org.springframework.batch.core.jsr.configuration.support.ThreadLocalClassloaderBeanPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2013 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
*
* https://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.batch.core.jsr.configuration.support;
import org.springframework.beans.BeansException;
import org.springframework.beans.PropertyValue;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.core.PriorityOrdered;
/**
* After the {@link BeanFactory} is created, this post processor will evaluate to see
* if any of the beans referenced from a job definition (as defined by JSR-352) point
* to class names instead of bean names. If this is the case, a new {@link BeanDefinition}
* is added with the name of the class as the bean name.
*
* @author Michael Minella
* @since 3.0
*/
public class ThreadLocalClassloaderBeanPostProcessor implements BeanFactoryPostProcessor, PriorityOrdered {
/* (non-Javadoc)
* @see org.springframework.beans.factory.config.BeanFactoryPostProcessor#postProcessBeanFactory(org.springframework.beans.factory.config.ConfigurableListableBeanFactory)
*/
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
String[] beanNames = beanFactory.getBeanDefinitionNames();
for (String curName : beanNames) {
BeanDefinition beanDefinition = beanFactory.getBeanDefinition(curName);
PropertyValue[] values = beanDefinition.getPropertyValues().getPropertyValues();
for (PropertyValue propertyValue : values) {
Object value = propertyValue.getValue();
if(value instanceof RuntimeBeanReference) {
RuntimeBeanReference ref = (RuntimeBeanReference) value;
if(!beanFactory.containsBean(ref.getBeanName())) {
AbstractBeanDefinition newBeanDefinition = BeanDefinitionBuilder.genericBeanDefinition(ref.getBeanName()).getBeanDefinition();
newBeanDefinition.setScope("step");
((DefaultListableBeanFactory) beanFactory).registerBeanDefinition(ref.getBeanName(), newBeanDefinition);
}
}
}
}
}
/**
* Sets this {@link BeanFactoryPostProcessor} to the lowest precedence so that
* it is executed as late as possible in the chain of {@link BeanFactoryPostProcessor}s
*/
@Override
public int getOrder() {
return PriorityOrdered.LOWEST_PRECEDENCE;
}
}