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E47 docs: add batch sample (#1559) · googleapis/java-storage@583bf73 · GitHub
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docs: add batch sample (#1559)
* docs: add batch sample * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * copyright * fix whitespace Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
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‎README.md

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@@ -285,6 +285,7 @@ Samples are in the [`samples/`](https://github.com/googleapis/java-storage/tree/
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| Get Hmac Key | [source code](https://github.com/googleapis/java-storage/blob/main/samples/snippets/src/main/java/com/example/storage/hmac/GetHmacKey.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-storage&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/storage/hmac/GetHmacKey.java) |
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| List Hmac Keys | [source code](https://github.com/googleapis/java-storage/blob/main/samples/snippets/src/main/java/com/example/storage/hmac/ListHmacKeys.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-storage&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/storage/hmac/ListHmacKeys.java) |
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| Add File Owner | [source code](https://github.com/googleapis/java-storage/blob/main/samples/snippets/src/main/java/com/example/storage/object/AddFileOwner.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-storage&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/storage/object/AddFileOwner.java) |
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| Batch Set Object Metadata | [source code](https://github.com/googleapis/java-storage/blob/main/samples/snippets/src/main/java/com/example/storage/object/BatchSetObjectMetadata.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-storage&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/storage/object/BatchSetObjectMetadata.java) |
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| Change Object Csek To Kms | [source code](https://github.com/googleapis/java-storage/blob/main/samples/snippets/src/main/java/com/example/storage/object/ChangeObjectCsekToKms.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-storage&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/storage/object/ChangeObjectCsekToKms.java) |
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| Change Object Storage Class | [source code](https://github.com/googleapis/java-storage/blob/main/samples/snippets/src/main/java/com/example/storage/object/ChangeObjectStorageClass.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-storage&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/storage/object/ChangeObjectStorageClass.java) |
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| Compose Object | [source code](https://github.com/googleapis/java-storage/blob/main/samples/snippets/src/main/java/com/example/storage/object/ComposeObject.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-storage&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/storage/object/ComposeObject.java) |

‎samples/snippets/src/main/java/com/example/storage/object/BatchSetObjectMetadata.java

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/*
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* Copyright 2022 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.storage.object;
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// [START storage_batch_request]
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import com.google.api.gax.paging.Page;
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import com.google.cloud.storage.Blob;
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import com.google.cloud.storage.Storage;
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import com.google.cloud.storage.StorageBatch;
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import com.google.cloud.storage.StorageOptions;
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import java.util.HashMap;
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import java.util.Map;
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public class BatchSetObjectMetadata {
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public static void batchSetObjectMetadata(
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String projectId, String bucketName, String directoryPrefix) {
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// The ID of your GCP project
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// String projectId = "your-project-id";
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// The ID of your GCS bucket
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// String bucketName = "your-unique-bucket-name";
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// The directory prefix. All objects in the bucket with this prefix will have their metadata
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// updated
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// String directoryPrefix = "yourDirectory/";
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Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
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Map<String, String> newMetadata = new HashMap<>();
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newMetadata.put("keyToAddOrUpdate", "value");
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Page<Blob> blobs =
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storage.list(
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bucketName,
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Storage.BlobListOption.prefix(directoryPrefix),
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Storage.BlobListOption.currentDirectory());
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StorageBatch batchRequest = storage.batch();
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// Add all blobs with the given prefix to the batch request
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for (Blob blob : blobs.iterateAll()) {
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batchRequest.update(blob.toBuilder().setMetadata(newMetadata).build());
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}
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// Execute the batch request
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batchRequest.submit();
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System.out.println(
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"All blobs in bucket "
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+ bucketName
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+ " with prefix '"
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+ directoryPrefix
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+ "' had their metadata updated.");
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}
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}
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// [END storage_batch_request]

‎samples/snippets/src/test/java/com/example/storage/ITObjectSnippets.java

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import static org.junit.Assert.assertNull;
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import static org.junit.Assert.assertTrue;
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import com.example.storage.object.BatchSetObjectMetadata;
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import com.example.storage.object.ChangeObjectCsekToKms;
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import com.example.storage.object.ChangeObjectStorageClass;
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import com.example.storage.object.ComposeObject;
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UploadKmsEncryptedObject.uploadKmsEncryptedObject(PROJECT_ID, BUCKET, blobName, KMS_KEY_NAME);
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assertNotNull(storage.get(BUCKET, blobName));
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}
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@Test
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public void testBatchSetObjectMetadata() {
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storage.create(BlobInfo.newBuilder(BUCKET, "b/1.txt").build());
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storage.create(BlobInfo.newBuilder(BUCKET, "b/2.txt").build());
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BatchSetObjectMetadata.batchSetObjectMetadata(PROJECT_ID, BUCKET, "b/");
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Map<String, String> firstBlobMetadata = storage.get(BUCKET, "b/1.txt").getMetadata();
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Map<String, String> secondBlobMetadata = storage.get(BUCKET, "b/2.txt").getMetadata();
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assertEquals("value", firstBlobMetadata.get("keyToAddOrUpdate"));
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assertEquals("value", secondBlobMetadata.get("keyToAddOrUpdate"));
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}
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}

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