| /* |
| * Copyright (c) OSGi Alliance (2011). 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. |
| */ |
| |
| package org.osgi.service.component.annotations; |
| |
| /** |
| * Policy for the {@link Reference} annotation. |
| * |
| * @version $Id$ |
| */ |
| public enum ReferencePolicy { |
| /** |
| * The static policy is the most simple policy and is the default policy. A |
| * component instance never sees any of the dynamics. Component |
| * configurations are deactivated before any bound service for a reference |
| * having a static policy becomes unavailable. If a target service is |
| * available to replace the bound service which became unavailable, the |
| * component configuration must be reactivated and bound to the replacement |
| * service. |
| */ |
| STATIC, |
| /** |
| * The dynamic policy is slightly more complex since the component |
| * implementation must properly handle changes in the set of bound services. |
| * With the dynamic policy, SCR can change the set of bound services without |
| * deactivating a component configuration. If the component uses the event |
| * strategy to access services, then the component instance will be notified |
| * of changes in the set of bound services by calls to the bind and unbind |
| * methods. |
| */ |
| DYNAMIC; |
| } |