What is APEX? | sfdctelugu.in #salesforce #apex #development

 

What is Apex?

Apex is a proprietary programming language provided by Salesforce. It is similar to Java and C# and is specifically designed to work within the Salesforce environment. It allows developers to add custom business logic to system events such as button clicks, related record updates, and Visualforce pages.

Key Features of Apex:

1. Strongly Typed: Apex is a strongly typed language, which means it enforces strict data types and ensures type safety.

2. Object-Oriented: It supports classes, interfaces, and objects, which allows for modular and reusable code.

3. Integrated with the Database: Apex allows seamless integration with Salesforce's database. It includes DML (Data Manipulation Language) operations and SOQL (Salesforce Object Query Language).

4. Hosted: Apex code is stored and run in the cloud on Salesforce’s multi-tenant architecture.

5. Secure: Apex runs in a controlled environment and adheres to strict security guidelines.

6. Versioning: Salesforce supports versioning for Apex code, which helps in managing changes and upgrades.

Use Cases for Apex:

1. Triggers: Automatically execute Apex code in response to changes in Salesforce data (insert, update, delete).
2. Classes and Controllers: Define custom logic and behavior for Visualforce pages and Lightning components.
3. Web Services: Create and consume web services to integrate with other systems.
4. Email Services: Process incoming emails using Apex.
5. Scheduled Jobs: Schedule Apex code to run at specific times.

Basic Syntax:

Here are some basic elements of Apex syntax:

1. Variables and Data Types:

Integer myNumber = 10;

String myString = 'Hello, Salesforce!';

Boolean myBoolean = true;

2. Control Flow Statements:

if (myBoolean) {

    System.debug('Boolean is true');

} else {

    System.debug('Boolean is false');

}

for (Integer i = 0; i < 10; i++) {

    System.debug('Number: ' + i);

}

3. DML Operations:

Account newAccount = new Account(Name = 'New Account');

insert newAccount;

newAccount.Name = 'Updated Account Name';

update newAccount;

delete newAccount;

4. SOQL Queries:

List<Account> accounts = [SELECT Id, Name FROM Account WHERE Name = 'New Account'];

for (Account acc : accounts) {

    System.debug('Account Name: ' + acc.Name);

}

5. Writing a Trigger:

trigger AccountTrigger on Account (before insert, before update) {

    for (Account acc : Trigger.new) {

        if (acc.Name == 'Test') {

            acc.Description = 'This is a test account';

        }

    }

}

6. Creating a Class:

public class MyCustomClass {

    public void myMethod() {

        System.debug('Hello from MyCustomClass!');

    }

}

Best Practices:

1. Governor Limits: Salesforce enforces limits to ensure efficient use of resources. Be aware of these limits (e.g., number of SOQL queries, DML statements, CPU time).
2. Bulk Processing: Always write Apex code to handle bulk records efficiently to avoid hitting governor limits.
3. Testing: Write test classes to cover your Apex code. Salesforce requires at least 75% code coverage for deployment.
4. Error Handling: Implement robust error handling and logging mechanisms.
5. Code Reviews: Regularly review and refactor code to maintain quality and performance.
   
   
   
   
   
   
   
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