| // Copyright 2006, 2008 The Apache Software Foundation |
| // |
| // 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.tapestry5.ioc; |
| |
| /** |
| * Allows certain types of lifecycles to control exactly how services are instantiated. |
| */ |
| public interface ServiceLifecycle |
| { |
| /** |
| * Returns the same creator, or a new one, that encapsulates the creation of the core service implementation. |
| * |
| * @param resources source of information about the service to be created, and source of additional services or |
| * other resources that may be needed when constructing the core service implementation |
| * @param creator object capable of creating the service implementation on demand. This is a wrapper around the |
| * service's builder method. |
| * @return the service or equivalent service proxy |
| */ |
| Object createService(ServiceResources resources, ObjectCreator creator); |
| |
| /** |
| * Returns true if the lifecycle is a singleton (a service that will only be created once). Return false if the |
| * underlying service instance may be created multiple times (for example, the {@link |
| * org.apache.tapestry5.ioc.ScopeConstants#PERTHREAD} scope}. A future version of Tapestry IoC may optimize for the |
| * later case. |
| * |
| * @return true for singletons, false for services that can be repeatedly constructed |
| */ |
| boolean isSingleton(); |
| } |