br.com.caelum.vraptor.ioc.spring.DefaultSpringLocator.java Source code

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Here is the source code for br.com.caelum.vraptor.ioc.spring.DefaultSpringLocator.java

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/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
 * 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 br.com.caelum.vraptor.ioc.spring;

import javax.servlet.ServletContext;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.ConfigurableWebApplicationContext;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.context.support.XmlWebApplicationContext;

import br.com.caelum.vraptor.ioc.ApplicationScoped;

/**
 * Default implementation for SpringLocator.
 * It tries to use spring default location to create the ApplicationContext
 * @author Lucas Cavalcanti
 *
 */
@ApplicationScoped
public class DefaultSpringLocator implements SpringLocator {

    private static final Logger logger = LoggerFactory.getLogger(DefaultSpringLocator.class);

    public ConfigurableWebApplicationContext getApplicationContext(ServletContext servletContext) {
        ConfigurableWebApplicationContext context = (ConfigurableWebApplicationContext) WebApplicationContextUtils
                .getWebApplicationContext(servletContext);
        if (context != null) {
            logger.info("Using a web application context: {}", context);
            return context;
        }
        if (DefaultSpringLocator.class.getResource("/applicationContext.xml") != null) {
            logger.info("Using an XmlWebApplicationContext, searching for applicationContext.xml");
            XmlWebApplicationContext ctx = new XmlWebApplicationContext();
            ctx.setConfigLocation("classpath:applicationContext.xml");
            servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, ctx);
            return ctx;
        }
        logger.info("No application context found");
        ConfigurableWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
        ctx.setId("VRaptor");
        servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, ctx);
        return ctx;
    }

}