org.apache.shiro.spring.ShiroEventBusBeanPostProcessor Maven / Gradle / Ivy
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.shiro.spring;
import org.apache.shiro.event.EventBus;
import org.apache.shiro.event.EventBusAware;
import org.apache.shiro.event.Subscribe;
import org.apache.shiro.util.ClassUtils;
import org.apache.shiro.util.CollectionUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import java.util.List;
/**
* Spring {@link BeanPostProcessor} that detects, {@link EventBusAware} and classes containing {@link Subscribe @Subscribe} methods.
* Any classes implementing EventBusAware will have the setEventBus() method called with the eventBus. Any
* classes discovered with methods that are annotated with @Subscribe will be automaticly registered with the EventBus.
*
* NOTE: in a Spring environment implementing EventBusAware is not necessary, as you can just inject the EventBus with
* {@link org.springframework.beans.factory.annotation.Autowire @Autowire}.
*
* @see EventBusAware
* @see Subscribe
* @since 1.4
*/
public class ShiroEventBusBeanPostProcessor implements BeanPostProcessor {
final private EventBus eventBus;
public ShiroEventBusBeanPostProcessor(EventBus eventBus) {
this.eventBus = eventBus;
}
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
if (bean instanceof EventBusAware) {
((EventBusAware) bean).setEventBus(eventBus);
}
else if (isEventSubscriber(bean)) {
eventBus.register(bean);
}
return bean;
}
private boolean isEventSubscriber(Object bean) {
List annotatedMethods = ClassUtils.getAnnotatedMethods(bean.getClass(), Subscribe.class);
return !CollectionUtils.isEmpty(annotatedMethods);
}
}