Rules

In Quantum Fabric, Rules are snippets of business logic that are written by using MVEL. The rules can be defined as part of a Ruleset on the Quantum Fabric Console.

After you publish a Ruleset as part of a Fabric app, you can use the Rules section on the App Services console to test the rules in a run-time environment. For more information, refer to Rules as a Service.

To view the rulesets that are published from Fabric, click Rules from the left pane of the App Services console.

The following fields are displayed for each ruleset:

Column	Description
Rules Service Name	The name of the ruleset that is deployed to the app server.
Versions	The version number that is selected while creating the ruleset. You can click the drop-down list to view the different versions of the selected ruleset. For more information on versioning, refer to API Versioning.
Rule	The rules that are configured in the ruleset. You can select a rule from the drop-down list to test the rule.
Throttling	Throttling is an interim state, and is used to control the rate of requests which clients can make to an API.
Documentation	Downloads the Swagger API file for the ruleset. For more information, refer Downloading a Swagger API file.

 

Testing a Rule

For the ruleset that you want to test, select a rule from the drop-down list in the Rule column.

The selected rule displays a page with two tabs:

• Request Input
• Response Output

Request Input

The Request Input page displays the input parameters for the selected rule. You need to provide values for the input parameters to get a response from the server.

The following fields are displayed in the Request Input page:

Field	Description
Server URL	The URL at which the request is posted. The rule that is selected from the drop-down list is automatically encoded in the server URL.
Rule Logic	The business logic (written in MVEL) of the rule that is selected. Contains the following tabs: Base Logic: Rule logic that is defined on the Quantum Fabric Console Customized Logic: Rule logic that is customized by a business administration app (such as Infinity Spotlight)
Body	Displays the Param Name and Param Value editor. You need to set a value for the parameter names that are displayed on the page.
Header	Displays the field name and value editor. You can give any string as the header name. Click the Add icon displayed above the table in Header toggle to add a new field. Click the Delete button across a row to delete the field.
Get Response	Fetches the response from the server URL based on the specified body and header parameters.

 

Response Output

The response received for the input request sent is displayed in the Response Output page. The page contains two sections:

•  Response Header
•  Response Body

Response Header: The response header section displays the key-value pairs from the header of the http response in a table.

Response Body: The response body section displays the key-value pairs from the body of the http response in a JSON format.

To test a rule, follow these steps:

1. Sign in to the App Services console, and then from the left pane, click Rules.
2. For the ruleset that you want to test, from the Rule column, select a rule from the drop-down list.
3. On the Request Input page, perform the following actions:
   1. On the Body tab, provide the Param Value for all the parameters.
   2. On the Header tab, provide the Field Name and Field Value, if applicable.
4. Click Get Response.

   Based on the input parameters, the Response Header and Response Body are displayed on the Response Output page.

Downloading a Swagger API File

Swagger is a standard way of defining and documenting APIs. An option to download the Swagger definition of the ruleset is provided in App Services.

To download the Swagger definition for a Ruleset in the App Services console, click the download icon: {...}.