Spring Framework example source code file (AbstractBeanFactoryPointcutAdvisor.java)

This example Spring Framework source code file (AbstractBeanFactoryPointcutAdvisor.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

abstractbeanfactorypointcutadvisor, abstractpointcutadvisor, advice, advice, beanfactory, beanfactory, beanfactoryaware, object, object, string, string

The Spring Framework AbstractBeanFactoryPointcutAdvisor.java source code

/*
 * Copyright 2002-2007 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.aop.support;

import org.aopalliance.aop.Advice;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.util.Assert;

/**
 * Abstract BeanFactory-based PointcutAdvisor that allows for any Advice
 * to be configured as reference to an Advice bean in a BeanFactory.
 *
 * <p>Specifying the name of an advice bean instead of the advice object itself
 * (if running within a BeanFactory) increases loose coupling at initialization time,
 * in order to not initialize the advice object until the pointcut actually matches.
 *
 * @author Juergen Hoeller
 * @since 2.0.2
 * @see #setAdviceBeanName
 * @see DefaultBeanFactoryPointcutAdvisor
 */
public abstract class AbstractBeanFactoryPointcutAdvisor extends AbstractPointcutAdvisor implements BeanFactoryAware {

	private String adviceBeanName;

	private BeanFactory beanFactory;

	private Advice advice;

	private final Object adviceMonitor = new Object();


	/**
	 * Specify the name of the advice bean that this advisor should refer to.
	 * <p>An instance of the specified bean will be obtained on first access
	 * of this advisor's advice. This advisor will only ever obtain at most one
	 * single instance of the advice bean, caching the instance for the lifetime
	 * of the advisor.
	 * @see #getAdvice()
	 */
	public void setAdviceBeanName(String adviceBeanName) {
		this.adviceBeanName = adviceBeanName;
	}

	/**
	 * Return the name of the advice bean that this advisor refers to, if any.
	 */
	public String getAdviceBeanName() {
		return this.adviceBeanName;
	}

	public void setBeanFactory(BeanFactory beanFactory) {
		this.beanFactory = beanFactory;
	}


	public Advice getAdvice() {
		synchronized (this.adviceMonitor) {
			if (this.advice == null && this.adviceBeanName != null) {
				Assert.state(this.beanFactory != null, "BeanFactory must be set to resolve 'adviceBeanName'");
				this.advice = (Advice) this.beanFactory.getBean(this.adviceBeanName, Advice.class);
			}
			return this.advice;
		}
	}

	public String toString() {
		return getClass().getName() + ": advice bean '" + getAdviceBeanName() + "'";
	}

}