将 SpringCloud Finchley 升级到 RELEASE 时缺少 AmazonS3Client Bean
Missing AmazonS3Client Bean when upgrading SpringCloud Finchley to RELEASE
我最近将我的 SpringCloud 项目从 Brixton 升级到了 Finchley,一切正常。我当时正在处理 Finchley.SR2,没有遇到任何问题,但是每当我将项目升级到 Finchley.RELEASE(这是我所做的唯一更改)时,项目都无法启动。
原因是项目找不到AmazonS3Client
Bean:
...Unsatisfied dependency expressed through constructor parameter 0;
nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException:
No qualifying bean of type 'com.amazonaws.services.s3.AmazonS3Client' available:
expected at least 1 bean which qualifies as autowire candidate.
Dependency annotations: {}
这些是我之前的相关配置和classes:
build.gradle
buildscript {
ext {
springBootVersion = '2.0.2.RELEASE'
}
...
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
classpath('io.spring.gradle:dependency-management-plugin:1.0.5.RELEASE')
}
}
apply plugin: 'java'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:Finchley.SR2"
}
}
dependencies {
...
compile('org.springframework.boot:spring-boot-starter-web')
compile('org.springframework.cloud:spring-cloud-starter-aws')
compile('org.springframework.cloud:spring-cloud-starter-config'
...
}
...
S3Config.java(创建 AmazonS3/AmazonS3Client Bean 的 class)
...
@Configuration
public class S3Config {
@Bean
public AmazonS3 amazonS3() {
return AmazonS3ClientBuilder.standard()
.withCredentials(new DefaultAWSCredentialsProviderChain())
.build();
}
}
StorageService(找不到Bean的class)
...
@Service
public class StorageService {
private final AmazonS3Client amazonS3Client;
@Autowired
public StorageService(AmazonS3Client amazonS3Client) {
this.amazonS3Client = amazonS3Client;
}
...
}
这是我在升级到 Finchley.Release:
时对 build.gradle 文件所做的唯一更改
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:Finchley.RELEASE"
}
}
我已经尝试寻找任何丢失的库并调整我能找到的所有配置,但 none 似乎没有任何效果。
在与 Spring 维护者简短交谈后,a solution was found。
似乎我错了,我假设 AmazonS3
的 Bean 应该总是被发现为 AmazonS3Client
Bean,只是因为一个实现了另一个。它在以前的 Spring 版本上运行完全是运气。
创建 AmazonS3Client
的正确方法如下:
@Configuration
public class S3Config {
@Bean
public static AmazonS3Client amazonS3Client() {
return (AmazonS3Client) AmazonS3ClientBuilder.standard()
.withCredentials(new DefaultAWSCredentialsProviderChain())
.build();
}
}
我最近将我的 SpringCloud 项目从 Brixton 升级到了 Finchley,一切正常。我当时正在处理 Finchley.SR2,没有遇到任何问题,但是每当我将项目升级到 Finchley.RELEASE(这是我所做的唯一更改)时,项目都无法启动。
原因是项目找不到AmazonS3Client
Bean:
...Unsatisfied dependency expressed through constructor parameter 0;
nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException:
No qualifying bean of type 'com.amazonaws.services.s3.AmazonS3Client' available:
expected at least 1 bean which qualifies as autowire candidate.
Dependency annotations: {}
这些是我之前的相关配置和classes:
build.gradle
buildscript {
ext {
springBootVersion = '2.0.2.RELEASE'
}
...
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
classpath('io.spring.gradle:dependency-management-plugin:1.0.5.RELEASE')
}
}
apply plugin: 'java'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:Finchley.SR2"
}
}
dependencies {
...
compile('org.springframework.boot:spring-boot-starter-web')
compile('org.springframework.cloud:spring-cloud-starter-aws')
compile('org.springframework.cloud:spring-cloud-starter-config'
...
}
...
S3Config.java(创建 AmazonS3/AmazonS3Client Bean 的 class)
...
@Configuration
public class S3Config {
@Bean
public AmazonS3 amazonS3() {
return AmazonS3ClientBuilder.standard()
.withCredentials(new DefaultAWSCredentialsProviderChain())
.build();
}
}
StorageService(找不到Bean的class)
...
@Service
public class StorageService {
private final AmazonS3Client amazonS3Client;
@Autowired
public StorageService(AmazonS3Client amazonS3Client) {
this.amazonS3Client = amazonS3Client;
}
...
}
这是我在升级到 Finchley.Release:
时对 build.gradle 文件所做的唯一更改dependencyManagement {
imports {
mavenBom "org.springframework.cloud:spring-cloud-dependencies:Finchley.RELEASE"
}
}
我已经尝试寻找任何丢失的库并调整我能找到的所有配置,但 none 似乎没有任何效果。
在与 Spring 维护者简短交谈后,a solution was found。
似乎我错了,我假设 AmazonS3
的 Bean 应该总是被发现为 AmazonS3Client
Bean,只是因为一个实现了另一个。它在以前的 Spring 版本上运行完全是运气。
创建 AmazonS3Client
的正确方法如下:
@Configuration
public class S3Config {
@Bean
public static AmazonS3Client amazonS3Client() {
return (AmazonS3Client) AmazonS3ClientBuilder.standard()
.withCredentials(new DefaultAWSCredentialsProviderChain())
.build();
}
}