新增文章创建索引

 文章微服务异步调用生成静态文件，上传到minIO之后发送消息到MQ，因为创建索引需要staticurl。

package com.heima.article.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.article.service.ApArticleService;
import com.heima.article.service.ArticleFreemarkerService;
import com.heima.common.constants.ArticleConstants;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.pojos.ApArticle;
import com.heima.model.search.vos.SearchArticleVo;
import freemarker.template.Configuration;
import freemarker.template.Template;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
@Transactional
public class ArticleFreemarkerServiceImpl implements ArticleFreemarkerService {


    @Autowired
    private Configuration configuration;

    @Autowired
    private FileStorageService fileStorageService;

    @Autowired
    private ApArticleService articleService;

    /**
     * 生成静态文件上传到minIO中
     * @param apArticle  获取文章内容
     * @param content    静态文件名称含有aritlceId
     */
    @Async
    @Override
    public void buildArticleToMinIO(ApArticle apArticle, String content) {
        //已知文章id
        //1、获取文章内容
        if(content != null && StringUtils.isNotBlank(content)){
            //2、文章内容通过freemarker生成html文件
            Template template = null;
            StringWriter out = new StringWriter();
            try {
                template = configuration.getTemplate("article.ftl");
                //数据模型
                Map<String, Object> contentDataModel = new HashMap<>();
                contentDataModel.put("content", JSONArray.parseArray(content));
                //合成
                template.process(contentDataModel, out);

            } catch (Exception e) {
                e.printStackTrace();
            }

            //3、把html文件上传到minio中
            ByteArrayInputStream in = new ByteArrayInputStream(out.toString().getBytes());
            String path = fileStorageService.uploadHtmlFile("", apArticle.getId()+ ".html", in);
            //4、修改ap_article表，保存static_url字段
            articleService.update(Wrappers.<ApArticle>lambdaUpdate().eq(ApArticle::getId ,apArticle.getId())
                    .set(ApArticle::getStaticUrl, path));

            //发送消息创建索引
            createArticleESIndex(apArticle, content, path);

        }
    }

    @Autowired
    private KafkaTemplate<String, String> kafkaTemplate;
    /**
     * 发送消息创建索引
     * @param apArticle
     * @param content
     * @param path
     */
    private void createArticleESIndex(ApArticle apArticle, String content, String path) {
        SearchArticleVo vo = new SearchArticleVo();
        BeanUtils.copyProperties(apArticle, vo);
        vo.setContent(content);
        vo.setStaticUrl(path);
        
        kafkaTemplate.send(ArticleConstants.ARTICLE_ES_SYNC_TOPIC, JSON.toJSONString(vo));

    }
}

搜索微服务监听消息创建索引

package com.heima.search.listener;

import com.alibaba.fastjson.JSON;
import com.heima.common.constants.ArticleConstants;
import com.heima.model.search.vos.SearchArticleVo;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;

import java.io.IOException;

@Component
@Slf4j
public class SyncArticleListener {
    @Autowired
    private RestHighLevelClient restHighLevelClient;

    @KafkaListener(topics = ArticleConstants.ARTICLE_ES_SYNC_TOPIC)
    public void onMessage(String message){
        if(StringUtils.isNotBlank(message)){

            log.info("接收到的消息为：message={}", message);

            SearchArticleVo searchArticleVo = JSON.parseObject(message, SearchArticleVo.class);
            IndexRequest indexRequest = new IndexRequest("app_info_article");
            indexRequest.id(searchArticleVo.getId().toString());
            indexRequest.source(message, XContentType.JSON);
            try {
                restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
            } catch (IOException e) {
                e.printStackTrace();
                log.error("sync es error={}", e);
            }
        }
    }
}