org.wallride.job.UpdatePostViewsItemWriter.java Source code

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Here is the source code for org.wallride.job.UpdatePostViewsItemWriter.java

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/*
 * Copyright 2014 Tagbangers, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.wallride.job;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.core.configuration.annotation.StepScope;
import org.springframework.batch.item.ItemWriter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerExecutionChain;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;
import org.wallride.domain.Post;
import org.wallride.exception.ServiceException;
import org.wallride.repository.PostRepository;
import org.wallride.service.BlogService;
import org.wallride.web.controller.guest.article.ArticleDescribeController;
import org.wallride.web.controller.guest.page.PageDescribeController;
import org.wallride.web.support.BlogLanguageRewriteMatch;
import org.wallride.web.support.BlogLanguageRewriteRule;

import javax.inject.Inject;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import java.io.IOException;
import java.util.List;

@Component
@StepScope
public class UpdatePostViewsItemWriter implements ItemWriter<List> {

    @Inject
    private ServletContext servletContext;

    @Autowired
    private BlogService blogService;

    @Autowired
    private PostRepository postRepository;

    private static Logger logger = LoggerFactory.getLogger(UpdatePostViewsItemWriter.class);

    @Override
    public void write(List<? extends List> items) throws Exception {
        WebApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(servletContext,
                "org.springframework.web.servlet.FrameworkServlet.CONTEXT.guestServlet");
        if (context == null) {
            throw new ServiceException("GuestServlet is not ready yet");
        }

        final RequestMappingHandlerMapping mapping = context.getBean(RequestMappingHandlerMapping.class);

        for (List item : items) {
            UriComponents uriComponents = UriComponentsBuilder.fromUriString((String) item.get(0)).build();
            logger.info("Processing [{}]", uriComponents.toString());

            MockHttpServletRequest request = new MockHttpServletRequest(servletContext);
            request.setMethod("GET");
            request.setRequestURI(uriComponents.getPath());
            request.setQueryString(uriComponents.getQuery());
            MockHttpServletResponse response = new MockHttpServletResponse();

            BlogLanguageRewriteRule rewriteRule = new BlogLanguageRewriteRule(blogService);
            BlogLanguageRewriteMatch rewriteMatch = (BlogLanguageRewriteMatch) rewriteRule.matches(request,
                    response);
            try {
                rewriteMatch.execute(request, response);
            } catch (ServletException e) {
                throw new ServiceException(e);
            } catch (IOException e) {
                throw new ServiceException(e);
            }

            request.setRequestURI(rewriteMatch.getMatchingUrl());

            HandlerExecutionChain handler;
            try {
                handler = mapping.getHandler(request);
            } catch (Exception e) {
                throw new ServiceException(e);
            }

            if (!(handler.getHandler() instanceof HandlerMethod)) {
                continue;
            }

            HandlerMethod method = (HandlerMethod) handler.getHandler();
            if (!method.getBeanType().equals(ArticleDescribeController.class)
                    && !method.getBeanType().equals(PageDescribeController.class)) {
                continue;
            }

            // Last path mean code of post
            String code = uriComponents.getPathSegments().get(uriComponents.getPathSegments().size() - 1);
            Post post = postRepository.findOneByCodeAndLanguage(code, rewriteMatch.getBlogLanguage().getLanguage());
            if (post == null) {
                logger.debug("Post not found [{}]", code);
                continue;
            }

            logger.info("Update the PageView. Post ID [{}]: {} -> {}", post.getId(), post.getViews(), item.get(1));
            post.setViews(Long.parseLong((String) item.get(1)));
            postRepository.saveAndFlush(post);
        }
    }
}