct {
	Path     []string
	Nullable bool
	Export   *FieldExport `json:"export,omitempty"`
}

func (*BigInt) NodeKind 

func (_ *BigInt) NodeKind() NodeKind

func (*BigInt) NodeNullable 

func (b *BigInt) NodeNullable() bool

func (*BigInt) NodePath 

func (b *BigInt) NodePath() []string

type Boolean 

type Boolean struct {
	Path     []string
	Nullable bool
	Export   *FieldExport `json:"export,omitempty"`
}

func (*Boolean) NodeKind 

func (_ *Boolean) NodeKind() NodeKind

func (*Boolean) NodeNullable 

func (b *Boolean) NodeNullable() bool

func (*Boolean) NodePath 

func (b *Boolean) NodePath() []string

type BufPair 

type BufPair struct {
	Data   *fastbuffer.FastBuffer
	Errors *fastbuffer.FastBuffer
}

func NewBufPair 

func NewBufPair() *BufPair

func (*BufPair) HasData 

func (b *BufPair) HasData() bool

func (*BufPair) HasErrors 

func (b *BufPair) HasErrors() bool

func (*BufPair) Reset 

func (b *BufPair) Reset()

func (*BufPair) WriteErr 

func (b *BufPair) WriteErr(message, locations, path, extensions []byte)

type CSVVariableRenderer 

type CSVVariableRenderer struct {
	Kind string
	// contains filtered or unexported fields
}

CSVVariableRenderer is an implementation of VariableRenderer It renders the provided list of Values as comma separated Values in plaintext (no JSON encoding of Values)

func NewCSVVariableRenderer 

func NewCSVVariableRenderer(arrayValueType JsonRootType) *CSVVariableRenderer

func NewCSVVariableRendererFromTypeRef 

func NewCSVVariableRendererFromTypeRef(operation, definition *ast.Document, variableTypeRef int) *CSVVariableRenderer

func (*CSVVariableRenderer) GetKind 

func (c *CSVVariableRenderer) GetKind() string

func (*CSVVariableRenderer) RenderVariable 

func (c *CSVVariableRenderer) RenderVariable(_ context.Context, data []byte, out io.Writer) error

type ConnectDoneStats 

type ConnectDoneStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
	Network                  string `json:"network"`
	Addr                     string `json:"addr"`
	Err                      string `json:"err,omitempty"`
}

type ConnectStartStats 

type ConnectStartStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
	Network                  string `json:"network"`
	Addr                     string `json:"addr"`
}

type Context 

type Context struct {
	Variables        []byte
	Request          Request
	RenameTypeNames  []RenameTypeName
	TracingOptions   TraceOptions
	RateLimitOptions RateLimitOptions
	InitialPayload   []byte
	Extensions       []byte
	Stats            Stats
	LoaderHooks      LoaderHooks
	// contains filtered or unexported fields
}

func NewContext 

func NewContext(ctx context.Context) *Context

func (*Context) Context 

func (c *Context) Context() context.Context

func (*Context) Free 

func (c *Context) Free()

func (*Context) SetAuthorizer 

func (c *Context) SetAuthorizer(authorizer Authorizer)

func (*Context) SetEngineLoaderHooks 

func (c *Context) SetEngineLoaderHooks(hooks LoaderHooks)

func (*Context) SetRateLimiter 

func (c *Context) SetRateLimiter(limiter RateLimiter)

func (*Context) SubgraphErrors 

func (c *Context) SubgraphErrors() error

func (*Context) WithContext 

func (c *Context) WithContext(ctx context.Context) *Context

type ContextVariable 

type ContextVariable struct {
	Path     []string
	Renderer VariableRenderer
}

func (*ContextVariable) Equals 

func (c *ContextVariable) Equals(another Variable) bool

func (*ContextVariable) GetVariableKind 

func (_ *ContextVariable) GetVariableKind() VariableKind

func (*ContextVariable) TemplateSegment 

func (c *ContextVariable) TemplateSegment() TemplateSegment

type CustomNode 

type CustomNode struct {
	CustomResolve
	Nullable bool
	Path     []string
}

func (*CustomNode) NodeKind 

func (_ *CustomNode) NodeKind() NodeKind

func (*CustomNode) NodeNullable 

func (c *CustomNode) NodeNullable() bool

func (*CustomNode) NodePath 

func (c *CustomNode) NodePath() []string

type CustomResolve 

type CustomResolve interface {
	Resolve(value []byte) ([]byte, error)
}

type DNSDoneStats 

type DNSDoneStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
}

type DNSStartStats 

type DNSStartStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
	Host                     string `json:"host"`
}

type DataSource 

type DataSource interface {
	Load(ctx context.Context, input []byte, w io.Writer) (err error)
}

type DataSourceLoadTrace 

type DataSourceLoadTrace struct {
	RawInputData               json.RawMessage `json:"raw_input_data,omitempty"`
	Input                      json.RawMessage `json:"input,omitempty"`
	Output                     json.RawMessage `json:"output,omitempty"`
	LoadError                  string          `json:"error,omitempty"`
	DurationSinceStartNano     int64           `json:"duration_since_start_nanoseconds,omitempty"`
	DurationSinceStartPretty   string          `json:"duration_since_start_pretty,omitempty"`
	DurationLoadNano           int64           `json:"duration_load_nanoseconds,omitempty"`
	DurationLoadPretty         string          `json:"duration_load_pretty,omitempty"`
	SingleFlightUsed           bool            `json:"single_flight_used"`
	SingleFlightSharedResponse bool            `json:"single_flight_shared_response"`
	LoadSkipped                bool            `json:"load_skipped"`
	LoadStats                  *LoadStats      `json:"load_stats,omitempty"`
	Path                       string          `json:"-"`
}

type DeferField 

type DeferField struct{}

type EmptyArray 

type EmptyArray struct{}

func (*EmptyArray) NodeKind 

func (_ *EmptyArray) NodeKind() NodeKind

func (*EmptyArray) NodeNullable 

func (_ *EmptyArray) NodeNullable() bool

func (*EmptyArray) NodePath 

func (_ *EmptyArray) NodePath() []string

type EmptyObject 

type EmptyObject struct{}

func (*EmptyObject) NodeKind 

func (_ *EmptyObject) NodeKind() NodeKind

func (*EmptyObject) NodeNullable 

func (_ *EmptyObject) NodeNullable() bool

func (*EmptyObject) NodePath 

func (_ *EmptyObject) NodePath() []string

type EntityFetch 

type EntityFetch struct {
	Input                EntityInput
	DataSource           DataSource
	PostProcessing       PostProcessingConfiguration
	DataSourceIdentifier []byte
	Trace                *DataSourceLoadTrace
	Info                 *FetchInfo
}

func (*EntityFetch) FetchKind 

func (_ *EntityFetch) FetchKind() FetchKind

type EntityInput 

type EntityInput struct {
	Header      InputTemplate
	Item        InputTemplate
	SkipErrItem bool
	Footer      InputTemplate
}

type Fetch 

type Fetch interface {
	FetchKind() FetchKind
}

type FetchConfiguration 

type FetchConfiguration struct {
	Input      string
	Variables  Variables
	DataSource DataSource
	// RequiresParallelListItemFetch is used to indicate that the single fetches should be executed without batching
	// When we have multiple fetches attached to the object - after post-processing of a plan we will get ParallelListItemFetch instead of ParallelFetch
	RequiresParallelListItemFetch bool
	// RequiresEntityFetch will be set to true if the fetch is an entity fetch on an object. After post-processing, we will get EntityFetch
	RequiresEntityFetch bool
	// RequiresEntityBatchFetch indicates that entity fetches on array items could be batched. After post-processing, we will get EntityBatchFetch
	RequiresEntityBatchFetch bool
	PostProcessing           PostProcessingConfiguration
	// SetTemplateOutputToNullOnVariableNull will safely return "null" if one of the template variables renders to null
	// This is the case, e.g. when using batching and one sibling is null, resulting in a null value for one batch item
	// Returning null in this case tells the batch implementation to skip this item
	SetTemplateOutputToNullOnVariableNull bool
}

type FetchInfo 

type FetchInfo struct {
	DataSourceID  string
	RootFields    []GraphCoordinate
	OperationType ast.OperationType
}

type FetchKind 

type FetchKind int
const (
	FetchKindSingle FetchKind = iota + 1
	FetchKindParallel
	FetchKindSerial
	FetchKindParallelListItem
	FetchKindEntity
	FetchKindEntityBatch
	FetchKindMulti
)

type Field 

type Field struct {
	Name                    []byte
	Value                   Node
	Position                Position
	Defer                   *DeferField
	Stream                  *StreamField
	OnTypeNames             [][]byte
	SkipDirectiveDefined    bool
	SkipVariableName        string
	IncludeDirectiveDefined bool
	IncludeVariableName     string
	Info                    *FieldInfo
}

type FieldExport 

type FieldExport struct {
	Path     []string
	AsString bool
}

FieldExport takes the value of the field during evaluation (rendering of the field) and stores it in the variables using the Path as JSON pointer.

type FieldInfo 

type FieldInfo struct {
	// Name is the name of the field.
	Name                string
	ExactParentTypeName string
	// ParentTypeNames is the list of possible parent types for this field.
	// E.g. for a root field, this will be Query, Mutation, Subscription.
	// For a field on an object type, this will be the name of that object type.
	// For a field on an interface type, this will be the name of that interface type and all of its possible implementations.
	ParentTypeNames []string
	// NamedType is the underlying node type of the field.
	// E.g. for a field of type Hobby! this will be Hobby.
	// For a field of type [Hobby] this will be Hobby.
	// For a field of type [Hobby!]! this will be Hobby.
	// For scalar fields, this will return string, int, float, boolean, ID.
	NamedType string
	Source    TypeFieldSource
	FetchID   int
	// HasAuthorizationRule needs to be set to true if the Authorizer should be called for this field
	HasAuthorizationRule bool
}

func (*FieldInfo) Merge 

func (i *FieldInfo) Merge(other *FieldInfo)

type Float 

type Float struct {
	Path     []string
	Nullable bool
	Export   *FieldExport `json:"export,omitempty"`
}

func (*Float) NodeKind 

func (_ *Float) NodeKind() NodeKind

func (*Float) NodeNullable 

func (f *Float) NodeNullable() bool

func (*Float) NodePath 

func (f *Float) NodePath() []string

type GetConnStats 

type GetConnStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
	HostPort                 string `json:"host_port"`
}

type GetTraceOption 

type GetTraceOption func(*getTraceOptions)

func GetTraceDebug 

func GetTraceDebug() GetTraceOption

type GotConnStats 

type GotConnStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
	Reused                   bool   `json:"reused"`
	WasIdle                  bool   `json:"was_idle"`
	IdleTimeNano             int64  `json:"idle_time_nanoseconds"`
	IdleTimePretty           string `json:"idle_time_pretty"`
}

type GotFirstResponseByteStats 

type GotFirstResponseByteStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
}

type GraphCoordinate 

type GraphCoordinate struct {
	TypeName             string `json:"typeName"`
	FieldName            string `json:"fieldName"`
	HasAuthorizationRule bool   `json:"-"`
}

type GraphQLError 

type GraphQLError struct {
	Message    string                 `json:"message"`
	Locations  []Location             `json:"locations,omitempty"`
	Path       []string               `json:"path"`
	Extensions map[string]interface{} `json:"extensions,omitempty"`
}

type GraphQLResponse 

type GraphQLResponse struct {
	Data            *Object
	RenameTypeNames []RenameTypeName
	Info            *GraphQLResponseInfo
}

type GraphQLResponseInfo 

type GraphQLResponseInfo struct {
	OperationType ast.OperationType
}

type GraphQLSubscription 

type GraphQLSubscription struct {
	Trigger  GraphQLSubscriptionTrigger
	Response *GraphQLResponse
}

type GraphQLSubscriptionTrigger 

type GraphQLSubscriptionTrigger struct {
	Input          []byte
	InputTemplate  InputTemplate
	Variables      Variables
	Source         SubscriptionDataSource
	PostProcessing PostProcessingConfiguration
}

type GraphQLVariableRenderer 

type GraphQLVariableRenderer struct {
	JSONSchema string
	Kind       string
	// contains filtered or unexported fields
}

GraphQLVariableRenderer is an implementation of VariableRenderer It renders variables according to the GraphQL Specification

func NewGraphQLVariableRenderer 

func NewGraphQLVariableRenderer(jsonSchema string) *GraphQLVariableRenderer

NewGraphQLVariableRenderer - to be used in tests only

func NewGraphQLVariableRendererFromJSONRootTypeWithoutValidation 

func NewGraphQLVariableRendererFromJSONRootTypeWithoutValidation(rootType JsonRootType) (*GraphQLVariableRenderer, error)

NewGraphQLVariableRendererFromJSONRootTypeWithoutValidation - to be used in tests only

func NewGraphQLVariableRendererFromTypeRef 

func NewGraphQLVariableRendererFromTypeRef(operation, definition *ast.Document, variableTypeRef int) (*GraphQLVariableRenderer, error)

NewGraphQLVariableRendererFromTypeRef creates a new GraphQLVariableRenderer The argument typeRef must exist on the operation ast.Document, otherwise it will panic!

func NewGraphQLVariableRendererFromTypeRefWithOverrides 

func NewGraphQLVariableRendererFromTypeRefWithOverrides(operation, definition *ast.Document, variableTypeRef int, overrides map[string]graphqljsonschema.JsonSchema) (*GraphQLVariableRenderer, error)

func NewGraphQLVariableRendererFromTypeRefWithoutValidation 

func NewGraphQLVariableRendererFromTypeRefWithoutValidation(operation, definition *ast.Document, variableTypeRef int) (*GraphQLVariableRenderer, error)

func (*GraphQLVariableRenderer) GetKind 

func (g *GraphQLVariableRenderer) GetKind() string

func (*GraphQLVariableRenderer) RenderVariable 

func (g *GraphQLVariableRenderer) RenderVariable(ctx context.Context, data []byte, out io.Writer) error

type GraphQLVariableResolveRenderer 

type GraphQLVariableResolveRenderer struct {
	Kind string
	Node Node
}

func NewGraphQLVariableResolveRenderer 

func NewGraphQLVariableResolveRenderer(node Node) *GraphQLVariableResolveRenderer

func (*GraphQLVariableResolveRenderer) GetKind 

func (g *GraphQLVariableResolveRenderer) GetKind() string

func (*GraphQLVariableResolveRenderer) RenderVariable 

func (g *GraphQLVariableResolveRenderer) RenderVariable(ctx context.Context, data []byte, out io.Writer) error

type HeaderVariable 

type HeaderVariable struct {
	Path []string
}

func (*HeaderVariable) Equals 

func (h *HeaderVariable) Equals(another Variable) bool

func (*HeaderVariable) GetVariableKind 

func (h *HeaderVariable) GetVariableKind() VariableKind

func (*HeaderVariable) TemplateSegment 

func (h *HeaderVariable) TemplateSegment() TemplateSegment

type InputTemplate 

type InputTemplate struct {
	Segments []TemplateSegment
	// SetTemplateOutputToNullOnVariableNull will safely return "null" if one of the template variables renders to null
	// This is the case, e.g. when using batching and one sibling is null, resulting in a null value for one batch item
	// Returning null in this case tells the batch implementation to skip this item
	SetTemplateOutputToNullOnVariableNull bool
}

func (*InputTemplate) Render 

func (i *InputTemplate) Render(ctx *Context, data []byte, preparedInput *bytes.Buffer) error

func (*InputTemplate) RenderAndCollectUndefinedVariables 

func (i *InputTemplate) RenderAndCollectUndefinedVariables(ctx *Context, data []byte, preparedInput *bytes.Buffer, undefinedVariables *[]string) (err error)

type Integer 

type Integer struct {
	Path     []string
	Nullable bool
	Export   *FieldExport `json:"export,omitempty"`
}

func (*Integer) NodeKind 

func (_ *Integer) NodeKind() NodeKind

func (*Integer) NodeNullable 

func (i *Integer) NodeNullable() bool

func (*Integer) NodePath 

func (i *Integer) NodePath() []string

type JSONVariableRenderer 

type JSONVariableRenderer struct {
	JSONSchema string
	Kind       string
	// contains filtered or unexported fields
}

JSONVariableRenderer is an implementation of VariableRenderer It renders the provided data as JSON If configured, it also does a JSON Validation Check before rendering

func NewJSONVariableRenderer 

func NewJSONVariableRenderer() *JSONVariableRenderer

func NewJSONVariableRendererWithValidation 

func NewJSONVariableRendererWithValidation(jsonSchema string) *JSONVariableRenderer

func NewJSONVariableRendererWithValidationFromTypeRef 

func NewJSONVariableRendererWithValidationFromTypeRef(operation, definition *ast.Document, variableTypeRef int) (*JSONVariableRenderer, error)

NewJSONVariableRendererWithValidationFromTypeRef creates a new JSONVariableRenderer The argument typeRef must exist on the operation ast.Document, otherwise it will panic!

func (*JSONVariableRenderer) GetKind 

func (r *JSONVariableRenderer) GetKind() string

func (*JSONVariableRenderer) RenderVariable 

func (r *JSONVariableRenderer) RenderVariable(ctx context.Context, data []byte, out io.Writer) error

type JsonRootType 

type JsonRootType struct {
	Value  jsonparser.ValueType
	Values []jsonparser.ValueType
	Kind   JsonRootTypeKind
}

func (JsonRootType) Satisfies 

func (t JsonRootType) Satisfies(dataType jsonparser.ValueType) bool

type JsonRootTypeKind 

type JsonRootTypeKind int
const (
	JsonRootTypeKindSingle JsonRootTypeKind = iota
	JsonRootTypeKindMultiple
)

type LoadStats 

type LoadStats struct {
	GetConn              GetConnStats              `json:"get_conn"`
	GotConn              GotConnStats              `json:"got_conn"`
	GotFirstResponseByte GotFirstResponseByteStats `json:"got_first_response_byte"`
	DNSStart             DNSStartStats             `json:"dns_start"`
	DNSDone              DNSDoneStats              `json:"dns_done"`
	ConnectStart         ConnectStartStats         `json:"connect_start"`
	ConnectDone          ConnectDoneStats          `json:"connect_done"`
	TLSHandshakeStart    TLSHandshakeStartStats    `json:"tls_handshake_start"`
	TLSHandshakeDone     TLSHandshakeDoneStats     `json:"tls_handshake_done"`
	WroteHeaders         WroteHeadersStats         `json:"wrote_headers"`
	WroteRequest         WroteRequestStats         `json:"wrote_request"`
}

type Loader 

type Loader struct {
	// contains filtered or unexported fields
}

func (*Loader) Free 

func (l *Loader) Free()

func (*Loader) LoadGraphQLResponseData 

func (l *Loader) LoadGraphQLResponseData(ctx *Context, response *GraphQLResponse, resolvable *Resolvable) (err error)

type LoaderHooks 

type LoaderHooks interface {
	// OnLoad is called before the fetch is executed
	OnLoad(ctx context.Context, dataSourceID string) context.Context
	// OnFinished is called after the fetch has been executed and the response has been processed and merged
	OnFinished(ctx context.Context, statusCode int, dataSourceID string, err error)
}

type Location 

type Location struct {
	Line   uint32 `json:"line"`
	Column uint32 `json:"column"`
}

type MultiFetch 

type MultiFetch struct {
	Fetches []*SingleFetch
}

func (*MultiFetch) FetchKind 

func (_ *MultiFetch) FetchKind() FetchKind

type Node 

type Node interface {
	NodeKind() NodeKind
	NodePath() []string
	NodeNullable() bool
}

type NodeKind 

type NodeKind int
const (
	NodeKindObject NodeKind = iota + 1
	NodeKindEmptyObject
	NodeKindArray
	NodeKindEmptyArray
	NodeKindNull
	NodeKindString
	NodeKindBoolean
	NodeKindInteger
	NodeKindFloat
	NodeKindBigInt
	NodeKindCustom
	NodeKindScalar
	NodeKindStaticString
)

type Null 

type Null struct {
}

func (*Null) NodeKind 

func (_ *Null) NodeKind() NodeKind

func (*Null) NodeNullable 

func (_ *Null) NodeNullable() bool

func (*Null) NodePath 

func (_ *Null) NodePath() []string

type Object 

type Object struct {
	Nullable             bool
	Path                 []string
	Fields               []*Field
	Fetch                Fetch
	UnescapeResponseJson bool `json:"unescape_response_json,omitempty"`
}

func (*Object) HasChildFetches 

func (o *Object) HasChildFetches() bool

func (*Object) NodeKind 

func (_ *Object) NodeKind() NodeKind

func (*Object) NodeNullable 

func (o *Object) NodeNullable() bool

func (*Object) NodePath 

func (o *Object) NodePath() []string

type ObjectVariable 

type ObjectVariable struct {
	Path     []string
	Renderer VariableRenderer
}

func (*ObjectVariable) Equals 

func (o *ObjectVariable) Equals(another Variable) bool

func (*ObjectVariable) GetVariableKind 

func (o *ObjectVariable) GetVariableKind() VariableKind

func (*ObjectVariable) TemplateSegment 

func (o *ObjectVariable) TemplateSegment() TemplateSegment

type ParallelFetch 

type ParallelFetch struct {
	Fetches []Fetch
	Trace   *DataSourceLoadTrace
}

ParallelFetch - TODO: document better should be used only for object fields which could be fetched parallel

func (*ParallelFetch) FetchKind 

func (_ *ParallelFetch) FetchKind() FetchKind

type ParallelListItemFetch 

type ParallelListItemFetch struct {
	Fetch  *SingleFetch
	Traces []*SingleFetch
	Trace  *DataSourceLoadTrace
}

The ParallelListItemFetch can be used to make nested parallel fetches within a list Usually, you want to batch fetches within a list, which is the default behavior of SingleFetch However, if the data source does not support batching, you can use this fetch to make parallel fetches within a list

func (*ParallelListItemFetch) FetchKind 

func (_ *ParallelListItemFetch) FetchKind() FetchKind

type PhaseStats 

type PhaseStats struct {
	DurationNano             int64  `json:"duration_nanoseconds"`
	DurationPretty           string `json:"duration_pretty"`
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
}

func SetDebugStats 

func SetDebugStats(info *TraceInfo, stats PhaseStats, phaseNo int64) PhaseStats

type PlainVariableRenderer 

type PlainVariableRenderer struct {
	JSONSchema string
	Kind       string
	// contains filtered or unexported fields
}

PlainVariableRenderer is an implementation of VariableRenderer It renders the provided data as plain text E.g. a provided JSON string of "foo" will be rendered as foo, without quotes. If a nested JSON Object is provided, it will be rendered as is. This renderer can be used e.g. to render the provided scalar into a URL.

func NewPlainVariableRenderer 

func NewPlainVariableRenderer() *PlainVariableRenderer

func NewPlainVariableRendererWithValidation 

func NewPlainVariableRendererWithValidation(jsonSchema string) *PlainVariableRenderer

func NewPlainVariableRendererWithValidationFromTypeRef 

func NewPlainVariableRendererWithValidationFromTypeRef(operation, definition *ast.Document, variableTypeRef int, variablePath ...string) (*PlainVariableRenderer, error)

NewPlainVariableRendererWithValidationFromTypeRef creates a new PlainVariableRenderer The argument typeRef must exist on the operation ast.Document, otherwise it will panic!

func (*PlainVariableRenderer) GetKind 

func (p *PlainVariableRenderer) GetKind() string

func (*PlainVariableRenderer) RenderVariable 

func (p *PlainVariableRenderer) RenderVariable(ctx context.Context, data []byte, out io.Writer) error

type Position 

type Position struct {
	Line   uint32
	Column uint32
}

type PostProcessingConfiguration 

type PostProcessingConfiguration struct {
	// SelectResponseDataPath used to make a jsonparser.Get call on the response data
	SelectResponseDataPath []string
	// SelectResponseErrorsPath is similar to SelectResponseDataPath, but for errors
	// If this is set, the response will be considered an error if the jsonparser.Get call returns a non-empty value
	// The value will be expected to be a GraphQL error object
	SelectResponseErrorsPath []string
	// ResponseTemplate is processed after the SelectResponseDataPath is applied
	// It can be used to "render" the response data into a different format
	// E.g. when you're making a representations Request with two entities, you will get back an array of two objects
	// However, you might want to render this into a single object with two properties
	// This can be done with a ResponseTemplate
	ResponseTemplate *InputTemplate
	// MergePath can be defined to merge the result of the post-processing into the parent object at the given path
	// e.g. if the parent is {"a":1}, result is {"foo":"bar"} and the MergePath is ["b"],
	// the result will be {"a":1,"b":{"foo":"bar"}}
	// If the MergePath is empty, the result will be merged into the parent object
	// In this case, the result would be {"a":1,"foo":"bar"}
	// This is useful if you make multiple fetches, e.g. parallel fetches, that would otherwise overwrite each other
	MergePath []string
}

type RateLimitDeny 

type RateLimitDeny struct {
	Reason string
}

type RateLimitError 

type RateLimitError struct {
	SubgraphName string
	Path         string
	Reason       string
}

func NewRateLimitError 

func NewRateLimitError(subgraphName, path, reason string) *RateLimitError

func (*RateLimitError) Error 

func (e *RateLimitError) Error() string

type RateLimitOptions 

type RateLimitOptions struct {
	// Enable switches rate limiting on or off
	Enable bool
	// IncludeStatsInResponseExtension includes the rate limit stats in the response extensions
	IncludeStatsInResponseExtension bool

	Rate                    int
	Burst                   int
	Period                  time.Duration
	RateLimitKey            string
	RejectExceedingRequests bool
}

type RateLimiter 

type RateLimiter interface {
	RateLimitPreFetch(ctx *Context, info *FetchInfo, input json.RawMessage) (result *RateLimitDeny, err error)
	RenderResponseExtension(ctx *Context, out io.Writer) error
}

type RenameTypeName 

type RenameTypeName struct {
	From, To []byte
}

type Reporter 

type Reporter interface {
	SubscriptionUpdateSent()
	SubscriptionCountInc(count int)
	SubscriptionCountDec(count int)
	TriggerCountInc(count int)
	TriggerCountDec(count int)
}

type Request 

type Request struct {
	ID     string
	Header http.Header
}

type Resolvable 

type Resolvable struct {
	// contains filtered or unexported fields
}

func NewResolvable 

func NewResolvable() *Resolvable

func (*Resolvable) Init 

func (r *Resolvable) Init(ctx *Context, initialData []byte, operationType ast.OperationType) (err error)

func (*Resolvable) InitSubscription 

func (r *Resolvable) InitSubscription(ctx *Context, initialData []byte, postProcessing PostProcessingConfiguration) (err error)

func (*Resolvable) Reset 

func (r *Resolvable) Reset()

func (*Resolvable) Resolve 

func (r *Resolvable) Resolve(ctx context.Context, root *Object, out io.Writer) error

func (*Resolvable) WroteErrorsWithoutData 

func (r *Resolvable) WroteErrorsWithoutData() bool

type ResolvableObjectVariable 

type ResolvableObjectVariable struct {
	Renderer *GraphQLVariableResolveRenderer
}

func NewResolvableObjectVariable 

func NewResolvableObjectVariable(node *Object) *ResolvableObjectVariable

func (*ResolvableObjectVariable) Equals 

func (h *ResolvableObjectVariable) Equals(another Variable) bool

func (*ResolvableObjectVariable) GetVariableKind 

func (h *ResolvableObjectVariable) GetVariableKind() VariableKind

func (*ResolvableObjectVariable) TemplateSegment 

func (h *ResolvableObjectVariable) TemplateSegment() TemplateSegment

type Resolver 

type Resolver struct {
	// contains filtered or unexported fields
}

func New 

func New(ctx context.Context, options ResolverOptions) *Resolver

New returns a new Resolver, ctx.Done() is used to cancel all active subscriptions & streams

func (*Resolver) AsyncResolveGraphQLSubscription 

func (r *Resolver) AsyncResolveGraphQLSubscription(ctx *Context, subscription *GraphQLSubscription, writer SubscriptionResponseWriter, id SubscriptionIdentifier) (err error)

func (*Resolver) AsyncUnsubscribeClient 

func (r *Resolver) AsyncUnsubscribeClient(connectionID int64) error

func (*Resolver) AsyncUnsubscribeSubscription 

func (r *Resolver) AsyncUnsubscribeSubscription(id SubscriptionIdentifier) error

func (*Resolver) ResolveGraphQLResponse 

func (r *Resolver) ResolveGraphQLResponse(ctx *Context, response *GraphQLResponse, data []byte, writer io.Writer) (err error)

func (*Resolver) ResolveGraphQLSubscription 

func (r *Resolver) ResolveGraphQLSubscription(ctx *Context, subscription *GraphQLSubscription, writer SubscriptionResponseWriter) error

func (*Resolver) SetAsyncErrorWriter 

func (r *Resolver) SetAsyncErrorWriter(w AsyncErrorWriter)

type ResolverOptions 

type ResolverOptions struct {
	// MaxConcurrency limits the number of concurrent resolve operations
	// if set to 0, no limit is applied
	// It is advised to set this to a reasonable value to prevent excessive memory usage
	// Each concurrent resolve operation allocates ~50kb of memory
	// In addition, there's a limit of how many concurrent requests can be efficiently resolved
	// This depends on the number of CPU cores available, the complexity of the operations, and the origin services
	MaxConcurrency int

	MaxSubscriptionWorkers int

	Debug bool

	Reporter         Reporter
	AsyncErrorWriter AsyncErrorWriter

	PropagateSubgraphErrors      bool
	PropagateSubgraphStatusCodes bool
}

type ResponseWriter 

type ResponseWriter interface {
	io.Writer
}

type Scalar 

type Scalar struct {
	Path     []string
	Nullable bool
	Export   *FieldExport `json:"export,omitempty"`
}

func (*Scalar) NodeKind 

func (_ *Scalar) NodeKind() NodeKind

func (*Scalar) NodeNullable 

func (s *Scalar) NodeNullable() bool

func (*Scalar) NodePath 

func (s *Scalar) NodePath() []string

type SegmentType 

type SegmentType int
const (
	StaticSegmentType SegmentType = iota + 1
	VariableSegmentType
)

type SerialFetch 

type SerialFetch struct {
	Fetches []Fetch
	Trace   *DataSourceLoadTrace
}

SerialFetch - TODO: document better should be used only for object fields which should be fetched serial

func (*SerialFetch) FetchKind 

func (_ *SerialFetch) FetchKind() FetchKind

type SimpleResolver 

type SimpleResolver struct {
}

func NewSimpleResolver 

func NewSimpleResolver() *SimpleResolver

type SingleFetch 

type SingleFetch struct {
	FetchConfiguration
	FetchID              int
	DependsOnFetchIDs    []int
	InputTemplate        InputTemplate
	DataSourceIdentifier []byte
	Trace                *DataSourceLoadTrace
	Info                 *FetchInfo
}

func (*SingleFetch) FetchKind 

func (_ *SingleFetch) FetchKind() FetchKind

type SingleFlightStats 

type SingleFlightStats struct {
	SingleFlightUsed           bool
	SingleFlightSharedResponse bool
}

func GetSingleFlightStats 

func GetSingleFlightStats(ctx context.Context) *SingleFlightStats

type StaticString 

type StaticString struct {
	Path  []string
	Value string
}

func (*StaticString) NodeKind 

func (_ *StaticString) NodeKind() NodeKind

func (*StaticString) NodeNullable 

func (s *StaticString) NodeNullable() bool

func (*StaticString) NodePath 

func (s *StaticString) NodePath() []string

type Stats 

type Stats struct {
	NumberOfFetches      atomic.Int32
	CombinedResponseSize atomic.Int64
	ResolvedNodes        int
	ResolvedObjects      int
	ResolvedLeafs        int
}

func (*Stats) Reset 

func (s *Stats) Reset()

type StreamField 

type StreamField struct {
	InitialBatchSize int
}

type String 

type String struct {
	Path                 []string
	Nullable             bool
	Export               *FieldExport `json:"export,omitempty"`
	UnescapeResponseJson bool         `json:"unescape_response_json,omitempty"`
	IsTypeName           bool         `json:"is_type_name,omitempty"`
}

func (*String) NodeKind 

func (_ *String) NodeKind() NodeKind

func (*String) NodeNullable 

func (s *String) NodeNullable() bool

func (*String) NodePath 

func (s *String) NodePath() []string

type SubgraphError 

type SubgraphError struct {
	SubgraphName string
	Path         string
	Reason       string
	ResponseCode int

	DownstreamErrors []*GraphQLError
}

func NewSubgraphError 

func NewSubgraphError(subgraphName, path, reason string, responseCode int) *SubgraphError

func (*SubgraphError) AppendDownstreamError 

func (e *SubgraphError) AppendDownstreamError(error *GraphQLError)

func (*SubgraphError) Error 

func (e *SubgraphError) Error() string

type SubscriptionDataSource 

type SubscriptionDataSource interface {
	Start(ctx *Context, input []byte, updater SubscriptionUpdater) error
	UniqueRequestID(ctx *Context, input []byte, xxh *xxhash.Digest) (err error)
}

type SubscriptionIdentifier 

type SubscriptionIdentifier struct {
	ConnectionID   int64
	SubscriptionID int64
	// contains filtered or unexported fields
}

type SubscriptionResponseWriter 

type SubscriptionResponseWriter interface {
	ResponseWriter
	Flush() error
	Complete()
}

type SubscriptionUpdater 

type SubscriptionUpdater interface {
	Update(data []byte)
	Done()
}

type TLSHandshakeDoneStats 

type TLSHandshakeDoneStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
	Err                      string `json:"err,omitempty"`
}

type TLSHandshakeStartStats 

type TLSHandshakeStartStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
}

type TemplateSegment 

type TemplateSegment struct {
	SegmentType        SegmentType
	Data               []byte
	VariableKind       VariableKind
	VariableSourcePath []string
	Renderer           VariableRenderer
	Segments           []TemplateSegment
}

type TraceFetch 

type TraceFetch struct {
	Id                   string                 `json:"id,omitempty"`
	Type                 TraceFetchType         `json:"type,omitempty"`
	Path                 string                 `json:"path,omitempty"`
	DataSourceID         string                 `json:"data_source_id,omitempty"`
	Fetches              []*TraceFetch          `json:"fetches,omitempty"`
	DataSourceLoadTrace  *DataSourceLoadTrace   `json:"datasource_load_trace,omitempty"`
	DataSourceLoadTraces []*DataSourceLoadTrace `json:"data_source_load_traces,omitempty"`
}

type TraceFetchEvents 

type TraceFetchEvents struct {
	InputBeforeSourceLoad json.RawMessage `json:"input_before_source_load,omitempty"`
}

type TraceFetchType 

type TraceFetchType string
const (
	TraceFetchTypeSingle           TraceFetchType = "single"
	TraceFetchTypeParallel         TraceFetchType = "parallel"
	TraceFetchTypeSerial           TraceFetchType = "serial"
	TraceFetchTypeParallelListItem TraceFetchType = "parallelListItem"
	TraceFetchTypeEntity           TraceFetchType = "entity"
	TraceFetchTypeBatchEntity      TraceFetchType = "batchEntity"
)

type TraceField 

type TraceField struct {
	Name            string     `json:"name,omitempty"`
	Value           *TraceNode `json:"value,omitempty"`
	ParentTypeNames []string   `json:"parent_type_names,omitempty"`
	NamedType       string     `json:"named_type,omitempty"`
	DataSourceIDs   []string   `json:"data_source_ids,omitempty"`
}

type TraceInfo 

type TraceInfo struct {
	TraceStart     time.Time  `json:"-"`
	TraceStartTime string     `json:"trace_start_time"`
	TraceStartUnix int64      `json:"trace_start_unix"`
	ParseStats     PhaseStats `json:"parse_stats"`
	NormalizeStats PhaseStats `json:"normalize_stats"`
	ValidateStats  PhaseStats `json:"validate_stats"`
	PlannerStats   PhaseStats `json:"planner_stats"`
	// contains filtered or unexported fields
}

func GetTraceInfo 

func GetTraceInfo(ctx context.Context) *TraceInfo

type TraceNode 

type TraceNode struct {
	Info                 *TraceInfo    `json:"info,omitempty"`
	Fetch                *TraceFetch   `json:"fetch,omitempty"`
	NodeType             TraceNodeType `json:"node_type,omitempty"`
	Nullable             bool          `json:"nullable,omitempty"`
	Path                 []string      `json:"path,omitempty"`
	Fields               []*TraceField `json:"fields,omitempty"`
	Items                []*TraceNode  `json:"items,omitempty"`
	UnescapeResponseJson bool          `json:"unescape_response_json,omitempty"`
	IsTypeName           bool          `json:"is_type_name,omitempty"`
}

func GetTrace 

func GetTrace(ctx context.Context, root *Object, opts ...GetTraceOption) *TraceNode

type TraceNodeType 

type TraceNodeType string
const (
	TraceNodeTypeObject      TraceNodeType = "object"
	TraceNodeTypeEmptyObject TraceNodeType = "emptyObject"
	TraceNodeTypeArray       TraceNodeType = "array"
	TraceNodeTypeEmptyArray  TraceNodeType = "emptyArray"
	TraceNodeTypeNull        TraceNodeType = "null"
	TraceNodeTypeString      TraceNodeType = "string"
	TraceNodeTypeBoolean     TraceNodeType = "boolean"
	TraceNodeTypeInteger     TraceNodeType = "integer"
	TraceNodeTypeFloat       TraceNodeType = "float"
	TraceNodeTypeBigInt      TraceNodeType = "bigint"
	TraceNodeTypeCustom      TraceNodeType = "custom"
	TraceNodeTypeScalar      TraceNodeType = "scalar"
	TraceNodeTypeUnknown     TraceNodeType = "unknown"
)

type TraceOptions 

type TraceOptions struct {
	// Enable switches tracing on or off
	Enable bool
	// ExcludeParseStats excludes parse timing information from the trace output
	ExcludeParseStats bool
	// ExcludeNormalizeStats excludes normalize timing information from the trace output
	ExcludeNormalizeStats bool
	// ExcludeValidateStats excludes validation timing information from the trace output
	ExcludeValidateStats bool
	// ExcludePlannerStats excludes planner timing information from the trace output
	ExcludePlannerStats bool
	// ExcludeRawInputData excludes the raw input for a load operation from the trace output
	ExcludeRawInputData bool
	// ExcludeInput excludes the rendered input for a load operation from the trace output
	ExcludeInput bool
	// ExcludeOutput excludes the result of a load operation from the trace output
	ExcludeOutput bool
	// ExcludeLoadStats excludes the load timing information from the trace output
	ExcludeLoadStats bool
	// EnablePredictableDebugTimings makes the timings in the trace output predictable for debugging purposes
	EnablePredictableDebugTimings bool
	// IncludeTraceOutputInResponseExtensions includes the trace output in the response extensions
	IncludeTraceOutputInResponseExtensions bool
	// Debug makes trace IDs of fetches predictable for debugging purposes
	Debug bool
}

func (*TraceOptions) DisableAll 

func (r *TraceOptions) DisableAll()

func (*TraceOptions) EnableAll 

func (r *TraceOptions) EnableAll()

type TypeFieldSource 

type TypeFieldSource struct {
	IDs []string
}

type Variable 

type Variable interface {
	GetVariableKind() VariableKind
	Equals(another Variable) bool
	TemplateSegment() TemplateSegment
}

type VariableKind 

type VariableKind int
const (
	ContextVariableKind VariableKind = iota + 1
	ObjectVariableKind
	HeaderVariableKind
	ResolvableObjectVariableKind
	ListVariableKind
)

type VariableRenderer 

type VariableRenderer interface {
	GetKind() string
	RenderVariable(ctx context.Context, data []byte, out io.Writer) error
}

VariableRenderer is the interface to allow custom implementations of rendering Variables Depending on where a Variable is being used, a different method for rendering is required E.g. a Variable needs to be rendered conforming to the GraphQL specification, when used within a GraphQL Query If a Variable is used within a JSON Object, the contents need to be rendered as a JSON Object

type Variables 

type Variables []Variable

func NewVariables 

func NewVariables(variables ...Variable) Variables

func (*Variables) AddVariable 

func (v *Variables) AddVariable(variable Variable) (name string, exists bool)

type WroteHeadersStats 

type WroteHeadersStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
}

type WroteRequestStats 

type WroteRequestStats struct {
	DurationSinceStartNano   int64  `json:"duration_since_start_nanoseconds"`
	DurationSinceStartPretty string `json:"duration_since_start_pretty"`
	Err                      string `json:"err,omitempty"`
}

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