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Wicket is a Java web application framework that takes simplicity, separation of concerns and ease of development to a whole new level. Wicket pages can be mocked up, previewed and later revised using standard WYSIWYG HTML design tools. Dynamic content processing and form handling is all handled in Java code using a first-class component model backed by POJO data beans that can easily be persisted using your favorite technology.

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/*
 * 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;

import java.util.ServiceLoader;

import org.apache.wicket.request.resource.PackageResource;

/**
 * Initializes something when application loads.
 * 
 * Initializer can be used for clustering. Lets say you access a page that has a link to a resource on
 * node A now the url for the resource gets forwarded to node B, but node B doesn't have the
 * resource registered yet because maybe the page class hasn't been loaded and so its static block
 * hasn't run yet. So the initializer is a place for you to register all those resources and do all
 * the stuff you used to do in the static blocks.
 * 

 * You don't have to pre-register {@link PackageResource package resources}, as they can be
 * initialized lazily.
 * 

 * Initializers can be configured via {@link ServiceLoader}, i.e. by having a file
 * /META-INF/services/org.apache.wicket.IInitializer in the class path root, with each line containing the
 * full class name of an {@link IInitializer}.
 * 
 * 
 * @author Jonathan Locke
 */
public interface IInitializer
{
	/**
	 * @param application
	 *            The application loading the component
	 */
	void init(Application application);


	/**
	 * @param application
	 *            The application loading the component
	 */
	void destroy(Application application);

}