Spring Boot、Spring Cloud AWS 和 AWS SQS 未从队列中读取

Question

我正在尝试使用 Spring Boot 和 Spring Cloud AWS SQS 构建一个最小的 gradle java 项目，但我无法从队列中读取它。

这些是我的项目文件：

build.gradle：

apply plugin: "java"
apply plugin: "eclipse"
apply plugin: "spring-boot"
apply plugin: "io.spring.dependency-management"

sourceCompatibility = 1.8
targetCompatibility = 1.8

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.3.5.RELEASE")
        classpath("io.spring.gradle:dependency-management-plugin:0.5.2.RELEASE")
    }
}

dependencyManagement {
     imports {
          mavenBom("org.springframework.cloud:spring-cloud-aws:1.1.0.RELEASE")
     }
}

repositories {
    mavenCentral()
}

dependencies {
    compile("org.springframework.boot:spring-boot-starter-actuator:1.3.5.RELEASE")
    compile("org.springframework.cloud:spring-cloud-starter-aws:1.1.0.RELEASE")
    // if I don't add the line below, the annotation @MessageMapping is not found :(
    // I would have expected that cloud-starter-aws would have taken care of it
    compile("org.springframework.cloud:spring-cloud-aws-messaging:1.1.0.RELEASE")
    // this has been added to fix an exception happening, please read below
    compile("org.springframework.data:spring-data-commons:1.12.1.RELEASE")
}

Application.java：

package com.test;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application
{    
    public static void main(String[] args)
    {
        SpringApplication.run(Application.class, args);
    }
}

QueueListener.java：

package com.test.sqs;

import java.util.logging.Logger;
import org.springframework.messaging.handler.annotation.MessageMapping;
import com.test.sqs.model.TestMessage;

public class QueueListener
{
    @MessageMapping("test_queue")
    private void receiveMessage(TestMessage testMessage)
    {
        System.out.println("Test message received: " + testMessage.getMessage());
    }
}

src/main/resources 中的application.yaml：

cloud:
    aws:
        credentials:
            accessKey: **********************
            secretKey: **********************
        region:
            static: us-west-2

应用程序在启动时抛出异常（但你可以在日志调试模式下看到异常！）：

org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.amazonaws.auth.profile.ProfilesConfigFile]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: AWS credential profiles file not found in the given path: C:\src\collector\default

但总是在日志中我可以看到它确实从 yaml 文件中获取了我的凭据：

2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.accessKey' in [systemProperties]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.accessKey' in [systemEnvironment]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.accessKey' in [random]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.accessKey' in [applicationConfigurationProperties]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Found key 'cloud.aws.credentials.accessKey' in [applicationConfigurationProperties] with type [String] and value '***'
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.secretKey' in [systemProperties]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.secretKey' in [systemEnvironment]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.secretKey' in [random]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Searching for key 'cloud.aws.credentials.secretKey' in [applicationConfigurationProperties]
2016-05-19 11:15:14.546 DEBUG 11704 --- [           main] o.s.c.e.PropertySourcesPropertyResolver  : Found key 'cloud.aws.credentials.secretKey' in [applicationConfigurationProperties] with type [String] and value '***'

所以我不确定它为什么会寻找其他地方？

它还会抛出此异常（只有在您处于日志记录调试模式时才始终可见）：

    java.lang.ClassNotFoundException: org.springframework.data.web.config.EnableSpringDataWebSupport

所以我不得不在 build.gradle 中添加

compile("org.springframework.data:spring-data-commons:1.12.1.RELEASE")

但是现在异常已经不存在了，但是程序开始和结束时什么都不做，并且不再打印日志了！

其他一些事实：

• Application.java 在正确的包中让组件扫描工作，所以 Spring 应该看到 QueueListener 类，
• application.yaml 被正确读取，如果放置了错误的区域，它会抱怨，
• 如果我输入了错误的凭据（错误的 accessKey 或/和错误的 secretKey），它不会抱怨，所以我认为它根本不会尝试连接到 AWS。

我不确定 build.gradle 的第 34 行是否：

compile("org.springframework.cloud:spring-cloud-starter-aws:1.1.0.RELEASE")
// if I don't add the line below, the annotation @MessageMapping is not found :(
// I would have expected that cloud-starter-aws would have taken care of it
compile("org.springframework.cloud:spring-cloud-aws-messaging:1.1.0.RELEASE")
// this has been added to fix an exception happening, please read below
compile("org.springframework.data:spring-data-commons:1.12.1.RELEASE")

可能是问题的征兆，我希望 cloud-starter-aws 自动加载所有需要的库。

我错过了什么？谢谢！

Answer 1

发现了问题，这当然是愚蠢的。

Spring 没有加载 QueueListener 类，因为它没有 Service / Component 注解，所以：

@Service
public class SqsQueueSender
{
...
}

修复了问题。