/
engine_config.go
232 lines (192 loc) · 7.32 KB
/
engine_config.go
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package engine
import (
"context"
"errors"
"net/http"
"github.com/wundergraph/graphql-go-tools/execution/graphql"
"github.com/wundergraph/graphql-go-tools/v2/pkg/ast"
"github.com/wundergraph/graphql-go-tools/v2/pkg/engine/datasource/graphql_datasource"
"github.com/wundergraph/graphql-go-tools/v2/pkg/engine/plan"
"github.com/wundergraph/graphql-go-tools/v2/pkg/engine/resolve"
)
const (
DefaultFlushIntervalInMilliseconds = 1000
)
type Configuration struct {
schema *graphql.Schema
plannerConfig plan.Configuration
websocketBeforeStartHook WebsocketBeforeStartHook
}
func NewConfiguration(schema *graphql.Schema) Configuration {
return Configuration{
schema: schema,
plannerConfig: plan.Configuration{
DefaultFlushIntervalMillis: DefaultFlushIntervalInMilliseconds,
DataSources: []plan.DataSource{},
Fields: plan.FieldConfigurations{},
},
}
}
func (e *Configuration) Schema() *graphql.Schema {
return e.schema
}
func (e *Configuration) SetCustomResolveMap(customResolveMap map[string]resolve.CustomResolve) {
e.plannerConfig.CustomResolveMap = customResolveMap
}
func (e *Configuration) AddDataSource(dataSource plan.DataSource) {
e.plannerConfig.DataSources = append(e.plannerConfig.DataSources, dataSource)
}
func (e *Configuration) SetDataSources(dataSources []plan.DataSource) {
e.plannerConfig.DataSources = dataSources
}
func (e *Configuration) AddFieldConfiguration(fieldConfig plan.FieldConfiguration) {
e.plannerConfig.Fields = append(e.plannerConfig.Fields, fieldConfig)
}
func (e *Configuration) SetFieldConfigurations(fieldConfigs plan.FieldConfigurations) {
e.plannerConfig.Fields = fieldConfigs
}
func (e *Configuration) DataSources() []plan.DataSource {
return e.plannerConfig.DataSources
}
func (e *Configuration) FieldConfigurations() plan.FieldConfigurations {
return e.plannerConfig.Fields
}
// SetWebsocketBeforeStartHook - sets before start hook which will be called before processing any operation sent over websockets
func (e *Configuration) SetWebsocketBeforeStartHook(hook WebsocketBeforeStartHook) {
e.websocketBeforeStartHook = hook
}
type dataSourceGeneratorOptions struct {
streamingClient *http.Client
subscriptionType SubscriptionType
subscriptionClientFactory graphql_datasource.GraphQLSubscriptionClientFactory
}
type DataSourceGeneratorOption func(options *dataSourceGeneratorOptions)
func WithDataSourceGeneratorSubscriptionConfiguration(streamingClient *http.Client, subscriptionType SubscriptionType) DataSourceGeneratorOption {
return func(options *dataSourceGeneratorOptions) {
options.streamingClient = streamingClient
options.subscriptionType = subscriptionType
}
}
func WithDataSourceGeneratorSubscriptionClientFactory(factory graphql_datasource.GraphQLSubscriptionClientFactory) DataSourceGeneratorOption {
return func(options *dataSourceGeneratorOptions) {
options.subscriptionClientFactory = factory
}
}
type graphqlDataSourceGenerator struct {
document *ast.Document
engineCtx context.Context
}
func newGraphQLDataSourceGenerator(engineCtx context.Context, document *ast.Document) *graphqlDataSourceGenerator {
return &graphqlDataSourceGenerator{
document: document,
engineCtx: engineCtx,
}
}
func (d *graphqlDataSourceGenerator) Generate(dsID string, config graphql_datasource.Configuration, httpClient *http.Client, options ...DataSourceGeneratorOption) (plan.DataSource, error) {
extractor := NewLocalTypeFieldExtractor(d.document)
rootNodes, childNodes := extractor.GetAllNodes()
definedOptions := &dataSourceGeneratorOptions{
streamingClient: &http.Client{Timeout: 0},
subscriptionType: SubscriptionTypeUnknown,
subscriptionClientFactory: &graphql_datasource.DefaultSubscriptionClientFactory{},
}
for _, option := range options {
option(definedOptions)
}
subscriptionClient, err := d.generateSubscriptionClient(httpClient, definedOptions)
if err != nil {
return nil, err
}
factory, err := graphql_datasource.NewFactory(
d.engineCtx,
httpClient,
subscriptionClient,
)
if err != nil {
return nil, err
}
return plan.NewDataSourceConfiguration[graphql_datasource.Configuration](
dsID,
factory,
&plan.DataSourceMetadata{
RootNodes: rootNodes,
ChildNodes: childNodes,
},
config,
)
}
func (d *graphqlDataSourceGenerator) generateSubscriptionClient(httpClient *http.Client, definedOptions *dataSourceGeneratorOptions) (graphql_datasource.GraphQLSubscriptionClient, error) {
var graphqlSubscriptionClient graphql_datasource.GraphQLSubscriptionClient
switch definedOptions.subscriptionType {
case SubscriptionTypeGraphQLTransportWS:
graphqlSubscriptionClient = definedOptions.subscriptionClientFactory.NewSubscriptionClient(
httpClient,
definedOptions.streamingClient,
nil,
graphql_datasource.WithWSSubProtocol(graphql_datasource.ProtocolGraphQLTWS),
)
default:
// for compatibility reasons we fall back to graphql-ws protocol
graphqlSubscriptionClient = definedOptions.subscriptionClientFactory.NewSubscriptionClient(
httpClient,
definedOptions.streamingClient,
nil,
graphql_datasource.WithWSSubProtocol(graphql_datasource.ProtocolGraphQLWS),
)
}
ok := graphql_datasource.IsDefaultGraphQLSubscriptionClient(graphqlSubscriptionClient)
if !ok {
return nil, errors.New("invalid subscriptionClient was instantiated")
}
return graphqlSubscriptionClient, nil
}
type graphqlFieldConfigurationsGenerator struct {
schema *graphql.Schema
}
func newGraphQLFieldConfigsGenerator(schema *graphql.Schema) *graphqlFieldConfigurationsGenerator {
return &graphqlFieldConfigurationsGenerator{
schema: schema,
}
}
func (g *graphqlFieldConfigurationsGenerator) Generate(predefinedFieldConfigs ...plan.FieldConfiguration) plan.FieldConfigurations {
var planFieldConfigs plan.FieldConfigurations
if len(predefinedFieldConfigs) > 0 {
planFieldConfigs = predefinedFieldConfigs
}
generatedArgs := g.schema.GetAllFieldArguments(graphql.NewSkipReservedNamesFunc())
generatedArgsAsLookupMap := CreateTypeFieldArgumentsLookupMap(generatedArgs)
g.engineConfigArguments(&planFieldConfigs, generatedArgsAsLookupMap)
return planFieldConfigs
}
func (g *graphqlFieldConfigurationsGenerator) engineConfigArguments(fieldConfs *plan.FieldConfigurations, generatedArgs map[TypeFieldLookupKey]graphql.TypeFieldArguments) {
for i := range *fieldConfs {
if len(generatedArgs) == 0 {
return
}
lookupKey := CreateTypeFieldLookupKey((*fieldConfs)[i].TypeName, (*fieldConfs)[i].FieldName)
currentArgs, exists := generatedArgs[lookupKey]
if !exists {
continue
}
(*fieldConfs)[i].Arguments = g.createArgumentConfigurationsForArgumentNames(currentArgs.ArgumentNames)
delete(generatedArgs, lookupKey)
}
for _, genArgs := range generatedArgs {
*fieldConfs = append(*fieldConfs, plan.FieldConfiguration{
TypeName: genArgs.TypeName,
FieldName: genArgs.FieldName,
Arguments: g.createArgumentConfigurationsForArgumentNames(genArgs.ArgumentNames),
})
}
}
func (g *graphqlFieldConfigurationsGenerator) createArgumentConfigurationsForArgumentNames(argumentNames []string) plan.ArgumentsConfigurations {
argConfs := plan.ArgumentsConfigurations{}
for _, argName := range argumentNames {
argConf := plan.ArgumentConfiguration{
Name: argName,
SourceType: plan.FieldArgumentSource,
}
argConfs = append(argConfs, argConf)
}
return argConfs
}