Move check if it make sense to set start position to dedicated function.

src/AsapoWorker/application.py

@@ -163,8 +163,7 @@ class Application:
         consumer.stream = stream
         if sender:
             sender.stream = stream
-        if hasattr(self.worker_class, 'calculate_start_ids'):
-            _set_start_position(self.options, consumer, sender, self.worker_class)
+        _set_start_position(self.options, consumer, sender, self.worker_class)
 
         worker = create_instance_from_configurable(
             self.worker_class, self.options["worker"])
@@ -221,6 +220,12 @@ class Application:
 
 
 def _set_start_position(options, consumer, sender, worker_class):
+    if (not hasattr(worker_class, 'calculate_start_ids')
+            or not hasattr(worker_class, 'calculate_start_index')):
+        log.info(
+            "Worker does not support starting from the last processed "
+            "record. Starting from the beginning instead")
+        return
     if ("start_id" not in options["worker"]
             or "start_id" not in options["receiver"]
             or "start_index" not in options["worker"]):
@@ -246,26 +251,21 @@ def _set_start_position(options, consumer, sender, worker_class):
             last_output_metadata = None
 
         if last_output_metadata:
-            try:
-                input_start_id, output_start_id = (
-                    worker_class.calculate_start_ids(last_output_metadata))
+            input_start_id, output_start_id = (
+                worker_class.calculate_start_ids(last_output_metadata))
 
-                output_start_index = worker_class.calculate_start_index(
-                    last_output_metadata)
-            except AttributeError:
-                log.warning(
-                    "Worker does not support starting from the last processed "
-                    "record. Starting from the beginning instead")
-            else:
-                consumer.set_start_id(input_start_id)
+            output_start_index = worker_class.calculate_start_index(
+                last_output_metadata)
+
+            consumer.set_start_id(input_start_id)
 
-                log.info(
-                    "Setting worker option start_id=%s", output_start_id)
-                options["worker"]["start_id"] = output_start_id
+            log.info(
+                "Setting worker option start_id=%s", output_start_id)
+            options["worker"]["start_id"] = output_start_id
 
-                log.info(
-                    "Setting worker option start_index=%s", output_start_index)
-                options["worker"]["start_index"] = output_start_index
+            log.info(
+                "Setting worker option start_index=%s", output_start_index)
+            options["worker"]["start_index"] = output_start_index
 
 
 def _unset_start_position(options):