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BatchSetObjectMetadata.java
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BatchSetObjectMetadata.java
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/*
* Copyright 2022 Google LLC
*
* 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 com.example.storage.object;
// [START storage_batch_request]
import com.google.api.gax.paging.Page;
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageBatch;
import com.google.cloud.storage.StorageOptions;
import java.util.HashMap;
import java.util.Map;
public class BatchSetObjectMetadata {
public static void batchSetObjectMetadata(
String projectId, String bucketName, String directoryPrefix) {
// The ID of your GCP project
// String projectId = "your-project-id";
// The ID of your GCS bucket
// String bucketName = "your-unique-bucket-name";
// The directory prefix. All objects in the bucket with this prefix will have their metadata
// updated
// String directoryPrefix = "yourDirectory/";
Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
Map<String, String> newMetadata = new HashMap<>();
newMetadata.put("keyToAddOrUpdate", "value");
Page<Blob> blobs =
storage.list(
bucketName,
Storage.BlobListOption.prefix(directoryPrefix),
Storage.BlobListOption.currentDirectory());
StorageBatch batchRequest = storage.batch();
// Add all blobs with the given prefix to the batch request
for (Blob blob : blobs.iterateAll()) {
batchRequest.update(blob.toBuilder().setMetadata(newMetadata).build());
}
// Execute the batch request
batchRequest.submit();
System.out.println(
"All blobs in bucket "
+ bucketName
+ " with prefix '"
+ directoryPrefix
+ "' had their metadata updated.");
}
}
// [END storage_batch_request]