Scheduling Apex Jobs
In this chapter, we are going to discuss how we can schedule Apex jobs to run at some pre-determined point in the future or on a regular basis. All the asynchronous processing options we have seen so far – future methods, Batch Apex, and Queueable Apex – run when resources are available after being invoked in as near to real time as possible (except for scheduled Batch Apex, which we will discuss in more detail later). We invoke our future, batch, or Queueable method, and whenever resources are available, Salesforce will process the request and execute our code.
Scheduled Apex jobs, on the other hand (including scheduled batch jobs), execute on or after a desired time as set by the developer. This could be a single time as a one-off execution (for example, updating a series of records when a new field is added), or on a more regular scheduled basis, based on your use case – for example, a nightly integration sync.
In this chapter, we...
