Rollback Mechanism For Third Party Services

Question

I have three different third-party services and I try to call all of them in a single handle method. Also, I want to handle rollback operation. But I'm not sure about implementation. Here is my code:

void handle() {
    service1.create();
    callService2OrRollback();
    callService3OrRollback()
}

void callService2OrRollback() {
  try {
      service2.create();
  } catch(Exception e) {
      service1.delete();
      throw e;
  }
}

void callService3OrRollback() {
  try {
      service3.create();
  } catch(Exception e) {
      service1.delete();
      service2.delete();
      throw e;
  }
}

Is there a better way to implement rollback mechanisms? BTW, I'm using java and spring-boot.

Answer 1

Inspired from Temporal: https://temporal.io/blog/saga-pattern-made-easy

public final class Saga {
    private final List<Runnable> compensationOps = new ArrayList<>();

    public void addCompensation(Runnable runnable) {
        compensationOps.add(runnable);
    }

    public void compensate() {
        for (Runnable runnable : compensationOps) {
            try {
                runnable.run();
            } catch (Exception e) {
                log.error("Unexpected error on compensation and ignored sakes of remaining rollbacks");
            }
        }
    }
}

Example Usage:

Saga saga = new Saga();
try {
   triggerFirstService();
   saga.addCompensation(() -> addFirstServiceRollback());

   triggerSecondService();
   saga.addCompensation(() -> addSecondServiceRollback());

   triggerFinalService();
} catch(Exception ex) {
  saga.compensate();
}