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PFSBucketAndObjectOperationSample.java
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PFSBucketAndObjectOperationSample.java
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/**
* Copyright 2019 Huawei Technologies Co.,Ltd.
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use
* this file except in compliance with the License. You may obtain a copy of the
* License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package samples_java;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.List;
import com.obs.services.ObsClient;
import com.obs.services.ObsConfiguration;
import com.obs.services.exception.ObsException;
import com.obs.services.internal.utils.ServiceUtils;
import com.obs.services.model.AccessControlList;
import com.obs.services.model.BucketMetadataInfoRequest;
import com.obs.services.model.BucketMetadataInfoResult;
import com.obs.services.model.BucketTypeEnum;
import com.obs.services.model.CreateBucketRequest;
import com.obs.services.model.ListBucketsRequest;
import com.obs.services.model.ObjectMetadata;
import com.obs.services.model.ObsBucket;
import com.obs.services.model.ObsObject;
/**
* This sample demonstrates how to do object-related operations
* (such as create/delete/get/copy object, do object ACL/OPTIONS)
* on OBS using the OBS SDK for Java.
*/
public class PFSBucketAndObjectOperationSample
{
private static final String endPoint = "https://your-endpoint";
private static final String ak = "*** Provide your Access Key ***";
private static final String sk = "*** Provide your Secret Key ***";
private static ObsClient obsClient;
private static String bucketName = "my-obs-bucket-demo";
private static String objectKey = "my-obs-object-key-demo";
private static String newObjectKey = "new-my-obs-object-key-demo";
private static long newLength = 1024L;
public static void main(String[] args)
throws IOException
{
ObsConfiguration config = new ObsConfiguration();
config.setSocketTimeout(30000);
config.setConnectionTimeout(10000);
config.setEndPoint(endPoint);
try
{
/*
* Constructs a obs client instance with your account for accessing OBS
*/
obsClient = new ObsClient(ak, sk, config);
/*
* Create PFS bucket
*/
CreateBucketRequest request = new CreateBucketRequest();
request.setBucketName(bucketName);
request.setBucketType(BucketTypeEnum.PFS);
obsClient.createBucket(request);
/*
* Head PFS bucket
*/
BucketMetadataInfoRequest bucketMetadataInfoRequest = new BucketMetadataInfoRequest();
bucketMetadataInfoRequest.setBucketName(bucketName);
BucketMetadataInfoResult bucketMetadataInfoResult = obsClient.getBucketMetadata(bucketMetadataInfoRequest);
System.out.println(bucketMetadataInfoResult);
/*
* List buckets
*/
doListBucketOperations();
/*
* Create object
*/
String content = "Hello OBS";
obsClient.putObject(bucketName, objectKey, new ByteArrayInputStream(content.getBytes("UTF-8")), null);
System.out.println("Create object:" + objectKey + " successfully!\n");
/*
* Get object metadata
*/
System.out.println("Getting object metadata");
ObjectMetadata metadata = obsClient.getObjectMetadata(bucketName, objectKey, null);
System.out.println("\t" + metadata);
/*
* Get object
*/
System.out.println("Getting object content");
ObsObject obsObject = obsClient.getObject(bucketName, objectKey, null);
System.out.println("\tobject content:" + ServiceUtils.toString(obsObject.getObjectContent()));
/*
* Copy object
*/
String sourceBucketName = bucketName;
String destBucketName = bucketName;
String sourceObjectKey = objectKey;
String destObjectKey = objectKey + "-back";
System.out.println("Copying object\n");
obsClient.copyObject(sourceBucketName, sourceObjectKey, destBucketName, destObjectKey);
/*
* Put/Get object acl operations
*/
doObjectAclOperations();
/*
* Modify object operations
*/
doModifyFileOperations();
/*
* Rename object operations
*/
doRenameFileOperations();
/*
* Truncate object operations
*/
doTruncateFileOperations();
/*
* Get object metadata
*/
System.out.println("Getting object metadata");
metadata = obsClient.getObjectMetadata(bucketName, objectKey, null);
System.out.println("\t" + metadata);
/*
* Delete object
*/
System.out.println("Deleting objects\n");
obsClient.deleteObject(bucketName, objectKey, null);
obsClient.deleteObject(bucketName, destObjectKey, null);
}
catch (ObsException e)
{
System.out.println("Response Code: " + e.getResponseCode());
System.out.println("Error Message: " + e.getErrorMessage());
System.out.println("Error Code: " + e.getErrorCode());
System.out.println("Request ID: " + e.getErrorRequestId());
System.out.println("Host ID: " + e.getErrorHostId());
}
finally
{
if (obsClient != null)
{
try
{
/*
* Close obs client
*/
obsClient.close();
}
catch (IOException e)
{
}
}
}
}
private static void doListBucketOperations() {
/*
* Create OBJCET bucket
*/
obsClient.createBucket(bucketName + "-object");
/*
* List all buckets
*/
ListBucketsRequest request = new ListBucketsRequest();
List<ObsBucket> allBuckets = obsClient.listBuckets(request);
System.out.println("----------allBuckets----------\n");
for (int i = 0; i < allBuckets.size(); i++) {
System.out.println(allBuckets.get(i));
}
/*
* List OBJECT buckets
*/
request.setBucketType(BucketTypeEnum.OBJECT);
List<ObsBucket> objectBuckets = obsClient.listBuckets(request);
System.out.println("-----------objectBuckets---------\n");
for (int i = 0; i < objectBuckets.size(); i++) {
System.out.println(objectBuckets.get(i));
}
/*
* List PFS buckets
*/
request.setBucketType(BucketTypeEnum.PFS);
List<ObsBucket> PFSBuckets = obsClient.listBuckets(request);
System.out.println("-----------PFSBuckets---------\n");
for (int i = 0; i < PFSBuckets.size(); i++) {
System.out.println(PFSBuckets.get(i));
}
}
private static void doObjectAclOperations()
throws ObsException
{
System.out.println("Setting object ACL to public-read \n");
obsClient.setObjectAcl(bucketName, objectKey, AccessControlList.REST_CANNED_PUBLIC_READ);
System.out.println("Getting object ACL " + obsClient.getObjectAcl(bucketName, objectKey) + "\n");
System.out.println("Setting object ACL to private \n");
obsClient.setObjectAcl(bucketName, objectKey, AccessControlList.REST_CANNED_PRIVATE);
System.out.println("Getting object ACL " + obsClient.getObjectAcl(bucketName, objectKey) + "\n");
}
private static void doRenameFileOperations() throws ObsException
{
System.out.println("rename " + objectKey + " to " + newObjectKey + "\n");
obsClient.renameObject(bucketName, objectKey, newObjectKey);
System.out.println("rename " + newObjectKey + " to " + objectKey + "\n");
obsClient.renameObject(bucketName, newObjectKey, objectKey);
}
private static void doTruncateFileOperations() throws ObsException
{
System.out.println("truncate " + objectKey + " length to " + newLength + "\n");
obsClient.truncateObject(bucketName, objectKey, newLength);
}
private static void doModifyFileOperations() throws ObsException, IOException
{
System.out.println("modify " + objectKey + " position 0\n");
String content = "Hello obs";
obsClient.modifyObject(bucketName, objectKey, 0, new ByteArrayInputStream(content.getBytes("UTF-8")));
ObsObject obsObject = obsClient.getObject(bucketName, objectKey, null);
System.out.println("\tobject content:" + ServiceUtils.toString(obsObject.getObjectContent()));
obsClient.modifyObject(bucketName, objectKey, 9, new ByteArrayInputStream(content.getBytes("UTF-8")));
obsObject = obsClient.getObject(bucketName, objectKey, null);
System.out.println("\tobject content:" + ServiceUtils.toString(obsObject.getObjectContent()));
}
}