OSS提供標準、低頻訪問、歸檔、冷歸檔和深度冷歸檔多種存儲類型,全面覆蓋從熱到冷的各種數據存儲場景。本文主要介紹如何轉換文件(Object)的存儲類型。
注意事項
本文以華東1(杭州)外網Endpoint為例。如果您希望通過與OSS同地域的其他阿里云產品訪問OSS,請使用內網Endpoint。關于OSS支持的Region與Endpoint的對應關系,請參見OSS訪問域名、數據中心、開放端口。
本文以從環境變量讀取訪問憑證為例。如何配置訪問憑證,請參見Java配置訪問憑證。
本文以OSS域名新建OSSClient為例。如果您希望通過自定義域名、STS等方式新建OSSClient,請參見新建OSSClient。
要轉換文件存儲類型,您必須具有
oss:GetObject
、oss:PutObject
和oss:RestoreObject
權限。具體操作,請參見為RAM用戶授權自定義的權限策略。
示例代碼
重要
當低頻訪問、歸檔、冷歸檔或者深度冷歸檔存儲類型Object在存儲不足規定時長時轉換了存儲類型或者提前刪除時,需要收取不足規定時長容量費用。更多信息,請參見Object在存儲不足規定時長時如何計費?。
將標準或低頻訪問轉換為歸檔、冷歸檔或者深度冷歸檔類型
以下代碼用于將Object的存儲類型從標準或低頻訪問轉換為歸檔、冷歸檔或者深度冷歸檔類型。
import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.CopyObjectRequest;
import com.aliyun.oss.model.CopyObjectResult;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.StorageClass;
public class Demo {
public static void main(String[] args) throws Exception {
// Endpoint以華東1(杭州)為例,其它Region請按實際情況填寫。
String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// 從環境變量中獲取訪問憑證。運行本代碼示例之前,請確保已設置環境變量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
// 本示例中的Bucket與Object需提前創建好, 且Object類型為標準或低頻訪問存儲類型。
// 填寫Bucket名稱,例如examplebucket。
String bucketName = "examplebucket";
// 填寫不包含Bucket名稱在內的Object完整路徑,例如exampleobject.txt。
String objectName = "exampleobject.txt";
// 填寫Bucket所在地域。以華東1(杭州)為例,Region填寫為cn-hangzhou。
String region = "cn-hangzhou";
// 創建OSSClient實例。
ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
OSS ossClient = OSSClientBuilder.create()
.endpoint(endpoint)
.credentialsProvider(credentialsProvider)
.clientConfiguration(clientBuilderConfiguration)
.region(region)
.build();
try {
// 創建CopyObjectRequest對象。
CopyObjectRequest request = new CopyObjectRequest(bucketName, objectName, bucketName, objectName) ;
// 創建ObjectMetadata對象。
ObjectMetadata objectMetadata = new ObjectMetadata();
// 將Object存儲類型轉換為歸檔類型。
objectMetadata.setHeader("x-oss-storage-class", StorageClass.Archive);
// 將Object存儲類型轉換為冷歸檔類型。
// objectMetadata.setHeader("x-oss-storage-class", StorageClass.ColdArchive);
// 將Object存儲類型轉換為深度冷歸檔類型。
// objectMetadata.setHeader("x-oss-storage-class", StorageClass.DeepColdArchive);
request.setNewObjectMetadata(objectMetadata);
// 更改文件存儲類型。
CopyObjectResult result = ossClient.copyObject(request);
} catch (OSSException oe) {
System.out.println("Caught an OSSException, which means your request made it to OSS, "
+ "but was rejected with an error response for some reason.");
System.out.println("Error Message:" + oe.getErrorMessage());
System.out.println("Error Code:" + oe.getErrorCode());
System.out.println("Request ID:" + oe.getRequestId());
System.out.println("Host ID:" + oe.getHostId());
} catch (ClientException ce) {
System.out.println("Caught an ClientException, which means the client encountered "
+ "a serious internal problem while trying to communicate with OSS, "
+ "such as not being able to access the network.");
System.out.println("Error Message:" + ce.getMessage());
} finally {
if (ossClient != null) {
ossClient.shutdown();
}
}
}
}
將歸檔類型轉換為標準或低頻訪問類型
以下代碼用于將Object的存儲類型從歸檔轉換為標準或低頻訪問類型。
package com.aliyun.oss.demo;
import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.CopyObjectRequest;
import com.aliyun.oss.model.CopyObjectResult;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.StorageClass;
public class Demo {
public static void main(String[] args) throws Exception {
// Endpoint以華東1(杭州)為例,其它Region請按實際情況填寫。
String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
// 從環境變量中獲取訪問憑證。運行本代碼示例之前,請確保已設置環境變量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
// 本示例中的Bucket與Object需提前創建好, 且Object類型為歸檔存儲類型。
// 填寫Bucket名稱,例如examplebucket。
String bucketName = "examplebucket";
// 填寫不包含Bucket名稱在內的Object完整路徑,例如exampleobject.txt。
String objectName = "exampleobject.txt";
// 填寫Bucket所在地域。以華東1(杭州)為例,Region填寫為cn-hangzhou。
String region = "cn-hangzhou";
// 創建OSSClient實例。
ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);
OSS ossClient = OSSClientBuilder.create()
.endpoint(endpoint)
.credentialsProvider(credentialsProvider)
.clientConfiguration(clientBuilderConfiguration)
.region(region)
.build();
try {
// 獲取文件元數據。
ObjectMetadata objectMetadata = ossClient.getObjectMetadata(bucketName, objectName);
// 檢查目標文件是否為歸檔類型。如果是,則需要先解凍才能更改存儲類型。
StorageClass storageClass = objectMetadata.getObjectStorageClass();
System.out.println("storage type:" + storageClass);
if (storageClass == StorageClass.Archive) {
// 解凍文件。
ossClient.restoreObject(bucketName, objectName);
// 等待解凍完成。
do {
Thread.sleep(1000);
objectMetadata = ossClient.getObjectMetadata(bucketName, objectName);
} while (!objectMetadata.isRestoreCompleted());
}
// 創建CopyObjectRequest對象。
CopyObjectRequest request = new CopyObjectRequest(bucketName, objectName, bucketName, objectName) ;
// 創建ObjectMetadata對象。
objectMetadata = new ObjectMetadata();
// 將Object存儲類型轉換為低頻訪問類型。
objectMetadata.setHeader("x-oss-storage-class", StorageClass.IA);
// 將Object存儲類型轉換為標準存儲類型。
// objectMetadata.setHeader("x-oss-storage-class", StorageClass.Standard);
request.setNewObjectMetadata(objectMetadata);
// 更改文件存儲類型。
CopyObjectResult result = ossClient.copyObject(request);
} catch (OSSException oe) {
System.out.println("Caught an OSSException, which means your request made it to OSS, "
+ "but was rejected with an error response for some reason.");
System.out.println("Error Message:" + oe.getErrorMessage());
System.out.println("Error Code:" + oe.getErrorCode());
System.out.println("Request ID:" + oe.getRequestId());
System.out.println("Host ID:" + oe.getHostId());
} catch (ClientException ce) {
System.out.println("Caught an ClientException, which means the client encountered "
+ "a serious internal problem while trying to communicate with OSS, "
+ "such as not being able to access the network.");
System.out.println("Error Message:" + ce.getMessage());
} finally {
if (ossClient != null) {
ossClient.shutdown();
}
}
}
}
相關文檔
關于轉換文件存儲類型的完整示例代碼,請參見GitHub示例。
關于轉換文件存儲類型的API接口說明,請參見CopyObject。
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