Python 3 deprecated the logger.warn method in favor of warning

According to https://docs.python.org/3/library/logging.html#logging.warning,
We prefer to use warning to avoid DeprecationWarning.

Change-Id: I29e960b3ba179e0701a57aee84cff6bdf4105db5

oslo_vmware/api.py

@@ -95,11 +95,11 @@ class RetryDecorator(object):
                 result = f(*args, **kwargs)
             except self._exceptions:
                 with excutils.save_and_reraise_exception() as ctxt:
-                    LOG.warn(_LW("Exception which is in the suggested list of "
-                                 "exceptions occurred while invoking function:"
-                                 " %s."),
-                             func_name,
-                             exc_info=True)
+                    LOG.warning(_LW("Exception which is in the suggested list "
+                                    "of exceptions occurred while invoking "
+                                    "function: %s."),
+                                func_name,
+                                exc_info=True)
                     if (self._max_retry_count != -1 and
                             self._retry_count >= self._max_retry_count):
                         LOG.error(_LE("Cannot retry upon suggested exception "
@@ -494,8 +494,8 @@ class VMwareAPISession(object):
                                    lease,
                                    'error')
         except exceptions.VimException:
-            LOG.warn(_LW("Error occurred while reading error message for "
-                         "lease: %s."),
-                     lease,
-                     exc_info=True)
+            LOG.warning(_LW("Error occurred while reading error message for "
+                            "lease: %s."),
+                        lease,
+                        exc_info=True)
             return "Unknown"

oslo_vmware/common/loopingcall.py

@@ -79,8 +79,9 @@ class FixedIntervalLoopingCall(LoopingCallBase):
                         break
                     delay = interval - timeutils.delta_seconds(start, end)
                     if delay <= 0:
-                        LOG.warn(_LW('task run outlasted interval by %s sec'),
-                                 -delay)
+                        LOG.warning(_LW('task run outlasted interval '
+                                        'by %s sec'),
+                                    -delay)
                     greenthread.sleep(delay if delay > 0 else 0)
             except LoopingCallDone as e:
                 self.stop()

oslo_vmware/exceptions.py

@@ -168,8 +168,8 @@ class ImageTransferException(VMwareDriverException):
 
 
 def _print_deprecation_warning(clazz):
-    LOG.warn(_LW("Exception %s is deprecated, it will be removed in the "
-                 "next release."), clazz.__name__)
+    LOG.warning(_LW("Exception %s is deprecated, it will be removed in the "
+                    "next release."), clazz.__name__)
 
 
 class VMwareDriverConfigurationException(VMwareDriverException):

oslo_vmware/pbm.py

@@ -196,7 +196,7 @@ def get_pbm_wsdl_location(vc_version):
     pbm_service_wsdl = os.path.join(curr_dir, 'wsdl', major_minor,
                                     'pbmService.wsdl')
     if not os.path.exists(pbm_service_wsdl):
-        LOG.warn(_LW("PBM WSDL file %s not found."), pbm_service_wsdl)
+        LOG.warning(_LW("PBM WSDL file %s not found."), pbm_service_wsdl)
         return
     pbm_wsdl = urlparse.urljoin('file:', urllib.pathname2url(pbm_service_wsdl))
     LOG.debug("Using PBM WSDL location: %s.", pbm_wsdl)

oslo_vmware/rw_handles.py

@@ -152,8 +152,8 @@ class FileHandle(object):
         try:
             self._file_handle.close()
         except Exception:
-            LOG.warn(_LW("Error occurred while closing the file handle"),
-                     exc_info=True)
+            LOG.warning(_LW("Error occurred while closing the file handle"),
+                        exc_info=True)
 
     def _build_vim_cookie_header(self, vim_cookies):
         """Build ESX host session cookie header."""
@@ -300,8 +300,8 @@ class FileWriteHandle(FileHandle):
         try:
             self._conn.getresponse()
         except Exception:
-            LOG.warn(_LW("Error occurred while reading the HTTP response."),
-                     exc_info=True)
+            LOG.warning(_LW("Error occurred while reading the HTTP response."),
+                        exc_info=True)
         super(FileWriteHandle, self).close()
 
     def __str__(self):
@@ -473,9 +473,10 @@ class VmdkWriteHandle(FileHandle):
                           {'url': self._url,
                            'state': state})
         except exceptions.VimException:
-            LOG.warn(_LW("Error occurred while releasing the lease for %s."),
-                     self._url,
-                     exc_info=True)
+            LOG.warning(_LW("Error occurred while releasing the lease "
+                            "for %s."),
+                        self._url,
+                        exc_info=True)
         super(VmdkWriteHandle, self).close()
         LOG.debug("Closed VMDK write handle for %s.", self._url)
 
@@ -611,9 +612,10 @@ class VmdkReadHandle(FileHandle):
                           {'url': self._url,
                            'state': state})
         except exceptions.VimException:
-            LOG.warn(_LW("Error occurred while releasing the lease for %s."),
-                     self._url,
-                     exc_info=True)
+            LOG.warning(_LW("Error occurred while releasing the lease "
+                            "for %s."),
+                        self._url,
+                        exc_info=True)
             raise
         super(VmdkReadHandle, self).close()
         LOG.debug("Closed VMDK read handle for %s.", self._url)