feat: new posts

package.json

@@ -3,7 +3,7 @@
   "version": "0.0.0",
   "private": true,
   "hexo": {
-    "version": "6.3.0"
+    "version": "7.3.0"
   },
   "scripts": {
     "c": "git pull && git cz && git push"
@@ -32,4 +32,4 @@
       "path": "./node_modules/cz-conventional-changelog"
     }
   }
-}
+}

source/_posts/2024/spring-boot-custom-arguments.md

@@ -0,0 +1,97 @@
+---
+title: Spring Boot自定义参数处理实体ID
+mathjax: false
+date: 2024-11-13 11:45:14
+categories: [技术]
+tags: ['Spring Boot']
+---
+## Spring Boot自定义参数处理实体ID
+在实际业务中经常需要判断接收的实体ID是否在表中存在和向线程中注入该实体ID对应的数据，下面摘录了两种思路：
+### 实现Converter来获取主键ID
+```java
+@RestController
+class GitRepositoryController {
+
+  @GetMapping("/repositories/{repoId}")
+  String getSomething(@PathVariable("repoId") GitRepositoryId repositoryId) {
+    // ... load and return repository
+  }
+
+}
+
+```
+```java
+@Value
+class GitRepositoryId {
+  private final long value;
+
+  public static GitRepositoryId valueOf(String value){
+    return new GitRepositoryId(Long.parseLong(value));
+  }
+}
+
+```
+```java
+@Component
+class GitRepositoryIdConverter implements Converter<String, GitRepositoryId> {
+
+  @Override
+  public GitRepositoryId convert(String source) {
+    // TODO 这里可以增加 exist 检测 和 在线程上下文中注入实体信息
+    return new GitRepositoryId(Long.parseLong(source));
+  }
+}
+
+```
+### 实现 HandlerMethodArgumentResolver 
+```java
+@RequiredArgsConstructor
+class GitRepositoryArgumentResolver implements HandlerMethodArgumentResolver {
+
+  private final GitRepositoryFinder repositoryFinder;
+
+  @Override
+  public boolean supportsParameter(MethodParameter parameter) {
+    return parameter.getParameter().getType() == GitRepository.class;
+  }
+
+  @Override
+  public Object resolveArgument(
+      MethodParameter parameter,
+      ModelAndViewContainer mavContainer,
+      NativeWebRequest webRequest,
+      WebDataBinderFactory binderFactory) {
+
+    String requestPath = ((ServletWebRequest) webRequest)
+      .getRequest()
+      .getPathInfo();
+
+    String slug = requestPath
+        .substring(0, requestPath.indexOf("/", 1))
+        .replaceAll("^/", "");
+
+    return gitRepositoryFinder.findBySlug(slug)
+            .orElseThrow(NotFoundException::new);
+  }
+}
+
+```
+```java
+@Component
+@RequiredArgsConstructor
+class GitRepositoryArgumentResolverConfiguration implements WebMvcConfigurer {
+
+  private final GitRepositoryFinder repositoryFinder;
+
+  @Override
+  public void addArgumentResolvers(
+      List<HandlerMethodArgumentResolver> resolvers) {
+    resolvers.add(new GitRepositoryArgumentResolver(repositoryFinder));
+  }
+
+}
+
+```
+### REF
+- [Custom Web Controller Arguments with Spring MVC and Spring Boot](https://reflectoring.io/spring-boot-argumentresolver/)
+- [ 小伙伴同学们写的 TTL实际业务使用场景 与 设计实现解析的文章（写得都很好！ ）❤️ #123 ](https://github.com/alibaba/transmittable-thread-local/issues/123)