Common framework:

- Extended log messages of retry decorator to showcase method being retried

src/common/tools/client/RetryDecorator.py

@@ -51,24 +51,32 @@ LOGGER = logging.getLogger(__name__)
 def delay_linear(initial=0, increment=0, maximum=None):
     def compute(num_try):
         delay = initial + (num_try - 1) * increment
-        if maximum is not None: delay = max(delay, maximum)
+        if maximum is not None:
+            delay = max(delay, maximum)
         return delay
     return compute
 
 def delay_exponential(initial=1, increment=1, maximum=None):
     def compute(num_try):
         delay = initial * pow(increment, (num_try - 1))
-        if maximum is not None: delay = max(delay, maximum)
+        if maximum is not None:
+            delay = max(delay, maximum)
         return delay
     return compute
 
-def retry(max_retries=0, delay_function=delay_linear(initial=0, increment=0),
-          prepare_method_name=None, prepare_method_args=[], prepare_method_kwargs={}):
+# pylint: disable=dangerous-default-value
+def retry(
+    max_retries=0, delay_function=delay_linear(initial=0, increment=0),
+    prepare_method_name=None, prepare_method_args=list(), prepare_method_kwargs=dict()
+):
     def _reconnect(func):
         def wrapper(self, *args, **kwargs):
             if prepare_method_name is not None:
                 prepare_method = getattr(self, prepare_method_name, None)
-                if prepare_method is None: raise Exception('Prepare Method ({}) not found'.format(prepare_method_name))
+                if prepare_method is None:
+                    MSG = 'Prepare Method ({:s}) not found'
+                    # pylint: disable=broad-exception-raised
+                    raise Exception(MSG.format(prepare_method_name))
             num_try, given_up = 0, False
             while not given_up:
                 try:
@@ -78,14 +86,29 @@ def retry(max_retries=0, delay_function=delay_linear(initial=0, increment=0),
 
                     num_try += 1
                     given_up = num_try > max_retries
-                    if given_up: raise Exception('Giving up... {:d} tries failed'.format(max_retries)) from e
+                    if given_up:
+                        MSG = '[{:s}:{:s}] Giving up... {:d} tries failed'
+                        msg = MSG.format(func.__module__, func.__name__, max_retries)
+                        # pylint: disable=broad-exception-raised
+                        raise Exception(msg) from e
                     if delay_function is not None:
                         delay = delay_function(num_try)
                         time.sleep(delay)
-                        LOGGER.info('Retry {:d}/{:d} after {:f} seconds...'.format(num_try, max_retries, delay))
+                        MSG = '[{:s}:{:s}] Retry {:d}/{:d} after {:f} seconds...'
+                        LOGGER.info(MSG.format(
+                            func.__module__, func.__name__, num_try, max_retries, delay
+                        ))
                     else:
-                        LOGGER.info('Retry {:d}/{:d} immediate...'.format(num_try, max_retries))
+                        MSG = '[{:s}:{:s}] Retry {:d}/{:d} immediate...'
+                        LOGGER.info(MSG.format(
+                            func.__module__, func.__name__, num_try, max_retries
+                        ))
 
-                    if prepare_method_name is not None: prepare_method(*prepare_method_args, **prepare_method_kwargs)
+                    if prepare_method_name is not None:
+                        MSG = '[{:s}:{:s}] Running prepare method...'
+                        LOGGER.debug(MSG.format(
+                            prepare_method.__module__, prepare_method.__name__
+                        ))
+                        prepare_method(*prepare_method_args, **prepare_method_kwargs)
         return wrapper
     return _reconnect