AG-Merge
Spring Cloud 跨服務(wù)數(shù)據(jù)聚合框架
解決問題
解決Spring Cloud服務(wù)拆分后分頁數(shù)據(jù)的屬性或單個對象的屬性拆分之痛, 支持對靜態(tài)數(shù)據(jù)屬性(數(shù)據(jù)字典)、動態(tài)主鍵數(shù)據(jù)進(jìn)行自動注入和轉(zhuǎn)化, 其中聚合的靜態(tài)數(shù)據(jù)會進(jìn)行 一級混存 (guava).
舉個栗子：
兩個服務(wù)，A服務(wù)的某張表用到了B服務(wù)的某張表的值，我們在對A服務(wù)那張表查詢的時候，把B服務(wù)某張表的值聚合在A服務(wù)的那次查詢過程中
示例
具體示例代碼可以看 ace-merge-demo 模塊
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|------- ace-eureka 注冊中心|------- ace-data-merge-demo 查詢數(shù)據(jù),此處聚合示例|------- ace-data-provider 數(shù)據(jù)提供者 |
Maven添加依賴
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<dependency> <groupId>com.github.wxiaoqi</groupId> <artifactId>ace-merge-core</artifactId> <version>2.0-SNAPSHOT</version></dependency> |
推薦倉庫配置
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<repositories> <repository> <id>oss</id> <name>oss</name> <url>https://oss.sonatype.org/content/groups/public</url> </repository> </repositories> |
啟動類加注解
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@EnableAceMerge |
application.yml配置
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# 跨服務(wù)數(shù)據(jù)合并merge: enabled: true guavaCacheNumMaxSize: 1000 guavaCacheRefreshWriteTime: 10 # min guavaCacheRefreshThreadPoolSize: 10 aop: # 啟動注解的方式,自動聚合 enabled: true |
代碼示例( @MergeField 標(biāo)志對象的數(shù)據(jù)需要聚合)
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@Retention(RetentionPolicy.RUNTIME)@Target(value={ElementType.METHOD,ElementType.TYPE,ElementType.FIELD})public @interface MergeField { /** * 查詢值 * @return */ String key() default ""; /** * 目標(biāo)類 * @return */ Class<? extends Object> feign() default Object.class; /** * 調(diào)用方法 * @return */ String method() default ""; /** * 是否以屬性值合并作為查詢值 * @return */ boolean isValueNeedMerge() default false;} |
聚合對象
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public class User { private String name; // 需要聚合的屬性 @MergeField(key="test", feign = IService2.class,method = "writeLog") private String sex; // 需要聚合的屬性 @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; }} |
聚合數(shù)據(jù)來源方法(示例為通過FeignClient,也可以是本地的spring bean對象)
特別要求:入?yún)⒈仨殲橐粋€String,返回值必須為Map<String,String>. 其中返回值的構(gòu)成,就是聚合對象屬性的key和對應(yīng)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);} |
對應(yīng)的遠(yuǎn)程服務(wù)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","廣州"); map.put("2","武漢"); return map; }} |
聚合對象的Biz類(下面的方式是采用aop掃描注解的方式)
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@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須為list, * 如果為復(fù)雜對象,則需要自定義自己的聚合解析器(實現(xiàn)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; } /** * 手動聚合方式 * @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); // 單個對象聚合// mergeCore.mergeOne(User.class,users.get(0)); } catch (Exception e) { log.error("數(shù)據(jù)聚合失敗",e); }finally { return users; } }} |
以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://gitee.com/geek_qi/AG-Merge
