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The CDK Construct Library for AWS::AppSync

Project description

AWS AppSync Construct Library

---

Stability: Experimental

This is a developer preview (public beta) module.

All classes with the Cfn prefix in this module (CFN Resources) are auto-generated from CloudFormation. They are stable and safe to use.

However, all other classes, i.e., higher level constructs, are under active development and subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.


This module is part of the AWS Cloud Development Kit project.

Usage Example

Given the following GraphQL schema file schema.graphql:

type Customer {
    id: String!
    name: String!
}

input SaveCustomerInput {
    name: String!
}

type Order {
    customer: String!
    order: String!
}

type Query {
    getCustomers: [Customer]
    getCustomer(id: String): Customer
}

input FirstOrderInput {
    product: String!
    quantity: Int!
}

type Mutation {
    addCustomer(customer: SaveCustomerInput!): Customer
    saveCustomer(id: String!, customer: SaveCustomerInput!): Customer
    removeCustomer(id: String!): Customer
    saveCustomerWithFirstOrder(customer: SaveCustomerInput!, order: FirstOrderInput!, referral: String): Order
}

the following CDK app snippet will create a complete CRUD AppSync API:

# Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
class ApiStack(Stack):
    def __init__(self, scope, id):
        super().__init__(scope, id)

        user_pool = UserPool(self, "UserPool",
            sign_in_type=SignInType.USERNAME
        )

        api = GraphQLApi(self, "Api",
            name="demoapi",
            log_config={
                "field_log_level": FieldLogLevel.ALL
            },
            authorization_config={
                "default_authorization": {
                    "user_pool": user_pool,
                    "default_action": UserPoolDefaultAction.ALLOW
                },
                "additional_authorization_modes": [{
                    "api_key_desc": "My API Key"
                }
                ]
            },
            schema_definition_file="./schema.graphql"
        )

        customer_table = Table(self, "CustomerTable",
            billing_mode=BillingMode.PAY_PER_REQUEST,
            partition_key={
                "name": "id",
                "type": AttributeType.STRING
            }
        )
        customer_dS = api.add_dynamo_db_data_source("Customer", "The customer data source", customer_table)
        customer_dS.create_resolver(
            type_name="Query",
            field_name="getCustomers",
            request_mapping_template=MappingTemplate.dynamo_db_scan_table(),
            response_mapping_template=MappingTemplate.dynamo_db_result_list()
        )
        customer_dS.create_resolver(
            type_name="Query",
            field_name="getCustomer",
            request_mapping_template=MappingTemplate.dynamo_db_get_item("id", "id"),
            response_mapping_template=MappingTemplate.dynamo_db_result_item()
        )
        customer_dS.create_resolver(
            type_name="Mutation",
            field_name="addCustomer",
            request_mapping_template=MappingTemplate.dynamo_db_put_item(
                PrimaryKey.partition("id").auto(),
                Values.projecting("customer")),
            response_mapping_template=MappingTemplate.dynamo_db_result_item()
        )
        customer_dS.create_resolver(
            type_name="Mutation",
            field_name="saveCustomer",
            request_mapping_template=MappingTemplate.dynamo_db_put_item(
                PrimaryKey.partition("id").is("id"),
                Values.projecting("customer")),
            response_mapping_template=MappingTemplate.dynamo_db_result_item()
        )
        customer_dS.create_resolver(
            type_name="Mutation",
            field_name="saveCustomerWithFirstOrder",
            request_mapping_template=MappingTemplate.dynamo_db_put_item(
                PrimaryKey.partition("order").auto().sort("customer").is("customer.id"),
                Values.projecting("order").attribute("referral").is("referral")),
            response_mapping_template=MappingTemplate.dynamo_db_result_item()
        )
        customer_dS.create_resolver(
            type_name="Mutation",
            field_name="removeCustomer",
            request_mapping_template=MappingTemplate.dynamo_db_delete_item("id", "id"),
            response_mapping_template=MappingTemplate.dynamo_db_result_item()
        )

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