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线上课缓存

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none 2023-03-20 18:02:13 +08:00
parent efb3a69498
commit ee248b483d
2 changed files with 52 additions and 6 deletions
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42
src/main/java/xyz/playedu/api/caches/CourseCache.java Normal file
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@ -0,0 +1,42 @@
package xyz.playedu.api.caches;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import xyz.playedu.api.domain.Course;
import xyz.playedu.api.exception.NotFoundException;
import xyz.playedu.api.service.CourseService;
import xyz.playedu.api.util.RedisUtil;
/**
* @Author 杭州白书科技有限公司
* @create 2023/3/20 17:57
*/
@Component
public class CourseCache {
@Autowired
private CourseService courseService;
private final static String keyTemplate = "course:%d";
private final static int expire = 3600;//s
public Course findOrFail(Integer id) throws NotFoundException {
String keyName = key(id);
if (RedisUtil.exists(keyName)) {
return (Course) RedisUtil.get(keyName);
}
Course course = courseService.findOrFail(id);
put(course);
return course;
}
public void put(Course course) {
RedisUtil.set(key(course.getId()), course, expire);
}
private String key(Integer courseId) {
return String.format(keyTemplate, courseId);
}
}

16
src/main/java/xyz/playedu/api/controller/frontend/HourController.java
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@ -4,6 +4,7 @@ import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import xyz.playedu.api.PlayEduFCtx;
import xyz.playedu.api.caches.CourseCache;
import xyz.playedu.api.caches.UserCanSeeCourseCache;
import xyz.playedu.api.domain.*;
import xyz.playedu.api.exception.NotFoundException;
@ -31,18 +32,21 @@ public class HourController {
@Autowired
private CourseHourService hourService;
@Autowired
private UserCanSeeCourseCache userCanSeeCourseCache;
@Autowired
private ResourceService resourceService;
@Autowired
private UserCourseHourRecordService userCourseHourRecordService;
@Autowired
private UserCanSeeCourseCache userCanSeeCourseCache;
@Autowired
private CourseCache courseCache;
@GetMapping("/{id}/play")
public JsonResponse play(@PathVariable(name = "courseId") Integer courseId, @PathVariable(name = "id") Integer id) throws NotFoundException, ServiceException {
Course course = courseService.findOrFail(courseId);
Course course = courseCache.findOrFail(courseId);
userCanSeeCourseCache.check(PlayEduFCtx.getUser(), course, true);
CourseHour hour = hourService.findOrFail(id, courseId);
Resource resource = resourceService.findOrFail(hour.getRid());
@ -63,7 +67,7 @@ public class HourController {
}
User user = PlayEduFCtx.getUser();
// 线上课检测
Course course = courseService.findOrFail(courseId);
Course course = courseCache.findOrFail(courseId);
// 权限校验
userCanSeeCourseCache.check(user, course, true);
// 课时检测
@ -76,7 +80,7 @@ public class HourController {
@PostMapping("/{id}/ping")
public JsonResponse ping(@PathVariable(name = "courseId") Integer courseId, @PathVariable(name = "id") Integer id) throws NotFoundException, ServiceException {
Course course = courseService.findOrFail(courseId);
Course course = courseCache.findOrFail(courseId);
userCanSeeCourseCache.check(PlayEduFCtx.getUser(), course, true);
return JsonResponse.success();
}