Synchronous Programming:

  • 1. In synchronous programming in Salesforce, operations are executed one after the other in a sequential manner.
  • 2. When a user triggers an action (such as clicking a button or submitting a form), the system processes that action immediately and waits for it to complete before moving on to the next operation.
  • 3. Common examples of synchronous operations in Salesforce include triggers and Apex classes that run in response to user interactions.

Asynchronous Programming:

1. Asynchronous programming in Salesforce involves executing operations independently of the main program flow.
2. Salesforce provides mechanisms for asynchronous processing, such as future methods, batch processes, and queueable jobs.
3. Asynchronous programming is often used when dealing with operations that may take a considerable amount of time, such as complex calculations, external integrations, or large data processing tasks.
4. Asynchronous processing helps prevent long-running operations from blocking the user interface and provides a more responsive user experience.

Example (using a future method for asynchronous processing in Apex):
In Salesforce, the choice between synchronous and asynchronous programming depends on factors such as the nature of the task, performance considerations, and user experience requirements. Synchronous operations are suitable for tasks that can be completed quickly and are initiated by user interactions, while asynchronous operations are appropriate for longer-running tasks that should not impact the immediate user experience.