diff options
-rw-r--r-- | openstack/common/service.py | 73 | ||||
-rw-r--r-- | tests/unit/test_service.py | 40 |
2 files changed, 113 insertions, 0 deletions
diff --git a/openstack/common/service.py b/openstack/common/service.py index a0a8e5a..9c712c6 100644 --- a/openstack/common/service.py +++ b/openstack/common/service.py @@ -19,6 +19,64 @@ """Generic Node base class for all workers that run on hosts.""" +import sys +import eventlet +import greenlet + + +class Launcher(object): + """Launch one or more services and wait for them to complete.""" + + def __init__(self): + """Initialize the service launcher. + + :returns: None + + """ + self._services = [] + + @staticmethod + def run_service(service): + """Start and wait for a service to finish. + + :param service: service to run and wait for. + :returns: None + + """ + service.start() + service.wait() + + def launch_service(self, service): + """Load and start the given service. + + :param service: The service you would like to start. + :returns: None + + """ + gt = eventlet.spawn(self.run_service, service) + self._services.append(gt) + + def stop(self): + """Stop all services which are currently running. + + :returns: None + + """ + for service in self._services: + service.kill() + + def wait(self): + """Waits until all services have been stopped, and then returns. + + :returns: None + + """ + for service in self._services: + try: + service.wait() + except greenlet.GreenletExit: + pass + class Service(object): """Service object for binaries running on hosts. @@ -28,3 +86,18 @@ class Service(object): def __init__(self, host, manager, *args, **kwargs): self.host = host self.manager = manager + + def start(self): + if self.manager: + self.manager.init_host() + + def stop(self): + pass + + def wait(self): + pass + + +def launcher(service): + l = Launcher() + l.launch_service(service) diff --git a/tests/unit/test_service.py b/tests/unit/test_service.py new file mode 100644 index 0000000..fa79fa8 --- /dev/null +++ b/tests/unit/test_service.py @@ -0,0 +1,40 @@ +# vim: tabstop=4 shiftwidth=4 softtabstop=4 + +# Copyright 2010 United States Government as represented by the +# Administrator of the National Aeronautics and Space Administration. +# 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. + +""" +Unit Tests for remote procedure calls using queue +""" +from eventlet import greenthread + +from openstack.common import cfg +from openstack.common import service +from openstack.common import manager +from tests import utils + + +class ExtendedService(service.Service): + def test_method(self): + return 'service' + + +class ServiceManagerTestCase(utils.BaseTestCase): + """Test cases for Services""" + def test_override_manager_method(self): + serv = ExtendedService('test', None) + serv.start() + self.assertEqual(serv.test_method(), 'service') |