Tag: V3

Announcing the Modularized AWS SDK for Ruby (Version 3)

by Alex Wood | on | in Ruby | Permalink | Comments |  Share

We’re excited to announce today’s stable release of version 3 of the AWS SDK for Ruby. The SDK is now available with over 100 service-specific gems (starting with aws-sdk-*, such as aws-sdk-s3) on RubyGems. You can find a full list of available service gems can be found at our GitHub landing page.


Version 3 of the AWS SDK for Ruby modularizes the monolithic SDK into service-specific gems, for example, aws-sdk-s3 and aws-sdk-dynamodb. Now each service gem uses strict semantic versioning, along with the benefits of continuous delivery of AWS API updates. With modularization, you can pick and choose which service gems your application or library requires, and update service gems independently of each other.

These new service-specific gems use statically generated code, rather than runtime-generated clients and types. This provides human-readable stack traces and code for API clients. Additionally, version 3 eliminates many thread safety issues by removing Ruby autoload statements. When you require a service gem, such as aws-sdk-ec2, all of the code is loaded upfront, avoiding sync issues with autoload.

Furthermore, the SDK provides AWS Signature Version 4 signing functionality as a separate gem aws-sigv4. This gem provides flexible signing usage for both AWS requests and customized scenarios.


We’ve provided a detailed upgrading guide with this release, which covers different upgrade scenarios. In short, the public-facing APIs are compatible, and so changes you need to make are focused on your Gemfile and require statements.

Most users of the SDK have a setup similar to this:

# Gemfile
gem 'aws-sdk', '~> 2'
# Code Files
require 'aws-sdk'

s3 = Aws::S3::Client.new

ddb = Aws::DynamoDB::Client.new

# etc.

If that’s you, the quickest migration path is to simply change your Gemfile like so:

# Gemfile
gem 'aws-sdk', '~> 3'

However, this will pull in many new dependencies, as each service client has its own individual gem. As a direct user, you can also change to using only the service gems actually required by your project, which is the recommended path. This would involve a change to both your Gemfile and to the code files where your require statements live, like so:

# Gemfile
gem 'aws-sdk-s3', '~> 1'
gem 'aws-sdk-dynamodb', '~> 1'
# Code Files
require 'aws-sdk-s3'
require 'aws-sdk-dynamodb'

s3 = Aws::S3::Client.new
ddb = Aws::DynamoDB::Client.new

# etc.

Other upgrade cases are covered in the guide.


Please share your questions, comments, issues, etc. with us on GitHub. You can also catch us in our Gitter channel.

Version 3 of the AWS SDK for .NET Out of Preview

by Norm Johanson | on | in .NET | Permalink | Comments |  Share

Back in February, we announced our intention to release a new major version of the AWS SDK for .NET. In April, we released a preview on NuGet. After receiving great feedback from users, today we are taking version 3 of the AWS SDK for .NET out of preview. This means the preview flag has been removed from the NuGet packages. The SDK is now included in our MSI installer from our website.

Version 3 is a new, modularized SDK. Every service is a separate assembly and distributed as a separate NuGet package. Each service has a dependency on a common runtime, AWSSDK.Core. This has been a major request from our users, especially now that AWS has grown to over 50 services. This design also gives SDK users better control over when to upgrade to the newest service updates.

We wanted to make the transition to version 3 as easy possible, so there are very few breaking changes to the public API. For the full list of changes, see our API Reference which contains a migration guide.

Our hope is that most users will just need to replace the old reference to version 2 and add the reference to the services they are using. If you are using NuGet to get the SDK, the reference to our core runtime package will be added automatically. If you are getting the SDK from the installer on our website, then you will need to add a reference to AWSSDK.Core.

Xamarin Preview

We recently announced a public preview of Xamarin support, which is part of version 3. Even though the SDK is now widely available, Xamarin and the Portable Class Library version of the SDK are still in preview. We encourage you to try the new Xamarin support and give us feedback, but we are not ready for users to publish production applications just yet. Users with an immediate need for Windows Phone and Windows Store support should continue using version 2 until the PCL version of the SDK version 3 is production-ready.


With our move to version 3, we have also switched our AWS Tools for Windows PowerShell to the new SDK. The version numbers for AWS SDK for .NET and our AWS Tools for Windows PowerShell are kept in sync, so AWS Tools for Windows PowerShell is getting a major version bump to 3. There are otherwise no major changes to AWS Tools for Windows PowerShell.

Changes to Our Installer

The installer has been updated to contain version 3 of the SDK, but it also contains version 2 for users who are not ready to move to version 3. The Portable Class Library version of the SDK (which includes Xamarin support) is only distributed through NuGet and will not be available through the installer. The Portable Class Library uses platform-specific dependencies which are automatically resolved when references are added through NuGet. This would be a complex process if done manually or without NuGet.

Packages on NuGet

For an up to date list of the version 3 NuGet packages check out the NuGet section in the SDK’s github README.md.

Version 3 of the AWS SDK for PHP

by Jeremy Lindblom | on | in PHP | Permalink | Comments |  Share

Last October, we announced the Developer Preview of Version 3 of the AWS SDK for PHP. We even presented about it at AWS re:Invent last November. We are grateful for your early feedback and support. Since last fall, we’ve been hard at work on improving, testing, and documenting Version 3 to get it ready for a stable release. We’re excited to announce that Version 3 of the AWS SDK for PHP is now generally available via Composer and on GitHub.

Version 3 of the SDK (V3) represents a significant effort to improve the capabilities of the SDK, incorporate over two years of customer feedback, upgrade our dependencies, improve performance, and adopt the latest PHP standards.

What we’re excited about

We’ve made many improvements to V3, even since our blog post about the Developer Preview (check out that post if you haven’t already). There are also some things that have changed or have been removed since Version 2 of the SDK (V2). We encourage you to take a look at our V3 Migration Guide for all the details about what has changed.

V3 has less code and better performance than V2 and is using the latest version of the Guzzle HTTP library. It also has some exciting new features and improvements.

Asynchronous requests and promises

V3 allows you to execute operations asynchronously. This not only means that it is easier to do concurrent requests, it’s also easier to create asynchronous and cooperative workflows. We use Promises, the basic building block of our asynchronous features, all throughout the SDK’s core. We also use them to implement the higher-level abstractions SDK, including Command Pools, Paginators, Waiters, and service-specific features like the S3 MultipartUploader. That means that almost every feature of the SDK can be used in an asynchronous way.

To execute an operation asynchronously, you simply add "Async" as a suffix to your method call.

// The SYNCHRONOUS (normal) way:

// Executing an operation returns a Result object.
$result = $s3Client->putObject([
    'Bucket' => 'your-bucket',
    'Key'    => 'docs/file.pdf',
    'Body'   => fopen('/path/to/file.pdf', 'r'),

// You can access the result data from the Result object.
echo $result['ObjectURL'];


// Executing an operation asynchronously returns a Promise object.
$promise = $s3Client->putObjectAsync([
    'Bucket' => 'your-bucket',
    'Key'    => 'docs/file.pdf',
    'Body'   => fopen('/path/to/file.pdf', 'r'),

// Wait for the operation to complete to get the Result object.
$result = $promise->wait();

// Then you can access the result data like normal.
echo $result['ObjectURL'];

The true power of using asynchronous requests is being able to create asynchronous workflows. For example, if you wanted to create a DynamoDB table, wait until it is ACTIVE (using Waiters), and then write some data to it, you can use the then() method of the Promise object to chain those actions together.

    'TableName' => $table,
    // Other params...
])->then(function () use ($client, $table) {
    return $client->getWaiter('TableExists', [
        'TableName' => $table,
})->then(function () use ($client, $table) {
    return $client->putItemAsync([
        'TableName' => $table,
        'Item' => [
            // Item attributes...

Please take a look at our detailed guide on promises for more information.

PSR-7 compliance and decoupling of the HTTP layer

The PHP-FIG has recently announced the acceptance of PSR-7, a "PHP Standard Recommendation" that defines interfaces for HTTP messages (e.g., Request and Response objects). We have adopted these interfaces for how we represent HTTP requests within the SDK, and it has allowed us to decouple the SDK from Guzzle such that V3 will work with both Guzzle 5 and Guzzle 6. It’s also possible to write your own HTTP handler for the SDK that does not use Guzzle.

The SDK defaults to using Guzzle 6 to perform HTTP requests. Guzzle 6 comes with a number of improvements, including support for asynchronous requests, PSR-7 compliance, and swappable HTTP adapters (including a PHP stream wrapper implementation that can be used on systems where cURL is not available).

JMESPath querying of results and paginators

In V3, the Result object has a new method: search(). With this method you can query data in Result objects using JMESPath expressions. JMESPath is a query language for JSON, or, in our case, PHP arrays.

$result = $ec2Client->describeInstances();

JMESPath expressions can also be applied to Paginators in the same way. This will return a new Iterator that yields the result of the expression on every page of data.

$results = $s3->getPaginator('ListObjects', [
    'Bucket' => 'my-bucket',
foreach ($results->search('Contents[].Key') as $key) {
    echo $key . "n";

Time to code

We hope you will enjoy using Version 3 of the AWS SDK for PHP. Here are the links you need to get started:

AWS re:Invent 2014

by Jeremy Lindblom | on | in PHP | Permalink | Comments |  Share

We spent the past week at AWS re:Invent! The PHP SDK team was there with many of our co-workers and customers. It was a great conference, and we had a lot of fun.

If you did not attend re:Invent or follow our @awsforphp Twitter feed during the event, then you have a lot to catch up on.

New AWS Services and Features

Several new services were announced during the keynotes, on both the first day and second day, and during other parts of the event.

During the first keynote, three new AWS services for code management and deployment were announced: AWS CodeDeploy, AWS CodeCommit, and AWS CodePipeline. CodeDeploy is available today, and can help you automate code deployments to Amazon EC2 instances.

Additionally, three other new services were revealed that are related to enterprise security and compliance: AWS Key Management Service (AWS KMS), AWS Config, and AWS Service Catalog.

Amazon RDS for Aurora was also announced during the first keynote. Amazon Aurora is a new, MySQL-compatible, relational database engine built for high performance and availability.

The keynote on the second day boasted even more announcements, including the new Amazon EC2 Container Service, which is a highly scalable, high performance container management service that supports Docker containers.

Also, new compute-optimized (C4) Amazon EC2 Instances were announced, as well as new larger and faster Elastic Block Store (EBS) volumes backed with SSDs.

AWS Lambda was introduced during the second keynote, as well. It is a new compute service that runs your code in response to events and automatically manages the compute resources for you. To learn about AWS Lambda in more detail, you should check out their session at re:Invent, which shows how you can implement image thumbnail generation in your applications using AWS Lambda and the new Amazon S3 Event Notifications feature. They also briefly mention the upcoming DynamoDB streams feature in that presentation, which was announced just prior to the conference.

The APIs for AWS CodeDeploy, AWS KMS, AWS Config, and AWS Lambda are currently available, and all are supported in the AWS SDK for PHP as of version 2.7.5.

PHP Presentations

I had the honor of presenting a session about the PHP SDK called Building Apps with the AWS SDK for PHP, where I explained how to use many of the new features from Version 3 of the SDK in the context of building an application I called "SelPHPies with ElePHPants". You should definitely check it out whether you are new to or experienced with the SDK.

Here are the links to my presentation as well as two other PHP-specific sessions that you might be interested in.

  • Building Apps with the AWS SDK for PHP (slides, video)
  • Best Practices for Running WordPress on AWS (slides, video)
  • Running and Scaling Magento on AWS (video)

There were so many other great presentations at re:Invent. The slides, videos, and podcasts for all of the presentations are (or will be) posted online.


Announcements and presentations are exciting and informative, but my favorite part about any conference is the people. Re:Invent was no exception.

It was great to run into familiar faces from my Twitter stream like Juozas Kaziukėnas, Ben Ramsey, Brian DeShong, and Boaz Ziniman. I also had the pleasure of meeting some new friends from companies that had sent their PHP developers to the conference.

See You Next Year

We hope you take the time to check out some of the presentations from this year’s event, and consider attending next year. Get notified about registration for next year’s event by signing up for the re:Invent mailing list on the AWS re:Invent website.

Version 3 Preview of the AWS SDK

by Jeremy Lindblom | on | in PHP | Permalink | Comments |  Share

We’re excited to introduce you to the preview release of Version 3 of the AWS SDK for PHP! As of today, the preview release of Version 3 (V3) is available on GitHub and via Composer.

Two years ago, we released Version 2 (V2) of the SDK. Since then, thousands of developers and companies have adopted it. We are sincerely grateful to all of our users and contributors. We have been constantly collecting your feedback and ideas, and continually watching the evolution of PHP, AWS, and the Guzzle library.

Earlier this year, we felt we could make significant improvements to the SDK, but only if we could break a few things. Since receiving a unanimously positive response to our blog post about updating to the latest version of Guzzle a few months ago, we’ve been working hard on V3, and we’re ready to share it with you.

What’s new?

The new version of the SDK provides a number of important benefits to AWS customers. It is smaller and faster, with improved performance for both serial and concurrent requests. It has several new features based on its use of the new Guzzle 5 library (which also includes the new features from Guzzle 4). The SDK will also, starting from V3, follow the official SemVer spec, so you can have complete confidence when setting version constraints in your projects’ composer.json files.

Let’s take a quick look at some of the new features.

Asynchronous requests

With V3, you can perform asynchronous operations, which allow you to more easily send requests concurrently. To achieve this, the SDK returns future result objects when you specify the @future parameter, which block only when they are accessed. For managing more robust asynchronous workflows, you can retrieve a promise from the future result, to perform logic once the result becomes available or an exception is thrown.


// Upload a file to your bucket in Amazon S3.
// Use '@future' to make the operation complete asynchronously.
$result = $s3Client->putObject([
    'Bucket' => 'your-bucket',
    'Key'    => 'docs/file.pdf',
    'Body'   => fopen('/path/to/file.pdf', 'r'),
    '@future' => true,

After creating a result using the @future attribute, you now have a future result object. You can use the data stored in the future in a blocking (or synchronous) manner by just using the result as normal (i.e., like a PHP array).

// Wait until the response has been received before accessing its data.
echo $result['ObjectURL'];

If you want to allow your requests to complete asynchronously, then you should use the promise API of the future result object. To retrieve the promise, you must use the then() method of the future result, and provide a callback to be completed when the promise is fulfilled. Promises allow you to more easily compose pipelines when dealing with asynchronous results. For example, we could use promises to save the Amazon S3 object’s URL to an item in an Amazon DynamoDB table, once the upload is complete.

// Note: $result is the result of the preceding example's PutObject operation.
    function ($s3Result) use ($ddbClient) {
        $ddbResult = $ddbClient->putItem([
            'TableName' => 'your-table',
            'Item' => [
                'topic' => ['S' => 'docs'],
                'time'  => ['N' => (string) time()],
                'url'   => ['S' => $s3Result['ObjectURL']],
            '@future' => true,

        // Don't break promise chains; return a value. In this case, we are returning
        // another promise, so the PutItem operation can complete asynchronously too.
        return $ddbResult->promise();
    function ($result) {
        echo "SUCCESS!n";
        return $result;
    function ($error) {
        echo "FAILED. " . $error->getMessage() . "n";
        // Forward the rejection by re-throwing it.
        throw $error;

The SDK uses the React/Promise library to provide the promise functionality, allowing for additional features such as joining and mapping promises.

JMESPath querying of results

The result object also has a new search() method that allows you to query the result data using JMESPath, a query language for JSON (or PHP arrays, in our case).


$result = $ec2Client->describeInstances();


Example output:

    [0] => i-xxxxxxxx
    [1] => i-yyyyyyyy
    [2] => i-zzzzzzzz

Swappable and custom HTTP adapters

In V3, cURL is no longer required, but is still used by the default HTTP adapter. However, you can use other HTTP adapters, like the one shipped with Guzzle that uses PHP’s HTTP stream wrapper. You can also write custom adapters, which opens up the possibility of creating an adapter that integrates with a non-blocking event loop like ReactPHP.


Paginators are a new feature in V3, that come as an addition to Iterators from V2. Paginators are similar to Iterators, except that they yield Result objects, instead of items within a result. This is nice, because it handles the tokens/markers for you, getting multiple pages of results, but gives you the flexibility to extract whatever data you want.

// List all "directories" and "files" in the bucket.
$paginator = $s3->getPaginator('ListObjects', [
    'Bucket' => 'my-bucket',
    'Delimiter' => '/'
foreach ($paginator as $result) {
    $jmespathExpr = '[CommonPrefixes[].Prefix, Contents[].Key][]';
    foreach ($result->search($jmespathExpr) as $item) {
        echo $item . "n";

Example output:

    [0] => dir1/
    [1] => dir2/
    [2] => file1
    [3] => file2

New event system

Version 3 features a new and improved event system. Command objects now have their own event emitter that is decoupled from the HTTP request events. There is also a new request "progress" event that can be used for tracking upload and download progress.

use GuzzleHttpEventProgressEvent;

$s3->getHttpClient()->getEmitter()->on('progress', function (ProgressEvent $e) {
    echo 'Uploaded ' . $e->uploaded . ' of ' . $e->uploadSize . "n";

   'Bucket' => $bucket,
   'Key'    => 'docs/file.pdf',
   'Body'   => fopen('/path/to/file.pdf', 'r'),

Example output:

Uploaded 0 of 5299866
Uploaded 16384 of 5299866
Uploaded 32768 of 5299866
Uploaded 5275648 of 5299866
Uploaded 5292032 of 5299866
Uploaded 5299866 of 5299866

New client options

For V3, we changed some of the options you provide when instantiating a client, but we added a few new options that may help you work with services more easily.

  • "debug" – Set to true to print out debug information as requests are being made. You’ll see how the Command and Request objects are affected during each event, and an adapter-specific wire log of the request.
  • "retries" – Set the maximum number of retries the client will perform on failed and throttled requests. The default has always been 3, but now it is easy to configure.

These options can be set when instantiating client.


$s3 = (new AwsSdk)->getS3([
    // Exist in Version 2 and 3
    'profile'  => 'my-credential-profile',
    'region'   => 'us-east-1',
    'version'  => 'latest',

    // New in Version 3
    'debug'    => true,
    'retries'  => 5,

What has changed?

To make all of these improvements for V3, we needed to make some backward-incompatible changes. However, the changes from Version 2 to Version 3 are much fewer than the changes from Version 1 to Version 2. In fact, much of the way you use the SDK will remain the same. For example, the following code for writing an item to an Amazon DynamoDB table looks exactly the same in both V2 and V3 of the SDK.

$result = $dynamoDbClient->putItem([
    'TableName' => 'Contacts',
    'Item'      => [
        'FirstName' => ['S' => 'Jeremy'],
        'LastName'  => ['S' => 'Lindblom'],
        'Birthday'  => ['M' => [
            'Month' => ['N' => '11'],
            'Date'  => ['N' => '24'],

There are two important changes though that you should be aware of upfront:

  1. V3 requires PHP 5.5 or higher and requires the use of Guzzle 5.
  2. You must now specify the API version (via the "version" client option) when you instantiate a client. This is important, because it allows you to lock-in to the API versions of the services you are using. This helps us and you maintain backward compatibility between future SDK releases, because you will be in charge of API versions you are using. Your code will never be impacted by new service API versions until you update your version setting. If this is not a concern for you, you can default to the latest API version by setting 'version' to 'latest' (this is essentially the default behavior of V2).

What next?

We hope you are excited for Version 3 of the SDK!

We look forward to your feedback as we continue to work towards a stable release. Please reach out to us in the comments, on GitHub, or via Twitter (@awsforphp). We plan to publish more blog posts in the near future to explain some of the new features in more detail. We have already published the API docs for V3, but we’ll be working on improving all the documentation for V3, including creating detailed migration and user guides. We’ll also be speaking about V3 in our session at AWS re:Invent.

We will continue updating and making regular releases for V2 on the "master" branch of the SDK’s GitHub repository. Our work on V3 will happen on a separate "v3" branch until we are ready for a stable release.

Version 3 can be installed via Composer using version 3.0.0-beta.1, or you can download the aws.phar or aws.zip on GitHub.