不从父级继承的 Spring Cloud 配置云

Posted 2023-02-27

【中文标题】不从父级继承的 Spring Cloud 配置云

【英文标题】：Spring cloud config cloud without inheriting from parent

【发布时间】：2019-05-20 10:58:03

【问题描述】：

我从 spring cloud config 开始，并以文档中的这个简单示例为基础：http://cloud.spring.io/spring-cloud-config/single/spring-cloud-config.html#_client_side_usage

当我用作独立的 maven 项目时，我的服务器和客户端一样工作正常

但是我正在一个多模块 maven 项目中工作，我的根父模块从 Spring Boot 继承：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

所以我的子模块（例如 spring 配置服务器，以及不同的客户端）继承自我的父模块，并且每个模块都声明了所需的 spring boot/cloud 依赖项。

问题来了，当我从父级继承时，客户端配置服务无法再获取配置。下面是关于spring cloud config的解释：

To use these features in an application, you can build it as a Spring Boot application that depends on spring-cloud-config-client (for an example, see the test cases for the config-client or the sample application). The most convenient way to add the dependency is with a Spring Boot starter org.springframework.cloud:spring-cloud-starter-config. There is also a parent pom and BOM (spring-cloud-starter-parent) for Maven users and a Spring IO version management properties file for Gradle and Spring CLI users

所以我的问题是我如何仍然可以将多 Maven 模块与我的 Spring 客户端配置服务一起使用？不直接从 spring-boot-starter-parent 继承？

这里我的父服务减少了这个例子：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <groupId>com.nicolas</groupId>
  <artifactId>micro-services</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>micro-services</name>
  <packaging>pom</packaging>

  <properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Finchley.M8</spring-cloud.version>
  </properties>

  <modules>
    <module>produtos</module>
    <module>configserver</module>
  </modules>

  <dependencies>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-config-server</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <scope>runtime</scope>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version> $spring-cloud.version</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

  <repositories>
    <repository>
      <id>spring-snapshots</id>
      <name>Spring Snapshots</name>
      <url>https://repo.spring.io/snapshot</url>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
    </repository>
    <repository>
      <id>spring-milestones</id>
      <name>Spring Milestones</name>
      <url>https://repo.spring.io/milestone</url>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>

  <pluginRepositories>
    <pluginRepository>
      <id>spring-snapshots</id>
      <name>Spring Snapshots</name>
      <url>https://repo.spring.io/snapshot</url>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
    </pluginRepository>
    <pluginRepository>
      <id>spring-milestones</id>
      <name>Spring Milestones</name>
      <url>https://repo.spring.io/milestone</url>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </pluginRepository>
  </pluginRepositories>

</project>

以及我希望如何在儿童服务中使用：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>com.nicolas</groupId>
    <artifactId>micro-services</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <relativePath>../pom.xml</relativePath>
  </parent>

  <artifactId>produtos</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>produtos</name>
  <description>Produtos</description>
  <packaging>jar</packaging>

  <dependencies>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-config-client</artifactId>
    </dependency>
  </dependencies>

</project>

当然我改了上面，再次声明所有的依赖和仓库，继承自spring boot parent，就可以了：

2018-12-19 19:14:41.169  INFO 17000 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at: http://localhost:8888

但我认为我不应该再次重新声明所有依赖项，如果有人遇到过这种情况，请告诉我。谢谢。

【参考方案1】：

来自documentation：

您仍然需要父项中的 spring cloud 依赖项管理部分以及下面的启动项。

<dependencyManagement>
        <dependencies>
        <dependency>
            <!-- Import dependency management from Spring Boot -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>2.1.1.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>