// Invocable Apex — Bridge between Flow and Apex // 1. Invocable Method — Called from Flow public class FlowActions { // Single action called from Flow @InvocableMethod( label='Send Custom Notification' description='Sends a custom notification to specified users' category='Notifications' ) public static List sendNotification(List requests) { List results = new List(); for (Request req : requests) { try { // Build notification Messaging.CustomNotification notification = new Messaging.CustomNotification(); notification.setTitle(req.title); notification.setBody(req.body); notification.setNotificationTypeId(getNotificationTypeId()); notification.setTargetId(req.targetRecordId); // Send to recipients notification.send(new Set{req.recipientId}); Result res = new Result(); res.isSuccess = true; res.message = 'Notification sent successfully'; results.add(res); } catch (Exception e) { Result res = new Result(); res.isSuccess = false; res.message = e.getMessage(); results.add(res); } } return results; } // Input parameters (from Flow) public class Request { @InvocableVariable(required=true label='Notification Title') public String title; @InvocableVariable(required=true label='Notification Body') public String body; @InvocableVariable(required=true label='Target Record ID') public Id targetRecordId; @InvocableVariable(required=true label='Recipient User ID') public Id recipientId; } // Output parameters (back to Flow) public class Result { @InvocableVariable(label='Success') public Boolean isSuccess; @InvocableVariable(label='Message') public String message; } private static Id getNotificationTypeId() { return [ SELECT Id FROM CustomNotificationType WHERE DeveloperName = 'Custom_Alert' LIMIT 1 ].Id; } } // 2. Invocable Method for complex calculations public class FlowCalculations { @InvocableMethod( label='Calculate Revenue Forecast' description='Calculates revenue forecast based on pipeline' category='Calculations' ) public static List calculateForecast(List requests) { List results = new List(); for (ForecastRequest req : requests) { // Complex calculation that would be painful in Flow List pipeline = [ SELECT Amount, Probability, StageName FROM Opportunity WHERE AccountId = :req.accountId AND IsClosed = false AND CloseDate <= :req.forecastEndDate ]; Decimal weighted = 0; Decimal bestCase = 0; for (Opportunity opp : pipeline) { if (opp.Amount != null && opp.Probability != null) { weighted += opp.Amount * (opp.Probability / 100); bestCase += opp.Amount; } } ForecastResult result = new ForecastResult(); result.weightedForecast = weighted; result.bestCaseForecast = bestCase; result.pipelineCount = pipeline.size(); results.add(result); } return results; } public class ForecastRequest { @InvocableVariable(required=true label='Account ID') public Id accountId; @InvocableVariable(required=true label='Forecast End Date') public Date forecastEndDate; } public class ForecastResult { @InvocableVariable(label='Weighted Forecast') public Decimal weightedForecast; @InvocableVariable(label='Best Case Forecast') public Decimal bestCaseForecast; @InvocableVariable(label='Pipeline Count') public Integer pipelineCount; } } // 3. Custom Flow Screen Component (LWC) // flowDataTable.js — Custom LWC for use in Screen Flows // import { LightningElement, api } from 'lwc'; // export default class FlowDataTable extends LightningElement { // @api tableData; // Input from Flow // @api selectedRecords; // Output to Flow // // columns = [ // { label: 'Name', fieldName: 'Name' }, // { label: 'Industry', fieldName: 'Industry' }, // { label: 'Revenue', fieldName: 'AnnualRevenue', type: 'currency' } // ]; // // handleRowSelection(event) { // this.selectedRecords = event.detail.selectedRows; // // Dispatch FlowAttributeChangeEvent to update Flow variable // this.dispatchEvent(new FlowAttributeChangeEvent( // 'selectedRecords', this.selectedRecords // )); // } // }

Phase 11: Declarative Development & Flows

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Flows Architecture & Best Practices

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