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EventListenerMethodProcessor defensively handles unresolvable method signatures 

Issue: SPR-14330
This commit is contained in:
Juergen Hoeller 2016-06-04 00:15:52 +02:00
parent 9394616f8f
commit f657952cee
1 changed files with 18 additions and 8 deletions
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26
spring-context/src/main/java/org/springframework/context/event/EventListenerMethodProcessor.java
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@ -42,6 +42,7 @@ import org.springframework.core.MethodIntrospector;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.core.annotation.AnnotationAwareOrderComparator;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
/**
* Register {@link EventListener} annotated method as individual {@link ApplicationListener}
@ -125,14 +126,23 @@ public class EventListenerMethodProcessor implements SmartInitializingSingleton,
protected void processBean(final List<EventListenerFactory> factories, final String beanName, final Class<?> targetType) {
if (!this.nonAnnotatedClasses.contains(targetType)) {
Map<Method, EventListener> annotatedMethods = MethodIntrospector.selectMethods(targetType,
new MethodIntrospector.MetadataLookup<EventListener>() {
@Override
public EventListener inspect(Method method) {
return AnnotatedElementUtils.findMergedAnnotation(method, EventListener.class);
}
});
if (annotatedMethods.isEmpty()) {
Map<Method, EventListener> annotatedMethods = null;
try {
annotatedMethods = MethodIntrospector.selectMethods(targetType,
new MethodIntrospector.MetadataLookup<EventListener>() {
@Override
public EventListener inspect(Method method) {
return AnnotatedElementUtils.findMergedAnnotation(method, EventListener.class);
}
});
}
catch (Throwable ex) {
// An unresolvable type in a method signature, probably from a lazy bean - let's ignore it.
if (logger.isDebugEnabled()) {
logger.debug("Could not resolve methods for bean with name '" + beanName + "'", ex);
}
}
if (CollectionUtils.isEmpty(annotatedMethods)) {
this.nonAnnotatedClasses.add(targetType);
if (logger.isTraceEnabled()) {
logger.trace("No @EventListener annotations found on bean class: " + targetType);