DispatcherPortlet.java 文件源码

/**
 * Trigger afterCompletion callbacks on the mapped HandlerInterceptors.
 * Will just invoke afterCompletion for all interceptors whose preHandle
 * invocation has successfully completed and returned true.
 * @param mappedHandler the mapped HandlerExecutionChain
 * @param interceptorIndex index of last interceptor that successfully completed
 * @param ex Exception thrown on handler execution, or null if none
 * @see HandlerInterceptor#afterRenderCompletion
 */
private void triggerAfterEventCompletion(HandlerExecutionChain mappedHandler, int interceptorIndex,
        EventRequest request, EventResponse response, Exception ex)
        throws Exception {

    // Apply afterCompletion methods of registered interceptors.
    if (mappedHandler != null) {
        HandlerInterceptor[] interceptors = mappedHandler.getInterceptors();
        if (interceptors != null) {
            for (int i = interceptorIndex; i >= 0; i--) {
                HandlerInterceptor interceptor = interceptors[i];
                try {
                    interceptor.afterEventCompletion(request, response, mappedHandler.getHandler(), ex);
                }
                catch (Throwable ex2) {
                    logger.error("HandlerInterceptor.afterCompletion threw exception", ex2);
                }
            }
        }
    }
}