| /* |
| * Copyright (c) 2008, Rickard Öberg. 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.qi4j.api.service; |
| |
| import org.qi4j.api.activation.ActivationEventListenerRegistration; |
| import org.qi4j.api.structure.MetaInfoHolder; |
| import org.qi4j.api.type.HasTypes; |
| |
| /** |
| * From a ServiceReference you can access and modify metadata about a service. |
| * You can also access the actual service through get(), that can then be invoked. |
| */ |
| public interface ServiceReference<T> |
| extends HasTypes, ActivationEventListenerRegistration, MetaInfoHolder |
| { |
| /** |
| * @return the service's identity |
| */ |
| String identity(); |
| |
| /** |
| * @return the actual service |
| */ |
| T get(); |
| |
| /** |
| * @return TRUE if the service is active, otherwise return FALSE |
| */ |
| boolean isActive(); |
| |
| /** |
| * @return TRUE if the service is available, otherwise return FALSE |
| */ |
| boolean isAvailable(); |
| } |