| /* |
| * 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.apache.felix.utils.extender; |
| |
| /** |
| * A simple interface used by the extender to manage extensions. |
| */ |
| public interface Extension { |
| |
| /** |
| * Start this extension. Starting and stopping of the extension |
| * should be synchronized. |
| * @throws Exception If starting fails. |
| */ |
| void start() throws Exception; |
| |
| /** |
| * Destroy should be synchronous and only return when the extension |
| * has been fully destroyed. In addition it must be synchronized with |
| * start, because start() and destroy() can be called concurrently. |
| * @throws Exception If destroying fails. |
| */ |
| void destroy() throws Exception; |
| |
| } |