Spring、和AWS没有从队列中读取

Question

我试图用Spring和构建一个最小的gradle java项目，但是我无法让它从队列中读取。

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());
    }
}

application.yaml在src/main/resources中：

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

应用程序启动时抛出异常(但您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

但在日志中，我总是可以看到它确实从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 '***'

所以我不知道它为什么要找别的地方？

此外，它还抛出此异常(如果您处于日志调试模式，总是可见的)：

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

所以我不得不加上build.gradle

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

但是现在例外不再存在了，但是程序开始和结束时什么都不做，也不再打印日志了！

其他一些事实：

• Application.java在正确的包中，可以让组件扫描工作，所以Spring应该看到QueueListener类，
• application.yaml被正确读取，如果它抱怨一个放置错误的区域，
• 如果我输入了错误的凭证(错误的accessKey或/和错误的secretKey)，它不会抱怨，所以我认为它根本没有试图连接到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")

这可能是问题的一个症状，我希望所有所需的库都能被云启动器-aws自动加载。

我遗漏了什么？谢谢!

Answer 1

发现了这个问题，当然是愚蠢的事情。

Spring没有加载QueueListener类，因为它没有服务/组件注释，因此：

@Service
public class SqsQueueSender
{
...
}

解决了这个问题。