What's?
DynamoDB-local + PartiQLが可能になったので試しているところ。
コードはSlim4-SkeltonをDynamoDB用に書き換えたもの。
↓リポジトリはこちら
https://github.com/watarukura/php_vscode_project_template
テーブル定義
usersテーブル
$ aws --endpoint http://localhost:8000 dynamodb delete-table --table-name users
TableDescription:
AttributeDefinitions:
- AttributeName: id
AttributeType: N
BillingModeSummary:
BillingMode: PAY_PER_REQUEST
LastUpdateToPayPerRequestDateTime: '2021-02-17T13:02:33.967000+09:00'
CreationDateTime: '2021-02-17T13:02:33.967000+09:00'
ItemCount: 1
KeySchema:
- AttributeName: id
KeyType: HASH
ProvisionedThroughput:
LastDecreaseDateTime: '1970-01-01T09:00:00+09:00'
LastIncreaseDateTime: '1970-01-01T09:00:00+09:00'
NumberOfDecreasesToday: 0
ReadCapacityUnits: 0
WriteCapacityUnits: 0
TableArn: arn:aws:dynamodb:ddblocal:000000000000:table/users
TableName: users
TableSizeBytes: 66
TableStatus: ACTIVE
counterテーブル
$ aws --endpoint http://localhost:8000 dynamodb delete-table --table-name counter
TableDescription:
AttributeDefinitions:
- AttributeName: id
AttributeType: S
BillingModeSummary:
BillingMode: PAY_PER_REQUEST
LastUpdateToPayPerRequestDateTime: '2021-02-17T13:02:33.947000+09:00'
CreationDateTime: '2021-02-17T13:02:33.947000+09:00'
ItemCount: 1
KeySchema:
- AttributeName: id
KeyType: HASH
ProvisionedThroughput:
LastDecreaseDateTime: '1970-01-01T09:00:00+09:00'
LastIncreaseDateTime: '1970-01-01T09:00:00+09:00'
NumberOfDecreasesToday: 0
ReadCapacityUnits: 0
WriteCapacityUnits: 0
TableArn: arn:aws:dynamodb:ddblocal:000000000000:table/counter
TableName: counter
TableSizeBytes: 16
TableStatus: ACTIVE
get-item
before
/**
* Get user by the given user id.
*
* @param int $userId The user id
*
* @return UserReaderData The user data
*
* @throws DomainException
* @throws Exception
*/
public function getUserById(int $userId): UserReaderData
{
try {
$marshaler = new Marshaler();
$key = $marshaler->marshalJson((string)json_encode([
'id' => $userId
]));
$row = $this->client->getItem([
'TableName' => 'users',
'Key' => $key,
]);
if (!$row->get('Item')) {
throw new DomainException(sprintf('User not found: %s', $userId));
}
} catch (Exception $exception) {
throw $exception;
}
// Map array to data object
$user = new UserReaderData();
$user->id = (int)$row['Item']['id']['N'];
$user->username = (string)$row['Item']['username']['S'];
$user->first_name = (string)$row['Item']['first_name']['S'];
$user->last_name = (string)$row['Item']['last_name']['S'];
$user->email = (string)$row['Item']['email']['S'];
return $user;
after
/**
* Get user by the given user id.
*
* @param int $userId The user id
*
* @return UserReaderData The user data
*
* @throws DomainException
* @throws Exception
*/
public function getUserById(int $userId): UserReaderData
{
try {
$result = $this->client->executeStatement([
'Parameters' => [
[
'N' => $userId
]
],
'Statement' => 'SELECT * FROM users WHERE id = ?'
]);
$items = $result->get('Items') ?? [];
if (!$items) {
throw new DomainException(sprintf('User not found: %s', $userId));
} else {
$marshaler = new Marshaler();
$result_item = json_decode(
$marshaler->unmarshalJson($items[0]),
true
);
}
} catch (Exception $exception) {
throw $exception;
}
// Map array to data object
$user = new UserReaderData();
$user->id = $result_item['id'];
$user->username = $result_item['user_name'];
$user->first_name = $result_item['first_name'];
$user->last_name = $result_item['last_name'];
$user->email = $result_item['email']
return $user;
}
put-item
before
/**
* Insert user row.
*
* @param UserCreatorData $user The user
*
* @return int The new ID
* @throws Exception
*/
public function insertUser(UserCreatorData $user): int
{
$id = $this->incrementUserId();
try {
$marshaler = new Marshaler();
$item = $marshaler->marshalJson((string)json_encode([
'id' => $id,
'username' => $user->username,
'first_name' => $user->first_name,
'last_name' => $user->last_name,
'email' => $user->email,
]));
$this->client->putItem([
'TableName' => 'users',
'Item' => $item,
]);
} catch (Exception $exception) {
throw $exception;
}
return $id;
}
after
/**
* Insert user row.
*
* @param UserCreatorData $user The user
*
* @return int The new ID
* @throws Exception
*/
public function insertUser(UserCreatorData $user): int
{
$id = $this->incrementUserId();
try {
$this->client->executeStatement([
'Parameters' => [
[
'N' => $id,
],
[
'S' => $user->username,
],
[
'S' => $user->first_name,
],
[
'S' => $user->last_name,
],
[
'S' => $user->email
]
],
'Statement' => "INSERT INTO users
VALUE {
'id': ?,
'user_name': ?,
'first_name': ?,
'last_name': ?,
'email': ?
}"
]);
} catch (Exception $exception) {
throw $exception;
}
return $id;
}
update-item
updateは元ネタがないのでスクラッチ。
/**
* Update user row.
*
* @param UserUpdaterData $userUpdaterData
*
* @return UserUpdaterData The user data
*
* @throws Exception
*/
public function updateUser(UserUpdaterData $userUpdaterData): UserUpdaterData
{
$statement = 'UPDATE users ';
$parameters = [];
foreach ($userUpdaterData->jsonSerialize() as $k => $v) {
if ($k === 'id') {
// TODO: Omit Partition Key
continue;
}
if (is_null($v)) {
continue;
}
$statement .= sprintf('SET %s=? ', $k);
$parameters[] = $marshaler->marshalValue($v);
}
$statement .= ' WHERE id = ? RETURNING ALL NEW *';
$parameters[] = [
'N' => $userUpdaterData->id
];
try {
$result = $this->client->executeStatement([
'Parameters' => $parameters,
'Statement' => $statement
]);
$items = $result->get('Items') ?? [];
if (!$items) {
throw new DomainException(sprintf('User not found: %s', $userUpdaterData->id));
} else {
$marshaler = new Marshaler();
$result_item = json_decode(
$marshaler->unmarshalJson($items[0]),
true
);
}
} catch (Exception $exception) {
throw $exception;
}
return new UserUpdaterData($userUpdaterData->id, $result_item);
}
atomic counter
こちらはbeforeも含めてスクラッチ。
counterテーブルへの初期登録が必要です。
aws --endpoint http://localhost:8000 ddb put counter '{id: "users", counter: 0}'
before
/**
* @return int
* @throws Exception
*/
private function incrementUserId(): int
{
$marshaler = new Marshaler();
$key = $marshaler->marshalItem([
'id' => 'users'
]);
$eav = $marshaler->marshalItem([
':increment' => 1
]);
$ean = [
'#c' => 'counter'
];
$params = [
'TableName' => 'counter',
'Key' => $key,
'UpdateExpression' => 'ADD #c :increment',
'ExpressionAttributeValues' => $eav,
'ExpressionAttributeNames' => $ean,
'ReturnValues' => 'UPDATED_NEW'
try {
$result = $this->client->updateItem($params);
$attr = $result['Attributes'] ?? [];
$counter = json_decode(
$marshaler->unmarshalJson($attr),
true
);
if ($counter) {
return $counter['counter'];
} else {
throw new DomainException(sprintf('Counter not found: %s', 'users'));
} catch (DynamoDbException $exception) {
throw $exception;
}
}
after
/**
* @return int
* @throws Exception
*/
private function incrementUserId(): int
{
$marshaler = new Marshaler();
$statement = 'UPDATE counter '
. 'SET counter = counter + ? '
. 'WHERE id = ? RETURNING ALL NEW *;';
$parameters = [
[
'N' => 1
],
[
'S' => 'users'
]
];
try {
$result = $this->client->executeStatement([
'Parameters' => $parameters,
'Statement' => $statement
]);
$items = $result->get('Items') ?? [];
if (!$items) {
throw new DomainException(sprintf('Counter not found: %s', 'users'));
} else {
$result_item = json_decode(
$marshaler->unmarshalJson($items[0]),
true
);
return $result_item['counter'];
}
} catch (Exception $exception) {
throw $exception;
}
}
感想
Python/Java/Node.jsはNoSQL workbenchでコード生成してくれますが、PHPは生成してくれません。
無念。