Spring Framework example source code file (ContextBeanFactoryReference.java)

This example Spring Framework source code file (ContextBeanFactoryReference.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

applicationcontext, applicationcontext, beanfactory, beanfactoryreference, beanfactoryreference, configurableapplicationcontext, configurableapplicationcontext, contextbeanfactoryreference, contextbeanfactoryreference, illegalstateexception

The Spring Framework ContextBeanFactoryReference.java source code

/*
 * Copyright 2002-2005 the original author or authors.
 * 
 * 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.context.access;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.access.BeanFactoryReference;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;

/**
 * ApplicationContext-specific implementation of BeanFactoryReference,
 * wrapping a newly created ApplicationContext, closing it on release.
 *
 * <p>As per BeanFactoryReference contract, release may be called
 * more than once, with subsequent calls not doing anything. However, calling
 * <code>getFactory after a release call will cause an exception.
 *
 * @author Juergen Hoeller
 * @author Colin Sampaleanu
 * @since 13.02.2004
 * @see org.springframework.context.ConfigurableApplicationContext#close
 */
public class ContextBeanFactoryReference implements BeanFactoryReference {

	private ApplicationContext applicationContext;


	/**
	 * Create a new ContextBeanFactoryReference for the given context.
	 * @param applicationContext the ApplicationContext to wrap
	 */
	public ContextBeanFactoryReference(ApplicationContext applicationContext) {
		this.applicationContext = applicationContext;
	}


	public BeanFactory getFactory() {
		if (this.applicationContext == null) {
			throw new IllegalStateException(
					"ApplicationContext owned by this BeanFactoryReference has been released");
		}
		return this.applicationContext;
	}

	public void release() {
		if (this.applicationContext != null) {
			ApplicationContext savedCtx;
			
			// We don't actually guarantee thread-safety, but it's not a lot of extra work.
			synchronized (this) {
				savedCtx = this.applicationContext;
				this.applicationContext = null;
			}

			if (savedCtx != null && savedCtx instanceof ConfigurableApplicationContext) {
				((ConfigurableApplicationContext) savedCtx).close();
			}
		}
	}

}