@apollo/client/core#Observable TypeScript Examples

The following examples show how to use @apollo/client/core#Observable. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: api.service.ts    From etherspot-sdk with MIT License 6 votes vote down vote up 
subscribe<T extends {}>(query: DocumentNode, options?: ApiRequestOptions<T>): Observable<T> {
    const {
      omitChainIdVariable, //
      variables,
      models,
    } = options;

    return this.apolloClient
      .subscribe<T>({
        query,
        variables: this.prepareApiVariables(variables, omitChainIdVariable),
      })

      .map(({ data }) => mapApiResult(data, models));
  }
Example #2
Source File: index.ts    From graphql-mesh with MIT License 5 votes vote down vote up 
function createMeshApolloRequestHandler(options: MeshApolloRequestHandlerOptions): RequestHandler {
  return function meshApolloRequestHandler(operation: Operation): Observable<FetchResult> {
    const operationAst = getOperationAST(operation.query, operation.operationName);
    if (!operationAst) {
      throw new Error('GraphQL operation not found');
    }
    const operationFn = operationAst.operation === 'subscription' ? options.subscribe : options.execute;
    return new Observable(observer => {
      Promise.resolve()
        .then(async () => {
          const results = await operationFn(
            operation.query,
            operation.variables,
            operation.getContext(),
            ROOT_VALUE,
            operation.operationName
          );
          if (isAsyncIterable(results)) {
            for await (const result of results) {
              if (observer.closed) {
                return;
              }
              observer.next(result);
            }
            observer.complete();
          } else {
            if (!observer.closed) {
              observer.next(results);
              observer.complete();
            }
          }
        })
        .catch(error => {
          if (!observer.closed) {
            observer.error(error);
          }
        });
    });
  };
}