Azure Storage Blobs Batch client library for Java - version 12.24.0

Artikel
09/18/2024

Azure Blob storage is Microsoft's object storage solution for the cloud. Blob storage is optimized for storing massive amounts of unstructured data. Unstructured data is data that does not adhere to a particular data model or definition, such as text or binary data.

Source code | API reference documentation | REST API documentation | Product documentation | Samples

Getting started

Prerequisites

Java Development Kit (JDK) with version 8 or above
- Here are details about Java 8 client compatibility with Azure Certificate Authority.
Azure Subscription
Create Storage Account

Include the package

Include the BOM file

Please include the azure-sdk-bom to your project to take dependency on GA version of the library. In the following snippet, replace the {bom_version_to_target} placeholder with the version number. To learn more about the BOM, see the AZURE SDK BOM README.

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>com.azure</groupId>
            <artifactId>azure-sdk-bom</artifactId>
            <version>{bom_version_to_target}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

and then include the direct dependency in the dependencies section without the version tag.

<dependencies>
  <dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-storage-blob-batch</artifactId>
  </dependency>
</dependencies>

Include direct dependency

If you want to take dependency on a particular version of the library that is not present in the BOM, add the direct dependency to your project as follows.

<dependency>
  <groupId>com.azure</groupId>
  <artifactId>azure-storage-blob-batch</artifactId>
  <version>12.24.0</version>
</dependency>

Create a Storage Account

To create a Storage Account you can use the Azure Portal or Azure CLI.

az storage account create \
    --resource-group <resource-group-name> \
    --name <storage-account-name> \
    --location <location>

Key concepts

Blob storage is designed for:

Serving images or documents directly to a browser.
Storing files for distributed access.
Streaming video and audio.
Writing to log files.
Storing data for backup and restore, disaster recovery, and archiving.
Storing data for analysis by an on-premises or Azure-hosted service.

Examples

The following sections provide several code snippets covering some of the most common Azure Storage Blob Batch tasks, including:

Creating BlobBatchClient
Bulk Deleting Blobs
Bulk Setting AccessTier
Advanced Batching

Creating BlobBatchClient

Create a BlobBatchClient from a BlobServiceClient.

BlobBatchClient blobBatchClient = new BlobBatchClientBuilder(blobServiceClient).buildClient();

Bulk Deleting Blobs

blobBatchClient.deleteBlobs(blobUrls, DeleteSnapshotsOptionType.INCLUDE).forEach(response ->
    System.out.printf("Deleting blob with URL %s completed with status code %d%n",
        response.getRequest().getUrl(), response.getStatusCode()));

Bulk Setting AccessTier

blobBatchClient.setBlobsAccessTier(blobUrls, AccessTier.HOT).forEach(response ->
    System.out.printf("Setting blob access tier with URL %s completed with status code %d%n",
        response.getRequest().getUrl(), response.getStatusCode()));

Advanced Batching

Deleting blobs in a batch that have different pre-requisites.

BlobBatch blobBatch = blobBatchClient.getBlobBatch();

// Delete a blob.
Response<Void> deleteResponse = blobBatch.deleteBlob(blobUrl);

// Delete a specific blob snapshot.
Response<Void> deleteSnapshotResponse =
    blobBatch.deleteBlob(blobUrlWithSnapshot, DeleteSnapshotsOptionType.ONLY, null);

// Delete a blob that has a lease.
Response<Void> deleteWithLeaseResponse =
    blobBatch.deleteBlob(blobUrlWithLease, DeleteSnapshotsOptionType.INCLUDE, new BlobRequestConditions()
        .setLeaseId("leaseId"));

blobBatchClient.submitBatch(blobBatch);
System.out.printf("Deleting blob completed with status code %d%n", deleteResponse.getStatusCode());
System.out.printf("Deleting blob snapshot completed with status code %d%n",
    deleteSnapshotResponse.getStatusCode());
System.out.printf("Deleting blob with lease completed with status code %d%n",
    deleteWithLeaseResponse.getStatusCode());

Setting AccessTier on blobs in batch that have different pre-requisites.

BlobBatch blobBatch = blobBatchClient.getBlobBatch();

// Set AccessTier on a blob.
Response<Void> setTierResponse = blobBatch.setBlobAccessTier(blobUrl, AccessTier.COOL);

// Set AccessTier on another blob.
Response<Void> setTierResponse2 = blobBatch.setBlobAccessTier(blobUrl2, AccessTier.ARCHIVE);

// Set AccessTier on a blob that has a lease.
Response<Void> setTierWithLeaseResponse = blobBatch.setBlobAccessTier(blobUrlWithLease, AccessTier.HOT,
    "leaseId");

blobBatchClient.submitBatch(blobBatch);
System.out.printf("Set AccessTier on blob completed with status code %d%n", setTierResponse.getStatusCode());
System.out.printf("Set AccessTier on blob completed with status code %d%n", setTierResponse2.getStatusCode());
System.out.printf("Set AccessTier on  blob with lease completed with status code %d%n",
    setTierWithLeaseResponse.getStatusCode());

Troubleshooting

When interacts with blobs using this Java client library, errors returned by the service correspond to the same HTTP status codes returned for REST API requests. For example, if you try to retrieve a container or blob that doesn't exist in your Storage Account, a 404 error is returned, indicating Not Found.

Default HTTP Client

All client libraries by default use the Netty HTTP client. Adding the above dependency will automatically configure the client library to use the Netty HTTP client. Configuring or changing the HTTP client is detailed in the HTTP clients wiki.

Default SSL library

All client libraries, by default, use the Tomcat-native Boring SSL library to enable native-level performance for SSL operations. The Boring SSL library is an uber jar containing native libraries for Linux / macOS / Windows, and provides better performance compared to the default SSL implementation within the JDK. For more information, including how to reduce the dependency size, refer to the performance tuning section of the wiki.

Next steps

Get started with our Blob Batch samples:

Contributing

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

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