BaseAction.java

/*
Copyright 2009 Ramnivas Laddad

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.springframework.samples.jpetstore.web.struts;

import javax.servlet.ServletContext;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionServlet;

import org.springframework.samples.jpetstore.domain.logic.PetStoreFacade;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

/**
 * Superclass for Struts actions in JPetStore's web tier.
 *
 * <p>Looks up the Spring WebApplicationContext via the ServletContext
 * and obtains the PetStoreFacade implementation from it, making it
 * available to subclasses via a protected getter method.
 *
 * <p>As alternative to such a base class, consider using Spring's
 * ActionSupport class for Struts, which pre-implements
 * WebApplicationContext lookup in a generic fashion.
 *
 * @author Juergen Hoeller
 * @since 30.11.2003
 * @see #getPetStore
 * @see org.springframework.web.context.support.WebApplicationContextUtils#getRequiredWebApplicationContext
 * @see org.springframework.web.struts.ActionSupport
 */
public abstract class BaseAction extends Action {

  private PetStoreFacade petStore;

	public void setServlet(ActionServlet actionServlet) {
		super.setServlet(actionServlet);
		if (actionServlet != null) {
			ServletContext servletContext = actionServlet.getServletContext();
			WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);
			this.petStore = (PetStoreFacade) wac.getBean("petStore");
		}
	}

	protected PetStoreFacade getPetStore() {
		return petStore;
	}

}