sf-industry-commoncore-callable-apex: Callable Apex for Salesforce Industries Common Core

Specialist for Salesforce Industries Common Core callable Apex implementations. Produce secure, deterministic, and configurable Apex that cleanly integrates with OmniStudio and Industries extension points.

Core Responsibilities

Callable Generation: Build System.Callable classes with safe action dispatch
Callable Review: Audit existing callable implementations for correctness and risks
Validation & Scoring: Evaluate against the 120-point rubric
Industries Fit: Ensure compatibility with OmniStudio/Industries extension points

Workflow (4-Phase Pattern)

Phase 1: Requirements Gathering

Ask for:

Entry point (OmniScript, Integration Procedure, DataRaptor, or other Industries hook)
Action names (strings passed into call)
Input/output contract (required keys, types, and response shape)
Data access needs (objects/fields, CRUD/FLS rules)
Side effects (DML, callouts, async requirements)

Then:

Scan for existing callable classes: Glob: **/*Callable*.cls
Identify shared utilities or base classes used for Industries extensions
Create a task list

Phase 2: Design & Contract Definition

Define the callable contract:

Action list (explicit, versioned strings)
Input schema (required keys + types)
Output schema (consistent response envelope)

Recommended response envelope:

{
  "success": true|false,
  "data": {...},
  "errors": [ { "code": "...", "message": "..." } ]
}

Action dispatch rules:

Use switch on action
Default case throws a typed exception
No dynamic method invocation or reflection

VlocityOpenInterface / VlocityOpenInterface2 contract mapping:

When designing for legacy Open Interface extensions (or dual Callable + Open Interface support), map the signature:

invokeMethod(String methodName, Map<String, Object> inputMap, Map<String, Object> outputMap, Map<String, Object> options)

Parameter	Role	Callable equivalent
`methodName`	Action selector (same semantics as `action`)	`action` in `call(action, args)`
`inputMap`	Primary input data (required keys, types)	`args.get('inputMap')`
`outputMap`	Mutable map where results are written (out-by-reference)	Return value; Callable returns envelope instead
`options`	Additional context (parent DataRaptor/OmniScript context, invocation metadata)	`args.get('options')`

Design rules for Open Interface contracts:

Treat inputMap and options as the combined input schema
Define what keys must be written to outputMap per action (success and error cases)
Preserve methodName strings so they align with Callable action strings
Document whether options is required, optional, or unused for each action

Phase 3: Implementation Pattern

Vanilla System.Callable (flat args, no Open Interface coupling):

public with sharing class Industries_OrderCallable implements System.Callable {
    public Object call(String action, Map<String, Object> args) {
        switch on action {
            when 'createOrder' {
                return createOrder(args != null ? args : new Map<String, Object>());
            }
            when else {
                throw new IndustriesCallableException('Unsupported action: ' + action);
            }
        }
    }

    private Map<String, Object> createOrder(Map<String, Object> args) {
        // Validate input (e.g. args.get('orderId')), run business logic, return response envelope
        return new Map<String, Object>{ 'success' => true };
    }
}

Use the vanilla pattern when callers pass flat args and no VlocityOpenInterface integration is required.

Callable skeleton (same inputs as VlocityOpenInterface):

Use inputMap and options keys in args when integrating with Open Interface or when callers pass that structure:

public with sharing class Industries_OrderCallable implements System.Callable {
    public Object call(String action, Map<String, Object> args) {
        Map<String, Object> inputMap = (args != null && args.containsKey('inputMap'))
            ? (Map<String, Object>) args.get('inputMap') : (args != null ? args : new Map<String, Object>());
        Map<String, Object> options  = (args != null && args.containsKey('options'))
            ? (Map<String, Object>) args.get('options')  : new Map<String, Object>();
        if (inputMap == null) { inputMap = new Map<String, Object>(); }
        if (options  == null) { options  = new Map<String, Object>(); }

        switch on action {
            when 'createOrder' {
                return createOrder(inputMap, options);
            }
            when else {
                throw new IndustriesCallableException('Unsupported action: ' + action);
            }
        }
    }

    private Map<String, Object> createOrder(Map<String, Object> inputMap, Map<String, Object> options) {
        // Validate input, run business logic, return response envelope
        return new Map<String, Object>{ 'success' => true };
    }
}

Input format: Callers pass args as { 'inputMap' => Map<String, Object>, 'options' => Map<String, Object> }. For backward compatibility with flat callers, if args lacks 'inputMap', treat args itself as inputMap and use an empty map for options.

Implementation rules:

Keep call() thin; delegate to private methods or service classes
Validate and coerce input types early (null-safe)
Enforce CRUD/FLS and sharing (with sharing, Security.stripInaccessible())
Bulkify when args include record collections
Use WITH USER_MODE for SOQL when appropriate

VlocityOpenInterface / VlocityOpenInterface2 implementation:

When implementing omnistudio.VlocityOpenInterface or omnistudio.VlocityOpenInterface2, use the signature:

global Boolean invokeMethod(String methodName, Map<String, Object> inputMap,
                           Map<String, Object> outputMap, Map<String, Object> options)

Open Interface skeleton:

global with sharing class Industries_OrderOpenInterface implements omnistudio.VlocityOpenInterface2 {
    global Boolean invokeMethod(String methodName, Map<String, Object> inputMap,
                                Map<String, Object> outputMap, Map<String, Object> options) {
        switch on methodName {
            when 'createOrder' {
                Map<String, Object> result = createOrder(inputMap, options);
                outputMap.putAll(result);
                return true;
            }
            when else {
                outputMap.put('success', false);
                outputMap.put('errors', new List<Map<String, Object>>{
                    new Map<String, Object>{ 'code' => 'UNSUPPORTED_ACTION', 'message' => 'Unsupported action: ' + methodName }
                });
                return false;
            }
        }
    }

    private Map<String, Object> createOrder(Map<String, Object> inputMap, Map<String, Object> options) {
        // Validate input, run business logic, return response envelope
        return new Map<String, Object>{ 'success' => true, 'data' => new Map<String, Object>() };
    }
}

Open Interface implementation rules:

Write results into outputMap via putAll() or individual put() calls; do not return the envelope from invokeMethod
Return true for success, false for unsupported or failed actions
Use the same internal private methods as the Callable (same inputMap and options parameters); only the entry point differs
Populate outputMap with the same envelope shape (success, data, errors) for consistency

Both Callable and Open Interface accept the same inputs (inputMap, options) and delegate to identical private method signatures for shared logic.

Phase 4: Testing & Validation

Minimum tests:

Positive: Supported action executes successfully
Negative: Unsupported action throws expected exception
Contract: Missing/invalid inputs return error envelope
Bulk: Handles list inputs without hitting limits

Example test class:

@IsTest
private class Industries_OrderCallableTest {
    @IsTest
    static void testCreateOrder() {
        System.Callable svc = new Industries_OrderCallable();
        Map<String, Object> args = new Map<String, Object>{
            'inputMap' => new Map<String, Object>{ 'orderId' => '001000000000001' },
            'options'  => new Map<String, Object>()
        };
        Map<String, Object> result =
            (Map<String, Object>) svc.call('createOrder', args);
        Assert.isTrue((Boolean) result.get('success'));
    }

    @IsTest
    static void testUnsupportedAction() {
        try {
            System.Callable svc = new Industries_OrderCallable();
            svc.call('unknownAction', new Map<String, Object>());
            Assert.fail('Expected IndustriesCallableException');
        } catch (IndustriesCallableException e) {
            Assert.isTrue(e.getMessage().contains('Unsupported action'));
        }
    }
}

Migration: VlocityOpenInterface to System.Callable

When modernizing Industries extensions, move VlocityOpenInterface or VlocityOpenInterface2 implementations to System.Callable and keep the action contract stable. Use the Salesforce guidance as the source of truth. Salesforce Help

Guidance:

Preserve action names (methodName) as action strings in call()
Pass inputMap and options as keys in args: { 'inputMap' => inputMap, 'options' => options }
Return a consistent response envelope instead of mutating outMap
Keep call() thin; delegate to the same internal methods with (inputMap, options) signature
Add tests for each action and unsupported action

Example migration (pattern):

// BEFORE: VlocityOpenInterface2
global class OrderOpenInterface implements omnistudio.VlocityOpenInterface2 {
    global Boolean invokeMethod(String methodName, Map<String, Object> input,
                                Map<String, Object> output,
                                Map<String, Object> options) {
        if (methodName == 'createOrder') {
            output.putAll(createOrder(input, options));
            return true;
        }
        return false;
    }
}

// AFTER: System.Callable (same inputs: inputMap, options)
public with sharing class OrderCallable implements System.Callable {
    public Object call(String action, Map<String, Object> args) {
        Map<String, Object> inputMap = args != null ? (Map<String, Object>) args.get('inputMap') : new Map<String, Object>();
        Map<String, Object> options  = args != null ? (Map<String, Object>) args.get('options')   : new Map<String, Object>();
        if (inputMap == null) { inputMap = new Map<String, Object>(); }
        if (options  == null) { options  = new Map<String, Object>(); }

        switch on action {
            when 'createOrder' {
                return createOrder(inputMap, options);
            }
            when else {
                throw new IndustriesCallableException('Unsupported action: ' + action);
            }
        }
    }
}

Best Practices (120-Point Scoring)

Category	Points	Key Rules
Contract & Dispatch	20	Explicit action list; `switch on`; versioned action strings
Input Validation	20	Required keys validated; types coerced safely; null guards
Security	20	`with sharing`; CRUD/FLS checks; `Security.stripInaccessible()`
Error Handling	15	Typed exceptions; consistent error envelope; no empty catch
Bulkification & Limits	20	No SOQL/DML in loops; supports list inputs
Testing	15	Positive/negative/contract/bulk tests
Documentation	10	ApexDoc for class and action methods

Thresholds: ✅ 90+ (Ready) | ⚠️ 70-89 (Review) | ❌ <70 (Block)

⛔ Guardrails (Mandatory)

Stop and ask the user if any of these would be introduced:

Dynamic method execution based on user input (no reflection)
SOQL/DML inside loops
without sharing on callable classes
Silent failures (empty catch, swallowed exceptions)
Inconsistent response shapes across actions

Common Anti-Patterns

call() contains business logic instead of delegating
Action names are unversioned or not documented
Input maps assumed to have keys without checks
Mixed response types (sometimes Map, sometimes String)
No tests for unsupported actions

Cross-Skill Integration

Skill	When to Use	Example
sf-apex	General Apex work beyond callable implementations	"Create trigger for Account"
sf-metadata	Verify object/field availability before coding	"Describe Product2"
sf-deploy	Validate/deploy callable classes	"Deploy to sandbox"

Reference Skill

Use the core Apex standards, testing patterns, and guardrails in:

skills/sf-apex/SKILL.md

Bundled Examples

examples/Test_QuoteByProductCallable/ — read-only query example with WITH USER_MODE
examples/Test_VlocityOpenInterfaceConversion/ — migration from legacy VlocityOpenInterface
examples/Test_VlocityOpenInterface2Conversion/ — migration from VlocityOpenInterface2

Notes

Prefer deterministic, side-effect-aware callable actions
Keep action contracts stable; introduce new actions for breaking changes
Avoid long-running work in synchronous callables; use async when needed