Add config preference example
Freeman Lau
3 years ago
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<groupId>com.alibaba.cloud</groupId>
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<artifactId>spring-cloud-alibaba-examples</artifactId>
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<version>${revision}</version>
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<relativePath>../../pom.xml</relativePath>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>nacos-config-preference-example</artifactId>
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<name>Spring Cloud Starter Alibaba Nacos Config Preference Example</name>
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<description>Example demonstrating how to use nacos config preference in spring boot</description>
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<packaging>jar</packaging>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>com.alibaba.cloud</groupId>
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<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-configuration-processor</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-deploy-plugin</artifactId>
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<version>${maven-deploy-plugin.version}</version>
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<configuration>
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<skip>true</skip>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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# Nacos Config Preference
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## 项目说明
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本项目演示如何使用配置偏好配置
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## 示例
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1. 启动一个 Nacos server
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添加配置 `test.yml`
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```yaml
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configdata:
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user:
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name: freeman
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```
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2. 设置配置偏好 `spring.cloud.nacos.config.preference=remote`
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3. 访问 `localhost`
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应该能看到值为 `freeman`，因为优先使用了配置中心配置
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修改配置为 `spring.cloud.nacos.config.preference=local` 那么值应该为 `aa`
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# Nacos Config Preference
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## Project instruction
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This project demonstrates how to use config preferences.
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## Example
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1. Start a Nacos server
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add configuration `test.yml`
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```yaml
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configdata:
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user:
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name: freeman
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```
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2. Set config preference `spring.cloud.nacos.config.preference=remote`
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3. access `localhost`
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You should see a value of `freeman`, because the configuration center configuration is used first.
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Modify the configuration to `spring.cloud.nacos.config.preference=local` then the value should be `aa`.
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/*
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* Copyright 2013-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.alibaba.cloud.configpreference.examples;
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import com.alibaba.cloud.configpreference.examples.model.UserProperties;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.boot.context.properties.EnableConfigurationProperties;
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/**
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* @author freeman
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*/
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@SpringBootApplication
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@EnableConfigurationProperties(UserProperties.class)
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public class ConfigPreferenceApplication {
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public static void main(String[] args) {
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SpringApplication.run(ConfigPreferenceApplication.class, args);
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}
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}
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/*
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* Copyright 2013-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.alibaba.cloud.configpreference.examples.controller;
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import com.alibaba.cloud.configpreference.examples.model.UserProperties;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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/**
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*
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*
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* @author freeman
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*/
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@RestController
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public class UserController {
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@Autowired
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private UserProperties userProperties;
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@GetMapping
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public String getName() {
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return userProperties.getName();
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}
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}
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/*
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* Copyright 2013-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.alibaba.cloud.configpreference.examples.model;
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import java.util.List;
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import java.util.Map;
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import lombok.Data;
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import org.springframework.boot.context.properties.ConfigurationProperties;
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/**
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*
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*
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* @author freeman
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*/
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@Data
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@ConfigurationProperties(prefix = "configdata.user")
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public class UserProperties {
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private String name;
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private Integer age;
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private Map<String, Object> map;
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private List<User> users;
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@Data
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public static class User {
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private String name;
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private Integer age;
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}
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}
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configdata:
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user:
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name: aa
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server:
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port: 80
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spring:
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application:
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name: nacos-config-import-example
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cloud:
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nacos:
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config:
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group: DEFAULT_GROUP
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server-addr: 127.0.0.1:8848
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preference: remote
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config:
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import:
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- optional:nacos:test.yml
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profiles:
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active: dev
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---
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spring:
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config:
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activate:
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on-profile: dev
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configdata:
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user:
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name: bb
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