Marcel Offermans | a962bc9 | 2009-11-21 17:59:33 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.apache.felix.dependencymanager; |
| 20 | |
| 21 | import java.util.ArrayList; |
| 22 | import java.util.Collections; |
| 23 | import java.util.List; |
| 24 | |
| 25 | import org.osgi.framework.BundleContext; |
| 26 | |
| 27 | /** |
| 28 | * The dependency manager. Manages all services and their dependencies. |
| 29 | * |
| 30 | * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| 31 | */ |
| 32 | public class DependencyManager { |
| 33 | private final BundleContext m_context; |
| 34 | private final Logger m_logger; |
| 35 | private List m_services = Collections.synchronizedList(new ArrayList()); |
| 36 | |
| 37 | /** |
| 38 | * Creates a new dependency manager. |
| 39 | * |
| 40 | * @param context the bundle context |
| 41 | * @param logger |
| 42 | */ |
| 43 | public DependencyManager(BundleContext context, Logger logger) { |
| 44 | m_context = context; |
| 45 | m_logger = logger; |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Adds a new service to the dependency manager. After the service was added |
| 50 | * it will be started immediately. |
| 51 | * |
| 52 | * @param service the service to add |
| 53 | */ |
| 54 | public void add(Service service) { |
| 55 | m_services.add(service); |
| 56 | service.start(); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Removes a service from the dependency manager. Before the service is removed |
| 61 | * it is stopped first. |
| 62 | * |
| 63 | * @param service the service to remove |
| 64 | */ |
| 65 | public void remove(Service service) { |
| 66 | service.stop(); |
| 67 | m_services.remove(service); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Creates a new service. |
| 72 | * |
| 73 | * @return the new service |
| 74 | */ |
| 75 | public Service createService() { |
| 76 | return new ServiceImpl(m_context, this, m_logger); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Creates a new service dependency. |
| 81 | * |
| 82 | * @return the service dependency |
| 83 | */ |
| 84 | public ServiceDependency createServiceDependency() { |
| 85 | return new ServiceDependency(m_context, m_logger); |
| 86 | } |
| 87 | |
| 88 | public ConfigurationDependency createConfigurationDependency() { |
| 89 | return new ConfigurationDependency(m_context, m_logger); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Returns a list of services. |
| 94 | * |
| 95 | * @return a list of services |
| 96 | */ |
| 97 | public List getServices() { |
| 98 | return Collections.unmodifiableList(m_services); |
| 99 | } |
| 100 | |
| 101 | } |