/**
* Return the context formated for DynamoDB
* @return array
*/
public function getForDynamoDB()
{
$parameters = array();
foreach ($this->keysByTable as $table => $keys) {
$parameters[$table] = array('Keys' => array());
foreach ($keys as $key) {
list($hash, $range) = $key;
$formatedKey = array();
// Convert to attribute
$hash = new Attribute($hash);
$formatedKey['HashKeyElement'] = $hash->getForDynamoDB();
// Range key
if (null !== $range) {
$range = new Attribute($range);
$formatedKey['RangeKeyElement'] = $range->getForDynamoDB();
}
$parameters[$table]['Keys'][] = $formatedKey;
}
if (isset($this->attributesToGetByTable[$table])) {
$parameters[$table]['AttributesToGet'] = $this->attributesToGetByTable[$table];
}
}
return array('RequestItems' => $parameters);
}
/**
* Return the context formated for DynamoDB
* @return array
*/
public function getForDynamoDB()
{
$parameters = array();
// Items to put
foreach ($this->itemsToPut as $item) {
/** @var $item \Riverline\DynamoDB\Item */
if (!isset($parameters[$item->getTable()])) {
$parameters[$item->getTable()] = array();
}
$attributes = array();
foreach ($item as $name => $attribute) {
/** @var $attribute \Riverline\DynamoDB\Attribute */
if ("" !== $attribute->getValue()) {
// Only not empty string
$attributes[$name] = $attribute->getForDynamoDB();
}
}
$parameters[$item->getTable()][] = array('PutRequest' => array('Item' => $attributes));
}
// Keys to delete
foreach ($this->keysToDelete as $key) {
list($table, $hash, $range) = $key;
if (!isset($parameters[$table])) {
$parameters[$table] = array();
}
$hash = new Attribute($hash);
$key = array('HashKeyElement' => $hash->getForDynamoDB());
if (!is_null($range)) {
$range = new Attribute($range);
$key['RangeKeyElement'] = $range->getForDynamoDB();
}
$parameters[$table][] = array('DeleteRequest' => array('Key' => $key));
}
return array('RequestItems' => $parameters);
}
/**
* Get items via the query call
* @param string $table The item table
* @param mixed $hash The primary hash key
* @param Context\Query|null $context The call context
* @return Collection
*/
public function query($table, $hash, Context\Query $context = null)
{
if (null !== $this->logger) {
$this->log('Query on table ' . $table);
}
$hash = new Attribute($hash);
$parameters = array('TableName' => $table, 'HashKeyValue' => $hash->getForDynamoDB());
if (null !== $context) {
$parameters += $context->getForDynamoDB();
}
if (null !== $this->logger) {
$this->log('Query request paramaters : ' . print_r($parameters, true), Logger::DEBUG);
}
$response = $this->connector->query($parameters);
if (null !== $this->logger) {
$this->log('Query request response : ' . print_r($response, true), Logger::DEBUG);
}
$this->addConsumedReadUnits($table, floatval($response['ConsumedCapacityUnits']));
if (isset($response['LastEvaluatedKey'])) {
if (null === $context) {
$nextContext = new Context\Query();
} else {
$nextContext = clone $context;
}
$nextContext->setExclusiveStartKey($response['LastEvaluatedKey']);
if (null !== $this->logger) {
$this->log('More Items to retrieve');
}
} else {
$nextContext = null;
}
$items = new Collection($nextContext, $response['Count']);
if (!empty($response['Items'])) {
foreach ($response['Items'] as $responseItem) {
$item = new Item($table);
$item->populateFromDynamoDB($responseItem);
$items->add($item);
}
}
if (null !== $this->logger) {
$this->log('Find ' . count($items) . ' Items');
}
return $items;
}
