From a5e53dccaaa1858a067e5ae46b4ed8b918eaf632 Mon Sep 17 00:00:00 2001 From: YuLuo <1481556636@qq.com> Date: Tue, 7 Feb 2023 12:00:00 +0800 Subject: [PATCH] add WebClient example (#3140) --- .../appactive-example/common/pom.xml | 4 + .../cloud/example/common/Constants.java | 15 ++++ .../cloud/example/common/ProductService.java | 38 +++++++++ .../alibaba/cloud/example/common/RPCType.java | 2 +- .../example/common/service/ProductDAO.java | 63 ++++++-------- .../service/strategy/FeignProductService.java | 51 ++++++++++++ .../strategy/RestTemplateProductService.java | 79 ++++++++++++++++++ .../strategy/WebClientProductService.java | 82 +++++++++++++++++++ .../frontend/controller/FrontController.java | 58 ++++++++++--- .../appactive-example/readme-zh.md | 10 +-- 10 files changed, 344 insertions(+), 58 deletions(-) create mode 100644 spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/ProductService.java create mode 100644 spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/FeignProductService.java create mode 100644 spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/RestTemplateProductService.java create mode 100644 spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/WebClientProductService.java diff --git a/spring-cloud-alibaba-examples/appactive-example/common/pom.xml b/spring-cloud-alibaba-examples/appactive-example/common/pom.xml index bd11bb4cd..a7a1b09f8 100644 --- a/spring-cloud-alibaba-examples/appactive-example/common/pom.xml +++ b/spring-cloud-alibaba-examples/appactive-example/common/pom.xml @@ -21,6 +21,10 @@ org.springframework.boot spring-boot-starter-data-jpa + + org.springframework.boot + spring-boot-starter-webflux + org.springframework.boot spring-boot-starter-web diff --git a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/Constants.java b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/Constants.java index 47b5326ec..5a150779b 100644 --- a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/Constants.java +++ b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/Constants.java @@ -26,6 +26,21 @@ public final class Constants { */ public static final String CENTER_FLAG = "center"; + /** + * Feign. + */ + public static final String FEIGN = "Feign"; + + /** + * RestTemplate. + */ + public static final String REST_TEMPLATE = "RestTemplate"; + + /** + * WebClient. + */ + public static final String WEB_CLIENT = "WebClient"; + private Constants() { } diff --git a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/ProductService.java b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/ProductService.java new file mode 100644 index 000000000..871ee1ab9 --- /dev/null +++ b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/ProductService.java @@ -0,0 +1,38 @@ +/* + * Copyright 2013-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * https://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.alibaba.cloud.example.common; + +import java.util.List; + +import com.alibaba.cloud.example.common.entity.Product; +import com.alibaba.cloud.example.common.entity.ResultHolder; + +/** + * @author yuluo + */ + +public interface ProductService { + + ResultHolder> list(); + + ResultHolder detail(String rId, String pId); + + ResultHolder detailHidden(String pId); + + ResultHolder buy(String rpcType, String rId, String pId, Integer number); + +} diff --git a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/RPCType.java b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/RPCType.java index d493b6d5b..ee9969148 100644 --- a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/RPCType.java +++ b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/RPCType.java @@ -25,6 +25,6 @@ public enum RPCType { /** * Spring Cloud. */ - SpringCloud + SpringCloud, } diff --git a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/ProductDAO.java b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/ProductDAO.java index bebd4f492..ca9e90f25 100644 --- a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/ProductDAO.java +++ b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/ProductDAO.java @@ -16,19 +16,17 @@ package com.alibaba.cloud.example.common.service; -import java.util.HashMap; import java.util.List; -import java.util.Map; import com.alibaba.cloud.example.common.RPCType; import com.alibaba.cloud.example.common.entity.Product; import com.alibaba.cloud.example.common.entity.ResultHolder; +import com.alibaba.cloud.example.common.service.strategy.FeignProductService; +import com.alibaba.cloud.example.common.service.strategy.RestTemplateProductService; +import com.alibaba.cloud.example.common.service.strategy.WebClientProductService; import org.springframework.beans.factory.annotation.Autowired; -import org.springframework.cloud.openfeign.FeignClient; import org.springframework.stereotype.Service; -import org.springframework.web.bind.annotation.RequestMapping; -import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.client.RestTemplate; @Service @@ -38,61 +36,48 @@ public class ProductDAO { RestTemplate restTemplate; @Autowired - private ProductService productService; + private FeignProductService feignProductService; + + @Autowired + private RestTemplateProductService restTemplateProductService; + + @Autowired + private WebClientProductService webClientProductService; public ResultHolder> list() { - return productService.list(); + return feignProductService.list(); } public ResultHolder detail(String rId, String pId) { - return productService.detail(rId, pId); + return feignProductService.detail(rId, pId); } public ResultHolder detailHidden(String pId) { - return productService.detailHidden(pId); + return feignProductService.detailHidden(pId); } public ResultHolder buy(String rId, String pId, Integer number) { - return productService.buy(RPCType.SpringCloud.name(), rId, pId, number); + return feignProductService.buy(RPCType.SpringCloud.name(), rId, pId, number); } - public ResultHolder> listTemplate() { - if (restTemplate != null) { - return restTemplate.getForObject("http://product/list", ResultHolder.class); - } - return productService.list(); - } + public ResultHolder> listByRestTemplate() { - public ResultHolder detailTemplate(String rId, String pId) { - if (restTemplate != null) { - Map params = new HashMap<>(2); - params.put("rId", rId); - params.put("pId", pId); - return restTemplate.getForObject("http://product/detail", ResultHolder.class, - params); - } - return productService.detail(rId, pId); + return restTemplateProductService.list(); } - @FeignClient(name = "product") - public interface ProductService { + public ResultHolder detailByRestTemplate(String rId, String pId) { - @RequestMapping("/list/") - ResultHolder> list(); + return restTemplateProductService.detail(rId, pId); + } - @RequestMapping("/detail/") - ResultHolder detail(@RequestParam(name = "rId") String rId, - @RequestParam(name = "pId") String pId); + public ResultHolder> listByWebClient() { - @RequestMapping("/detailHidden/") - ResultHolder detailHidden(@RequestParam(name = "pId") String pId); + return webClientProductService.list(); + } - @RequestMapping("/buy/") - ResultHolder buy(@RequestParam(name = "rpcType") String rpcType, - @RequestParam(name = "rId") String rId, - @RequestParam(name = "pId") String pId, - @RequestParam(name = "number") Integer number); + public ResultHolder detailByWebClient(String rId, String pId) { + return webClientProductService.detail(rId, pId); } } diff --git a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/FeignProductService.java b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/FeignProductService.java new file mode 100644 index 000000000..d73487f67 --- /dev/null +++ b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/FeignProductService.java @@ -0,0 +1,51 @@ +/* + * Copyright 2013-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * https://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.alibaba.cloud.example.common.service.strategy; + +import java.util.List; + +import com.alibaba.cloud.example.common.entity.Product; +import com.alibaba.cloud.example.common.entity.ResultHolder; + +import org.springframework.cloud.openfeign.FeignClient; +import org.springframework.web.bind.annotation.RequestMapping; +import org.springframework.web.bind.annotation.RequestParam; + +/** + * @author yuluo + */ + +@FeignClient(name = "product") +public interface FeignProductService { + + @RequestMapping("/list/") + ResultHolder> list(); + + @RequestMapping("/detail/") + ResultHolder detail(@RequestParam(name = "rId") String rId, + @RequestParam(name = "pId") String pId); + + @RequestMapping("/detailHidden/") + ResultHolder detailHidden(@RequestParam(name = "pId") String pId); + + @RequestMapping("/buy/") + ResultHolder buy(@RequestParam(name = "rpcType") String rpcType, + @RequestParam(name = "rId") String rId, + @RequestParam(name = "pId") String pId, + @RequestParam(name = "number") Integer number); + +} diff --git a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/RestTemplateProductService.java b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/RestTemplateProductService.java new file mode 100644 index 000000000..39191e6a6 --- /dev/null +++ b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/RestTemplateProductService.java @@ -0,0 +1,79 @@ +/* + * Copyright 2013-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * https://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.alibaba.cloud.example.common.service.strategy; + +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +import com.alibaba.cloud.example.common.ProductService; +import com.alibaba.cloud.example.common.entity.Product; +import com.alibaba.cloud.example.common.entity.ResultHolder; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Component; +import org.springframework.web.client.RestTemplate; + +/** + * @author yuluo + */ + +@Component +public class RestTemplateProductService implements ProductService { + + @Autowired(required = false) + RestTemplate restTemplate; + + @Autowired + private FeignProductService feignProductService; + + @Override + public ResultHolder> list() { + if (restTemplate != null) { + return restTemplate.getForObject("http://product/list", ResultHolder.class); + } + return feignProductService.list(); + } + + @Override + public ResultHolder detail(String rId, String pId) { + + if (restTemplate != null) { + Map params = new HashMap<>(2); + params.put("rId", rId); + params.put("pId", pId); + return restTemplate.getForObject("http://product/detail", ResultHolder.class, + params); + } + + return feignProductService.detail(rId, pId); + } + + @Override + public ResultHolder detailHidden(String pId) { + + return feignProductService.detailHidden(pId); + } + + @Override + public ResultHolder buy(String rpcType, String rId, String pId, + Integer number) { + + return feignProductService.buy(rpcType, rId, pId, number); + } + +} diff --git a/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/WebClientProductService.java b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/WebClientProductService.java new file mode 100644 index 000000000..ff4e5a65c --- /dev/null +++ b/spring-cloud-alibaba-examples/appactive-example/common/src/main/java/com/alibaba/cloud/example/common/service/strategy/WebClientProductService.java @@ -0,0 +1,82 @@ +/* + * Copyright 2013-2018 the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * https://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.alibaba.cloud.example.common.service.strategy; + +import java.util.List; + +import com.alibaba.cloud.example.common.ProductService; +import com.alibaba.cloud.example.common.entity.Product; +import com.alibaba.cloud.example.common.entity.ResultHolder; +import reactor.core.publisher.Mono; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Component; +import org.springframework.web.reactive.function.client.WebClient; + +/** + * @author yuluo + */ + +@Component +public class WebClientProductService implements ProductService { + + @Autowired(required = false) + WebClient webClient; + + @Autowired + private FeignProductService feignProductService; + + @Override + public ResultHolder> list() { + if (webClient != null) { + Mono resultHolderMono = webClient.get() + .uri("http://product/list").retrieve().bodyToMono(ResultHolder.class); + return resultHolderMono.block(); + } + return feignProductService.list(); + } + + @Override + public ResultHolder detail(String rId, String pId) { + + if (webClient != null) { + Mono resultHolderMono = webClient.get() + .uri(uriBuilder -> uriBuilder.scheme("http").host("product") + .path("/detail").queryParam("rId", rId).queryParam("pId", pId) + .build()) + .retrieve().bodyToMono(ResultHolder.class); + + return resultHolderMono.block(); + } + + return feignProductService.detail(rId, pId); + } + + @Override + public ResultHolder detailHidden(String pId) { + + return feignProductService.detailHidden(pId); + } + + @Override + public ResultHolder buy(String rpcType, String rId, String pId, + Integer number) { + + return feignProductService.buy(rpcType, rId, pId, number); + } + +} diff --git a/spring-cloud-alibaba-examples/appactive-example/frontend/src/main/java/com/alibaba/cloud/example/frontend/controller/FrontController.java b/spring-cloud-alibaba-examples/appactive-example/frontend/src/main/java/com/alibaba/cloud/example/frontend/controller/FrontController.java index d7eee3296..14118a9b6 100644 --- a/spring-cloud-alibaba-examples/appactive-example/frontend/src/main/java/com/alibaba/cloud/example/frontend/controller/FrontController.java +++ b/spring-cloud-alibaba-examples/appactive-example/frontend/src/main/java/com/alibaba/cloud/example/frontend/controller/FrontController.java @@ -19,10 +19,12 @@ package com.alibaba.cloud.example.frontend.controller; import java.util.HashMap; import java.util.List; import java.util.Map; +import java.util.Objects; import javax.annotation.PostConstruct; import javax.annotation.Resource; +import com.alibaba.cloud.example.common.Constants; import com.alibaba.cloud.example.common.RPCType; import com.alibaba.cloud.example.common.entity.Product; import com.alibaba.cloud.example.common.entity.ResultHolder; @@ -103,12 +105,26 @@ public class FrontController { @GetMapping("/listProduct") public String listProduct( @CookieValue(value = "rpc_type", required = false, - defaultValue = "Dubbo") RPCType rpcType, - @RequestParam(required = false, defaultValue = "feign") String call, + defaultValue = "SpringCloud") RPCType rpcType, + @RequestParam(required = false, defaultValue = Constants.FEIGN) String call, Model model) { // normal - ResultHolder> resultHolder = (call.equals("feign") - ? productDAO.list() : productDAO.listTemplate()); + ResultHolder> resultHolder; + + // Determine the method of the request + switch (call) { + case Constants.FEIGN: + resultHolder = productDAO.list(); + break; + case Constants.REST_TEMPLATE: + resultHolder = productDAO.listByRestTemplate(); + break; + case Constants.WEB_CLIENT: + resultHolder = productDAO.listByWebClient(); + break; + default: + throw new IllegalArgumentException("The web request is malformed."); + } model.addAttribute("result", JSON.toJSONString(resultHolder.getResult())); model.addAttribute("products", resultHolder.getResult()); @@ -120,10 +136,10 @@ public class FrontController { @GetMapping("/detailProduct") public String detailProduct( @CookieValue(value = "rpc_type", required = false, - defaultValue = "Dubbo") RPCType rpcType, + defaultValue = "SpringCloud") RPCType rpcType, @RequestParam(required = false, defaultValue = "12") String id, @RequestParam(required = false, defaultValue = "false") Boolean hidden, - @RequestParam(required = false, defaultValue = "feign") String call, + @RequestParam(required = false, defaultValue = Constants.FEIGN) String call, Model model) { // unit ResultHolder resultHolder = getProductResultHolder(rpcType, id, hidden, @@ -138,21 +154,39 @@ public class FrontController { private ResultHolder getProductResultHolder(RPCType rpcType, String id, Boolean hidden, String call) { + + // normal ResultHolder resultHolder; - resultHolder = hidden ? productDAO.detailHidden(id) - : (call.equals("feign") - ? productDAO.detail(AppContextClient.getRouteId(), id) - : productDAO.detailTemplate(AppContextClient.getRouteId(), id)); + + if (Objects.equals(hidden, true)) { + return productDAO.detailHidden(id); + } + + // Determine the method of the request + switch (call) { + case Constants.FEIGN: + resultHolder = productDAO.detail(AppContextClient.getRouteId(), id); + break; + case Constants.REST_TEMPLATE: + resultHolder = productDAO.detailByRestTemplate(AppContextClient.getRouteId(), id); + break; + case Constants.WEB_CLIENT: + resultHolder = productDAO.detailByWebClient(AppContextClient.getRouteId(), id); + break; + default: + throw new IllegalArgumentException("The web request is malformed."); + } + return resultHolder; } @RequestMapping("/buyProduct") public String buyProduct( @CookieValue(value = "rpc_type", required = false, - defaultValue = "Dubbo") RPCType rpcType, + defaultValue = "SpringCloud") RPCType rpcType, @RequestParam(required = false, defaultValue = "12") String pId, @RequestParam(required = false, defaultValue = "1") Integer number, - @RequestParam(required = false, defaultValue = "feign") String call, + @RequestParam(required = false, defaultValue = Constants.FEIGN) String call, Model model) { // unit ResultHolder resultHolder = productDAO.buy(AppContextClient.getRouteId(), diff --git a/spring-cloud-alibaba-examples/appactive-example/readme-zh.md b/spring-cloud-alibaba-examples/appactive-example/readme-zh.md index 373aa0054..60939517f 100644 --- a/spring-cloud-alibaba-examples/appactive-example/readme-zh.md +++ b/spring-cloud-alibaba-examples/appactive-example/readme-zh.md @@ -78,7 +78,6 @@ - `appactive.dataId.trafficRouteRulePath`: 描述路由标和单元的映射关系 - `appactive.dataId.dataScopeRuleDirectoryPath_mysql-product`: 描述数据库的属性 - 2. 启动 5 套应用，启动参数分别为： - frontend @@ -132,9 +131,9 @@ ![](../../spring-cloud-alibaba-docs/src/main/asciidoc-zh/pic/image-2022-09-15-16-16-25-989.png) - 由于上述路径中的 `/listProduct` 在 product 应用中匹配到的是 `/*` 路径规则，根据规则内容，该服务属于普通应用做了未做单元化拆分，所以frontend 在从注册中心获取的 product 地址列表中不存在倾向性，会随机选择地址进行请求发送。因此多次请求上述路径，会看到请求在 product 的一般（Unit)和 中心（center）单元应用中来回切换。 + 由于上述路径中的 `/listProduct` 在 product 应用中匹配到的是 `/*` 路径规则，根据规则内容，该服务属于普通应用未做单元化拆分，所以frontend 在从注册中心获取的 product 地址列表中不存在倾向性，会随机选择地址进行请求发送。因此多次请求上述路径，会看到请求在 product 的一般（Unit)和 中心（center）单元应用中来回切换。 -2. 归属于 unit 单元的核心应用服务调用演示。在浏览器中输入：`http://127.0.0.1:8079/detailProduct` 路径，由于上述路径中的 `/detailProduct` 在 product 应用中匹配到的是 `/detail/*` 路径规则，根据规则内容，该服务属于核心应用做了单元会拆分，其会根据请求中 Header, Cookie 或请求参数中的变量具体的值去判断该请求的下游单元类型，由于事先配置如下切流规则（具体可见 rule 目录下的 idUnitMapping.json 文件内容）： +2. 归属于 unit 单元的核心应用服务调用演示。在浏览器中输入：`http://127.0.0.1:8079/detailProduct` 路径，由于上述路径中的 `/detailProduct` 在 product 应用中匹配到的是 `/detail/*` 路径规则，根据规则内容，该服务属于核心应用做了单元化拆分，其会根据请求中 Header, Cookie 或请求参数中的变量具体的值去判断该请求的下游单元类型，由于事先配置如下切流规则（具体可见 rule 目录下的 idUnitMapping.json 文件内容）： ``` { "itemType": "UnitRuleItem", @@ -171,7 +170,7 @@ ![](../../spring-cloud-alibaba-docs/src/main/asciidoc-zh/pic/image-2022-09-15-16-14-50-461.png) -3. 归属于中心（Center）单元的全局应用服务调用演示。在浏览器中输入：`http://127.0.0.1:8079/buyProduct` 路径，由于上述路径中的 `/buyProduct` 在 product 和 storage 应用中匹配到的是 `/buy/*` 路径规则，根据规则内容，该服务属于全局应用未做单元会拆分，其会直接将请求发送到下游的中心（Center）单元中全局应用实例。 +3. 归属于中心（Center）单元的全局应用服务调用演示。在浏览器中输入：`http://127.0.0.1:8875/buyProduct` 路径，由于上述路径中的 `/buyProduct` 在 product 和 storage 应用中匹配到的是 `/buy/*` 路径规则，根据规则内容，该服务属于全局应用未做单元会拆分，其会直接将请求发送到下游的中心（Center）单元中全局应用实例。 ![](../../spring-cloud-alibaba-docs/src/main/asciidoc-zh/pic/image-2022-09-15-16-14-02-388.png) @@ -179,7 +178,7 @@ - 构建新的映射关系规则和禁写规则（手动） - 将禁写规则推送给应用 - 等待数据追平后将新的映射关系规则推送给应用 - 接下来演示的切流规则，会将用户Id为 0 ~ 2999 的请求将发送给下游提供者中的一般（Unit）单元中的核心应用实例，用户Id为 3000 ~ 9999 的请求将发送给下游提供者中的中心（Center）单元中的全局应用实例。具体的规则详情见 idUnitMappingNext.json： + 接下来演示的切流规则，会将用户Id为 0 ~ 2999 的请求将发送给下游提供者中的一般（Unit）单元中的核心应用实例，用户Id为 3000 ~ 9999 的请求将发送给下游提供者中的中心（Center）单元中的全局应用实例。具体的规则详情见 idUnitMappingNext.json： ``` { "itemType": "UnitRuleItem", @@ -215,4 +214,3 @@ -