AWS API Gateway adapter/integration Service

AWS API Gateway Adapter

AWS API Gateway is a new data adapter of Quantum Fabric integration services. With Quantum Fabric AWS API Gateway integration service, you can connect to the services configured and deployed under API Gateway Service in Amazon Web Services.

Quantum Fabric AWS API Gateway supports the following integration types of Amazon API Gateway:

Lambda Function
HTTP Proxy
Mock Integration
AWS Service Proxy

NOTE: Quantum Fabric supports AWS API Gateway services, which returns JSON response.

Configure AWS API Gateway Endpoint Adapter

To configure AWS API Gateway service in the Integration Service Definition tab, follow these steps:

In the Name field, provide a unique name for your service.
From the Service Type list, select AWS API Gateway.
Provide the following details in the AWS API Gateway service definiton:

Field	Description
Regions	Select your region that you have configured AWS API Gateway for your AWS account.
AWS URL	It displays the AWS API gateway URL for the selected region. You cannot modify this field.
Access Key ID	Enter the access key ID that you received from your AWS account.
Secret Access ID	Enter the secret access key ID that you received from your AWS account.
Test Connection	Click Test Connection to test you AWS connection details. The system displays `Valid Gateway address and port` if the details are correct.

For additional configuration of your service definition, provide the following details in the Advanced section:

Field Description

Custom Code

Field	Description
Custom Code	Custom Code enables you to specify dependent JAR. To specify dependent JAR, select the JAR containing preprocessor or postprocessor libraries from the drop-down list, or click Upload New to browse the JAR file from your local system. This step allows you to further filter the data sent to the back end. IMPORTANT: Make sure that you upload a custom JAR file that is built on the same JDK version used for installing Quantum Fabric Integration. For example, if the JDK version on the machine where Quantum Fabric Integration is installed is 1.6, you must use the same JDK version to build your custom jar files. If the JDK version is different, an unsupported class version error will appear when a service is used from a device.
Throttling	API throttling enables you to limit the number of request calls within a minute. If an API exceeds the throttling limit, it will not return the service response. To specify throttling in Quantum Fabric Console, follow these steps: In the Total Rate Limit text box, enter a required value. With this value, you can limit the number of requests configured in your Quantum Fabric console in terms of Total Rate Limit. In the Rate Limit Per IP text box, enter a required value. With this value, you can limit the number of IP address requests configured in your Quantum Fabric console in terms of Per IP Rate Limit. To override throttling in App Services Console, refer to Override API Throttling Configuration. NOTE: In case of On-premises, the number of nodes in a clustered environment is set by configuring the `KONY_SERVER_NUMBER_OF_NODES` property in the Admin Console. This property indicates the number of nodes configured in the cluster. The default value is 1. Refer to The Runtime Configuration tab on the Settings screen of App Services. The total limit set in the Quantum Fabric Console will be divided by the number of configured nodes. For example, a throttling limit of 600 requests/minute with three nodes will be calculated to be 200 requests/minute per node. This is applicable for Cloud and On-premises.

Custom Code enables you to specify dependent JAR.
To specify dependent JAR, select the JAR containing preprocessor or postprocessor libraries from the drop-down list, or click Upload New to browse the JAR file from your local system. This step allows you to further filter the data sent to the back end.

IMPORTANT: Make sure that you upload a custom JAR file that is built on the same JDK version used for installing Quantum Fabric Integration.

For example, if the JDK version on the machine where Quantum Fabric Integration is installed is 1.6, you must use the same JDK version to build your custom jar files. If the JDK version is different, an unsupported class version error will appear when a service is used from a device.

Throttling

API throttling enables you to limit the number of request calls within a minute. If an API exceeds the throttling limit, it will not return the service response.

To specify throttling in Quantum Fabric Console, follow these steps:
1. In the Total Rate Limit text box, enter a required value. With this value, you can limit the number of requests configured in your Quantum Fabric console in terms of Total Rate Limit.
2. In the Rate Limit Per IP text box, enter a required value. With this value, you can limit the number of IP address requests configured in your Quantum Fabric console in terms of Per IP Rate Limit.
To override throttling in App Services Console, refer to Override API Throttling Configuration.

NOTE: In case of On-premises, the number of nodes in a clustered environment is set by configuring the KONY_SERVER_NUMBER_OF_NODES property in the Admin Console. This property indicates the number of nodes configured in the cluster. The default value is 1.
Refer to The Runtime Configuration tab on the Settings screen of App Services.

The total limit set in the Quantum Fabric Console will be divided by the number of configured nodes. For example, a throttling limit of 600 requests/minute with three nodes will be calculated to be 200 requests/minute per node.
This is applicable for Cloud and On-premises.

NOTE: All options in the Advanced section are optional.

In the Description field, provide a suitable description for the service.
To enable the proxy, select the Use proxy from settings check box. By default, the check box is cleared.
The Use proxy from settings check box dims when no proxy is configured under the Settings > Proxy.
Click Save to save your service definition.

Create Operations for AWS API Gateway

The Operations List tab appears only after the service definition is saved.

NOTE: Click Operations List tab > Configure Operation. The Configured Operations list appears.

To create an operation, follow these steps:

Click SAVE & ADD OPERATION in your service definition page to save your service definition and display the NewOperation tab for adding operations.
OR
Click Add Operation to add a new operation or from the tree in the left pane, click Add > Add New Operation.
Click to View image
NOTE: To use an existing integration service, refer to How to Use an Existing Integration Service.

To create an operation, provide the following details:

Field	Description
API	From the drop down list, select an API that is deployed at Amazon Services.
Resource	Select the required resource from the drop down list.
Stages	Select the required stage from the drop down list.
Methods	Select the required method from the drop down list.
Add Operation	Click Add Operation to add the created operation in the Configured Operations Section. Operation names are auto-generated in the format. The default name format of a AWS API operation is `<method_name><api_name><resource_name>`. You can change the operation name if required.

Configure Operation for AWS API Gateway

Once you create operations for an AWS API Gateway service, you can configure operations as follows:

To edit an operation, either click on the required operation name or click Edit from the Contextual Menu in the Configured Operations screen. The operation details page is displayed.
Provide the following details in the operation details page:

Field	Description
Name	It is prepopulated with the operation name. You can change the name if required.
Operation Security Level	It specifies how a client must authenticate to invoke this operation. Select one of the following security operations in the Operation Security Level field. Authenticated App User – It restricts the access to clients who have successfully authenticated using an Identity Service associated with the app. Anonymous App User – It allows the access from trusted clients that have the required App Key and App Secret. Authentication through an Identity Service is not required. Public – It allows any client to invoke this operation without any authentication. This setting does not provide any security to invoke this operation and you should avoid this authentication type if possible. Private - It blocks the access to this operation from any external client. It allows invocation either from an Orchestration/Object Service, or from the custom code in the same run-time environment.

Field

Description

Name

It is prepopulated with the operation name. You can change the name if required.

Operation Security Level

It specifies how a client must authenticate to invoke this operation.

For additional configurations of request (or) response operations, provide the following details in the Advanced section:

Field	Description
Custom Code Invocation - Preprocessor and Postprocessor (for Java and JavaScript)	You can add pre and post processing logic to services to modify the request inputs. When you test, the services details of various stages in the service execution are presented to you for better debugging. All options in the Advanced section are optional. For more details, refer to Preprocessor and Postprocessor.
Properties	Additional configuration properties (timeout, cachable, unescape embedded xml in response, response encoding, number of connection retries allows you to configure service call time out cache response
Front End API	It allows you map your endpoint/back-end URL of an operation to a front-end URL.
Server Events	Using Server Events you can configure this service to trigger or process server side events. For detailed information, refer Server Events.

NOTE: All options in the Advanced section are optional.

Configure Request Operation for AWS API Gateway

Integration services accept only form-url-encoded inputs for all input parameters provided in service input parameters (request input).

You can perform the following actions in Request Input tab:

Click Add Parameter to add an entry (if the entries for input and the output tabs does not exist).
To make duplicate entries, select the check box for the entry, click Copy and Paste.
To delete an entry, select the check box for an entry and click Delete .
Under the Body tab, provide the following details:

Field	Description
Name	It Contains a Unique Identifier. Change the name if required.
Test Value	Enter a value. A test value is used for testing the service.
Default Value	Enter the value, if required. The default value will be used if the test value is empty.
Scope	Select Request or Session. It is set to Request by default. Request indicates that the value must be retrieved from the HTTP request received from the mobile device. Session indicates that the value must be retrieved from the HTTP session stored on Quantum Fabric.
Datatype	Select one of the following data types. String - A combination of alpha-numeric and special characters. Supports all formats including UTF-8 and UTF-16 with no maximum size limit. Date - Date format If data type is string, then the options in the Format Type are Currency, Number and Date. If the data type is number, then the options in the Format Type are Currency and Date. If the data type is boolean, then the options in the Format Type and Format Value text box are disabled. Boolean - A value that can be true or false. Number - An integer or a floating number. Collection - A group of data, also referred as data set.
Encode	Select the check box to enable encoding of an input parameter. For example, the name New York Times would be encoded as New%20York%20Times when the encoding is set to True. The encoding must also adhere to the HTML URL encoding standards.

Under the Header tab, provide the following details:
IMPORTANT: If AWS APIs with API Key Required is set to "true", the api key needs to be sent as request header as x-api-key.

Field	Description
Name	Provide custom HTTP headers required by the external source.
Scope	Select one of the following options. It is set to Request by default. Request: If this option is selected, the Integration Server picks the value pairs from the client's request during run time and forwards the value pairs to the back-end. The option helps a user to configure the default value. The default value is taken if the request does not have the header. Session: If this option is selected, the value of header is picked from the session context based on the user configuration. Constant: Constant is used to configure the value that is picked and sent to back end by the Integration Server during run time. Expression: Select this option to configure the velocity template expressions for the header values. NOTE: You cannot edit the default value for the expression.
Test Value	Enter a value. A test value is used for testing the service.
Default Value	Enter the value, if required. The default value will be used if the test value is empty.
Description	Provide a suitable description of the service.

To validate the operation details, click Save and Test. For more details, refer to Test a Service Operation.

Configure Response Operation for AWS API Gateway

In the Response Output tab, provide the following details:.
The Name field in the Response Output tab is prepopulated with properties of the output API.
Enter the values for required fields such as name, scope, data type, collection ID, record ID, format and format value.
NOTE: If you define parameters inside a record as a session, the session scope will not get reflected for the parameters.
To validate the operation details, click Save and Test. For more details, refer to Test a Service Operation.
Click Save Operation to save the operation. The system displays the Operation section for your service.
NOTE: You can view the service in the Data Panel feature of Quantum Visualizer. By using the Data Panel, you can link back-end data services to your application UI elements seamlessly with low-code to no code. For more information on Data Panel, click here.