graphql-lazy-executor

GraphQL Lazy Executor

This executor pre validate and parse the query and returns a function which once executed, it returns a RxJS Observable with the result. Useful in high performance scenarios, once the query can be pre validated and parsed, and postpone the execution.

Api

	lazyExecutor(
		schema: GraphQLSchema, 
		requestString: string,
		customValidators?: GraphQLValidator | Array<GraphQLValidator>
		customExecutor?: function(/* args like http://graphql.org/graphql-js/execution/#execute*/): MaybePromise<ExecutionResult>;

Sample

	const {
	    GraphQLSchema,
	    GraphQLObjectType,
	    GraphQLString,
	    GraphQLInt
	} = require('graphql');

	const lazyExecutor = require('graphql-lazy-executor');

	const schema = new GraphQLSchema({
	    query: new GraphQLObjectType({
	        name: 'Query',
	        fields: {
	            name: {
	                type: GraphQLString,
	                args: {
	                    age: {
	                        type: GraphQLInt
	                    }
	                },
	                resolve: (root, {
	                    age
	                }, context, info) => {
	                    callback(root, context);

	                    return age ? `${root.name} - ${age}` : root.name;
	                }
	            },
	            dog: {
	                type: GraphQLString,
	                args: {
	                    age: {
	                        type: GraphQLInt
	                    }
	                },
	                resolve: (root, {
	                    age
	                }, context, info) => {
	                    return age ? `${root.dog} - ${age}` : root.dog;
	                }
	            }
	        }
	    }),
	});

	const nameDogQuery = lazyExecutor({
		schema, 
		source: `{name, dog}`
	});

    nameDogQuery({
			contextValue: {
				contextValue: 'contextValue'
			},
			rootValue: {
				name: 'Rohde',
				dog: 'Heron'
			},
			variableValues: {
				variableValues: 'variableValues'
			}
		})
        .then(console.log);

        // will print
        {
        	data: {
                name: 'Rohde',
                dog: 'Heron'
            }
        }