Spring Cloud 跨服务数据聚合框架
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).
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
<dependency>
<groupId>com.github.wxiaoqi</groupId>
<artifactId>ace-merge-core</artifactId>
<version>2.0-SNAPSHOT</version>
</dependency>
@EnableAceMerge
# 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
@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
@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;
}
}
}
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