Change in vdsm[master]: API: streamline and make setLogLevel correct

Francesco Romani has uploaded a new change for review.

Change subject: API: streamline and make setLogLevel correct
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API: streamline and make setLogLevel correct

According to the schema, setLogLevel should accept
a log level string ('DEBUG', 'INFO',...). But the code
actually blindly casted the given value to int(), and this suggests
the code actually expected an integer value.

To make things a bit user friendlier and comformant to schema, change
the argument to actually be a log level in string format.

Along the way, this patch streamlines the implementation of setLogLevel
and makes it simpler.

Change-Id: Iaddbb12d13bdbaa7a02255ab209da11e42d2ea97
Signed-off-by: Francesco Romani 
---
M vdsm/API.py
1 file changed, 21 insertions(+), 6 deletions(-)

git pull ssh://gerrit.ovirt.org:29418/vdsm refs/changes/25/38425/1

diff --git a/vdsm/API.py b/vdsm/API.py
index 5cbda50..85478b1 100644
--- a/vdsm/API.py
+++ b/vdsm/API.py
@@ -1369,13 +1369,22 @@

Doesn't survive a restart
         """
-        logging.info('Setting loglevel to %s', level)
-        handlers = logging.getLogger().handlers
-        [fileHandler] = [h for h in handlers if
-                         isinstance(h, logging.FileHandler)]
-        fileHandler.setLevel(int(level))
+        LEVELS = {
+            'DEBUG': logging.DEBUG,
+            'INFO': logging.INFO,
+            'WARNING': logging.WARNING,
+            'ERROR': logging.ERROR,
+            'CRITICAL': logging.CRITICAL
+        }

-        return {'status': doneCode}
+        try:
+            log_level = LEVELS[level]
+        except KeyError:
+            return errCode['unavail']
+        else:
+            logging.info('Setting loglevel to %s (%d)', level, log_level)
+            _set_log_level(logging.getLogger(), log_level)
+            return {'status': doneCode}

# VM-related functions
     def getVMList(self, fullStatus=False, vmList=()):
@@ -1772,3 +1781,9 @@
                 logging.warn("options %s is deprecated. Use %s instead" %
                              (k, _translationMap[k]))
                 options[_translationMap[k]] = options.pop(k)
+
+
+def _set_log_level(logger, log_level):
+    for handler in logger.handlers:
+        if isinstance(handler, logging.FileHandler):
+            handler.setLevel(log_level)