| /* |
| * 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.wicket.proxy; |
| |
| import org.apache.wicket.IClusterable; |
| |
| /** |
| * Represents a service locator for lazy init proxies. When the first method |
| * invocation occurs on the lazy init proxy this locator will be used to |
| * retrieve the proxy target object that will receive the method invocation. |
| * <p> |
| * Generally implementations should be small when serialized because the main |
| * purpose of lazy init proxies is to be stored in session when the wicket pages |
| * are serialized, and when deserialized to be able to lookup the dependency |
| * again. The smaller the implementation of IProxyTargetLocator the less the |
| * drain on session size. |
| * <p> |
| * A small implementation may use a static lookup to retrieve the target object. |
| * <p> |
| * Example: |
| * |
| * <pre> |
| * class UserServiceLocator implements IProxyTargetLocator |
| * { |
| * Object locateProxyObject() |
| * { |
| * MyApplication app = (MyApplication) Application.get(); |
| * return app.getUserService(); |
| * } |
| * } |
| * </pre> |
| * |
| * @see LazyInitProxyFactory#createProxy(Class, IProxyTargetLocator) |
| * |
| * @author Igor Vaynberg (ivaynberg) |
| * |
| */ |
| public interface IProxyTargetLocator extends IClusterable |
| { |
| /** |
| * Returns the object that will be used as target object for a lazy init |
| * proxy. |
| * |
| * @return retrieved object |
| */ |
| Object locateProxyTarget(); |
| } |