Configuring rules define conditions based on which it is possible to determine whether a policy has to be executed or not at runtime.
For example, an XML to JSON policy can be applied only if the Accept Header is set as application/json.
The Add/Edit Rule button at the lower-right part of each Policy Configuration page allows the API author to add additional rules to a policy before a message is passed to a policy.
A sample snapshot of the Monetization Limit Check Policy Configuration page is provided below.
Figure 1: A sample Policy Configuration page with the Add/Edit Rule button
Click the Add/Edit Rule button to start configuring a rule.
Figure 2: Add/Edit Rule dialog box to configure rules
Adding a statement
To add a statement, perform the following actions in the Update Rule dialog box
- Click the Down arrow
- Click the New statement option.
Figure 3: Navigating to add new statement
Click the Edit Statement button. Edit the rule by changing the properties present in the dialog box.
Figure 3: "Add new statement" option to add more rules
Click OK and then click the Save button on top of the screen to apply the changes.
Specify the Message Part Identifier type. Specify the part of the message from where the policy needs to check and validate the condition or criteria specified. Options available are:
Select the flow variable from the list of options available in the drop-down list.
Choose the operator from the options below to form a condition:
|Value||Provide the value that is expected from the condition specified.|
Adding more statements
For using conditional statements using conjunctions in the rule, add the conjunction (OR/AND) that needs to be used between the statements and then add those statements.
- Click the Down arrow in the Update Rule section
- Click any one of the following:
- add conjunction
- or conjunction
Follow the steps in the Adding a statement section.