Skip to main content

Apex Basic and Database : What is Apex ?


Note: All credit goes to Salesforce, I am just a developer who enjoy playing trailhead and try to make note to myself.

What is Apex?

programming language that uses Java-like syntax and acts like database stored procedures. Apex enables developers to add business logic to system events, such as button clicks, updates of related records, and Visualforce pages.
source

 Apex is:


  • Hosted—Apex is saved, compiled, and executed on the server—the Force.com platform.
  • Automatically upgradeable—Because compiled code is stored as metadata in the platform, Apex is automatically upgraded as part of Salesforce releases.
  • Object oriented—Apex supports classes, interfaces, and inheritance.
  • Strongly typed—Apex validates references to objects at compile time.
  • Multitenant aware—Governer limit.Because Apex runs in a multitenant platform, it guards closely against runaway code by enforcing limits, which prevent code from monopolizing shared resources.
  • Integrated with the database—It is straightforward to access and manipulate records. Apex provides direct access to records and their fields, and provides statements and query languages to manipulate those records.
  • Data focused—Apex provides transactional access to the database, allowing you to roll back operations.
  • Easy to use—Apex is based on familiar Java idioms.
  • Easy to test—Apex provides built-in support for unit test creation, execution, and code coverage. Salesforce ensures that all custom Apex code works as expected by executing all unit tests prior to any platform upgrades.
  • Versioned—Custom Apex code can be saved against different versions of the API.


Apex is similar in OOP in :
  • Classes, interfaces, properties, and collections (including arrays).
  • Object and array notation.
  • Expressions, variables, and constants.
  • Conditional statements (if-then-else) and control flow statements (for loops and while loops).
Additionally Apex supports:
  • Cloud development as Apex is stored, compiled, and executed in the cloud.
  • Triggers, which are similar to triggers in database systems.
  • Database statements that allow you to make direct database calls and query languages to query and search data.
  • Transactions and rollbacks.
  • The global access modifier, which is more permissive than the public modifier and allows access across namespaces and applications.
  • Versioning of custom code.
  • Apex is a case-insensitive language.
Labels:

Comments

Post a Comment

Popular posts from this blog

Search Solution Basics

When is it a good time to create a customized search solution? You're developing an external knowledge base for user support. You're in the mood for a fun Friday night. The sales reps just started using the Sales Cloud in Lightning Experience. You want to put your company branding in the search bar. What differentiates SOSL from SOQL? Syntax SOSL searches the search index instead of the org database. SOSL searches more efficiently when you don't know in which object the data resides. All of the above. SOSL works with: REST only SOAP only REST, SOAP, and Apex SOQL only What does a search for a single object look like in SOSL? FIND {cloud} RETURNING Account FIND in ACCOUNT RETURNING "cloud" FIND "cloud" in ACCOUNT FIND (cloud) RIGHT NOW! What does a search for multiple objects look like in SOSL? FIND {sneakers} RETURNING ALL ARTICLES FIND {sneakers} in ALL OBJECTS FIND {sneakers} RETURNING Product2, Content
Post a Comment
Read more

Process Builder is not fired when field update is called from Approval Process

Scenario In Final Approvals section ; in Approval Process we have field update to update Status field. In Process Builder , we have some action that need to be done when Status field is updated in Approval Process.However this process builder is not fired. Solution To handle this, in Field Update in Approval Process , check Re-evaluated Workflow Rules after Field Change as picture below. What happen if field updated from Approval Process. Workflow - does not fires untill Re-evaluate workflow checkbox is ticked on your field update Process Builder - does not fires untill Re-evaluate workflow checkbox is ticked on your field update Trigger - will fire if conditions are matched This is explained in article here  . Field Updates That Re-evaluate Workflow Rules If  Re-evaluate Workflow Rules After Field Change  is enabled for a field update action, Salesforce  re-evaluates all workflow rules on the object if the field update results in a change to the value of the fi
Post a Comment
Read more

Tips and Tricks : Test class for Invocable method

Issue : I got 100% coverage in my sandbox but when run validation for deployment it returns 0% coverage It turn out that in my sandbox, I am depending on Process Builder to Invocable Apex class, as long I manipulate test data that fire Process Builder it will call Invocable class. This is not useful when deploying it to Production although it gets deployed together with Process Builder. The correct way is to direct call Invocable method inside test class itself. Example of class : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 global class MyCustomObject_StatusUpdate_Util { @InvocableMethod ( label = ' Update Quote Status ' ) public static void updateQuote ( Request [] requests ) { Set < Id > setOppId = new Set < Id >(); List < SBQQ__Quote__c > listQuoteToUpdate = new List < SBQQ__Quote__c >(); for ( Request request : requests ) {
1 comment
Read more