com.alibaba.nacos.spring.context.properties.config.NacosConfigurationPropertiesBindingPostProcessor Maven / Gradle / Ivy

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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 com.alibaba.nacos.spring.context.properties.config;

import static org.springframework.core.annotation.AnnotationUtils.findAnnotation;

import java.util.Properties;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.Environment;

import com.alibaba.nacos.api.config.annotation.NacosConfigurationProperties;
import com.alibaba.nacos.spring.factory.NacosServiceFactory;

/**
 * {@link NacosConfigurationProperties} Binding {@link BeanPostProcessor}
 *
 * @author Mercy
 * @see NacosConfigurationProperties
 * @see BeanPostProcessor
 * @since 0.1.0
 */
public class NacosConfigurationPropertiesBindingPostProcessor
		implements BeanPostProcessor, ApplicationContextAware {

	/**
	 * The name of {@link NacosConfigurationPropertiesBindingPostProcessor} Bean
	 */
	public static final String BEAN_NAME = "nacosConfigurationPropertiesBindingPostProcessor";

	private Properties globalNacosProperties;

	private NacosServiceFactory nacosServiceFactory;

	private Environment environment;

	private ApplicationEventPublisher applicationEventPublisher;

	private ConfigurableApplicationContext applicationContext;

	@Override
	public Object postProcessBeforeInitialization(Object bean, String beanName)
			throws BeansException {

		NacosConfigurationProperties nacosConfigurationProperties = findAnnotation(
				bean.getClass(), NacosConfigurationProperties.class);

		if (nacosConfigurationProperties != null) {
			bind(bean, beanName, nacosConfigurationProperties);
		}

		return bean;
	}

	private void bind(Object bean, String beanName,
			NacosConfigurationProperties nacosConfigurationProperties) {

		NacosConfigurationPropertiesBinder binder;
		try {
			binder = applicationContext.getBean(
					NacosConfigurationPropertiesBinder.BEAN_NAME,
					NacosConfigurationPropertiesBinder.class);
			if (binder == null) {
				binder = new NacosConfigurationPropertiesBinder(applicationContext);
			}

		}
		catch (Exception e) {
			binder = new NacosConfigurationPropertiesBinder(applicationContext);
		}

		binder.bind(bean, beanName, nacosConfigurationProperties);

	}

	@Override
	public Object postProcessAfterInitialization(Object bean, String beanName)
			throws BeansException {
		return bean;
	}

	@Override
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		this.applicationContext = (ConfigurableApplicationContext) applicationContext;
	}
}