Update the object storage class

  namespace 
  
 gcs 
  
 = 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 storage 
 ; 
 using 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 StatusOr 
 ; 
 []( 
 gcs 
 :: 
 Client 
  
 client 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 bucket_name 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 object_name 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 storage_class 
 ) 
  
 { 
  
 StatusOr<gcs 
 :: 
 ObjectMetadata 
>  
 object_metadata 
  
 = 
  
 client 
 . 
 RewriteObjectBlocking 
 ( 
  
 bucket_name 
 , 
  
 object_name 
 , 
  
 bucket_name 
 , 
  
 object_name 
 , 
  
 gcs 
 :: 
 WithObjectMetadata 
 ( 
  
 gcs 
 :: 
 ObjectMetadata 
 (). 
 set_storage_class 
 ( 
 storage_class 
 ))); 
  
 if 
  
 ( 
 ! 
 object_metadata 
 ) 
  
 throw 
  
 std 
 :: 
 move 
 ( 
 object_metadata 
 ). 
 status 
 (); 
  
 std 
 :: 
 cout 
 << 
 "Changed storage class of object " 
 << 
 object_metadata 
 - 
> name 
 () 
 << 
 " in bucket " 
 << 
 object_metadata 
 - 
> bucket 
 () 
 << 
 " to " 
 << 
 object_metadata 
 - 
> storage_class 
 () 
 << 
 " 
 \n 
 " 
 ; 
 } 
 

  using 
  
  Google.Cloud.Storage.V1 
 
 ; 
 using 
  
 System 
 ; 
 public 
  
 class 
  
 ChangeFileStorageClassSample 
 { 
  
 public 
  
 Google 
 . 
 Apis 
 . 
 Storage 
 . 
 v1 
 . 
 Data 
 . 
 Object 
  
 ChangeFileStorageClass 
 ( 
  
 string 
  
 bucketName 
  
 = 
  
 "your-bucket-name" 
 , 
  
 string 
  
 objectName 
  
 = 
  
 "your-object-name" 
 , 
  
 string 
  
 storageClass 
  
 = 
  
  StorageClasses 
 
 . 
  Standard 
 
 ) 
  
 { 
  
 var 
  
 storage 
  
 = 
  
  StorageClient 
 
 . 
  Create 
 
 (); 
  
 // Changing storage class requires a rewrite operation, which can only be done 
  
 // by the underlying service 
  
 var 
  
 obj 
  
 = 
  
 new 
  
 Google 
 . 
 Apis 
 . 
 Storage 
 . 
 v1 
 . 
 Data 
 . 
 Object 
  
 { 
  
 StorageClass 
  
 = 
  
 storageClass 
  
 }; 
  
 storage 
 . 
 Service 
 . 
 Objects 
 . 
 Rewrite 
 ( 
 obj 
 , 
  
 bucketName 
 , 
  
 objectName 
 , 
  
 bucketName 
 , 
  
 objectName 
 ). 
 Execute 
 (); 
  
 var 
  
 file 
  
 = 
  
 storage 
 . 
 GetObject 
 ( 
 bucketName 
 , 
  
 objectName 
 ); 
  
 Console 
 . 
 WriteLine 
 ( 
 $"Object {objectName} in bucket {bucketName} had" 
  
 + 
  
 $" its storage class set to {storageClass}." 
 ); 
  
 return 
  
 file 
 ; 
  
 } 
 } 
 

  import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "time" 
  
 "cloud.google.com/go/storage" 
 ) 
 // changeObjectStorageClass changes the storage class of a single object. 
 func 
  
 changeObjectStorageClass 
 ( 
 w 
  
 io 
 . 
  Writer 
 
 , 
  
 bucket 
 , 
  
 object 
  
 string 
 ) 
  
 error 
  
 { 
  
 // bucket := "bucket-name" 
  
 // object := "object-name" 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 storage 
 . 
 NewClient 
 ( 
 ctx 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "storage.NewClient: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 defer 
  
 client 
 . 
 Close 
 () 
  
 ctx 
 , 
  
 cancel 
  
 := 
  
 context 
 . 
 WithTimeout 
 ( 
 ctx 
 , 
  
 time 
 . 
 Second 
 * 
 10 
 ) 
  
 defer 
  
 cancel 
 () 
  
 o 
  
 := 
  
 client 
 . 
  Bucket 
 
 ( 
 bucket 
 ). 
  Object 
 
 ( 
 object 
 ) 
  
 // Optional: set a generation-match precondition to avoid potential race 
  
 // conditions and data corruptions. The request to copy is aborted if the 
  
 // object's generation number does not match your precondition. 
  
 attrs 
 , 
  
 err 
  
 := 
  
 o 
 . 
 Attrs 
 ( 
 ctx 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "object.Attrs: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 o 
  
 = 
  
 o 
 . 
 If 
 ( 
 storage 
 . 
  Conditions 
 
 { 
 GenerationMatch 
 : 
  
 attrs 
 . 
  Generation 
 
 }) 
  
 // See the StorageClass documentation for other valid storage classes: 
  
 // https://cloud.google.com/storage/docs/storage-classes 
  
 newStorageClass 
  
 := 
  
 "COLDLINE" 
  
 // You can't change an object's storage class directly, the only way is 
  
 // to rewrite the object with the desired storage class. 
  
 copier 
  
 := 
  
 o 
 . 
  CopierFrom 
 
 ( 
 o 
 ) 
  
 copier 
 . 
 StorageClass 
  
 = 
  
 newStorageClass 
  
 if 
  
 _ 
 , 
  
 err 
  
 := 
  
 copier 
 . 
 Run 
 ( 
 ctx 
 ); 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "copier.Run: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "Object %v in bucket %v had its storage class set to %v\n" 
 , 
  
 object 
 , 
  
 bucket 
 , 
  
 newStorageClass 
 ) 
  
 return 
  
 nil 
 } 
 

  import 
  
 com.google.cloud.storage. Blob 
 
 ; 
 import 
  
 com.google.cloud.storage. BlobId 
 
 ; 
 import 
  
 com.google.cloud.storage. BlobInfo 
 
 ; 
 import 
  
 com.google.cloud.storage. Storage 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageClass 
 
 ; 
 import 
  
 com.google.cloud.storage. StorageOptions 
 
 ; 
 public 
  
 class 
 ChangeObjectStorageClass 
  
 { 
  
 public 
  
 static 
  
 void 
  
 changeObjectStorageClass 
 ( 
  
 String 
  
 projectId 
 , 
  
 String 
  
 bucketName 
 , 
  
 String 
  
 objectName 
 ) 
  
 { 
  
 // The ID of your GCP project 
  
 // String projectId = "your-project-id"; 
  
 // The ID of your GCS bucket 
  
 // String bucketName = "your-unique-bucket-name"; 
  
 // The ID of your GCS object 
  
 // String objectName = "your-object-name"; 
  
  Storage 
 
  
 storage 
  
 = 
  
  StorageOptions 
 
 . 
 newBuilder 
 (). 
 setProjectId 
 ( 
 projectId 
 ). 
 build 
 (). 
  getService 
 
 (); 
  
  BlobId 
 
  
 blobId 
  
 = 
  
  BlobId 
 
 . 
 of 
 ( 
 bucketName 
 , 
  
 objectName 
 ); 
  
  Blob 
 
  
 sourceBlob 
  
 = 
  
 storage 
 . 
  get 
 
 ( 
 blobId 
 ); 
  
 if 
  
 ( 
 sourceBlob 
  
 == 
  
 null 
 ) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "The object " 
  
 + 
  
 objectName 
  
 + 
  
 " wasn't found in " 
  
 + 
  
 bucketName 
 ); 
  
 return 
 ; 
  
 } 
  
 // See the StorageClass documentation for other valid storage classes: 
  
 // https://googleapis.dev/java/google-cloud-clients/latest/com/google/cloud/storage/StorageClass.html 
  
  StorageClass 
 
  
 storageClass 
  
 = 
  
  StorageClass 
 
 . 
 COLDLINE 
 ; 
  
 // You can't change an object's storage class directly, the only way is to rewrite the object 
  
 // with the desired storage class 
  
  BlobInfo 
 
  
 targetBlob 
  
 = 
  
  BlobInfo 
 
 . 
 newBuilder 
 ( 
 blobId 
 ). 
 setStorageClass 
 ( 
 storageClass 
 ). 
 build 
 (); 
  
 // Optional: set a generation-match precondition to avoid potential race 
  
 // conditions and data corruptions. The request to upload returns a 412 error if 
  
 // the object's generation number does not match your precondition. 
  
  Storage 
 
 . 
 BlobSourceOption 
  
 precondition 
  
 = 
  
  Storage 
 
 . 
 BlobSourceOption 
 . 
 generationMatch 
 ( 
 sourceBlob 
 . 
 getGeneration 
 ()); 
  
  Storage 
 
 . 
  CopyRequest 
 
  
 request 
  
 = 
  
  Storage 
 
 . 
 CopyRequest 
 . 
 newBuilder 
 () 
  
 . 
 setSource 
 ( 
 blobId 
 ) 
  
 . 
 setSourceOptions 
 ( 
 precondition 
 ) 
  
 // delete this line to run without preconditions 
  
 . 
 setTarget 
 ( 
 targetBlob 
 ) 
  
 . 
 build 
 (); 
  
  Blob 
 
  
 updatedBlob 
  
 = 
  
 storage 
 . 
  copy 
 
 ( 
 request 
 ). 
 getResult 
 (); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "Object " 
  
 + 
  
 objectName 
  
 + 
  
 " in bucket " 
  
 + 
  
 bucketName 
  
 + 
  
 " had its storage class set to " 
  
 + 
  
 updatedBlob 
 . 
 getStorageClass 
 (). 
  name 
 
 ()); 
  
 } 
 } 
 

  // Imports the Google Cloud client library 
 const 
  
 { 
 Storage 
 } 
  
 = 
  
 require 
 ( 
 ' @google-cloud/storage 
' 
 ); 
 // Creates a client 
 const 
  
 storage 
  
 = 
  
 new 
  
 Storage 
 (); 
 /** 
 * TODO(developer): Uncomment the following lines before running the sample. 
 */ 
 // The ID of your GCS bucket 
 // const bucketName = 'your-unique-bucket-name'; 
 // The ID of your GCS file 
 // const fileName = 'your-file-name'; 
 // The name of a storage class 
 // See the StorageClass documentation for other valid storage classes: 
 // https://googleapis.dev/java/google-cloud-clients/latest/com/google/cloud/storage/StorageClass.html 
 // const storageClass = 'coldline'; 
 async 
  
 function 
  
 fileChangeStorageClass 
 () 
  
 { 
  
 // Optional: 
  
 // Set a generation-match precondition to avoid potential race conditions 
  
 // and data corruptions. The request to copy is aborted if the object's 
  
 // generation number does not match your precondition. For a destination 
  
 // object that does not yet exist, set the ifGenerationMatch precondition to 0 
  
 // If the destination object already exists in your bucket, set instead a 
  
 // generation-match precondition using its generation number. 
  
 const 
  
 setStorageClassOptions 
  
 = 
  
 { 
  
 ifGenerationMatch 
 : 
  
 generationMatchPrecondition 
 , 
  
 }; 
  
 await 
  
 storage 
  
 . 
 bucket 
 ( 
 bucketName 
 ) 
  
 . 
 file 
 ( 
 fileName 
 ) 
  
 . 
 setStorageClass 
 ( 
 storageClass 
 , 
  
 setStorageClassOptions 
 ); 
  
 console 
 . 
 log 
 ( 
 ` 
 ${ 
 fileName 
 } 
 has been set to 
 ${ 
 storageClass 
 } 
 ` 
 ); 
 } 
 fileChangeStorageClass 
 (). 
 catch 
 ( 
 console 
 . 
 error 
 ); 
 

  use Google\Cloud\Storage\StorageClient; 
 /** 
 * Change the storage class of the given file. 
 * 
 * @param string $bucketName The name of your Cloud Storage bucket. 
 *        (e.g. 'my-bucket') 
 * @param string $objectName The name of your Cloud Storage object. 
 *        (e.g. 'my-object') 
 * @param string $storageClass The storage class of the new object. 
 *        (e.g. 'COLDLINE') 
 */ 
 function change_file_storage_class(string $bucketName, string $objectName, string $storageClass): void 
 { 
 $storage = new StorageClient(); 
 $bucket = $storage->bucket($bucketName); 
 $object = $bucket->object($objectName); 
 // Storage class cannot be changed directly. But we can rewrite the object 
 // using the new storage class. 
 $newObject = $object->rewrite($bucket, [ 
 'storageClass' => $storageClass, 
 ]); 
 printf( 
 'Object %s in bucket %s had its storage class set to %s', 
 $objectName, 
 $bucketName, 
 $newObject->info()['storageClass'] 
 ); 
 } 
 

  from 
  
 google.cloud 
  
 import 
  storage 
 
 def 
  
 change_file_storage_class 
 ( 
 bucket_name 
 , 
 blob_name 
 ): 
  
 """Change the default storage class of the blob""" 
 # bucket_name = "your-bucket-name" 
 # blob_name = "your-object-name" 
 storage_client 
 = 
  storage 
 
 . 
  Client 
 
 () 
 bucket 
 = 
 storage_client 
 . 
  bucket 
 
 ( 
 bucket_name 
 ) 
 blob 
 = 
 bucket 
 . 
 blob 
 ( 
 blob_name 
 ) 
 generation_match_precondition 
 = 
 None 
 # Optional: set a generation-match precondition to avoid potential race 
 # conditions and data corruptions. The request is aborted if the 
 # object's generation number does not match your precondition. 
 blob 
 . 
 reload 
 () 
 # Fetch blob metadata to use in generation_match_precondition. 
 generation_match_precondition 
 = 
 blob 
 . 
 generation 
 blob 
 . 
  update_storage_class 
 
 ( 
 "NEARLINE" 
 , 
 if_generation_match 
 = 
 generation_match_precondition 
 ) 
 print 
 ( 
 "Blob 
 {} 
 in bucket 
 {} 
 had its storage class set to 
 {} 
 " 
 . 
 format 
 ( 
 blob_name 
 , 
 bucket_name 
 , 
 blob 
 . 
 storage_class 
 ) 
 ) 
 return 
 blob 
 

  def 
  
 change_file_storage_class 
  
 bucket_name 
 :, 
  
 file_name 
 : 
  
 # The ID of your GCS bucket 
  
 # bucket_name = "your-unique-bucket-name" 
  
 # The ID of your GCS object 
  
 # file_name = "your-file-name" 
  
 require 
  
 "google/cloud/storage" 
  
 storage 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  Storage 
 
 . 
  new 
 
  
 bucket 
  
 = 
  
 storage 
 . 
 bucket 
  
 bucket_name 
 , 
  
 skip_lookup 
 : 
  
 true 
  
 file 
  
 = 
  
 bucket 
 . 
  file 
 
  
 file_name 
  
 file 
 . 
 storage_class 
  
 = 
  
 "NEARLINE" 
  
 puts 
  
 "File 
 #{ 
 file_name 
 } 
 in bucket 
 #{ 
 bucket_name 
 } 
 had its storage class set to 
 #{ 
 file 
 . 
 storage_class 
 } 
 " 
 end