diff --git a/ceilometer/cmd/eventlet/sample.py b/ceilometer/cmd/eventlet/sample.py
index c08212e6..6f5794a7 100644
--- a/ceilometer/cmd/eventlet/sample.py
+++ b/ceilometer/cmd/eventlet/sample.py
@@ -23,11 +23,11 @@ import sys
 from oslo_config import cfg
 from oslo_context import context
 from oslo_utils import timeutils
+from stevedore import extension
 
 from ceilometer import pipeline
 from ceilometer import sample
 from ceilometer import service
-from ceilometer import transformer
 
 
 def send_sample():
@@ -79,10 +79,7 @@ def send_sample():
     root_logger.setLevel(logging.DEBUG)
 
     pipeline_manager = pipeline.setup_pipeline(
-        transformer.TransformerExtensionManager(
-            'ceilometer.transformer',
-        ),
-    )
+        extension.ExtensionManager('ceilometer.transformer'))
 
     with pipeline_manager.publisher(context.get_admin_context()) as p:
         p([sample.Sample(
diff --git a/ceilometer/notifier.py b/ceilometer/notifier.py
index 3490fcc6..f3240688 100644
--- a/ceilometer/notifier.py
+++ b/ceilometer/notifier.py
@@ -19,7 +19,6 @@ from stevedore import extension
 
 from ceilometer.i18n import _
 from ceilometer import pipeline
-from ceilometer import transformer
 
 
 LOG = logging.getLogger(__name__)
@@ -51,7 +50,7 @@ def _load_pipeline_manager():
     global _pipeline_manager
 
     _pipeline_manager = pipeline.setup_pipeline(
-        transformer.TransformerExtensionManager(
+        extension.ExtensionManager(
             'ceilometer.transformer',
         ),
     )
diff --git a/ceilometer/pipeline.py b/ceilometer/pipeline.py
index 9026dfed..0b4bf82a 100644
--- a/ceilometer/pipeline.py
+++ b/ceilometer/pipeline.py
@@ -25,14 +25,15 @@ from oslo_config import cfg
 from oslo_log import log
 from oslo_utils import timeutils
 import six
+from stevedore import extension
 import yaml
 
+
 from ceilometer.event.storage import models
 from ceilometer.i18n import _
 from ceilometer import publisher
 from ceilometer.publisher import utils as publisher_utils
 from ceilometer import sample as sample_util
-from ceilometer import transformer as xformer
 
 
 OPTS = [
@@ -376,7 +377,7 @@ class Sink(object):
         for transformer in self.transformer_cfg:
             parameter = transformer['parameters'] or {}
             try:
-                ext = transformer_manager.get_ext(transformer['name'])
+                ext = transformer_manager[transformer['name']]
             except KeyError:
                 raise PipelineException(
                     "No transformer named %s loaded" % transformer['name'],
@@ -732,7 +733,7 @@ def _setup_pipeline_manager(cfg_file, transformer_manager, p_type=SAMPLE_TYPE):
 
     return PipelineManager(pipeline_cfg,
                            transformer_manager or
-                           xformer.TransformerExtensionManager(
+                           extension.ExtensionManager(
                                'ceilometer.transformer',
                            ), p_type)
 
diff --git a/ceilometer/tests/agent/agentbase.py b/ceilometer/tests/agent/agentbase.py
index 51217b1d..ce0face9 100644
--- a/ceilometer/tests/agent/agentbase.py
+++ b/ceilometer/tests/agent/agentbase.py
@@ -37,7 +37,6 @@ from ceilometer import publisher
 from ceilometer.publisher import test as test_publisher
 from ceilometer import sample
 from ceilometer.tests import base
-from ceilometer import transformer
 from ceilometer import utils
 
 
@@ -173,7 +172,7 @@ class BaseAgentManagerTestCase(base.BaseTestCase):
         params = []
 
     def setup_pipeline(self):
-        self.transformer_manager = transformer.TransformerExtensionManager(
+        self.transformer_manager = extension.ExtensionManager(
             'ceilometer.transformer',
         )
         self.mgr.pipeline_manager = pipeline.PipelineManager(
diff --git a/ceilometer/tests/pipeline_base.py b/ceilometer/tests/pipeline_base.py
index 2e06dd4e..9f05ae78 100644
--- a/ceilometer/tests/pipeline_base.py
+++ b/ceilometer/tests/pipeline_base.py
@@ -138,18 +138,12 @@ class BasePipelineTestCase(base.BaseTestCase):
             resource_metadata={}
         )
 
-        self.useFixture(mockpatch.PatchObject(
-            transformer.TransformerExtensionManager, "__init__",
-            side_effect=self.fake_tem_init))
-
-        self.useFixture(mockpatch.PatchObject(
-            transformer.TransformerExtensionManager, "get_ext",
-            side_effect=self.fake_tem_get_ext))
-
         self.useFixture(mockpatch.PatchObject(
             publisher, 'get_publisher', side_effect=self.get_publisher))
 
-        self.transformer_manager = transformer.TransformerExtensionManager()
+        self.transformer_manager = mock.MagicMock()
+        self.transformer_manager.__getitem__.side_effect = \
+            self.fake_tem_get_ext
 
         self._setup_pipeline_cfg()
 
diff --git a/ceilometer/tests/test_notifier.py b/ceilometer/tests/test_notifier.py
index 0ccdb8ab..fb40ec84 100644
--- a/ceilometer/tests/test_notifier.py
+++ b/ceilometer/tests/test_notifier.py
@@ -15,10 +15,10 @@
 """Tests for ceilometer/notifier.py
 """
 from oslotest import base
+from stevedore import extension
 
 from ceilometer import notifier
 from ceilometer import pipeline
-from ceilometer import transformer
 
 
 MESSAGE = {
@@ -64,7 +64,7 @@ MESSAGE = {
 class TestNotifier(base.BaseTestCase):
 
     def test_process_notification(self):
-        transformer_manager = transformer.TransformerExtensionManager(
+        transformer_manager = extension.ExtensionManager(
             'ceilometer.transformer',
         )
         notifier._pipeline_manager = pipeline.PipelineManager(
diff --git a/ceilometer/transformer/__init__.py b/ceilometer/transformer/__init__.py
index 3df6d7f3..c3124c2e 100644
--- a/ceilometer/transformer/__init__.py
+++ b/ceilometer/transformer/__init__.py
@@ -17,22 +17,6 @@ import abc
 import collections
 
 import six
-from stevedore import extension
-
-
-class TransformerExtensionManager(extension.ExtensionManager):
-
-    def __init__(self, namespace):
-        super(TransformerExtensionManager, self).__init__(
-            namespace=namespace,
-            invoke_on_load=False,
-            invoke_args=(),
-            invoke_kwds={}
-        )
-        self.by_name = dict((e.name, e) for e in self.extensions)
-
-    def get_ext(self, name):
-        return self.by_name[name]
 
 
 @six.add_metaclass(abc.ABCMeta)