Final answer:
The Scheduler class in Apex is used to run scheduled Apex jobs in Salesforce using Cron expressions. Implement the Schedulable interface in an Apex class and define the execute method for the logic to be run. The System.schedule method schedules the job with a cron expression, such as '0 0 10 ? * MON' for every Monday at 10 AM.
Step-by-step explanation:
The Scheduler class in Apex is a feature in Salesforce that allows developers to run scheduled jobs that execute Apex code at specified times. Scheduling is done using Cron expressions to specify the timing of the job.
To schedule an Apex class, you must implement the Schedulable interface in your class. This requires defining the execute method, which includes the logic that should be run when the scheduler invokes the class. For example:
global class MyScheduledClass implements Schedulable {
global void execute(SchedulableContext ctx) {
// Your code here
}
}
To schedule the job, you use the System.schedule method with a Cron expression that defines the schedule. A Cron expression is a string of fields separated by spaces that represent a schedule in minutes, hours, days of the month, months, days of the week, and optional year. For instance, to schedule a job to run every Monday at 10 AM, you would use a Cron expression like this: '0 0 10 ? * MON'.