Fix namespace and subsystem in multiprocess mode (#159)

See #158 for details.

Author: atollena

prometheus_client/core.py

@@ -534,9 +534,9 @@ def init(name, documentation, labelnames=(), namespace='', subsystem='', registr
                     raise ValueError('Reserved label metric name: ' + l)
                 if l in cls._reserved_labelnames:
                     raise ValueError('Reserved label metric name: ' + l)
-            collector = _LabelWrapper(cls, name, labelnames, **kwargs)
+            collector = _LabelWrapper(cls, full_name, labelnames, **kwargs)
         else:
-            collector = cls(name, (), (), **kwargs)
+            collector = cls(full_name, (), (), **kwargs)
 
         if not _METRIC_NAME_RE.match(full_name):
             raise ValueError('Invalid metric name: ' + full_name)

tests/test_multiprocess.py

@@ -110,6 +110,12 @@ def test_gauge_livesum(self):
         mark_process_dead(123, os.environ['prometheus_multiproc_dir'])
         self.assertEqual(2, self.registry.get_sample_value('g'))
 
+    def test_namespace_subsystem(self):
+         c1 = Counter('c', 'help', registry=None, namespace='ns', subsystem='ss')
+         c1.inc(1)
+         self.assertEqual(1, self.registry.get_sample_value('ns_ss_c'))
+
+
 class TestMmapedDict(unittest.TestCase):
     def setUp(self):
         fd, self.tempfile = tempfile.mkstemp()