[英]Spring Cloud DataFlow using launch task after new file in AWS S3 Bucket source
[英]Spring Cloud AWS code not finding S3 File
我不明白為什么Spring AWS Cloud代碼沒有找到我的S3文件。 我的spring bean xml配置中有'aws-context:context-resource-loader'。 我本以為's3:'資源的使用就像春天一樣無縫'classpath:'資源很容易使用。
我知道AWS權限和憑據配置正確,因為如果我直接使用AmazonS3Client,我可以檢索有問題的文件。
從Spring 端開始 ,應自動找到AWS憑據。
這是有效的Amazon S3客戶端代碼:
public static void main(String [] args) throws IOException {
AmazonS3 s3Client = new AmazonS3Client(new DefaultAWSCredentialsProviderChain());
System.out.println(s3Client.doesObjectExist("MyBucket", "sample/resource.txt"));
S3Object object = s3Client.getObject(new GetObjectRequest("MyBucket", "sample/resource.txt"));
String result = StreamUtils.copyToString(object.getObjectContent(), Charset.forName("UTF-8"));
System.out.println(result);
}
以下是未找到相同S3文件的Spring Cloud AWS等效項:
public class App {
public static void main(String[] args) throws IOException {
final AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext("app-context.xml");
ctx.scan("bdf.sample.spring");
S3Resource s3Resource = ctx.getBean("S3Resource", S3Resource.class);
InputStream resource = s3Resource.getResource("s3://MyBucket/sample/resource.txt");
String result = StreamUtils.copyToString(resource, Charset.forName("UTF-8"));
System.out.println(result);
}
}
我在S3Resource構造函數中有一個顯示此ResourceLoader的System.out.println:
org.springframework.context.annotation.AnnotationConfigApplicationContext
我得到的例外是:
線程“main”java.io.FileNotFoundException中的異常:無法打開類路徑資源[s3://MyBucket/sample/resource.txt],因為它不存在
S3Resource:
package bdf.sample.spring;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.stereotype.Service;
import java.io.IOException;
import java.io.InputStream;
@Service("S3Resource")
public class S3Resource {
private final ResourceLoader resourceLoader;
@Autowired
public S3Resource(ResourceLoader resourceLoader) {
this.resourceLoader = resourceLoader;
System.out.println(resourceLoader.getClass());
}
public InputStream getResource(String path) throws IOException {
final Resource resource = resourceLoader.getResource(path);
return resource.getInputStream();
}
}
最后是我的Spring XML
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aws-context="http://www.springframework.org/schema/cloud/aws/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/cloud/aws/context
http://www.springframework.org/schema/cloud/spring-cloud-aws-context.xsd">
<aws-context:context-resource-loader/>
<aws-context:context-region region="us-east-1"/>
</beans>
github鏈接與實際上相同的代碼: https : //github.com/BDF/SpringCloudSample
一個問題是ResoureLoader對S3的支持不是讀取region屬性。
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