Example usage for org.springframework.web.servlet HandlerExecutionChain getInterceptors

List of usage examples for org.springframework.web.servlet HandlerExecutionChain getInterceptors

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Introduction

In this page you can find the example usage for org.springframework.web.servlet HandlerExecutionChain getInterceptors.

Prototype

@Nullable
public HandlerInterceptor[] getInterceptors()

Source Link

Document

Return the array of interceptors to apply (in the given order).

Usage

From source file:org.springframework.web.portlet.DispatcherPortlet.java

/**
 * 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
 *//*from   w  ww  .  ja v a 2  s . c o m*/
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);
                }
            }
        }
    }
}

From source file:org.springframework.web.servlet.HandlerExecutionChain.java

/**
 * Create a new HandlerExecutionChain.//from   w w  w  . ja v  a  2  s.  c om
 * @param handler the handler object to execute
 * @param interceptors the array of interceptors to apply
 * (in the given order) before the handler itself executes
 */
public HandlerExecutionChain(Object handler, @Nullable HandlerInterceptor... interceptors) {
    if (handler instanceof HandlerExecutionChain) {
        HandlerExecutionChain originalChain = (HandlerExecutionChain) handler;
        this.handler = originalChain.getHandler();
        this.interceptorList = new ArrayList<>();
        CollectionUtils.mergeArrayIntoCollection(originalChain.getInterceptors(), this.interceptorList);
        CollectionUtils.mergeArrayIntoCollection(interceptors, this.interceptorList);
    } else {
        this.handler = handler;
        this.interceptors = interceptors;
    }
}

From source file:org.springframework.web.servlet.MyDispatcherServlet.java

/**
 * Process the actual dispatching to the handler.
 * <p>The handler will be obtained by applying the servlet's HandlerMappings in order.
 * The HandlerAdapter will be obtained by querying the servlet's installed HandlerAdapters
 * to find the first that supports the handler class.
 * <p>All HTTP methods are handled by this method. It's up to HandlerAdapters or handlers
 * themselves to decide which methods are acceptable.
 * @param request current HTTP request//from  www  .ja  v  a  2  s.co  m
 * @param response current HTTP response
 * @throws Exception in case of any kind of processing failure
 */
protected void doDispatch(HttpServletRequest request, HttpServletResponse response) throws Exception {
    HttpServletRequest processedRequest = request;
    HandlerExecutionChain mappedHandler = null;
    int interceptorIndex = -1;

    try {
        ModelAndView mv;
        boolean errorView = false;

        try {
            processedRequest = checkMultipart(request);

            // Determine handler for the current request.
            mappedHandler = getHandler(processedRequest, false);
            if (mappedHandler == null || mappedHandler.getHandler() == null) {
                noHandlerFound(processedRequest, response);
                return;
            }

            // Determine handler adapter for the current request.
            HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());

            // Process last-modified header, if supported by the handler.
            String method = request.getMethod();
            boolean isGet = "GET".equals(method);
            if (isGet || "HEAD".equals(method)) {
                long lastModified = ha.getLastModified(request, mappedHandler.getHandler());
                if (logger.isDebugEnabled()) {
                    String requestUri = urlPathHelper.getRequestUri(request);
                    logger.debug("Last-Modified value for [" + requestUri + "] is: " + lastModified);
                }
                if (new ServletWebRequest(request, response).checkNotModified(lastModified) && isGet) {
                    return;
                }
            }

            // Apply preHandle methods of registered interceptors.
            HandlerInterceptor[] interceptors = mappedHandler.getInterceptors();
            if (interceptors != null) {
                for (int i = 0; i < interceptors.length; i++) {
                    HandlerInterceptor interceptor = interceptors[i];
                    if (!interceptor.preHandle(processedRequest, response, mappedHandler.getHandler())) {
                        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response,
                                null);
                        return;
                    }
                    interceptorIndex = i;
                }
            }

            // Actually invoke the handler.
            mv = ha.handle(processedRequest, response, mappedHandler.getHandler());

            // Do we need view name translation?
            if (mv != null && !mv.hasView()) {
                mv.setViewName(getDefaultViewName(request));
            }

            // Apply postHandle methods of registered interceptors.
            if (interceptors != null) {
                for (int i = interceptors.length - 1; i >= 0; i--) {
                    HandlerInterceptor interceptor = interceptors[i];
                    interceptor.postHandle(processedRequest, response, mappedHandler.getHandler(), mv);
                }
            }
        } catch (ModelAndViewDefiningException ex) {
            logger.debug("ModelAndViewDefiningException encountered", ex);
            mv = ex.getModelAndView();
        } catch (Exception ex) {
            Object handler = (mappedHandler != null ? mappedHandler.getHandler() : null);
            mv = processHandlerException(processedRequest, response, handler, ex);
            errorView = (mv != null);
        }

        // Did the handler return a view to render?
        if (mv != null && !mv.wasCleared()) {
            render(mv, processedRequest, response);
            if (errorView) {
                WebUtils.clearErrorRequestAttributes(request);
            }
        } else {
            if (logger.isDebugEnabled()) {
                logger.debug("Null ModelAndView returned to DispatcherServlet with name '" + getServletName()
                        + "': assuming HandlerAdapter completed request handling");
            }
        }

        // Trigger after-completion for successful outcome.
        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, null);
    }

    catch (Exception ex) {
        // Trigger after-completion for thrown exception.
        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, ex);
        throw ex;
    } catch (Error err) {
        ServletException ex = new NestedServletException("Handler processing failed", err);
        // Trigger after-completion for thrown exception.
        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, ex);
        throw ex;
    }

    finally {
        // Clean up any resources used by a multipart request.
        if (processedRequest != request) {
            cleanupMultipart(processedRequest);
        }
    }
}

From source file:org.springframework.web.servlet.MyDispatcherServlet.java

/**
 * 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 <code>null</code> if none
 * @see HandlerInterceptor#afterCompletion
 *///from w w w .ja v  a2 s  .co  m
private void triggerAfterCompletion(HandlerExecutionChain mappedHandler, int interceptorIndex,
        HttpServletRequest request, HttpServletResponse 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.afterCompletion(request, response, mappedHandler.getHandler(), ex);
                } catch (Throwable ex2) {
                    logger.error("HandlerInterceptor.afterCompletion threw exception", ex2);
                }
            }
        }
    }
}

From source file:org.springframework.web.servlet.SimpleDispatcherServlet.java

/**
 * Process the actual dispatching to the handler.
 * <p>The handler will be obtained by applying the servlet's HandlerMappings in order.
 * The HandlerAdapter will be obtained by querying the servlet's installed HandlerAdapters
 * to find the first that supports the handler class.
 * <p>All HTTP methods are handled by this method. It's up to HandlerAdapters or handlers
 * themselves to decide which methods are acceptable.
 * @param request current HTTP request/*from ww  w .  j  a  v  a 2  s. c  om*/
 * @param response current HTTP response
 * @throws Exception in case of any kind of processing failure
 */
public void doDispatch(HttpServletRequest request, HttpServletResponse response) throws Exception {
    HttpServletRequest processedRequest = request;
    HandlerExecutionChain mappedHandler = null;
    int interceptorIndex = -1;

    try {
        ModelAndView mv;
        boolean errorView = false;

        try {
            processedRequest = checkMultipart(request);

            // Determine handler for the current request.
            mappedHandler = getHandler(processedRequest, false);
            if (mappedHandler == null || mappedHandler.getHandler() == null) {
                noHandlerFound(processedRequest, response);
                return;
            }

            // Apply preHandle methods of registered interceptors.
            HandlerInterceptor[] interceptors = mappedHandler.getInterceptors();
            if (interceptors != null) {
                for (int i = 0; i < interceptors.length; i++) {
                    HandlerInterceptor interceptor = interceptors[i];
                    if (!interceptor.preHandle(processedRequest, response, mappedHandler.getHandler())) {
                        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response,
                                null);
                        return;
                    }
                    interceptorIndex = i;
                }
            }

            // Actually invoke the handler.
            HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());
            mv = ha.handle(processedRequest, response, mappedHandler.getHandler());

            // Do we need view name translation?
            if (mv != null && !mv.hasView()) {
                mv.setViewName(getDefaultViewName(request));
            }

            // Apply postHandle methods of registered interceptors.
            if (interceptors != null) {
                for (int i = interceptors.length - 1; i >= 0; i--) {
                    HandlerInterceptor interceptor = interceptors[i];
                    interceptor.postHandle(processedRequest, response, mappedHandler.getHandler(), mv);
                }
            }
        } catch (ModelAndViewDefiningException ex) {
            logger.debug("ModelAndViewDefiningException encountered", ex);
            mv = ex.getModelAndView();
        } catch (Exception ex) {
            Object handler = (mappedHandler != null ? mappedHandler.getHandler() : null);
            mv = processHandlerException(processedRequest, response, handler, ex);
            errorView = (mv != null);
        }

        // Did the handler return a view to render?
        if (mv != null && !mv.wasCleared()) {
            render(mv, processedRequest, response);
            if (errorView) {
                WebUtils.clearErrorRequestAttributes(request);
            }
        } else {
            if (logger.isDebugEnabled()) {
                logger.debug("Null ModelAndView returned to DispatcherServlet with name '" + getServletName()
                        + "': assuming HandlerAdapter completed request handling");
            }
        }

        // Trigger after-completion for successful outcome.
        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, null);
    }

    catch (Exception ex) {
        // Trigger after-completion for thrown exception.
        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, ex);
        throw ex;
    } catch (Error err) {
        ServletException ex = new NestedServletException("Handler processing failed", err);
        // Trigger after-completion for thrown exception.
        triggerAfterCompletion(mappedHandler, interceptorIndex, processedRequest, response, ex);
        throw ex;
    }

    finally {
        // Clean up any resources used by a multipart request.
        if (processedRequest != request) {
            cleanupMultipart(processedRequest);
        }
    }
}