AG-Merge
Spring Cloud 跨服务数据聚合框架
解决问题
解决Spring Cloud服务拆分后分页数据的属性或单个对象的属性拆分之痛, 支持对静态数据属性(数据字典)、动态主键数据进行自动注入和转化, 其中聚合的静态数据会进行 一级混存 (guava).
举个栗子：
两个服务，A服务的某张表用到了B服务的某张表的值，我们在对A服务那张表查询的时候，把B服务某张表的值聚合在A服务的那次查询过程中
示例
具体示例代码可以看 ace-merge-demo 模块
|------- ace-eureka 注册中心|------- ace-data-merge-demo 查询数据,此处聚合示例|------- ace-data-provider 数据提供者
Maven添加依赖
<dependency> <groupId>com.github.wxiaoqi</groupId> <artifactId>ace-merge-core</artifactId> <version>2.0-SNAPSHOT</version></dependency>
推荐仓库配置
<repositories> <repository> <id>oss</id> <name>oss</name> <url>https://oss.sonatype.org/content/groups/public</url> </repository> </repositories>
启动类加注解
@EnableAceMerge
application.yml配置
# 跨服务数据合并merge: enabled: true guavaCacheNumMaxSize: 1000 guavaCacheRefreshWriteTime: 10 # min guavaCacheRefreshThreadPoolSize: 10 aop: # 启动注解的方式,自动聚合 enabled: true
代码示例( @MergeField 标志对象的数据需要聚合)
@Retention(RetentionPolicy.RUNTIME)@Target(value={ElementType.METHOD,ElementType.TYPE,ElementType.FIELD})public @interface MergeField { /** * 查询值 * @return */ String key() default ""; /** * 目标类 * @return */ Class<? extends Object> feign() default Object.class; /** * 调用方法 * @return */ String method() default ""; /** * 是否以属性值合并作为查询值 * @return */ boolean isValueNeedMerge() default false;}聚合对象
public class User { private String name; // 需要聚合的属性 @MergeField(key="test", feign = IService2.class,method = "writeLog") private String sex; // 需要聚合的属性 @MergeField(feign = IService2.class,method = "getCitys",isValueNeedMerge = true) private String city; public User(String name, String sex, String city) { this.name = name; this.sex = sex; this.city = city; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public User(String name) { this.name = name; } public User(String name, String sex) { this.name = name; this.sex = sex; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; }}聚合数据来源方法(示例为通过FeignClient,也可以是本地的spring bean对象)
特别要求:入参必须为一个String,返回值必须为Map<String,String>. 其中返回值的构成,就是聚合对象属性的key和对应的value.
@FeignClient("test")public interface IService2 { @RequestMapping("car/do") public Map<String, String> writeLog(String test); @RequestMapping("car/city") public Map<String, String> getCitys(String ids);}对应的远程服务接口
/** * @author ace * @create 2017/11/20. */@RestController@RequestMapping("car")public class Service2Rest { private Logger logger = LoggerFactory.getLogger(Service2Rest.class); @RequestMapping("do") public Map<String,String> writeLog(String test){ logger.info("service 2 is writing log!"); Map<String,String> map = new HashMap<String, String>(); map.put("man","男"); map.put("woman","女"); return map; } @RequestMapping("city") public Map<String,String> getCity(String ids){ logger.info("service 2 is writing log!"+ids); Map<String,String> map = new HashMap<String, String>(); map.put("1","广州"); map.put("2","武汉"); return map; }}聚合对象的Biz类(下面的方式是采用aop扫描注解的方式)
@Service@Slf4jpublic class UserBiz { @Autowired private MergeCore mergeCore; /** * aop注解的聚合方式 * 其中聚合的方法返回值必须为list, * 如果为复杂对象,则需要自定义自己的聚合解析器(实现接口IMergeResultParser) */ @MergeResult(resultParser = TestMergeResultParser.class) public List<User> getAopUser() { ArrayList<User> users = new ArrayList<User>(); for (int i = 1000; i > 0; i--) { users.add(new User("zhangsan" + i, "man", "1")); users.add(new User("lisi" + i, "woman", "2")); users.add(new User("wangwu" + i, "unkonwn", "2")); } return users; } /** * 手动聚合方式 * @return */ public List<User> getUser(){ ArrayList<User> users = new ArrayList<User>(); for (int i = 1000; i > 0; i--) { users.add(new User("zhangsan" + i, "man", "1")); users.add(new User("lisi" + i, "woman", "2")); users.add(new User("wangwu" + i, "unkonwn", "2")); } try { // list 聚合 mergeCore.mergeResult(User.class,users); // 单个对象聚合// mergeCore.mergeOne(User.class,users.get(0)); } catch (Exception e) { log.error("数据聚合失败",e); }finally { return users; } }}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。