From 7316dd16b8850270db27c1298dcf5a2223f2f1e1 Mon Sep 17 00:00:00 2001
From: gordon chung <gord@live.ca>
Date: Wed, 3 Sep 2014 16:21:46 -0400
Subject: sync oslo code

- sync code up to Change-Id: Ie6064e73abe4b0729498a0343d50e1be35684b75
- includes fix to resolve alarm-evaluator failure
- does not include openstack/common/strutils sync as it requires
  test update

Co-Authored-By: Vaibhav Kale <vaibhav_kale@persistent.co.in>
Closes-Bug: #1357343
Change-Id: Ieec08520cb39c5bf2e795dfeb3e36e52c6fd2a82
---
 .../openstack/common/apiclient/auth.py             |  10 +-
 .../openstack/common/apiclient/base.py             |  63 ++-
 .../openstack/common/apiclient/client.py           |  21 +-
 .../openstack/common/apiclient/exceptions.py       |  98 ++--
 .../openstack/common/apiclient/fake_client.py      |   6 +-
 ceilometerclient/openstack/common/cliutils.py      | 128 ++++-
 ceilometerclient/openstack/common/gettextutils.py  | 592 ++++++++++++---------
 ceilometerclient/openstack/common/importutils.py   |  11 +-
 ceilometerclient/openstack/common/uuidutils.py     |  37 ++
 tools/install_venv_common.py                       |   2 +-
 10 files changed, 643 insertions(+), 325 deletions(-)
 create mode 100644 ceilometerclient/openstack/common/uuidutils.py

diff --git a/ceilometerclient/openstack/common/apiclient/auth.py b/ceilometerclient/openstack/common/apiclient/auth.py
index df9b674..2d9babe 100644
--- a/ceilometerclient/openstack/common/apiclient/auth.py
+++ b/ceilometerclient/openstack/common/apiclient/auth.py
@@ -19,7 +19,6 @@
 
 import abc
 import argparse
-import logging
 import os
 
 import six
@@ -28,9 +27,6 @@ from stevedore import extension
 from ceilometerclient.openstack.common.apiclient import exceptions
 
 
-logger = logging.getLogger(__name__)
-
-
 _discovered_plugins = {}
 
 
@@ -80,7 +76,7 @@ def load_plugin_from_args(args):
     alphabetical order.
 
     :type args: argparse.Namespace
-    :raises: AuthorizationFailure
+    :raises: AuthPluginOptionsMissing
     """
     auth_system = args.os_auth_system
     if auth_system:
@@ -217,8 +213,8 @@ class BaseAuthPlugin(object):
         :type service_type: string
         :param endpoint_type: Type of endpoint.
                               Possible values: public or publicURL,
-                                  internal or internalURL,
-                                  admin or adminURL
+                              internal or internalURL,
+                              admin or adminURL
         :type endpoint_type: string
         :returns: tuple of token and endpoint strings
         :raises: EndpointException
diff --git a/ceilometerclient/openstack/common/apiclient/base.py b/ceilometerclient/openstack/common/apiclient/base.py
index f8531f8..b5394f8 100644
--- a/ceilometerclient/openstack/common/apiclient/base.py
+++ b/ceilometerclient/openstack/common/apiclient/base.py
@@ -24,11 +24,13 @@ Base utilities to build API operation managers and objects on top of.
 # pylint: disable=E1102
 
 import abc
+import copy
 
 import six
 from six.moves.urllib import parse
 
 from ceilometerclient.openstack.common.apiclient import exceptions
+from ceilometerclient.openstack.common.gettextutils import _
 from ceilometerclient.openstack.common import strutils
 
 
@@ -73,8 +75,8 @@ class HookableMixin(object):
 
         :param cls: class that registers hooks
         :param hook_type: hook type, e.g., '__pre_parse_args__'
-        :param **args: args to be passed to every hook function
-        :param **kwargs: kwargs to be passed to every hook function
+        :param args: args to be passed to every hook function
+        :param kwargs: kwargs to be passed to every hook function
         """
         hook_funcs = cls._hooks_map.get(hook_type) or []
         for hook_func in hook_funcs:
@@ -97,12 +99,13 @@ class BaseManager(HookableMixin):
         super(BaseManager, self).__init__()
         self.client = client
 
-    def _list(self, url, response_key, obj_class=None, json=None):
+    def _list(self, url, response_key=None, obj_class=None, json=None):
         """List the collection.
 
         :param url: a partial URL, e.g., '/servers'
         :param response_key: the key to be looked up in response dictionary,
-            e.g., 'servers'
+            e.g., 'servers'. If response_key is None - all response body
+            will be used.
         :param obj_class: class for constructing the returned objects
             (self.resource_class will be used by default)
         :param json: data that will be encoded as JSON and passed in POST
@@ -116,7 +119,7 @@ class BaseManager(HookableMixin):
         if obj_class is None:
             obj_class = self.resource_class
 
-        data = body[response_key]
+        data = body[response_key] if response_key is not None else body
         # NOTE(ja): keystone returns values as list as {'values': [ ... ]}
         #           unlike other services which just return the list...
         try:
@@ -126,15 +129,17 @@ class BaseManager(HookableMixin):
 
         return [obj_class(self, res, loaded=True) for res in data if res]
 
-    def _get(self, url, response_key):
+    def _get(self, url, response_key=None):
         """Get an object from collection.
 
         :param url: a partial URL, e.g., '/servers'
         :param response_key: the key to be looked up in response dictionary,
-            e.g., 'server'
+            e.g., 'server'. If response_key is None - all response body
+            will be used.
         """
         body = self.client.get(url).json()
-        return self.resource_class(self, body[response_key], loaded=True)
+        data = body[response_key] if response_key is not None else body
+        return self.resource_class(self, data, loaded=True)
 
     def _head(self, url):
         """Retrieve request headers for an object.
@@ -144,21 +149,23 @@ class BaseManager(HookableMixin):
         resp = self.client.head(url)
         return resp.status_code == 204
 
-    def _post(self, url, json, response_key, return_raw=False):
+    def _post(self, url, json, response_key=None, return_raw=False):
         """Create an object.
 
         :param url: a partial URL, e.g., '/servers'
         :param json: data that will be encoded as JSON and passed in POST
             request (GET will be sent by default)
         :param response_key: the key to be looked up in response dictionary,
-            e.g., 'servers'
+            e.g., 'server'. If response_key is None - all response body
+            will be used.
         :param return_raw: flag to force returning raw JSON instead of
             Python object of self.resource_class
         """
         body = self.client.post(url, json=json).json()
+        data = body[response_key] if response_key is not None else body
         if return_raw:
-            return body[response_key]
-        return self.resource_class(self, body[response_key])
+            return data
+        return self.resource_class(self, data)
 
     def _put(self, url, json=None, response_key=None):
         """Update an object with PUT method.
@@ -167,7 +174,8 @@ class BaseManager(HookableMixin):
         :param json: data that will be encoded as JSON and passed in POST
             request (GET will be sent by default)
         :param response_key: the key to be looked up in response dictionary,
-            e.g., 'servers'
+            e.g., 'servers'. If response_key is None - all response body
+            will be used.
         """
         resp = self.client.put(url, json=json)
         # PUT requests may not return a body
@@ -185,7 +193,8 @@ class BaseManager(HookableMixin):
         :param json: data that will be encoded as JSON and passed in POST
             request (GET will be sent by default)
         :param response_key: the key to be looked up in response dictionary,
-            e.g., 'servers'
+            e.g., 'servers'. If response_key is None - all response body
+            will be used.
         """
         body = self.client.patch(url, json=json).json()
         if response_key is not None:
@@ -218,7 +227,10 @@ class ManagerWithFind(BaseManager):
         matches = self.findall(**kwargs)
         num_matches = len(matches)
         if num_matches == 0:
-            msg = "No %s matching %s." % (self.resource_class.__name__, kwargs)
+            msg = _("No %(name)s matching %(args)s.") % {
+                'name': self.resource_class.__name__,
+                'args': kwargs
+            }
             raise exceptions.NotFound(msg)
         elif num_matches > 1:
             raise exceptions.NoUniqueMatch()
@@ -372,7 +384,10 @@ class CrudManager(BaseManager):
         num = len(rl)
 
         if num == 0:
-            msg = "No %s matching %s." % (self.resource_class.__name__, kwargs)
+            msg = _("No %(name)s matching %(args)s.") % {
+                'name': self.resource_class.__name__,
+                'args': kwargs
+            }
             raise exceptions.NotFound(404, msg)
         elif num > 1:
             raise exceptions.NoUniqueMatch
@@ -440,8 +455,10 @@ class Resource(object):
     def human_id(self):
         """Human-readable ID which can be used for bash completion.
         """
-        if self.NAME_ATTR in self.__dict__ and self.HUMAN_ID:
-            return strutils.to_slug(getattr(self, self.NAME_ATTR))
+        if self.HUMAN_ID:
+            name = getattr(self, self.NAME_ATTR, None)
+            if name is not None:
+                return strutils.to_slug(name)
         return None
 
     def _add_details(self, info):
@@ -455,7 +472,7 @@ class Resource(object):
 
     def __getattr__(self, k):
         if k not in self.__dict__:
-            #NOTE(bcwaldon): disallow lazy-loading if already loaded once
+            # NOTE(bcwaldon): disallow lazy-loading if already loaded once
             if not self.is_loaded():
                 self.get()
                 return self.__getattr__(k)
@@ -465,6 +482,11 @@ class Resource(object):
             return self.__dict__[k]
 
     def get(self):
+        """Support for lazy loading details.
+
+        Some clients, such as novaclient have the option to lazy load the
+        details, details which can be loaded with this function.
+        """
         # set_loaded() first ... so if we have to bail, we know we tried.
         self.set_loaded(True)
         if not hasattr(self.manager, 'get'):
@@ -489,3 +511,6 @@ class Resource(object):
 
     def set_loaded(self, val):
         self._loaded = val
+
+    def to_dict(self):
+        return copy.deepcopy(self._info)
diff --git a/ceilometerclient/openstack/common/apiclient/client.py b/ceilometerclient/openstack/common/apiclient/client.py
index 1b68aa9..bb17b0c 100644
--- a/ceilometerclient/openstack/common/apiclient/client.py
+++ b/ceilometerclient/openstack/common/apiclient/client.py
@@ -36,6 +36,7 @@ except ImportError:
 import requests
 
 from ceilometerclient.openstack.common.apiclient import exceptions
+from ceilometerclient.openstack.common.gettextutils import _
 from ceilometerclient.openstack.common import importutils
 
 
@@ -46,6 +47,7 @@ class HTTPClient(object):
     """This client handles sending HTTP requests to OpenStack servers.
 
     Features:
+
     - share authentication information between several clients to different
       services (e.g., for compute and image clients);
     - reissue authentication request for expired tokens;
@@ -151,10 +153,10 @@ class HTTPClient(object):
         :param method: method of HTTP request
         :param url: URL of HTTP request
         :param kwargs: any other parameter that can be passed to
-'            requests.Session.request (such as `headers`) or `json`
+             requests.Session.request (such as `headers`) or `json`
              that will be encoded as JSON and used as `data` argument
         """
-        kwargs.setdefault("headers", kwargs.get("headers", {}))
+        kwargs.setdefault("headers", {})
         kwargs["headers"]["User-Agent"] = self.user_agent
         if self.original_ip:
             kwargs["headers"]["Forwarded"] = "for=%s;by=%s" % (
@@ -206,7 +208,7 @@ class HTTPClient(object):
         :param method: method of HTTP request
         :param url: URL of HTTP request
         :param kwargs: any other parameter that can be passed to
-'            `HTTPClient.request`
+            `HTTPClient.request`
         """
 
         filter_args = {
@@ -228,7 +230,7 @@ class HTTPClient(object):
                     **filter_args)
                 if not (token and endpoint):
                     raise exceptions.AuthorizationFailure(
-                        "Cannot find endpoint or token for request")
+                        _("Cannot find endpoint or token for request"))
 
         old_token_endpoint = (token, endpoint)
         kwargs.setdefault("headers", {})["X-Auth-Token"] = token
@@ -245,6 +247,10 @@ class HTTPClient(object):
                 raise
             self.cached_token = None
             client.cached_endpoint = None
+            if self.auth_plugin.opts.get('token'):
+                self.auth_plugin.opts['token'] = None
+            if self.auth_plugin.opts.get('endpoint'):
+                self.auth_plugin.opts['endpoint'] = None
             self.authenticate()
             try:
                 token, endpoint = self.auth_plugin.token_and_endpoint(
@@ -351,8 +357,11 @@ class BaseClient(object):
         try:
             client_path = version_map[str(version)]
         except (KeyError, ValueError):
-            msg = "Invalid %s client version '%s'. must be one of: %s" % (
-                  (api_name, version, ', '.join(version_map.keys())))
+            msg = _("Invalid %(api_name)s client version '%(version)s'. "
+                    "Must be one of: %(version_map)s") % {
+                        'api_name': api_name,
+                        'version': version,
+                        'version_map': ', '.join(version_map.keys())}
             raise exceptions.UnsupportedVersion(msg)
 
         return importutils.import_class(client_path)
diff --git a/ceilometerclient/openstack/common/apiclient/exceptions.py b/ceilometerclient/openstack/common/apiclient/exceptions.py
index 4776d58..2f68ffb 100644
--- a/ceilometerclient/openstack/common/apiclient/exceptions.py
+++ b/ceilometerclient/openstack/common/apiclient/exceptions.py
@@ -25,6 +25,8 @@ import sys
 
 import six
 
+from ceilometerclient.openstack.common.gettextutils import _
+
 
 class ClientException(Exception):
     """The base exception class for all exceptions this library raises.
@@ -36,7 +38,7 @@ class MissingArgs(ClientException):
     """Supplied arguments are not sufficient for calling a function."""
     def __init__(self, missing):
         self.missing = missing
-        msg = "Missing argument(s): %s" % ", ".join(missing)
+        msg = _("Missing arguments: %s") % ", ".join(missing)
         super(MissingArgs, self).__init__(msg)
 
 
@@ -69,16 +71,16 @@ class AuthPluginOptionsMissing(AuthorizationFailure):
     """Auth plugin misses some options."""
     def __init__(self, opt_names):
         super(AuthPluginOptionsMissing, self).__init__(
-            "Authentication failed. Missing options: %s" %
+            _("Authentication failed. Missing options: %s") %
             ", ".join(opt_names))
         self.opt_names = opt_names
 
 
 class AuthSystemNotFound(AuthorizationFailure):
-    """User has specified a AuthSystem that is not installed."""
+    """User has specified an AuthSystem that is not installed."""
     def __init__(self, auth_system):
         super(AuthSystemNotFound, self).__init__(
-            "AuthSystemNotFound: %s" % repr(auth_system))
+            _("AuthSystemNotFound: %s") % repr(auth_system))
         self.auth_system = auth_system
 
 
@@ -101,7 +103,7 @@ class AmbiguousEndpoints(EndpointException):
     """Found more than one matching endpoint in Service Catalog."""
     def __init__(self, endpoints=None):
         super(AmbiguousEndpoints, self).__init__(
-            "AmbiguousEndpoints: %s" % repr(endpoints))
+            _("AmbiguousEndpoints: %s") % repr(endpoints))
         self.endpoints = endpoints
 
 
@@ -109,7 +111,7 @@ class HttpError(ClientException):
     """The base exception class for all HTTP exceptions.
     """
     http_status = 0
-    message = "HTTP Error"
+    message = _("HTTP Error")
 
     def __init__(self, message=None, details=None,
                  response=None, request_id=None,
@@ -127,12 +129,17 @@ class HttpError(ClientException):
         super(HttpError, self).__init__(formatted_string)
 
 
+class HTTPRedirection(HttpError):
+    """HTTP Redirection."""
+    message = _("HTTP Redirection")
+
+
 class HTTPClientError(HttpError):
     """Client-side HTTP error.
 
     Exception for cases in which the client seems to have erred.
     """
-    message = "HTTP Client Error"
+    message = _("HTTP Client Error")
 
 
 class HttpServerError(HttpError):
@@ -141,7 +148,17 @@ class HttpServerError(HttpError):
     Exception for cases in which the server is aware that it has
     erred or is incapable of performing the request.
     """
-    message = "HTTP Server Error"
+    message = _("HTTP Server Error")
+
+
+class MultipleChoices(HTTPRedirection):
+    """HTTP 300 - Multiple Choices.
+
+    Indicates multiple options for the resource that the client may follow.
+    """
+
+    http_status = 300
+    message = _("Multiple Choices")
 
 
 class BadRequest(HTTPClientError):
@@ -150,7 +167,7 @@ class BadRequest(HTTPClientError):
     The request cannot be fulfilled due to bad syntax.
     """
     http_status = 400
-    message = "Bad Request"
+    message = _("Bad Request")
 
 
 class Unauthorized(HTTPClientError):
@@ -160,7 +177,7 @@ class Unauthorized(HTTPClientError):
     is required and has failed or has not yet been provided.
     """
     http_status = 401
-    message = "Unauthorized"
+    message = _("Unauthorized")
 
 
 class PaymentRequired(HTTPClientError):
@@ -169,7 +186,7 @@ class PaymentRequired(HTTPClientError):
     Reserved for future use.
     """
     http_status = 402
-    message = "Payment Required"
+    message = _("Payment Required")
 
 
 class Forbidden(HTTPClientError):
@@ -179,7 +196,7 @@ class Forbidden(HTTPClientError):
     to it.
     """
     http_status = 403
-    message = "Forbidden"
+    message = _("Forbidden")
 
 
 class NotFound(HTTPClientError):
@@ -189,7 +206,7 @@ class NotFound(HTTPClientError):
     in the future.
     """
     http_status = 404
-    message = "Not Found"
+    message = _("Not Found")
 
 
 class MethodNotAllowed(HTTPClientError):
@@ -199,7 +216,7 @@ class MethodNotAllowed(HTTPClientError):
     by that resource.
     """
     http_status = 405
-    message = "Method Not Allowed"
+    message = _("Method Not Allowed")
 
 
 class NotAcceptable(HTTPClientError):
@@ -209,7 +226,7 @@ class NotAcceptable(HTTPClientError):
     acceptable according to the Accept headers sent in the request.
     """
     http_status = 406
-    message = "Not Acceptable"
+    message = _("Not Acceptable")
 
 
 class ProxyAuthenticationRequired(HTTPClientError):
@@ -218,7 +235,7 @@ class ProxyAuthenticationRequired(HTTPClientError):
     The client must first authenticate itself with the proxy.
     """
     http_status = 407
-    message = "Proxy Authentication Required"
+    message = _("Proxy Authentication Required")
 
 
 class RequestTimeout(HTTPClientError):
@@ -227,7 +244,7 @@ class RequestTimeout(HTTPClientError):
     The server timed out waiting for the request.
     """
     http_status = 408
-    message = "Request Timeout"
+    message = _("Request Timeout")
 
 
 class Conflict(HTTPClientError):
@@ -237,7 +254,7 @@ class Conflict(HTTPClientError):
     in the request, such as an edit conflict.
     """
     http_status = 409
-    message = "Conflict"
+    message = _("Conflict")
 
 
 class Gone(HTTPClientError):
@@ -247,7 +264,7 @@ class Gone(HTTPClientError):
     not be available again.
     """
     http_status = 410
-    message = "Gone"
+    message = _("Gone")
 
 
 class LengthRequired(HTTPClientError):
@@ -257,7 +274,7 @@ class LengthRequired(HTTPClientError):
     required by the requested resource.
     """
     http_status = 411
-    message = "Length Required"
+    message = _("Length Required")
 
 
 class PreconditionFailed(HTTPClientError):
@@ -267,7 +284,7 @@ class PreconditionFailed(HTTPClientError):
     put on the request.
     """
     http_status = 412
-    message = "Precondition Failed"
+    message = _("Precondition Failed")
 
 
 class RequestEntityTooLarge(HTTPClientError):
@@ -276,7 +293,7 @@ class RequestEntityTooLarge(HTTPClientError):
     The request is larger than the server is willing or able to process.
     """
     http_status = 413
-    message = "Request Entity Too Large"
+    message = _("Request Entity Too Large")
 
     def __init__(self, *args, **kwargs):
         try:
@@ -293,7 +310,7 @@ class RequestUriTooLong(HTTPClientError):
     The URI provided was too long for the server to process.
     """
     http_status = 414
-    message = "Request-URI Too Long"
+    message = _("Request-URI Too Long")
 
 
 class UnsupportedMediaType(HTTPClientError):
@@ -303,7 +320,7 @@ class UnsupportedMediaType(HTTPClientError):
     not support.
     """
     http_status = 415
-    message = "Unsupported Media Type"
+    message = _("Unsupported Media Type")
 
 
 class RequestedRangeNotSatisfiable(HTTPClientError):
@@ -313,7 +330,7 @@ class RequestedRangeNotSatisfiable(HTTPClientError):
     supply that portion.
     """
     http_status = 416
-    message = "Requested Range Not Satisfiable"
+    message = _("Requested Range Not Satisfiable")
 
 
 class ExpectationFailed(HTTPClientError):
@@ -322,7 +339,7 @@ class ExpectationFailed(HTTPClientError):
     The server cannot meet the requirements of the Expect request-header field.
     """
     http_status = 417
-    message = "Expectation Failed"
+    message = _("Expectation Failed")
 
 
 class UnprocessableEntity(HTTPClientError):
@@ -332,7 +349,7 @@ class UnprocessableEntity(HTTPClientError):
     errors.
     """
     http_status = 422
-    message = "Unprocessable Entity"
+    message = _("Unprocessable Entity")
 
 
 class InternalServerError(HttpServerError):
@@ -341,7 +358,7 @@ class InternalServerError(HttpServerError):
     A generic error message, given when no more specific message is suitable.
     """
     http_status = 500
-    message = "Internal Server Error"
+    message = _("Internal Server Error")
 
 
 # NotImplemented is a python keyword.
@@ -352,7 +369,7 @@ class HttpNotImplemented(HttpServerError):
     the ability to fulfill the request.
     """
     http_status = 501
-    message = "Not Implemented"
+    message = _("Not Implemented")
 
 
 class BadGateway(HttpServerError):
@@ -362,7 +379,7 @@ class BadGateway(HttpServerError):
     response from the upstream server.
     """
     http_status = 502
-    message = "Bad Gateway"
+    message = _("Bad Gateway")
 
 
 class ServiceUnavailable(HttpServerError):
@@ -371,7 +388,7 @@ class ServiceUnavailable(HttpServerError):
     The server is currently unavailable.
     """
     http_status = 503
-    message = "Service Unavailable"
+    message = _("Service Unavailable")
 
 
 class GatewayTimeout(HttpServerError):
@@ -381,7 +398,7 @@ class GatewayTimeout(HttpServerError):
     response from the upstream server.
     """
     http_status = 504
-    message = "Gateway Timeout"
+    message = _("Gateway Timeout")
 
 
 class HttpVersionNotSupported(HttpServerError):
@@ -390,7 +407,7 @@ class HttpVersionNotSupported(HttpServerError):
     The server does not support the HTTP protocol version used in the request.
     """
     http_status = 505
-    message = "HTTP Version Not Supported"
+    message = _("HTTP Version Not Supported")
 
 
 # _code_map contains all the classes that have http_status attribute.
@@ -408,12 +425,17 @@ def from_response(response, method, url):
     :param method: HTTP method used for request
     :param url: URL used for request
     """
+
+    req_id = response.headers.get("x-openstack-request-id")
+    # NOTE(hdd) true for older versions of nova and cinder
+    if not req_id:
+        req_id = response.headers.get("x-compute-request-id")
     kwargs = {
         "http_status": response.status_code,
         "response": response,
         "method": method,
         "url": url,
-        "request_id": response.headers.get("x-compute-request-id"),
+        "request_id": req_id,
     }
     if "retry-after" in response.headers:
         kwargs["retry_after"] = response.headers["retry-after"]
@@ -425,10 +447,10 @@ def from_response(response, method, url):
         except ValueError:
             pass
         else:
-            if hasattr(body, "keys"):
-                error = body[body.keys()[0]]
-                kwargs["message"] = error.get("message", None)
-                kwargs["details"] = error.get("details", None)
+            if isinstance(body, dict) and isinstance(body.get("error"), dict):
+                error = body["error"]
+                kwargs["message"] = error.get("message")
+                kwargs["details"] = error.get("details")
     elif content_type.startswith("text/"):
         kwargs["details"] = response.text
 
diff --git a/ceilometerclient/openstack/common/apiclient/fake_client.py b/ceilometerclient/openstack/common/apiclient/fake_client.py
index e99947b..24807ad 100644
--- a/ceilometerclient/openstack/common/apiclient/fake_client.py
+++ b/ceilometerclient/openstack/common/apiclient/fake_client.py
@@ -33,7 +33,9 @@ from six.moves.urllib import parse
 from ceilometerclient.openstack.common.apiclient import client
 
 
-def assert_has_keys(dct, required=[], optional=[]):
+def assert_has_keys(dct, required=None, optional=None):
+    required = required or []
+    optional = optional or []
     for k in required:
         try:
             assert k in dct
@@ -79,7 +81,7 @@ class FakeHTTPClient(client.HTTPClient):
     def __init__(self, *args, **kwargs):
         self.callstack = []
         self.fixtures = kwargs.pop("fixtures", None) or {}
-        if not args and not "auth_plugin" in kwargs:
+        if not args and "auth_plugin" not in kwargs:
             args = (None, )
         super(FakeHTTPClient, self).__init__(*args, **kwargs)
 
diff --git a/ceilometerclient/openstack/common/cliutils.py b/ceilometerclient/openstack/common/cliutils.py
index 96725ed..c690028 100644
--- a/ceilometerclient/openstack/common/cliutils.py
+++ b/ceilometerclient/openstack/common/cliutils.py
@@ -16,6 +16,8 @@
 # W0621: Redefining name %s from outer scope
 # pylint: disable=W0603,W0621
 
+from __future__ import print_function
+
 import getpass
 import inspect
 import os
@@ -27,7 +29,9 @@ import six
 from six import moves
 
 from ceilometerclient.openstack.common.apiclient import exceptions
+from ceilometerclient.openstack.common.gettextutils import _
 from ceilometerclient.openstack.common import strutils
+from ceilometerclient.openstack.common import uuidutils
 
 
 def validate_args(fn, *args, **kwargs):
@@ -52,7 +56,7 @@ def validate_args(fn, *args, **kwargs):
     required_args = argspec.args[:len(argspec.args) - num_defaults]
 
     def isbound(method):
-        return getattr(method, 'im_self', None) is not None
+        return getattr(method, '__self__', None) is not None
 
     if isbound(fn):
         required_args.pop(0)
@@ -84,7 +88,7 @@ def env(*args, **kwargs):
     If all are empty, defaults to '' or keyword arg `default`.
     """
     for arg in args:
-        value = os.environ.get(arg, None)
+        value = os.environ.get(arg)
         if value:
             return value
     return kwargs.get('default', '')
@@ -128,7 +132,7 @@ def isunauthenticated(func):
 
 
 def print_list(objs, fields, formatters=None, sortby_index=0,
-               mixed_case_fields=None):
+               mixed_case_fields=None, field_labels=None):
     """Print a list or objects as a table, one row per object.
 
     :param objs: iterable of :class:`Resource`
@@ -137,14 +141,22 @@ def print_list(objs, fields, formatters=None, sortby_index=0,
     :param sortby_index: index of the field for sorting table rows
     :param mixed_case_fields: fields corresponding to object attributes that
         have mixed case names (e.g., 'serverId')
+    :param field_labels: Labels to use in the heading of the table, default to
+        fields.
     """
     formatters = formatters or {}
     mixed_case_fields = mixed_case_fields or []
+    field_labels = field_labels or fields
+    if len(field_labels) != len(fields):
+        raise ValueError(_("Field labels list %(labels)s has different number "
+                           "of elements than fields list %(fields)s"),
+                         {'labels': field_labels, 'fields': fields})
+
     if sortby_index is None:
         kwargs = {}
     else:
-        kwargs = {'sortby': fields[sortby_index]}
-    pt = prettytable.PrettyTable(fields, caching=False)
+        kwargs = {'sortby': field_labels[sortby_index]}
+    pt = prettytable.PrettyTable(field_labels, caching=False)
     pt.align = 'l'
 
     for o in objs:
@@ -176,9 +188,9 @@ def print_dict(dct, dict_property="Property", wrap=0):
     for k, v in six.iteritems(dct):
         # convert dict to str to check length
         if isinstance(v, dict):
-            v = str(v)
+            v = six.text_type(v)
         if wrap > 0:
-            v = textwrap.fill(str(v), wrap)
+            v = textwrap.fill(six.text_type(v), wrap)
         # if value has a newline, add in multiple rows
         # e.g. fault with stacktrace
         if v and isinstance(v, six.string_types) and r'\n' in v:
@@ -199,7 +211,7 @@ def get_password(max_password_prompts=3):
     if hasattr(sys.stdin, "isatty") and sys.stdin.isatty():
         # Check for Ctrl-D
         try:
-            for _ in moves.range(max_password_prompts):
+            for __ in moves.range(max_password_prompts):
                 pw1 = getpass.getpass("OS Password: ")
                 if verify:
                     pw2 = getpass.getpass("Please verify: ")
@@ -211,3 +223,103 @@ def get_password(max_password_prompts=3):
         except EOFError:
             pass
     return pw
+
+
+def find_resource(manager, name_or_id, **find_args):
+    """Look for resource in a given manager.
+
+    Used as a helper for the _find_* methods.
+    Example:
+
+    .. code-block:: python
+
+        def _find_hypervisor(cs, hypervisor):
+            #Get a hypervisor by name or ID.
+            return cliutils.find_resource(cs.hypervisors, hypervisor)
+    """
+    # first try to get entity as integer id
+    try:
+        return manager.get(int(name_or_id))
+    except (TypeError, ValueError, exceptions.NotFound):
+        pass
+
+    # now try to get entity as uuid
+    try:
+        if six.PY2:
+            tmp_id = strutils.safe_encode(name_or_id)
+        else:
+            tmp_id = strutils.safe_decode(name_or_id)
+
+        if uuidutils.is_uuid_like(tmp_id):
+            return manager.get(tmp_id)
+    except (TypeError, ValueError, exceptions.NotFound):
+        pass
+
+    # for str id which is not uuid
+    if getattr(manager, 'is_alphanum_id_allowed', False):
+        try:
+            return manager.get(name_or_id)
+        except exceptions.NotFound:
+            pass
+
+    try:
+        try:
+            return manager.find(human_id=name_or_id, **find_args)
+        except exceptions.NotFound:
+            pass
+
+        # finally try to find entity by name
+        try:
+            resource = getattr(manager, 'resource_class', None)
+            name_attr = resource.NAME_ATTR if resource else 'name'
+            kwargs = {name_attr: name_or_id}
+            kwargs.update(find_args)
+            return manager.find(**kwargs)
+        except exceptions.NotFound:
+            msg = _("No %(name)s with a name or "
+                    "ID of '%(name_or_id)s' exists.") % \
+                {
+                    "name": manager.resource_class.__name__.lower(),
+                    "name_or_id": name_or_id
+                }
+            raise exceptions.CommandError(msg)
+    except exceptions.NoUniqueMatch:
+        msg = _("Multiple %(name)s matches found for "
+                "'%(name_or_id)s', use an ID to be more specific.") % \
+            {
+                "name": manager.resource_class.__name__.lower(),
+                "name_or_id": name_or_id
+            }
+        raise exceptions.CommandError(msg)
+
+
+def service_type(stype):
+    """Adds 'service_type' attribute to decorated function.
+
+    Usage:
+
+    .. code-block:: python
+
+       @service_type('volume')
+       def mymethod(f):
+       ...
+    """
+    def inner(f):
+        f.service_type = stype
+        return f
+    return inner
+
+
+def get_service_type(f):
+    """Retrieves service type from function."""
+    return getattr(f, 'service_type', None)
+
+
+def pretty_choice_list(l):
+    return ', '.join("'%s'" % i for i in l)
+
+
+def exit(msg=''):
+    if msg:
+        print (msg, file=sys.stderr)
+    sys.exit(1)
diff --git a/ceilometerclient/openstack/common/gettextutils.py b/ceilometerclient/openstack/common/gettextutils.py
index c28d730..75082d7 100644
--- a/ceilometerclient/openstack/common/gettextutils.py
+++ b/ceilometerclient/openstack/common/gettextutils.py
@@ -24,24 +24,122 @@ Usual usage in an openstack.common module:
 
 import copy
 import gettext
-import logging
+import locale
+from logging import handlers
 import os
-import re
-try:
-    import UserString as _userString
-except ImportError:
-    import collections as _userString
 
 from babel import localedata
 import six
 
-_localedir = os.environ.get('ceilometerclient'.upper() + '_LOCALEDIR')
-_t = gettext.translation('ceilometerclient', localedir=_localedir, fallback=True)
-
 _AVAILABLE_LANGUAGES = {}
+
+# FIXME(dhellmann): Remove this when moving to oslo.i18n.
 USE_LAZY = False
 
 
+class TranslatorFactory(object):
+    """Create translator functions
+    """
+
+    def __init__(self, domain, localedir=None):
+        """Establish a set of translation functions for the domain.
+
+        :param domain: Name of translation domain,
+                       specifying a message catalog.
+        :type domain: str
+        :param lazy: Delays translation until a message is emitted.
+                     Defaults to False.
+        :type lazy: Boolean
+        :param localedir: Directory with translation catalogs.
+        :type localedir: str
+        """
+        self.domain = domain
+        if localedir is None:
+            localedir = os.environ.get(domain.upper() + '_LOCALEDIR')
+        self.localedir = localedir
+
+    def _make_translation_func(self, domain=None):
+        """Return a new translation function ready for use.
+
+        Takes into account whether or not lazy translation is being
+        done.
+
+        The domain can be specified to override the default from the
+        factory, but the localedir from the factory is always used
+        because we assume the log-level translation catalogs are
+        installed in the same directory as the main application
+        catalog.
+
+        """
+        if domain is None:
+            domain = self.domain
+        t = gettext.translation(domain,
+                                localedir=self.localedir,
+                                fallback=True)
+        # Use the appropriate method of the translation object based
+        # on the python version.
+        m = t.gettext if six.PY3 else t.ugettext
+
+        def f(msg):
+            """oslo.i18n.gettextutils translation function."""
+            if USE_LAZY:
+                return Message(msg, domain=domain)
+            return m(msg)
+        return f
+
+    @property
+    def primary(self):
+        "The default translation function."
+        return self._make_translation_func()
+
+    def _make_log_translation_func(self, level):
+        return self._make_translation_func(self.domain + '-log-' + level)
+
+    @property
+    def log_info(self):
+        "Translate info-level log messages."
+        return self._make_log_translation_func('info')
+
+    @property
+    def log_warning(self):
+        "Translate warning-level log messages."
+        return self._make_log_translation_func('warning')
+
+    @property
+    def log_error(self):
+        "Translate error-level log messages."
+        return self._make_log_translation_func('error')
+
+    @property
+    def log_critical(self):
+        "Translate critical-level log messages."
+        return self._make_log_translation_func('critical')
+
+
+# NOTE(dhellmann): When this module moves out of the incubator into
+# oslo.i18n, these global variables can be moved to an integration
+# module within each application.
+
+# Create the global translation functions.
+_translators = TranslatorFactory('ceilometerclient')
+
+# The primary translation function using the well-known name "_"
+_ = _translators.primary
+
+# Translators for log levels.
+#
+# The abbreviated names are meant to reflect the usual use of a short
+# name like '_'. The "L" is for "log" and the other letter comes from
+# the level.
+_LI = _translators.log_info
+_LW = _translators.log_warning
+_LE = _translators.log_error
+_LC = _translators.log_critical
+
+# NOTE(dhellmann): End of globals that will move to the application's
+# integration module.
+
+
 def enable_lazy():
     """Convenience function for configuring _() to use lazy gettext
 
@@ -54,16 +152,7 @@ def enable_lazy():
     USE_LAZY = True
 
 
-def _(msg):
-    if USE_LAZY:
-        return Message(msg, 'ceilometerclient')
-    else:
-        if six.PY3:
-            return _t.gettext(msg)
-        return _t.ugettext(msg)
-
-
-def install(domain, lazy=False):
+def install(domain):
     """Install a _() function using the given translation domain.
 
     Given a translation domain, install a _() function using gettext's
@@ -74,226 +163,155 @@ def install(domain, lazy=False):
     a translation-domain-specific environment variable (e.g.
     NOVA_LOCALEDIR).
 
+    Note that to enable lazy translation, enable_lazy must be
+    called.
+
     :param domain: the translation domain
-    :param lazy: indicates whether or not to install the lazy _() function.
-                 The lazy _() introduces a way to do deferred translation
-                 of messages by installing a _ that builds Message objects,
-                 instead of strings, which can then be lazily translated into
-                 any available locale.
     """
-    if lazy:
-        # NOTE(mrodden): Lazy gettext functionality.
-        #
-        # The following introduces a deferred way to do translations on
-        # messages in OpenStack. We override the standard _() function
-        # and % (format string) operation to build Message objects that can
-        # later be translated when we have more information.
-        #
-        # Also included below is an example LocaleHandler that translates
-        # Messages to an associated locale, effectively allowing many logs,
-        # each with their own locale.
-
-        def _lazy_gettext(msg):
-            """Create and return a Message object.
-
-            Lazy gettext function for a given domain, it is a factory method
-            for a project/module to get a lazy gettext function for its own
-            translation domain (i.e. nova, glance, cinder, etc.)
-
-            Message encapsulates a string so that we can translate
-            it later when needed.
-            """
-            return Message(msg, domain)
-
-        from six import moves
-        moves.builtins.__dict__['_'] = _lazy_gettext
-    else:
-        localedir = '%s_LOCALEDIR' % domain.upper()
-        if six.PY3:
-            gettext.install(domain,
-                            localedir=os.environ.get(localedir))
-        else:
-            gettext.install(domain,
-                            localedir=os.environ.get(localedir),
-                            unicode=True)
-
-
-class Message(_userString.UserString, object):
-    """Class used to encapsulate translatable messages."""
-    def __init__(self, msg, domain):
-        # _msg is the gettext msgid and should never change
-        self._msg = msg
-        self._left_extra_msg = ''
-        self._right_extra_msg = ''
-        self._locale = None
-        self.params = None
-        self.domain = domain
+    from six import moves
+    tf = TranslatorFactory(domain)
+    moves.builtins.__dict__['_'] = tf.primary
 
-    @property
-    def data(self):
-        # NOTE(mrodden): this should always resolve to a unicode string
-        # that best represents the state of the message currently
-
-        localedir = os.environ.get(self.domain.upper() + '_LOCALEDIR')
-        if self.locale:
-            lang = gettext.translation(self.domain,
-                                       localedir=localedir,
-                                       languages=[self.locale],
-                                       fallback=True)
-        else:
-            # use system locale for translations
-            lang = gettext.translation(self.domain,
-                                       localedir=localedir,
-                                       fallback=True)
 
-        if six.PY3:
-            ugettext = lang.gettext
-        else:
-            ugettext = lang.ugettext
+class Message(six.text_type):
+    """A Message object is a unicode object that can be translated.
 
-        full_msg = (self._left_extra_msg +
-                    ugettext(self._msg) +
-                    self._right_extra_msg)
+    Translation of Message is done explicitly using the translate() method.
+    For all non-translation intents and purposes, a Message is simply unicode,
+    and can be treated as such.
+    """
 
-        if self.params is not None:
-            full_msg = full_msg % self.params
+    def __new__(cls, msgid, msgtext=None, params=None,
+                domain='ceilometerclient', *args):
+        """Create a new Message object.
 
-        return six.text_type(full_msg)
+        In order for translation to work gettext requires a message ID, this
+        msgid will be used as the base unicode text. It is also possible
+        for the msgid and the base unicode text to be different by passing
+        the msgtext parameter.
+        """
+        # If the base msgtext is not given, we use the default translation
+        # of the msgid (which is in English) just in case the system locale is
+        # not English, so that the base text will be in that locale by default.
+        if not msgtext:
+            msgtext = Message._translate_msgid(msgid, domain)
+        # We want to initialize the parent unicode with the actual object that
+        # would have been plain unicode if 'Message' was not enabled.
+        msg = super(Message, cls).__new__(cls, msgtext)
+        msg.msgid = msgid
+        msg.domain = domain
+        msg.params = params
+        return msg
+
+    def translate(self, desired_locale=None):
+        """Translate this message to the desired locale.
+
+        :param desired_locale: The desired locale to translate the message to,
+                               if no locale is provided the message will be
+                               translated to the system's default locale.
+
+        :returns: the translated message in unicode
+        """
 
-    @property
-    def locale(self):
-        return self._locale
-
-    @locale.setter
-    def locale(self, value):
-        self._locale = value
-        if not self.params:
-            return
-
-        # This Message object may have been constructed with one or more
-        # Message objects as substitution parameters, given as a single
-        # Message, or a tuple or Map containing some, so when setting the
-        # locale for this Message we need to set it for those Messages too.
-        if isinstance(self.params, Message):
-            self.params.locale = value
-            return
-        if isinstance(self.params, tuple):
-            for param in self.params:
-                if isinstance(param, Message):
-                    param.locale = value
-            return
-        if isinstance(self.params, dict):
-            for param in self.params.values():
-                if isinstance(param, Message):
-                    param.locale = value
-
-    def _save_dictionary_parameter(self, dict_param):
-        full_msg = self.data
-        # look for %(blah) fields in string;
-        # ignore %% and deal with the
-        # case where % is first character on the line
-        keys = re.findall('(?:[^%]|^)?%\((\w*)\)[a-z]', full_msg)
-
-        # if we don't find any %(blah) blocks but have a %s
-        if not keys and re.findall('(?:[^%]|^)%[a-z]', full_msg):
-            # apparently the full dictionary is the parameter
-            params = copy.deepcopy(dict_param)
+        translated_message = Message._translate_msgid(self.msgid,
+                                                      self.domain,
+                                                      desired_locale)
+        if self.params is None:
+            # No need for more translation
+            return translated_message
+
+        # This Message object may have been formatted with one or more
+        # Message objects as substitution arguments, given either as a single
+        # argument, part of a tuple, or as one or more values in a dictionary.
+        # When translating this Message we need to translate those Messages too
+        translated_params = _translate_args(self.params, desired_locale)
+
+        translated_message = translated_message % translated_params
+
+        return translated_message
+
+    @staticmethod
+    def _translate_msgid(msgid, domain, desired_locale=None):
+        if not desired_locale:
+            system_locale = locale.getdefaultlocale()
+            # If the system locale is not available to the runtime use English
+            if not system_locale[0]:
+                desired_locale = 'en_US'
+            else:
+                desired_locale = system_locale[0]
+
+        locale_dir = os.environ.get(domain.upper() + '_LOCALEDIR')
+        lang = gettext.translation(domain,
+                                   localedir=locale_dir,
+                                   languages=[desired_locale],
+                                   fallback=True)
+        if six.PY3:
+            translator = lang.gettext
         else:
-            params = {}
-            for key in keys:
-                try:
-                    params[key] = copy.deepcopy(dict_param[key])
-                except TypeError:
-                    # cast uncopyable thing to unicode string
-                    params[key] = six.text_type(dict_param[key])
+            translator = lang.ugettext
 
-        return params
+        translated_message = translator(msgid)
+        return translated_message
 
-    def _save_parameters(self, other):
-        # we check for None later to see if
-        # we actually have parameters to inject,
-        # so encapsulate if our parameter is actually None
+    def __mod__(self, other):
+        # When we mod a Message we want the actual operation to be performed
+        # by the parent class (i.e. unicode()), the only thing  we do here is
+        # save the original msgid and the parameters in case of a translation
+        params = self._sanitize_mod_params(other)
+        unicode_mod = super(Message, self).__mod__(params)
+        modded = Message(self.msgid,
+                         msgtext=unicode_mod,
+                         params=params,
+                         domain=self.domain)
+        return modded
+
+    def _sanitize_mod_params(self, other):
+        """Sanitize the object being modded with this Message.
+
+        - Add support for modding 'None' so translation supports it
+        - Trim the modded object, which can be a large dictionary, to only
+        those keys that would actually be used in a translation
+        - Snapshot the object being modded, in case the message is
+        translated, it will be used as it was when the Message was created
+        """
         if other is None:
-            self.params = (other, )
+            params = (other,)
         elif isinstance(other, dict):
-            self.params = self._save_dictionary_parameter(other)
+            # Merge the dictionaries
+            # Copy each item in case one does not support deep copy.
+            params = {}
+            if isinstance(self.params, dict):
+                for key, val in self.params.items():
+                    params[key] = self._copy_param(val)
+            for key, val in other.items():
+                params[key] = self._copy_param(val)
         else:
-            # fallback to casting to unicode,
-            # this will handle the problematic python code-like
-            # objects that cannot be deep-copied
-            try:
-                self.params = copy.deepcopy(other)
-            except TypeError:
-                self.params = six.text_type(other)
-
-        return self
-
-    # overrides to be more string-like
-    def __unicode__(self):
-        return self.data
-
-    def __str__(self):
-        if six.PY3:
-            return self.__unicode__()
-        return self.data.encode('utf-8')
-
-    def __getstate__(self):
-        to_copy = ['_msg', '_right_extra_msg', '_left_extra_msg',
-                   'domain', 'params', '_locale']
-        new_dict = self.__dict__.fromkeys(to_copy)
-        for attr in to_copy:
-            new_dict[attr] = copy.deepcopy(self.__dict__[attr])
-
-        return new_dict
+            params = self._copy_param(other)
+        return params
 
-    def __setstate__(self, state):
-        for (k, v) in state.items():
-            setattr(self, k, v)
+    def _copy_param(self, param):
+        try:
+            return copy.deepcopy(param)
+        except Exception:
+            # Fallback to casting to unicode this will handle the
+            # python code-like objects that can't be deep-copied
+            return six.text_type(param)
 
-    # operator overloads
     def __add__(self, other):
-        copied = copy.deepcopy(self)
-        copied._right_extra_msg += other.__str__()
-        return copied
+        msg = _('Message objects do not support addition.')
+        raise TypeError(msg)
 
     def __radd__(self, other):
-        copied = copy.deepcopy(self)
-        copied._left_extra_msg += other.__str__()
-        return copied
+        return self.__add__(other)
 
-    def __mod__(self, other):
-        # do a format string to catch and raise
-        # any possible KeyErrors from missing parameters
-        self.data % other
-        copied = copy.deepcopy(self)
-        return copied._save_parameters(other)
-
-    def __mul__(self, other):
-        return self.data * other
-
-    def __rmul__(self, other):
-        return other * self.data
-
-    def __getitem__(self, key):
-        return self.data[key]
-
-    def __getslice__(self, start, end):
-        return self.data.__getslice__(start, end)
-
-    def __getattribute__(self, name):
-        # NOTE(mrodden): handle lossy operations that we can't deal with yet
-        # These override the UserString implementation, since UserString
-        # uses our __class__ attribute to try and build a new message
-        # after running the inner data string through the operation.
-        # At that point, we have lost the gettext message id and can just
-        # safely resolve to a string instead.
-        ops = ['capitalize', 'center', 'decode', 'encode',
-               'expandtabs', 'ljust', 'lstrip', 'replace', 'rjust', 'rstrip',
-               'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']
-        if name in ops:
-            return getattr(self.data, name)
-        else:
-            return _userString.UserString.__getattribute__(self, name)
+    if six.PY2:
+        def __str__(self):
+            # NOTE(luisg): Logging in python 2.6 tries to str() log records,
+            # and it expects specifically a UnicodeError in order to proceed.
+            msg = _('Message objects do not support str() because they may '
+                    'contain non-ascii characters. '
+                    'Please use unicode() or translate() instead.')
+            raise UnicodeError(msg)
 
 
 def get_available_languages(domain):
@@ -319,53 +337,143 @@ def get_available_languages(domain):
     list_identifiers = (getattr(localedata, 'list', None) or
                         getattr(localedata, 'locale_identifiers'))
     locale_identifiers = list_identifiers()
+
     for i in locale_identifiers:
         if find(i) is not None:
             language_list.append(i)
+
+    # NOTE(luisg): Babel>=1.0,<1.3 has a bug where some OpenStack supported
+    # locales (e.g. 'zh_CN', and 'zh_TW') aren't supported even though they
+    # are perfectly legitimate locales:
+    #     https://github.com/mitsuhiko/babel/issues/37
+    # In Babel 1.3 they fixed the bug and they support these locales, but
+    # they are still not explicitly "listed" by locale_identifiers().
+    # That is  why we add the locales here explicitly if necessary so that
+    # they are listed as supported.
+    aliases = {'zh': 'zh_CN',
+               'zh_Hant_HK': 'zh_HK',
+               'zh_Hant': 'zh_TW',
+               'fil': 'tl_PH'}
+    for (locale_, alias) in six.iteritems(aliases):
+        if locale_ in language_list and alias not in language_list:
+            language_list.append(alias)
+
     _AVAILABLE_LANGUAGES[domain] = language_list
     return copy.copy(language_list)
 
 
-def get_localized_message(message, user_locale):
-    """Gets a localized version of the given message in the given locale.
+def translate(obj, desired_locale=None):
+    """Gets the translated unicode representation of the given object.
 
-    If the message is not a Message object the message is returned as-is.
-    If the locale is None the message is translated to the default locale.
+    If the object is not translatable it is returned as-is.
+    If the locale is None the object is translated to the system locale.
 
-    :returns: the translated message in unicode, or the original message if
+    :param obj: the object to translate
+    :param desired_locale: the locale to translate the message to, if None the
+                           default system locale will be used
+    :returns: the translated object in unicode, or the original object if
               it could not be translated
     """
-    translated = message
+    message = obj
+    if not isinstance(message, Message):
+        # If the object to translate is not already translatable,
+        # let's first get its unicode representation
+        message = six.text_type(obj)
     if isinstance(message, Message):
-        original_locale = message.locale
-        message.locale = user_locale
-        translated = six.text_type(message)
-        message.locale = original_locale
-    return translated
+        # Even after unicoding() we still need to check if we are
+        # running with translatable unicode before translating
+        return message.translate(desired_locale)
+    return obj
+
 
+def _translate_args(args, desired_locale=None):
+    """Translates all the translatable elements of the given arguments object.
 
-class LocaleHandler(logging.Handler):
-    """Handler that can have a locale associated to translate Messages.
+    This method is used for translating the translatable values in method
+    arguments which include values of tuples or dictionaries.
+    If the object is not a tuple or a dictionary the object itself is
+    translated if it is translatable.
 
-    A quick example of how to utilize the Message class above.
-    LocaleHandler takes a locale and a target logging.Handler object
-    to forward LogRecord objects to after translating the internal Message.
+    If the locale is None the object is translated to the system locale.
+
+    :param args: the args to translate
+    :param desired_locale: the locale to translate the args to, if None the
+                           default system locale will be used
+    :returns: a new args object with the translated contents of the original
     """
+    if isinstance(args, tuple):
+        return tuple(translate(v, desired_locale) for v in args)
+    if isinstance(args, dict):
+        translated_dict = {}
+        for (k, v) in six.iteritems(args):
+            translated_v = translate(v, desired_locale)
+            translated_dict[k] = translated_v
+        return translated_dict
+    return translate(args, desired_locale)
+
 
-    def __init__(self, locale, target):
-        """Initialize a LocaleHandler
+class TranslationHandler(handlers.MemoryHandler):
+    """Handler that translates records before logging them.
+
+    The TranslationHandler takes a locale and a target logging.Handler object
+    to forward LogRecord objects to after translating them. This handler
+    depends on Message objects being logged, instead of regular strings.
+
+    The handler can be configured declaratively in the logging.conf as follows:
+
+        [handlers]
+        keys = translatedlog, translator
+
+        [handler_translatedlog]
+        class = handlers.WatchedFileHandler
+        args = ('/var/log/api-localized.log',)
+        formatter = context
+
+        [handler_translator]
+        class = openstack.common.log.TranslationHandler
+        target = translatedlog
+        args = ('zh_CN',)
+
+    If the specified locale is not available in the system, the handler will
+    log in the default locale.
+    """
+
+    def __init__(self, locale=None, target=None):
+        """Initialize a TranslationHandler
 
         :param locale: locale to use for translating messages
         :param target: logging.Handler object to forward
                        LogRecord objects to after translation
         """
-        logging.Handler.__init__(self)
+        # NOTE(luisg): In order to allow this handler to be a wrapper for
+        # other handlers, such as a FileHandler, and still be able to
+        # configure it using logging.conf, this handler has to extend
+        # MemoryHandler because only the MemoryHandlers' logging.conf
+        # parsing is implemented such that it accepts a target handler.
+        handlers.MemoryHandler.__init__(self, capacity=0, target=target)
         self.locale = locale
-        self.target = target
+
+    def setFormatter(self, fmt):
+        self.target.setFormatter(fmt)
 
     def emit(self, record):
-        if isinstance(record.msg, Message):
-            # set the locale and resolve to a string
-            record.msg.locale = self.locale
+        # We save the message from the original record to restore it
+        # after translation, so other handlers are not affected by this
+        original_msg = record.msg
+        original_args = record.args
+
+        try:
+            self._translate_and_log_record(record)
+        finally:
+            record.msg = original_msg
+            record.args = original_args
+
+    def _translate_and_log_record(self, record):
+        record.msg = translate(record.msg, self.locale)
+
+        # In addition to translating the message, we also need to translate
+        # arguments that were passed to the log method that were not part
+        # of the main message e.g., log.info(_('Some message %s'), this_one))
+        record.args = _translate_args(record.args, self.locale)
 
         self.target.emit(record)
diff --git a/ceilometerclient/openstack/common/importutils.py b/ceilometerclient/openstack/common/importutils.py
index 4fd9ae2..a7972e0 100644
--- a/ceilometerclient/openstack/common/importutils.py
+++ b/ceilometerclient/openstack/common/importutils.py
@@ -24,10 +24,10 @@ import traceback
 def import_class(import_str):
     """Returns a class from a string including module and class."""
     mod_str, _sep, class_str = import_str.rpartition('.')
+    __import__(mod_str)
     try:
-        __import__(mod_str)
         return getattr(sys.modules[mod_str], class_str)
-    except (ValueError, AttributeError):
+    except AttributeError:
         raise ImportError('Class %s cannot be found (%s)' %
                           (class_str,
                            traceback.format_exception(*sys.exc_info())))
@@ -58,6 +58,13 @@ def import_module(import_str):
     return sys.modules[import_str]
 
 
+def import_versioned_module(version, submodule=None):
+    module = 'ceilometerclient.v%s' % version
+    if submodule:
+        module = '.'.join((module, submodule))
+    return import_module(module)
+
+
 def try_import(import_str, default=None):
     """Try to import a module and if it fails return default."""
     try:
diff --git a/ceilometerclient/openstack/common/uuidutils.py b/ceilometerclient/openstack/common/uuidutils.py
new file mode 100644
index 0000000..234b880
--- /dev/null
+++ b/ceilometerclient/openstack/common/uuidutils.py
@@ -0,0 +1,37 @@
+# Copyright (c) 2012 Intel Corporation.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+"""
+UUID related utilities and helper functions.
+"""
+
+import uuid
+
+
+def generate_uuid():
+    return str(uuid.uuid4())
+
+
+def is_uuid_like(val):
+    """Returns validation of a value as a UUID.
+
+    For our purposes, a UUID is a canonical form string:
+    aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
+
+    """
+    try:
+        return str(uuid.UUID(val)) == val
+    except (TypeError, ValueError, AttributeError):
+        return False
diff --git a/tools/install_venv_common.py b/tools/install_venv_common.py
index 46822e3..e279159 100644
--- a/tools/install_venv_common.py
+++ b/tools/install_venv_common.py
@@ -125,7 +125,7 @@ class InstallVenv(object):
         parser.add_option('-n', '--no-site-packages',
                           action='store_true',
                           help="Do not inherit packages from global Python "
-                               "install")
+                               "install.")
         return parser.parse_args(argv[1:])[0]
 
 
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