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Add @MessageExceptionHandler

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Similar to @ExceptionHandler but for message processing. Such a method
can send messages to both the message broker channel and the client
channel provided the client is subscribed to the target destination.
This commit is contained in:
Rossen Stoyanchev
2013-06-19 22:17:59 -04:00
parent 01c4e458c7
commit 55a212d4a0
7 changed files with 236 additions and 22 deletions
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14
spring-web/src/main/java/org/springframework/web/method/annotation/ExceptionHandlerMethodResolver.java
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@@ -56,13 +56,17 @@ public class ExceptionHandlerMethodResolver {
* @param handlerType the type to introspect
*/
public ExceptionHandlerMethodResolver(Class<?> handlerType) {
for (Method method : HandlerMethodSelector.selectMethods(handlerType, EXCEPTION_HANDLER_METHODS)) {
for (Method method : HandlerMethodSelector.selectMethods(handlerType, getExceptionHandlerMethods())) {
for (Class<? extends Throwable> exceptionType : detectExceptionMappings(method)) {
addExceptionMapping(exceptionType, method);
}
}
}
protected MethodFilter getExceptionHandlerMethods() {
return EXCEPTION_HANDLER_METHODS;
}
/**
* Extract exception mappings from the {@code @ExceptionHandler} annotation
* first and as a fall-back from the method signature.
@@ -71,8 +75,7 @@ public class ExceptionHandlerMethodResolver {
private List<Class<? extends Throwable>> detectExceptionMappings(Method method) {
List<Class<? extends Throwable>> result = new ArrayList<Class<? extends Throwable>>();
ExceptionHandler annotation = AnnotationUtils.findAnnotation(method, ExceptionHandler.class);
result.addAll(Arrays.asList(annotation.value()));
detectAnnotationExceptionMappings(method, result);
if (result.isEmpty()) {
for (Class<?> paramType : method.getParameterTypes()) {
@@ -87,6 +90,11 @@ public class ExceptionHandlerMethodResolver {
return result;
}
protected void detectAnnotationExceptionMappings(Method method, List<Class<? extends Throwable>> result) {
ExceptionHandler annotation = AnnotationUtils.findAnnotation(method, ExceptionHandler.class);
result.addAll(Arrays.asList(annotation.value()));
}
private void addExceptionMapping(Class<? extends Throwable> exceptionType, Method method) {
Method oldMethod = this.mappedMethods.put(exceptionType, method);
if (oldMethod != null && !oldMethod.equals(method)) {