| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| package org.apache.felix.dm; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.List; |
| |
| import org.apache.felix.dm.dependencies.BundleDependency; |
| import org.apache.felix.dm.dependencies.ConfigurationDependency; |
| import org.apache.felix.dm.dependencies.ResourceDependency; |
| import org.apache.felix.dm.dependencies.ServiceDependency; |
| import org.apache.felix.dm.dependencies.TemporalServiceDependency; |
| import org.apache.felix.dm.impl.AdapterImpl; |
| import org.apache.felix.dm.impl.AspectImpl; |
| import org.apache.felix.dm.impl.BundleAdapterImpl; |
| import org.apache.felix.dm.impl.Logger; |
| import org.apache.felix.dm.impl.ResourceAdapterImpl; |
| import org.apache.felix.dm.impl.ServiceImpl; |
| import org.apache.felix.dm.impl.dependencies.BundleDependencyImpl; |
| import org.apache.felix.dm.impl.dependencies.ConfigurationDependencyImpl; |
| import org.apache.felix.dm.impl.dependencies.ResourceDependencyImpl; |
| import org.apache.felix.dm.impl.dependencies.ServiceDependencyImpl; |
| import org.apache.felix.dm.impl.dependencies.TemporalServiceDependencyImpl; |
| import org.apache.felix.dm.resources.Resource; |
| import org.apache.felix.dm.service.Service; |
| import org.osgi.framework.BundleContext; |
| |
| /** |
| * The dependency manager manages all services and their dependencies. Using |
| * this API you can declare all services and their dependencies. Under normal |
| * circumstances, you get passed an instance of this class through the |
| * <code>DependencyActivatorBase</code> subclass you use as your |
| * <code>BundleActivator</code>, but it is also possible to create your |
| * own instance. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public class DependencyManager { |
| private final BundleContext m_context; |
| private final Logger m_logger; |
| private List m_services = Collections.synchronizedList(new ArrayList()); |
| |
| /** |
| * Creates a new dependency manager. You need to supply the |
| * <code>BundleContext</code> to be used by the dependency |
| * manager to register services and communicate with the |
| * framework. |
| * |
| * @param context the bundle context |
| */ |
| public DependencyManager(BundleContext context) { |
| this(context, new Logger(context)); |
| } |
| |
| DependencyManager(BundleContext context, Logger logger) { |
| m_context = context; |
| m_logger = logger; |
| } |
| |
| /** |
| * Adds a new service to the dependency manager. After the service was added |
| * it will be started immediately. |
| * |
| * @param service the service to add |
| */ |
| public void add(Service service) { |
| m_services.add(service); |
| service.start(); |
| } |
| |
| /** |
| * Removes a service from the dependency manager. Before the service is removed |
| * it is stopped first. |
| * |
| * @param service the service to remove |
| */ |
| public void remove(Service service) { |
| service.stop(); |
| m_services.remove(service); |
| } |
| |
| /** |
| * Creates a new service. |
| * |
| * @return the new service |
| */ |
| public Service createService() { |
| return new ServiceImpl(m_context, this, m_logger); |
| } |
| |
| /** |
| * Creates a new service dependency. |
| * |
| * @return the service dependency |
| */ |
| public ServiceDependency createServiceDependency() { |
| return new ServiceDependencyImpl(m_context, m_logger); |
| } |
| |
| /** |
| * Creates a new temporal service dependency. |
| * |
| * @param timeout the max number of milliseconds to wait for a service availability. |
| * @return the service dependency |
| */ |
| public TemporalServiceDependency createTemporalServiceDependency() { |
| return new TemporalServiceDependencyImpl(m_context, m_logger); |
| } |
| |
| /** |
| * Creates a new configuration dependency. |
| * |
| * @return the configuration dependency |
| */ |
| public ConfigurationDependency createConfigurationDependency() { |
| return new ConfigurationDependencyImpl(m_context, m_logger); |
| } |
| |
| /** |
| * Creates a new bundle dependency. |
| * |
| * @return |
| */ |
| public BundleDependency createBundleDependency() { |
| return new BundleDependencyImpl(m_context, m_logger); |
| } |
| |
| /** |
| * Creates a new resource dependency. |
| * |
| * @return the resource dependency |
| */ |
| public ResourceDependency createResourceDependency() { |
| return new ResourceDependencyImpl(m_context, m_logger); |
| } |
| |
| /** |
| * Creates a new aspect. The aspect will be applied to any service that |
| * matches the specified interface and filter. For each matching service |
| * an aspect will be created based on the aspect implementation class. |
| * The aspect will be registered with the same interface and properties |
| * as the original service, plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @param serviceInterface the service interface to apply the aspect to |
| * @param serviceFilter the filter condition to use with the service interface |
| * @param aspectImplementation the implementation of the aspect |
| * @param aspectProperties additional properties to use with the aspect service registration |
| * @return a service that acts as a factory for generating aspects |
| */ |
| public Service createAspectService(Class serviceInterface, String serviceFilter, Object aspectImplementation, Dictionary aspectProperties) { |
| return createService() |
| .setImplementation(new AspectImpl(serviceInterface, serviceFilter, aspectImplementation, aspectProperties)) |
| .add(createServiceDependency() |
| .setService(serviceInterface, serviceFilter) |
| .setAutoConfig(false) |
| .setCallbacks("added", "removed") |
| ); |
| } |
| |
| /** |
| * Creates a new adapter. The adapter will be applied to any service that |
| * matches the specified interface and filter. For each matching service |
| * an adapter will be created based on the adapter implementation class. |
| * The adapter will be registered with the specified interface and existing properties |
| * from the original service plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @param serviceInterface the service interface to apply the adapter to |
| * @param serviceFilter the filter condition to use with the service interface |
| * @param adapterInterface the interface to use when registering adapters |
| * @param adapterImplementation the implementation of the adapter |
| * @param adapterProperties additional properties to use with the adapter service registration |
| * @return a service that acts as a factory for generating adapters |
| */ |
| public Service createAdapterService(Class serviceInterface, String serviceFilter, Class adapterInterface, Object adapterImplementation, Dictionary adapterProperties) { |
| return createService() |
| .setImplementation(new AdapterImpl(serviceInterface, serviceFilter, adapterImplementation, adapterInterface.getName(), adapterProperties)) |
| .add(createServiceDependency() |
| .setService(serviceInterface) |
| .setAutoConfig(false) |
| .setCallbacks("added", "removed") |
| ); |
| } |
| |
| /** |
| * Creates a new resource adapter. The adapter will be applied to any resource that |
| * matches the specified filter condition. For each matching resource |
| * an adapter will be created based on the adapter implementation class. |
| * The adapter will be registered with the specified interface and existing properties |
| * from the original resource plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @param resourceFilter the filter condition to use with the resource |
| * @param adapterInterface the interface to use when registering adapters |
| * @param adapterProperties additional properties to use with the adapter service registration |
| * @param adapterImplementation the implementation of the adapter |
| * @param propagate <code>true</code> if properties from the resource should be propagated to the service |
| * @return a service that acts as a factory for generating resource adapters |
| * @see Resource |
| */ |
| public Service createResourceAdapterService(String resourceFilter, Class adapterInterface, Dictionary adapterProperties, Object adapterImplementation, boolean propagate) { |
| return createService() |
| .setImplementation(new ResourceAdapterImpl(resourceFilter, adapterImplementation, adapterInterface.getName(), adapterProperties, propagate)) |
| .add(createResourceDependency() |
| .setFilter(resourceFilter) |
| .setAutoConfig(false) |
| .setCallbacks("added", "removed") |
| ); |
| } |
| |
| /** |
| * Creates a new bundle adapter. The adapter will be applied to any bundle that |
| * matches the specified bundle state mask and filter condition. For each matching |
| * bundle an adapter will be created based on the adapter implementation class. |
| * The adapter will be registered with the specified interface |
| * |
| * TODO and existing properties from the original resource plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @param bundleStateMask the bundle state mask to apply |
| * @param bundleFilter the filter to apply to the bundle manifest |
| * @param adapterImplementation the implementation of the adapter |
| * @param adapterInterface the interface to use when registering adapters |
| * @param adapterProperties additional properties to use with the service registration |
| * @param propagate <code>true</code> if properties from the bundle should be propagated to the service |
| * @return a service that acts as a factory for generating bundle adapters |
| */ |
| public Service createBundleAdapterService(int bundleStateMask, String bundleFilter, Object adapterImplementation, String adapterInterface, Dictionary adapterProperties, boolean propagate) { |
| return createService() |
| .setImplementation(new BundleAdapterImpl(bundleStateMask, bundleFilter, adapterImplementation, adapterInterface, adapterProperties, propagate)) |
| .add(createBundleDependency() |
| .setFilter(bundleFilter) |
| .setStateMask(bundleStateMask) |
| .setCallbacks("added", "removed") |
| ); |
| } |
| |
| /** |
| * Returns a list of services. |
| * |
| * @return a list of services |
| */ |
| public List getServices() { |
| return Collections.unmodifiableList(m_services); |
| } |
| } |