Learn how to work with Amazon DynamoDB using the AWS SDK for PHP. Attendees learn about the AWS SDK for PHP including how to install and configure the SDK and how to perform operations with DynamoDB. Advanced discussion topics include tips for effective DynamoDB usage, request batching, performance tuning, configuring event listeners, and setting up the included DynamoDB session handler for session storage.

1. #reinvent

2. AWS SDK for PHP 2

3. re:
• Faster and more flexible
• More open source

4. • Foundation of the AWS SDK
• Symfony2 EventDispatcher
http://guzzlephp.org

5. Getting Started with the AWS SDK for PHP
require 'vendor/autoload.php';
$aws = AwsCommonAws::factory(array(
'key' => 'your-aws-access-key-id',
'secret' => 'your-aws-secret-access-key',
'region' => 'us-west-2'
));
$db = $aws->get('dynamodb');
$s3 = $aws->get('s3');

8. Amazon DynamoDB

11. Website hosted on
AWS Elastic Beanstalk
Pet profiles and appointments
stored in Amazon DynamoDB

12. Part 1: Outbreak
Time to scale up!

16. Session Handler – Basic Usage
// Register the handler
$db = $aws->get('dynamodb');
$db->registerSessionHandler(array(
'table_name' => 'sessions'
));
// Use PHP sessions like normal
session_start();
$_SESSION[‘abc'] = 'bar';
session_write_close();

19. <1KB

20. Part 2: Triage
Let's query!

21. Puppies Kittens Old dogs Old cats Hefty cats

22. • S: Id array(
'Id' => array('S' => '000012'),
'Species' => array('S' => 'Cat'),
'Name' => array('S' => 'Fluffy'),
'Owner' => array('S' => 'Yifei'),
'Age' => array('N' => '11'),
'Weight' => array('N' => '20')
)

23. Faster, but
only operates
on keys
Query Scan

24. Puppies Kittens Old dogs Old cats Hefty cats
Age LT 1 Age GT 10 Species EQ Cat
AND Species IN [Cat, Dog] AND Species IN [Cat, Dog] Weight GT 20

26. No,
endforeach
Yes, send more
ScanIterator Yield results

27. Simple Iterator
$tables = $db->getIterator('ListTables', array(
'Limit' => 25
));
foreach ($tables as $table) {
echo $table . PHP_EOL;
}

28. Scan Iterators – Example
$youngPets = $db->getIterator('Scan', array(
'TableName' => 'Pets',
'ScanFilter' => array(
'species' => array(
'AttributeValueList' => array(array('S' => 'Dog'),
array('S' => 'Cat')),
'ComparisonOperator' => 'IN'
),
'age' => array(
'AttributeValueList' => array(array('N' => '1'),
'ComparisonOperator' => 'LT'
)
)
));

29. Scan Iterators – Combining and Iterating
$atRiskPets = new AppendIterator();
$atRiskPets->append($youngPets);
$atRiskPets->append($oldPets);
$atRiskPets->append($heftyCats);
foreach ($atRiskPets as $pet) {
echo "Vaccinate {$pet['Name']['S']}.n";
// @TODO Create an appointment
}

30. Demo: Iterators

32. $client->addSubscriber(new CommandAnnouncerListener());

33. Events – Example Plugin
class CommandAnnouncerListener implements
EventSubscriberInterface
{
public static function getSubscribedEvents() {
return array('command.before_send' => array(
'onCommandBeforeSend')
);
}
public function onCommandBeforeSend(Event $event) {
$commandName = $event['command']->getName();
echo "Executing the {$commandName} operation.n";
}
}

34. Demo: Iterators

36. Part 3: Vaccinate
Push the bits!

37. Batch System

38. (Strategy Pattern)

39. (Decorator Pattern)

40. (Builder Pattern)

42. DynamoDB WriteRequestBatch – Usage
$batch = WriteRequestBatch::factory($db);
foreach ($atRiskPets as $pet) {
$pet['date'] = array('S' => date('Ymd'));
$batch->add($db->getCommand('PutItem', array(
'TableName' => 'Appointments',
'Item' => $pet
)));
}
$batch->flush();

44. Demo: Batching

47. $iterator = $db->getIterator('Scan', array([…]));
$batch = WriteRequestBatch::factory($db);
foreach ($iterator as $pet) {
$batch->add($db->getCommand('PutItem', array(
'TableName' => 'Appointments',
'Item' => $pet
)));
}
$batch->flush();

49. We are sincerely eager to #reinvent
hear your feedback on this
presentation and on re:Invent.
Please fill out an evaluation
form when you have a
chance.