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
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|------- 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
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< dependency > < groupId >com.github.wxiaoqi</ groupId > < artifactId >ace-merge-core</ artifactId > < version >2.0-SNAPSHOT</ version > </ dependency > |
推荐仓库配置
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< 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
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@EnableAceMerge |
application.yml配置
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# 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)
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@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
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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.
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@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
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/** * @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)
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@Service @Slf4j public 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服务器之家。
原文链接:https://gitee.com/geek_qi/AG-Merge