Questions tagged [design-patterns]
A general reusable solution to a commonly occurring problem within a given context in software design
102
questions
1
vote
0answers
36 views
Dynamic class invocation in trigger - Callable Interface
Recently I was tasked with a project to dynamically call a class from a packaged trigger. This will also clients to hook into their custom logic instead of what is supplied as part of the package.
I ...
6
votes
1answer
141 views
Can single Trigger by object cause performance issues?
Context
There are a lot of questions and SF developer blogs related to best practices for trigger.
Since several years, I've been following the single trigger object pattern which has a lot of ...
2
votes
1answer
29 views
Can't create relationship with Account and Custom object when using FF Unit Of work
I working on a class that needs to insert several records and create relationships between them, mostly to the Account object.
I'm passing a deserialized JSON (WrapperRestZopaProviderRequest) to the ...
0
votes
1answer
14 views
How to prevent aucomponent table from growing in size so that it changes the size of the component?
Hidden Component 3 is a table (not lightning data table.)
It is fetched with some data-- but when the text gets too large (even with truncation), the entire component will grow with the table.
...
8
votes
1answer
102 views
How to opt out of FLS validation when a SOQL query is run by a trigger?
I have a large Salesforce application with hundreds of SOQL queries. Currently, the code uses Schema.DescribeFieldResult data to determine if the logged in user has rights to each field in the SELECT ...
3
votes
1answer
91 views
Dynamic Component creation in Lightning webcomponent
As for my analysis Not able to render dynamic Lightning Web Component Dynamic creation of the Lightning Web Components is not yet supported.
Can someone suggest a better approach to render the input ...
3
votes
1answer
41 views
Using Salesforce as Single Source of Truth [closed]
From a software architecture perspective, are there major issues with using Salesforce as an application's single source of truth (as opposed to a traditional relational database like Postgres)?
It ...
1
vote
2answers
53 views
Best Practice: dependency on data model names [closed]
BACKGROUND
I need to display some data from another system on a lightning component. Let's say I get a JSON string from the external system as following:
{
"initialStatus": "Active",
"name": "...
-1
votes
1answer
42 views
Apex-optimized algorithm for “road atlas city distance matrix” style utility data? [closed]
I'd like to automate a business process that currently involves a road-atlas-style "distance chart" as seen here.
When an employee is hand-reviewing records for deduplication, if a given "status" ...
4
votes
3answers
467 views
Platform Event Design when Subscribers are Apex Triggers
This is a general design question on how to structure trigger files for platform events. Say I publish a platform event "lead created"
and I want to do several distinct things within the same ...
20
votes
2answers
1k views
Apex Framework / library for consuming REST services
To consume REST services there is a lot of boilerplate code needed:
Build Apex Objects to model the responses
Code to deserialize REST responses to those classes
Handling of HTTP requests, responses ...
1
vote
1answer
33 views
Design Pattern for Updating Records?
A while back I wrote an Apex class to handle opportunity splits. I couldn’t use the Opportunity Splits object because there were splits on three different corporate levels (with one-to-many or many-...
0
votes
1answer
343 views
call Messaging Queue every 5 Minutes [closed]
I want to make Integration between Salesforce and ActiveMQ(Is is a messaging server where the company send and save messages in this service).
The Context:
Every 5 Minutes should salesforce a ...
1
vote
2answers
116 views
How to use trigger design pattern: ERROR Constructor not defined: [CaseTriggerHandler].<Constructor>()
I am trying to follow the best practice design patterns for triggers but get the error Constructor not defined: [CaseTriggerHandler].(). What am I missing?
Trigger
trigger CaseTrigger on Case (...
1
vote
1answer
1k views
fflib apex common Usage [closed]
We have a existing salesforce implementation, we have most of the logic in triggers and trigger handlers. We are still using classic and no mobile or other UI. But still we are planning to implement ...
2
votes
1answer
412 views
Trigger design pattern - Where to add decision making logic?
Looking for some suggestions/lessons learned, etc., regarding where to add the decision-making code that determines if some code should run after a particular field update in a trigger context.
For ...
1
vote
2answers
139 views
Design pattern for an attachment trigger using trigger framework?
Hoping to tap into the wisdom of the Apex design pattern wizards out there. We have recently moved to a trigger framework in order to decouple and standardize our wildly disparate trigger code ...
2
votes
2answers
374 views
Are Custom Labels Cached?
There was a requirement to store some key value pairs that will be frequently accessed and the current setup is that is being stored in custom labels. I was wondering if there is any evidence of ...
1
vote
1answer
69 views
How Exactly Do the Class and Trigger Connect in this Design Pattern?
Early on as an Apex developer, I adopted the following one-trigger-per-object design pattern:
Class
public with sharing class caseTriggerHandler {
public static boolean firstRun = true;
...
1
vote
2answers
512 views
How to Lock/Restrict/Block record from change in Salesforce Lightning
BACKGROUND
I am updating an external accounting system with information from custom objects like
Invoice
Credit Note
Payment Transaction
The Invoice and Credit Note custom objects have Status ...
0
votes
1answer
53 views
Best practice for managing a large number of email templates
I am interested to understand what is best practices when managing an org with 100+ email templates.
Specially in the circumstance where there is additional logic which needs to control which email ...
0
votes
0answers
24 views
Share a function among two apex classes
I have two class that both have this function
@AuraEnabled
public static String talkToAuthorizeDotNet(String body){
return AuthorizeDotNetUtility.makeCallout(body);
}
Is there a better way to ...
9
votes
2answers
1k views
How to Reduce Repeated If/Else Logic in Code
I'm relatively new to Apex, and one thing I've found is there are a few places in my code where the same the same if/else logic is repeated. I.e.
if (first_condition) {
// do something
} else if (...
4
votes
1answer
89 views
What is too many functions?
While reading through on some lightning documentation I came across this piece regarding Anti-Patterns. I have definitely had some helpers which have run the risk of embodying that anti pattern.
How ...
0
votes
1answer
1k views
How to mark a Salesforce Contract record as canceled or terminated?
I understand once a contract has been Activated, the status cannot be changed. However, there are times when a contract is terminated (ends early) and there needs to be a way to indicate this.
Are ...
1
vote
1answer
146 views
In a custom framework, should Triggers be allowed to retrigger by default?
I am developing a Trigger framework for our org and I’m faced with a decision of whether to automatically disable a Trigger once triggered or to keep enabled. I’ve got enableTrigger() and ...
-1
votes
2answers
508 views
Separation of Concerns? [closed]
I would learn more about SoC in Salesforce but I have a question.
Are these concepts really used during the projects or are only "theoretical and academic concepts" never used in real life for ...
2
votes
1answer
39 views
Can Interface declare only methods?
I have created the following interface and a class that implements it.
global interface SampleInterface {
String logicA();
}
public class SampleClass implements SampleInterface {
public ...
4
votes
2answers
377 views
Are there ever exceptions to the one trigger per object rule?
I know from this blog post and this answer that a one trigger design pattern per object is ideal. Are there ever exceptions to that rule? If so, what are they?
Here is my situation to argue that ...
15
votes
1answer
168 views
Would it be a good/bad idea to develop Lightning Components as “Pure Components”?
As a developer, I enjoy playing with different technologies and seeing what I can learn from, and what ideas I might bring back when working on SFDC (my bread and butter).
I'm currently looking at ...
0
votes
0answers
171 views
Utility methods failing with 'cannot call test methods in non-test context'
I generate a number of different email notifications from Cases, with variations depending on Account location, for example. They've morphed from basic workflow email templates in order to gather ...
5
votes
1answer
181 views
What value is there in an Application Service Provider
As I implement Andrew Fawcett's, Apex Common library referring to the fflib-apex-common-samplecode when necessary, I note that his ObjectService classes (i.e. OpportunitiesService.cls) are really more ...
2
votes
0answers
66 views
Using Abstract and Interface Class - Building application in Salesforce
I have been intrigued by using design patterns, Object oriented concepts when programming. I do not have much hands on with using these concepts when programming salesforce. I do have a theoretical ...
-1
votes
1answer
25 views
In single page how to create Account list, records need to show in below columns AccountName, Total number of contacts on Account
public class wrapperClassController1 {
public List<aAccount> AccountList {get; set;}
public integer ccount {get; set;}
public List<aAccount> getAccounts() {
if(AccountList == null) {
...
9
votes
1answer
1k views
Lightning Components Design Patterns
We are starting to develop a number of Lightning Components and we are struggling because of lack of well-established design patterns:
Where does global constant go and how they can be shared across ...
2
votes
1answer
217 views
MocksApex - behaviour verification
I am using the ApexMocks framework and I am having the following error message:
Class.MockTest.testBehavior: line 13, column 1 11:53:56.3
(10709808)|FATAL_ERROR|System.NullPointerException: ...
2
votes
1answer
109 views
Safely refactoring public methods in apex classes
True or False:
When refactoring legacy methods (e.g. adding a parameter or deleting altogether), it is guaranteed not to break anything as long as I update every reference in the code base, based on ...
1
vote
1answer
87 views
Help with business logic implementation (triggers VS field updates) and how to apply big refactors
I have some additional business logic I need to put into my QuoteLineItem object, but we have come to a situation where current logic is too spread across triggers and workflow rules + field updates ...
7
votes
1answer
173 views
Reusable Service Class's methods to handle Multi-Level Cloning and related Operation which can be called from Trigger/WebService/Controller
We have a SurveyApp where we deal with following objects:
1) Assessment
2) Section (Lookup to Assessment)
3) Question (Lookup to Section)
4) AnswerOption (Lookup to Question)
Inorder to handle ...
2
votes
1answer
536 views
Is there a better way to loop through multiple decisions / assignments?
Within my Visual Flow, I have a currency variable with a starting amount (Amount A).
There is a screen which asks the user to indicate (using checkboxes) if each of three additional amounts (B,C,D) ...
7
votes
3answers
1k views
Lightning component code optimization - capture helper enqueued callback within controller method
So I have the following structure:
Lightning Controller
({
doInit : function(....){
helper.getDataFromServer(......);
},
onSelectChangeFunction(.....){
component.set("v....
0
votes
1answer
218 views
Create a BaseTest class with common variables and methods
I'm trying to create a class that will act like a BaseClass for my Test classes.
It must include several variables, constants and methods common to my test methods.
The kicker is that Test methods ...
1
vote
1answer
184 views
Does this trigger have the right approach/best practices?
I built a trigger to update account owner depending on an external id value (Salesperson). If the salesperson code exists in a user then he will be the owner, if it doesn't exists or the code it's ...
2
votes
1answer
171 views
Decorator Pattern: Preventing Setter and Getter properties deadlock
I am only able to set one-sided conversion: either Bitcoin to USD or USD to Bitcoin. But I want both-sided conversion to work which is creating deadlock in Apex.
Following is the wrapper class:
...
3
votes
1answer
4k views
REST error handling design
I have created a very simple REST service to convert a lead:
@RestResource(urlMapping='/ConvertLeadFromApp/*')
global with sharing class RESTLeadConvertController {
@HttpGet
global static ...
1
vote
2answers
758 views
Trigger, preventing user from deleting campaign unless criteria met
Would love some guidance.
Criteria : Only the Campaign Owner can delete a campaign. If any contact member has a campaign member statuses passed 'Sent' then the campaign can not be deleted. I would ...
2
votes
3answers
644 views
Invoking trigger without any changes in the existing records or creating a new record
Is it possible to invoke a trigger without making any changes to the existing records or without creating a new record?
0
votes
1answer
542 views
ApexMocks: setMock() not working
I'm trying to unit test a very simple Account service but for some reason it appears the setMock() is not working. I'm using the following unit test example as a guide and I'm pretty positive I ...
3
votes
1answer
59 views
Building a better Controller - Navigation
Our organization relies heavily on Public Site Visual Force pages for data collection from our user community. These sites contain about a dozen or so VF Pages. The entire site controlled by a ...
6
votes
2answers
2k views
Apex - return this
I came across the following code. Is there any reason why it has used used return this?
public class EmailUtil {
private Messaging.SingleEmailMessage singleEmailMessage;
private final ...
