使用 S3 出站网关将元数据数据添加到 S3 对象

Adding metadata data to S3 object using S3 outbound gateway

已为 spring 集成 aws 应用程序编写代码,该应用程序当前使用 s3-outbound-gateway 将文件从源文件夹上传到目标 S3 存储桶。想要在 S3 存储桶中上传文件时添加以下用户定义的元数据及其有关文件的值。

x-amz-meta-sourcePath : /test

x-amz-meta-targetPath :/targetbucket/

x-amz-meta-timestamp:(#timestamp 值)

想知道如何使用 S3 出站网关或其他方式添加元数据。任何 documentation/example/suggestion 都将有助于实现这一目标。

<util:map id="userMetadata" value-type="java.lang.String">
            <entry key="x-amz-meta-source" value="testsource" />
            <entry key="x-amz-meta-sourcePath" value="testpath" />    
            <entry key="x-amz-meta-targetPath" value="headers.TARGET_PATH" />               </util:map>

        <bean id="objectMetadata"  class="com.amazonaws.services.s3.model.ObjectMetadata">
        <property name="userMetadata" ref="userMetadata"/>
        </bean>

        <bean id="uploadMetadataProvider"  class="org.springframework.integration.aws.outbound.S3MessageHandler$UploadMetadataProvider">
        <property name="objectMetadata" ref="objectMetadata"/>
        </bean>
<int-aws:s3-outbound-gateway id="s3File"
        request-channel="filesS3GateWay"
        reply-channel="filesS3ChainChannel"
        transfer-manager="transferManager"
        bucket-expression = "headers.TARGET_PATH"
        key-expression="headers.file_name"
        upload-metadata-provider="uploadMetadataProvider"
        command="UPLOAD">
        <int-aws:request-handler-advice-chain>
            <ref bean="retryAdvice" />
        </int-aws:request-handler-advice-chain>
    </int-aws:s3-outbound-gateway>

我想你需要的是这个:

    <xsd:attribute name="upload-metadata-provider">
        <xsd:annotation>
            <xsd:documentation>
                Reference to an instance of
                'org.springframework.integration.aws.outbound.S3MessageHandler$UploadMetadataProvider'.
            </xsd:documentation>
            <xsd:appinfo>
                <tool:annotation kind="ref">
                    <tool:expected-type
                            type="org.springframework.integration.aws.outbound.S3MessageHandler$UploadMetadataProvider"/>
                </tool:annotation>
            </xsd:appinfo>
        </xsd:annotation>
    </xsd:attribute>

所以,你注入这样一个 UploadMetadataProvider:

/**
 * The callback to populate an {@link ObjectMetadata} for upload operation.
 * The message can be used as a metadata source.
 */
public interface UploadMetadataProvider {

    void populateMetadata(ObjectMetadata metadata, Message<?> message);

}

然后根据请求消息将您需要的任何内容填充到 ObjectMetadata 中。