AsyncCondition Interface

Here’s an example implementation of the TxnSecurity.AsyncCondition interface. The transaction security policy triggers when a user logs in. In the example, ExternalValidation__c is a custom object that contains information from an external validation system. The result of the SOQL query on ExternalValidation__c determines whether to block the user from logging in. The policy then queues the CalloutToExternalValidator class for asynchronous execution. When it executes, the CalloutToExternalValidator class makes an external call to the validation system to update it with information about this log in event. Because CalloutToExternalValidator is triggered by Asynchronous Apex, you must implement the TxnSecurity.AsyncCondition interface in the ExternallyValidatedLoginCondition Apex class along with the usual TxnSecurity.EventCondition interface.

global class ExternallyValidatedLoginCondition implements TxnSecurity.EventCondition, TxnSecurity.AsyncCondition {
    public boolean evaluate(SObject event) {
        LoginEvent loginEvent = (LoginEvent) event;
        Boolean userBlocked = [select blocked from ExternalValidation__c where loginId = loginEvent.UserId][0].Blocked;
 
        System.enqueueJob(new CalloutToExternalValidator(loginEvent.SourceIp, loginEvent.LoginUrl));
        return userBlocked;
    }
}
 
public class CalloutToExternalValidator implements Queueable {
    private String sourceIp;
    private String loginUrl;
 
    public CalloutToExternalValidator(String sourceIp, String loginUrl) {
        this.sourceIp = sourceIp;
        this.loginUrl = loginUrl;
    }
 
    public void execute(QueueableContext context) {
        // callout to external validation service
        // pass sourceIp, loginUrl
                
        // update ExternalValidation__c
    }
}