Callouts not supported in scheduled class

Question

I have a scheduled class which needs to call to external WebService. Base on the WebService result - I'll need to run some logic - and call to additional update callout function.

Since the callout are not supported in scudeule classes - solution would be to use @future annotation.

The problem is that I can't tell when the first WebService function finish it's execution and I can't use it's output.

Is there any way call the WebService as well use its output result?

Answer 1

You'll have to do whatever DML you need to do in the future/queueable method that you call. You cannot perform a callout in a Schedulable class. That means your logic will look like this:

public void execute(SchedulableContext context) {
  callWebService();
}
@future(callouts=true) public static void callWebService() {
  ... Do callout and DML ...
}

The future method will run after the Schedulable class' execute method, so there's no way your Schedulable class can use the results of your callout method.