设计模式 外观模式 门面模式

结构性模式-外观模式

门面模式

适用场景：如果你需要一个指向复杂子系统的直接接口， 且该接口的功能有限， 则可以使用外观模式。

不用关心后面的查询具体操作

/*** 聚合查询接口*/
@RestController
@RequestMapping("/search")
@Slf4j
public class SearchController {@Resourceprivate SearchFacade searchFacade;@PostMapping("/all")public BaseResponse<SearchVo> searchAll(@RequestBody SearchQueryRequest searchQueryRequest, HttpServletRequest httpServletRequest) {SearchVo searchVo = searchFacade.searchAll(searchQueryRequest, httpServletRequest);return ResultUtils.success(searchVo);}
}

复杂查询逻辑放在SearchFacade里面

package com.xiaofei.site.search.controller;import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.xiaofei.site.search.common.BaseResponse;
import com.xiaofei.site.search.common.ResultUtils;
import com.xiaofei.site.search.model.dto.image.ImageQueryRequest;
import com.xiaofei.site.search.model.dto.post.PostQueryRequest;
import com.xiaofei.site.search.model.dto.search.SearchQueryRequest;
import com.xiaofei.site.search.model.dto.user.UserQueryRequest;
import com.xiaofei.site.search.model.entity.Image;
import com.xiaofei.site.search.model.enums.SearchTypeEnum;
import com.xiaofei.site.search.model.vo.PostVO;
import com.xiaofei.site.search.model.vo.SearchVo;
import com.xiaofei.site.search.model.vo.UserVO;
import com.xiaofei.site.search.service.ImageService;
import com.xiaofei.site.search.service.PostService;
import com.xiaofei.site.search.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestBody;import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;/*** @author tuaofei* @description 查询-门面模式* @date 2024/11/29*/
@Component
@Slf4j
public class SearchFacade {@Resourceprivate PostService postService;@Resourceprivate UserService userService;@Resourceprivate ImageService imageService;@ResourceThreadPoolTaskExecutor threadPoolTaskExecutor;public SearchVo searchAll(@RequestBody SearchQueryRequest searchQueryRequest, HttpServletRequest httpServletRequest) {SearchVo searchVo = new SearchVo();if (searchQueryRequest == null) {return searchVo;}String searchText = searchQueryRequest.getSearchText();String searchType = searchQueryRequest.getSearchType();if (StringUtils.isBlank(searchType)) {CompletableFuture<Page<PostVO>> postTask = CompletableFuture.supplyAsync(() -> {PostQueryRequest postQueryRequest = new PostQueryRequest();postQueryRequest.setSearchText(searchText);Page<PostVO> postVOPage = postService.listPostVoPage(postQueryRequest, httpServletRequest);return postVOPage;}, threadPoolTaskExecutor);CompletableFuture<Page<UserVO>> userTask = CompletableFuture.supplyAsync(() -> {UserQueryRequest userQueryRequest = new UserQueryRequest();userQueryRequest.setUserName(searchText);Page<UserVO> userVOPage = userService.listUserVoPage(userQueryRequest);return userVOPage;}, threadPoolTaskExecutor);CompletableFuture<Page<Image>> imageTask = CompletableFuture.supplyAsync(() -> {ImageQueryRequest imageQueryRequest = new ImageQueryRequest();imageQueryRequest.setSearchText(searchText);Page<Image> imagePage = imageService.getImageByPage(imageQueryRequest);return imagePage;}, threadPoolTaskExecutor);CompletableFuture.allOf(postTask, userTask, imageTask);try {Page<PostVO> postVOPage = postTask.get();searchVo.setPostList(postVOPage.getRecords());Page<UserVO> userVOPage = userTask.get();searchVo.setUserList(userVOPage.getRecords());Page<Image> imagePage = imageTask.get();searchVo.setImageList(imagePage.getRecords());} catch (InterruptedException | ExecutionException e) {e.printStackTrace();}} else {SearchTypeEnum searchTypeEnum = SearchTypeEnum.getEnumByValue(searchType);switch (searchTypeEnum) {case POST:PostQueryRequest postQueryRequest = new PostQueryRequest();postQueryRequest.setSearchText(searchText);Page<PostVO> postVOPage = postService.listPostVoPage(postQueryRequest, httpServletRequest);searchVo.setPostList(postVOPage.getRecords());break;case USER:UserQueryRequest userQueryRequest = new UserQueryRequest();userQueryRequest.setUserName(searchText);Page<UserVO> userVOPage = userService.listUserVoPage(userQueryRequest);searchVo.setUserList(userVOPage.getRecords());break;case IMAGE:ImageQueryRequest imageQueryRequest = new ImageQueryRequest();imageQueryRequest.setSearchText(searchText);Page<Image> imagePage = imageService.getImageByPage(imageQueryRequest);searchVo.setImageList(imagePage.getRecords());break;default:break;}}return searchVo;}
}