From 18836a44952929a47f5f65d93667472816e9eb8f Mon Sep 17 00:00:00 2001
From: Marco Capitani <m.capitani@nextworks.it>
Date: Fri, 21 Apr 2017 16:56:03 +0200
Subject: rumba: log: Simplified configuration, small fixes

---
 rumba/log.py                  | 53 +++++++++++++++++--------------------------
 rumba/testbeds/emulab.py      |  3 ---
 rumba/testbeds/faketestbed.py |  3 ---
 rumba/testbeds/jfed.py        |  5 +---
 4 files changed, 22 insertions(+), 42 deletions(-)

diff --git a/rumba/log.py b/rumba/log.py
index c9c3c01..ebb76dc 100644
--- a/rumba/log.py
+++ b/rumba/log.py
@@ -5,46 +5,35 @@ import sys
 import multiprocessing
 
 
-config_lock = multiprocessing.Lock()
+def setup():
+    handler = logging.StreamHandler(sys.stdout)
+    handler.lock = multiprocessing.RLock()
+    logging.basicConfig(format='{asctime} | {levelname:8.8} | '
+                               '{name:15.15} | {message}',
+                        style='{',
+                        handlers=[handler],
+                        level=logging.DEBUG)
+    logging.getLogger('').setLevel(logging.ERROR)
 
 
-class _LoggingConfigurator(object):
+# Used for the first call, in order to configure logging
+def _get_logger_with_setup(name):
+    setup()
+    # Swap _get_logger implementation to the setup-less version.
+    global _get_logger
+    _get_logger = _get_logger_without_setup
+    return logging.getLogger(name)
 
-    is_done = False
 
-    def setup(self):
-        with config_lock:
-            if not self.is_done:
-                # Double check, so we only configure once.
-                handler = logging.StreamHandler(sys.stdout)
-                handler.lock = multiprocessing.RLock()
-                logging.basicConfig(format='{asctime} | {levelname:8.8} | '
-                                           '{name:15.15} | {message}',
-                                    style='{',
-                                    handlers=[handler],
-                                    level=logging.DEBUG)
-                logging.getLogger('').setLevel(logging.ERROR)
-                global configurator
-                configurator = _SkipLoggingConfigurator()
-            else:
-                pass
+# Then this one is used.
+def _get_logger_without_setup(name):
+    return logging.getLogger(name)
 
-    def get_logger(self, name):
-        self.setup()
-        return logging.getLogger(name)
 
-
-class _SkipLoggingConfigurator(object):
-
-    @staticmethod
-    def get_logger(name):
-        return logging.getLogger(name)
-
-
-configurator = _LoggingConfigurator()
+_get_logger = _get_logger_with_setup
 
 
 def get_logger(name):
-    logger = configurator.get_logger(name.split('.')[-1])
+    logger = _get_logger(name.split('.')[-1])
     logger.setLevel(logging.DEBUG)
     return logger
diff --git a/rumba/testbeds/emulab.py b/rumba/testbeds/emulab.py
index cc7ce76..e7458bc 100644
--- a/rumba/testbeds/emulab.py
+++ b/rumba/testbeds/emulab.py
@@ -247,6 +247,3 @@ class Testbed(mod.Testbed):
         self.swap_exp_in()
         self.wait_until_nodes_up()
         self.complete_experiment_graph(experiment)
-
-    def swap_out(self, experiment):
-        pass
diff --git a/rumba/testbeds/faketestbed.py b/rumba/testbeds/faketestbed.py
index c1cd865..10d2580 100644
--- a/rumba/testbeds/faketestbed.py
+++ b/rumba/testbeds/faketestbed.py
@@ -33,6 +33,3 @@ class Testbed(mod.Testbed):
 
     def swap_in(self, experiment):
         logger.info("[Fake testbed] experiment swapped in")
-
-    def swap_out(self, experiment):
-        pass
diff --git a/rumba/testbeds/jfed.py b/rumba/testbeds/jfed.py
index 1c0f992..5394146 100644
--- a/rumba/testbeds/jfed.py
+++ b/rumba/testbeds/jfed.py
@@ -54,7 +54,7 @@ class Testbed(mod.Testbed):
             self.image = None
 
         if not os.path.exists(self.jfed_jar):
-            logger.warning("Couldn't find jFed CLI. Downloading.")
+            logger.info("Couldn't find jFed CLI. Downloading.")
             tarball = "jfed_cli.tar.gz"
             url = "http://jfed.iminds.be/downloads/stable/jar/" + tarball
             wget.download(url)
@@ -183,6 +183,3 @@ class Testbed(mod.Testbed):
                             ipcp.ifname = comp_arr[-1]
                             # xml_ip = intf.getElementsByTagName("ip")
                             # interface.ip = xml_ip[0].getAttribute("address")
-
-    def swap_out(self, experiment):
-        pass
-- 
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