Implemented bulkified Queueable Apex version for after update

force-app/main/default/classes/ContactTriggerHandler.cls

@@ -35,7 +35,7 @@ public with sharing class ContactTriggerHandler extends TriggerHandler {
             if (cont.DummyJSON_Id__c == null) {
                 cont.DummyJSON_Id__c = String.valueOf(Math.round(Math.random() * 100));
             }
-            if (Integer.valueOf(cont.DummyJSON_Id__c) <= 100 && !System.isFuture()) {
+            if (Integer.valueOf(cont.DummyJSON_Id__c) <= 100 && !System.isFuture() && !System.isQueueable()) {
                 DummyJSONCallout.getDummyJSONUserFromId(cont.DummyJSON_Id__c);
             }
         }
@@ -48,10 +48,15 @@ public with sharing class ContactTriggerHandler extends TriggerHandler {
 	 * if DummyJSON_Id__c is greater than 100, call the postCreateDummyJSONUser API
      */
     public override void afterUpdate() {
-        for (Contact cont : newConts) {
-            if (Integer.valueOf(cont.DummyJSON_Id__c) > 100 && !System.isFuture()) {
-                DummyJSONCallout.postCreateDummyJSONUser(cont.Id);
+        if (!System.isQueueable() && !System.isFuture()) {
+            Map<Id, Contact> contsById = new Map<Id, Contact>();
+            for (Contact cont : newConts) {
+                if (Integer.valueOf(cont.DummyJSON_Id__c) > 100) {
+                    // DummyJSONCallout.postCreateDummyJSONUser(cont.Id);
+                    contsById.put(cont.Id, cont);
+                }
             }
+            System.enqueueJob(new PostDummyJSONUserQueueable(contsById));
         }
     }
 }

force-app/main/default/classes/DummyJSONCallout.cls

@@ -111,31 +111,30 @@ public with sharing class DummyJSONCallout {
      * 
      * @param contactId The Salesforce Contact ID used to generate the JSON payload for the external system.
      */
-	@future(callout = true)
-	public static void postCreateDummyJSONUser(String contactId) {
-		// Create HTTP request to send.
-		HttpRequest request = new HttpRequest();
-		// Set the endpoint URL. Use direct URL or for best practices use Named Credential.
-		request.setEndpoint('callout:DummyJsonUser/add');
-		// Set the HTTP method to POST.
-		request.setMethod('POST');
-		// Set the body using generateDummyJsonUserPayload method.
-		// String jsonBody = generateDummyJsonUserPayload();
-		// if (jsonBody.length() > 0) 
-		request.setBody(generateDummyJsonUserPayload(contactId));
-
-		// Send the HTTP request and get the response.
-		Http http = new Http();
-		HttpResponse response = http.send(request);
-		// If the HTTP response code is successful, update the contact.
-		if (response.getStatusCode() >= 200 || response.getStatusCode() <= 299) {
-			Contact cont = [
-				SELECT Id, DummyJSON_Last_Updated__c 
-				FROM Contact 
-				WHERE Id = :contactId];
-			cont.DummyJSON_Last_Updated__c = Datetime.now();
-			update cont;
+
+	public static List<Id> postCreateDummyJSONUser(Set<Id> contactIds) {
+		Map<Id, String> jsonById = generateDummyJsonUserPayload(contactIds);
+
+		List<Id> contactIsToUpdate = new List<Id>();
+		for (Id contId : contactIds) {
+			// Create HTTP request to send.
+			HttpRequest request = new HttpRequest();
+			// Set the endpoint URL. Use direct URL or for best practices use Named Credential.
+			request.setEndpoint('callout:DummyJsonUser/add');
+			// Set the HTTP method to POST.
+			request.setMethod('POST');
+			// Set the body using generateDummyJsonUserPayload method. 
+			request.setBody(jsonById.get(contId));
+
+			// Send the HTTP request and get the response.
+			Http http = new Http();
+			HttpResponse response = http.send(request);
+			// If the HTTP response code is successful, update the contact.
+			if (response.getStatusCode() >= 200 || response.getStatusCode() <= 299) {
+				contactIsToUpdate.add(contId);
+			}
 		}
+		return contactIsToUpdate;
 	}
 
 	/*
@@ -154,25 +153,30 @@ public with sharing class DummyJSONCallout {
      * @return String The JSON string payload that represents the Contact's details.
      */
 	@TestVisible // Allows test class to see this method. Since it is private, it would not be visible otherwise.
-	private static String generateDummyJsonUserPayload(String contactId) {
+	private static Map<Id, String> generateDummyJsonUserPayload(Set<Id> contactIds) {
 		// Query the contact to get the field values to generate the JSON payload.
-		Contact cont = [
+		List<Contact> contacts = [
 			SELECT Id, FirstName, LastName, Email, Phone, DummyJSON_Id__c
 			FROM Contact
-			WHERE Id = :contactId
+			WHERE Id IN :contactIds
 		];
-		// Create a map of the field values.
-		Map<String, Object> valuesMap = new Map<String, Object>();
-		valuesMap.put('salesforceId', contactId);
-		valuesMap.put('firstName', String.isNotBlank(cont.FirstName) ? cont.FirstName : 'unknown');
-		valuesMap.put('lastName', String.isNotBlank(cont.LastName) ? cont.LastName : 'unknown');
-		valuesMap.put('email', String.isNotBlank(cont.Email) ? cont.Email : 'unknown');
-		valuesMap.put('phone', String.isNotBlank(cont.Phone) ? cont.Phone : 'unknown');
-		// Serialize the map into a JSON string.
-		String json = JSON.serialize(valuesMap);
+		Map<Id, String> jsonById = new Map<Id, String>();
+		for (Contact cont : contacts) {
+			// Create a map of the field values.
+			Map<String, Object> valuesMap = new Map<String, Object>();
+			valuesMap.put('salesforceId', String.valueOf(cont.Id));
+			valuesMap.put('firstName', String.isNotBlank(cont.FirstName) ? cont.FirstName : 'unknown');
+			valuesMap.put('lastName', String.isNotBlank(cont.LastName) ? cont.LastName : 'unknown');
+			valuesMap.put('email', String.isNotBlank(cont.Email) ? cont.Email : 'unknown');
+			valuesMap.put('phone', String.isNotBlank(cont.Phone) ? cont.Phone : 'unknown');
+			// Serialize the map into a JSON string.
+			String json = JSON.serialize(valuesMap);
+			jsonById.put(cont.Id, json);
+		}
+
 		// Make sure to check that required contacts fields have a value. Default the value to unknown if it does not exists.
 		// Integration data can change over time. It is a best practice to add safeguards/validation to ensure the integration does not break.
 
-		return json;
+		return jsonById;
 	}
 }

force-app/main/default/classes/DummyJSONCalloutTest.cls

@@ -66,13 +66,18 @@ public with sharing class DummyJSONCalloutTest {
 			Phone = '+123456789'
 		);
 		insert testContact;
+		// Suvorova
+		Map<Id, Contact> contsById = new Map<Id, Contact>();
+		contsById.put(testContact.Id, testContact);
 
 		// Set the mock callout class
 		Test.setMock(HttpCalloutMock.class, new DummyJSONCalloutMockGenerator());
 
 		// As this is a future method, we need to enclose it in Test.startTest() and Test.stopTest() to ensure it's executed in the test context.
 		Test.startTest();
-		DummyJSONCallout.postCreateDummyJSONUser(testContact.Id);
+		// Suvorova
+		// DummyJSONCallout.postCreateDummyJSONUser(testContact.Id);
+		System.enqueueJob(new PostDummyJSONUserQueueable(contsById));
 		Test.stopTest();
 
 		// Retrieve the updated contact to verify the changes
@@ -97,9 +102,15 @@ public with sharing class DummyJSONCalloutTest {
 			DummyJSON_Id__c = '101'
 		);
 		insert testContact;
+		// Suvorova
+		Set<Id> contactIds = new Set<Id>();
+		contactIds.add(testContact.Id);
 
 		// Call the method
-		String payload = DummyJSONCallout.generateDummyJsonUserPayload(testContact.Id);
+		// Suvorova
+		// String payload = DummyJSONCallout.generateDummyJsonUserPayload(testContact.Id);
+		Map<Id, String> payloadById = DummyJSONCallout.generateDummyJsonUserPayload(contactIds);
+		String payload = payloadById.get(testContact.Id);
 
 		// Parse the generated JSON
 		Map<String, Object> payloadMap = (Map<String, Object>) JSON.deserializeUntyped(payload);

force-app/main/default/classes/PostDummyJSONUserQueueable.cls

@@ -0,0 +1,22 @@
+public class PostDummyJSONUserQueueable implements Queueable, Database.AllowsCallouts {
+
+    private Map<Id, Contact> contsById;
+
+    public PostDummyJSONUserQueueable(Map<Id, Contact> contactsById) {
+        this.contsById = contactsById;
+    }
+
+    public void execute(QueueableContext qc) {
+        List<Id> contactIdsForUpdate = DummyJSONCallout.postCreateDummyJSONUser(this.contsById.keySet());
+
+        List<Contact> contacts = [
+			SELECT Id, DummyJSON_Last_Updated__c 
+			FROM Contact 
+			WHERE Id IN :contactIdsForUpdate
+        ];
+        for (Contact cont : contacts) {
+            cont.DummyJSON_Last_Updated__c = Datetime.now();
+        }
+		Database.update(contacts);
+    }
+}

force-app/main/default/classes/PostDummyJSONUserQueueable.cls-meta.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>59.0</apiVersion>
+    <status>Active</status>
+</ApexClass>