Example usage for org.springframework.messaging.handler.invocation AbstractExceptionHandlerMethodResolver resolveMethod

Introduction

In this page you can find the example usage for org.springframework.messaging.handler.invocation AbstractExceptionHandlerMethodResolver resolveMethod.

Prototype

@Nullable
public Method resolveMethod(Throwable exception) 

Source Link

Document

Find a Method to handle the given exception.

Usage

From source file:org.springframework.messaging.handler.invocation.AbstractMethodMessageHandler.java

/**
 * Find an {@code @MessageExceptionHandler} method for the given exception.
 * The default implementation searches methods in the class hierarchy of the
 * HandlerMethod first and if not found, it continues searching for additional
 * {@code @MessageExceptionHandler} methods among the configured
 * {@linkplain org.springframework.messaging.handler.MessagingAdviceBean
 * MessagingAdviceBean}, if any./* www  .  ja v  a  2 s  .c  o  m*/
 * @param handlerMethod the method where the exception was raised
 * @param exception the raised exception
 * @return a method to handle the exception, or {@code null}
 * @since 4.2
 */
@Nullable
protected InvocableHandlerMethod getExceptionHandlerMethod(HandlerMethod handlerMethod, Exception exception) {
    if (logger.isDebugEnabled()) {
        logger.debug("Searching methods to handle " + exception.getClass().getSimpleName());
    }
    Class<?> beanType = handlerMethod.getBeanType();
    AbstractExceptionHandlerMethodResolver resolver = this.exceptionHandlerCache.get(beanType);
    if (resolver == null) {
        resolver = createExceptionHandlerMethodResolverFor(beanType);
        this.exceptionHandlerCache.put(beanType, resolver);
    }
    Method method = resolver.resolveMethod(exception);
    if (method != null) {
        return new InvocableHandlerMethod(handlerMethod.getBean(), method);
    }
    for (MessagingAdviceBean advice : this.exceptionHandlerAdviceCache.keySet()) {
        if (advice.isApplicableToBeanType(beanType)) {
            resolver = this.exceptionHandlerAdviceCache.get(advice);
            method = resolver.resolveMethod(exception);
            if (method != null) {
                return new InvocableHandlerMethod(advice.resolveBean(), method);
            }
        }
    }
    return null;
}

---

From source file:org.springframework.messaging.handler.invocation.reactive.InvocableHelper.java

/**
 * Find an exception handling method for the given exception.
 * <p>The default implementation searches methods in the class hierarchy of
 * the HandlerMethod first and if not found, it continues searching for
 * additional handling methods registered via
 * {@link #registerExceptionHandlerAdvice}.
 * @param handlerMethod the method where the exception was raised
 * @param ex the exception raised or signaled
 * @return a method to handle the exception, or {@code null}
 */// w  w  w  .java  2s  . c o  m
@Nullable
public InvocableHandlerMethod initExceptionHandlerMethod(HandlerMethod handlerMethod, Throwable ex) {
    if (logger.isDebugEnabled()) {
        logger.debug("Searching for methods to handle " + ex.getClass().getSimpleName());
    }
    Class<?> beanType = handlerMethod.getBeanType();
    AbstractExceptionHandlerMethodResolver resolver = this.exceptionHandlerCache.get(beanType);
    if (resolver == null) {
        resolver = this.exceptionMethodResolverFactory.apply(beanType);
        this.exceptionHandlerCache.put(beanType, resolver);
    }
    InvocableHandlerMethod exceptionHandlerMethod = null;
    Method method = resolver.resolveMethod(ex);
    if (method != null) {
        exceptionHandlerMethod = new InvocableHandlerMethod(handlerMethod.getBean(), method);
    } else {
        for (Map.Entry<MessagingAdviceBean, AbstractExceptionHandlerMethodResolver> entry : this.exceptionHandlerAdviceCache
                .entrySet()) {
            MessagingAdviceBean advice = entry.getKey();
            if (advice.isApplicableToBeanType(beanType)) {
                resolver = entry.getValue();
                method = resolver.resolveMethod(ex);
                if (method != null) {
                    exceptionHandlerMethod = new InvocableHandlerMethod(advice.resolveBean(), method);
                    break;
                }
            }
        }
    }
    if (exceptionHandlerMethod != null) {
        logger.debug("Found exception handler " + exceptionHandlerMethod.getShortLogMessage());
        exceptionHandlerMethod.setArgumentResolvers(this.argumentResolvers.getResolvers());
    } else {
        logger.error("No exception handling method", ex);
    }
    return exceptionHandlerMethod;
}

---