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81 lines
3.1 KiB
TypeScript
81 lines
3.1 KiB
TypeScript
import { Maybe } from '../jsutils/Maybe';
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import { DocumentNode } from '../language/ast';
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import { ExecutionResult } from '../execution/execute';
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import { GraphQLSchema } from '../type/schema';
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import { GraphQLFieldResolver } from '../type/definition';
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export interface SubscriptionArgs {
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schema: GraphQLSchema;
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document: DocumentNode;
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rootValue?: any;
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contextValue?: any;
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variableValues?: Maybe<Record<string, any>>;
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operationName?: Maybe<string>;
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fieldResolver?: Maybe<GraphQLFieldResolver<any, any>>;
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subscribeFieldResolver?: Maybe<GraphQLFieldResolver<any, any>>;
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}
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/**
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* Implements the "Subscribe" algorithm described in the GraphQL specification.
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*
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* Returns a Promise which resolves to either an AsyncIterator (if successful)
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* or an ExecutionResult (client error). The promise will be rejected if a
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* server error occurs.
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*
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* If the client-provided arguments to this function do not result in a
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* compliant subscription, a GraphQL Response (ExecutionResult) with
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* descriptive errors and no data will be returned.
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*
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* If the the source stream could not be created due to faulty subscription
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* resolver logic or underlying systems, the promise will resolve to a single
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* ExecutionResult containing `errors` and no `data`.
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*
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* If the operation succeeded, the promise resolves to an AsyncIterator, which
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* yields a stream of ExecutionResults representing the response stream.
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*
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* Accepts either an object with named arguments, or individual arguments.
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*/
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export function subscribe(
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args: SubscriptionArgs,
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): Promise<AsyncIterableIterator<ExecutionResult> | ExecutionResult>;
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export function subscribe(
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schema: GraphQLSchema,
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document: DocumentNode,
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rootValue?: any,
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contextValue?: any,
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variableValues?: Maybe<{ [key: string]: any }>,
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operationName?: Maybe<string>,
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fieldResolver?: Maybe<GraphQLFieldResolver<any, any>>,
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subscribeFieldResolver?: Maybe<GraphQLFieldResolver<any, any>>,
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): Promise<AsyncIterableIterator<ExecutionResult> | ExecutionResult>;
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/**
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* Implements the "CreateSourceEventStream" algorithm described in the
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* GraphQL specification, resolving the subscription source event stream.
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*
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* Returns a Promise<AsyncIterable>.
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*
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* If the client-provided invalid arguments, the source stream could not be
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* created, or the resolver did not return an AsyncIterable, this function will
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* will throw an error, which should be caught and handled by the caller.
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*
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* A Source Event Stream represents a sequence of events, each of which triggers
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* a GraphQL execution for that event.
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*
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* This may be useful when hosting the stateful subscription service in a
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* different process or machine than the stateless GraphQL execution engine,
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* or otherwise separating these two steps. For more on this, see the
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* "Supporting Subscriptions at Scale" information in the GraphQL specification.
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*/
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export function createSourceEventStream(
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schema: GraphQLSchema,
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document: DocumentNode,
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rootValue?: any,
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contextValue?: any,
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variableValues?: { [key: string]: any },
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operationName?: Maybe<string>,
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fieldResolver?: Maybe<GraphQLFieldResolver<any, any>>,
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): Promise<AsyncIterable<any> | ExecutionResult>;
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