Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2014-present Open Networking Laboratory |
Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 3 | * |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 7 | * |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 15 | */ |
tom | 0eb04ca | 2014-08-25 14:34:51 -0700 | [diff] [blame] | 16 | package org.onlab.osgi; |
| 17 | |
| 18 | import org.osgi.framework.BundleContext; |
| 19 | import org.osgi.framework.FrameworkUtil; |
tom | caf3bf7 | 2014-09-23 13:20:53 -0700 | [diff] [blame] | 20 | import org.osgi.framework.ServiceReference; |
tom | 0eb04ca | 2014-08-25 14:34:51 -0700 | [diff] [blame] | 21 | |
| 22 | /** |
| 23 | * Default implementation of the service directory using OSGi framework utilities. |
| 24 | */ |
| 25 | public class DefaultServiceDirectory implements ServiceDirectory { |
tom | 0872a17 | 2014-09-23 11:24:26 -0700 | [diff] [blame] | 26 | |
| 27 | /** |
| 28 | * Returns the reference to the implementation of the specified service. |
| 29 | * |
| 30 | * @param serviceClass service class |
| 31 | * @param <T> type of service |
| 32 | * @return service implementation |
| 33 | */ |
| 34 | public static <T> T getService(Class<T> serviceClass) { |
tom | 0eb04ca | 2014-08-25 14:34:51 -0700 | [diff] [blame] | 35 | BundleContext bc = FrameworkUtil.getBundle(serviceClass).getBundleContext(); |
tom | caf3bf7 | 2014-09-23 13:20:53 -0700 | [diff] [blame] | 36 | if (bc != null) { |
| 37 | ServiceReference<T> reference = bc.getServiceReference(serviceClass); |
| 38 | if (reference != null) { |
| 39 | T impl = bc.getService(reference); |
| 40 | if (impl != null) { |
| 41 | return impl; |
| 42 | } |
| 43 | } |
tom | 0eb04ca | 2014-08-25 14:34:51 -0700 | [diff] [blame] | 44 | } |
tom | caf3bf7 | 2014-09-23 13:20:53 -0700 | [diff] [blame] | 45 | throw new ServiceNotFoundException("Service " + serviceClass.getName() + " not found"); |
tom | 0eb04ca | 2014-08-25 14:34:51 -0700 | [diff] [blame] | 46 | } |
tom | 0872a17 | 2014-09-23 11:24:26 -0700 | [diff] [blame] | 47 | |
| 48 | @Override |
| 49 | public <T> T get(Class<T> serviceClass) { |
| 50 | return getService(serviceClass); |
| 51 | } |
| 52 | |
tom | 0eb04ca | 2014-08-25 14:34:51 -0700 | [diff] [blame] | 53 | } |