Table of Contents
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Blog Summary
- Asynchronous Apex allows lengthy or resource-intensive processes to execute in the background to improve performance and user experience.
- It covers 4 methods: Future Methods, Batch Apex, Queueable Apex, and Scheduled Apex, which are designed for specific use cases.
- It offers better performance, smart resource management, governor limit management, a smooth user experience, and scalability.
As businesses scale and their operations become more complex, the need for efficient and optimized processes in software development has never been more critical. Salesforce, a leading CRM platform, offers various tools to enhance and streamline development workflows.
Suppose you run an online business and have to integrate Salesforce with an external payment gateway. When a user completes a purchase, you must send the transaction details to the payment gateway and update the Salesforce record based on the response.
Using Asynchronous Apex, you can handle the callout to the external service so that the initiating Transaction does not have to wait for the asynchronous job to complete. Sounds smooth, right?
So, let’s delve into the details of this feature, exploring how it differs from synchronous processes. We will also list the various types of asynchronous processes in Salesforce and their advantages to your development projects.
What is Asynchronous Apex?
Asynchronous Apex refers to the Salesforce procedures and methods that let activities be carried out in the background without slowing down the main program flow. It allows dealing with operations that can be postponed or operations that need different transaction limits, such as long-running processing, large data volumes, scheduled work, and certain callouts.
It allows developers to perform operations like callouts to external services, complex calculations, and batch processing without impacting the user experience. For instance, if you need to process a large set of records synchronously, it could lead to timeouts and a poor user experience. Using asynchronous Apex, you can move operations in the background, managing governor limits and ensuring smoother performance.
What is an Asynchronous Process?
Asynchronous vs Synchronous
- Synchronous Process: Tasks are executed sequentially, one after the other. The program waits for each task to complete before moving on to the next.
- Asynchronous Process: Tasks are executed independently. The program can continue running other tasks while waiting for the asynchronous task to complete.
Types of Asynchronous Processes
Salesforce offers different mechanisms for asynchronous Apex, including Future Methods, Batch Apex, Queueable Apex, and Scheduled Apex. However, for new implementations, Salesforce recommends Queueable Apex over Future methods when simple methods are not available. Let us understand the different ways to implement an asynchronous Apex process.
1. Future Methods
Future methods use a method to execute asynchronously in a different transaction after the current transaction is complete. This method is named for its @future annotation, which tells Salesforce to execute methods asynchronously.
When to Use:
- Ideal for callouts that are performed asynchronously while initiating the context, like a trigger. It doesn’t allow callouts from synchronous methods directly.
- Useful for operations that need to run asynchronously but don’t require complex control or dependency management over the job.
- Suitable for scenarios where the immediate result of the operation is not needed.
Example:
Suppose a user action in Salesforce, such as completing a form, requires changing records in an external system. A Future Method can execute a callout in a separate thread, keeping the main transaction unaffected, and letting the external process complete. For new functionalities, Queueable Apex is often the better choice if you need more features or insights.
2. Batch Apex
Batch Apex divides massive amounts of data into digestible portions for processing. Because each chunk is processed independently, Salesforce’s governor restrictions are easier to manage and adhere to.
When to Use:
- Suitable for operations involving thousands or millions of records that need to be processed in smaller, asynchronous batches.
- Ideal for data cleansing, mass updates, and complex calculations that would otherwise exceed governor limits if processed synchronously.
- Adequate for long-running tasks that can be split into discrete units of work.
Example:
A scenario where millions of records need to be updated to standardize data formats. Batch Apex can process these records in chunks, ensuring efficient and safe data processing without hitting limits.
3. Queueable Apex
Compared to future approaches, Queueable Apex offers more sophisticated work control and thorough monitoring with the ability to chain jobs. It provides a mechanism to submit jobs for asynchronous processing while keeping track of each job’s progress and outcome.
When to Use:
- Use when you need to chain jobs together, where the completion of one job triggers the start of another.
- Ideal for scenarios requiring more detailed monitoring and control than what future methods provide.
- Suitable for operations where steps are dependent on the successful completion of previous steps.
Example:
In an e-commerce application, processing an order involves multiple steps: payment verification, inventory update, and shipping label generation. Queueable Apex can chain these jobs, ensuring each step is completed before the next one begins.
4. Scheduled Apex
Using Scheduled Apex, you can run Apex classes at predetermined periods. This is helpful for automating repetitive processes that must be carried out regularly without human involvement.
When to Use:
- Ideal for recurring tasks that need to run periodically, such as daily or weekly.
- Suitable for maintenance tasks, reporting, or any process that benefits from being run on a schedule.
- Adequate for tasks that need to be performed outside of peak usage times to minimize impact on system performance.
Example:
Sending Out Daily or Weekly Summary Emails: A business might need to send daily summary reports to managers. Scheduled Apex can automate this process, running a job daily at a specified time to generate and email the report.
Well, isn’t that neat? With so many use cases, the asynchronous process becomes a beneficial feature in Salesforce. Let’s understand these benefits
Advantages of Using Asynchronous Apex in Salesforce
Using Asynchronous Apex in Salesforce offers several benefits, including:
- Improved Performance: System resources are freed for better user interactions by offloading long-running tasks to run asynchronously.
- Better Resource Utilization: Asynchronous processes help manage system limits and resources more efficiently.
- Enhanced User Experience: Users do not have to wait for tasks to complete, leading to a smoother and more responsive application.
- Scalability: Asynchronous processes can handle larger datasets and more complex operations by distributing workload across separate transactions.
In Essence
Salesforce’s asynchronous Apex is a potent feature that lets developers efficiently manage resources and maximize performance. By comprehending and utilizing asynchronous processes like batch Apex, queueable Apex, scheduled Apex, and future methods, you may improve the usefulness and scalability of your Salesforce apps. If you are learning Apex in Salesforce, you must understand the asynchronous Apex.
Shrey Sharma is the Founder of S2 Labs and a 2019 Salesforce MVP. He's trained 50,000+ students into Salesforce careers and runs Salesforce Hulk, the largest Salesforce-focused YouTube community. He's been a featured speaker at Salesforce community events worldwide, and his mission with S2 Labs remains simple: real mentorship, hands-on projects, and a clear path from classroom to career.
