org.springframework.aop.target.AbstractPrototypeBasedTargetSource Maven / Gradle / Ivy
/*
* 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.target;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
/**
* Base class for dynamic TargetSources that can create new prototype bean
* instances to support a pooling or new-instance-per-invocation strategy.
*
* Such TargetSources must run in a BeanFactory, as it needs to call the
* getBean
method to create a new prototype instance.
* Therefore, this base class extends {@link AbstractBeanFactoryBasedTargetSource}.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @see org.springframework.beans.factory.BeanFactory#getBean
* @see PrototypeTargetSource
* @see ThreadLocalTargetSource
* @see CommonsPoolTargetSource
*/
public abstract class AbstractPrototypeBasedTargetSource extends AbstractBeanFactoryBasedTargetSource {
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
super.setBeanFactory(beanFactory);
// Check whether the target bean is defined as prototype.
if (!beanFactory.isPrototype(getTargetBeanName())) {
throw new BeanDefinitionStoreException(
"Cannot use prototype-based TargetSource against non-prototype bean with name '" +
getTargetBeanName() + "': instances would not be independent");
}
}
/**
* Subclasses should call this method to create a new prototype instance.
* @throws BeansException if bean creation failed
*/
protected Object newPrototypeInstance() throws BeansException {
if (logger.isDebugEnabled()) {
logger.debug("Creating new instance of bean '" + getTargetBeanName() + "'");
}
return getBeanFactory().getBean(getTargetBeanName());
}
/**
* Subclasses should call this method to destroy an obsolote prototype instance.
* @param target the bean instance to destroy
*/
protected void destroyPrototypeInstance(Object target) {
if (logger.isDebugEnabled()) {
logger.debug("Destroying instance of bean '" + getTargetBeanName() + "'");
}
if (getBeanFactory() instanceof ConfigurableBeanFactory) {
((ConfigurableBeanFactory) getBeanFactory()).destroyBean(getTargetBeanName(), target);
}
else if (target instanceof DisposableBean) {
try {
((DisposableBean) target).destroy();
}
catch (Throwable ex) {
logger.error("Couldn't invoke destroy method of bean with name '" + getTargetBeanName() + "'", ex);
}
}
}
}