src/Objects/RecordSerializer.php
<?php
declare(strict_types=1);
namespace FlixTech\AvroSerializer\Objects;
use AvroSchema;
use FlixTech\SchemaRegistryApi\Exception\SchemaNotFoundException;
use FlixTech\SchemaRegistryApi\Exception\SchemaRegistryException;
use FlixTech\SchemaRegistryApi\Exception\SubjectNotFoundException;
use FlixTech\SchemaRegistryApi\Registry;
use GuzzleHttp\Promise\PromiseInterface;
use const FlixTech\AvroSerializer\Common\get;
use const FlixTech\AvroSerializer\Protocol\PROTOCOL_ACCESSOR_AVRO;
use const FlixTech\AvroSerializer\Protocol\PROTOCOL_ACCESSOR_SCHEMA_ID;
use const FlixTech\AvroSerializer\Protocol\WIRE_FORMAT_PROTOCOL_VERSION;
use const Widmogrod\Functional\identity;
use const Widmogrod\Functional\reThrow;
use function FlixTech\AvroSerializer\Common\memoize;
use function FlixTech\AvroSerializer\Protocol\decode;
use function FlixTech\AvroSerializer\Protocol\encoder;
use function FlixTech\AvroSerializer\Protocol\validator;
use function FlixTech\AvroSerializer\Serialize\avroDatumReader;
use function FlixTech\AvroSerializer\Serialize\avroDatumWriter;
use function Widmogrod\Functional\curryN;
use function Widmogrod\Functional\valueOf;
class RecordSerializer
{
public const OPTION_REGISTER_MISSING_SCHEMAS = 'register_missing_schemas';
public const OPTION_REGISTER_MISSING_SUBJECTS = 'register_missing_subjects';
/**
* @var Registry
*/
protected $registry;
/**
* @var callable
*/
protected $datumWriterFactoryFunc;
/**
* @var callable
*/
protected $datumReaderFactoryFunc;
/**
* @var callable
*/
protected $protocolEncoderFactoryFunc;
/**
* @var callable
*/
protected $schemaIdGetter;
/**
* @var callable
*/
protected $avroBinaryGetter;
/**
* @var bool
*/
protected $registerMissingSchemas;
/**
* @var bool
*/
protected $registerNonExistingSubjects;
/**
* @var callable
*/
protected $protocolValidatorFunc;
/**
* RecordSerializer constructor.
*
* @param array<string,mixed> $options
*
* @throws \AvroIOException
*/
public function __construct(Registry $registry, array $options = [])
{
$this->registry = $registry;
$this->datumWriterFactoryFunc = avroDatumWriter();
$this->datumReaderFactoryFunc = avroDatumReader();
$this->protocolEncoderFactoryFunc = encoder(WIRE_FORMAT_PROTOCOL_VERSION);
$this->protocolValidatorFunc = validator(WIRE_FORMAT_PROTOCOL_VERSION);
$get = curryN(2, get);
$this->schemaIdGetter = $get(PROTOCOL_ACCESSOR_SCHEMA_ID);
$this->avroBinaryGetter = $get(PROTOCOL_ACCESSOR_AVRO);
$this->registerMissingSchemas = isset($options[self::OPTION_REGISTER_MISSING_SCHEMAS])
? (bool) $options[self::OPTION_REGISTER_MISSING_SCHEMAS]
: false;
$this->registerNonExistingSubjects = isset($options[self::OPTION_REGISTER_MISSING_SUBJECTS])
? (bool) $options[self::OPTION_REGISTER_MISSING_SUBJECTS]
: false;
}
/**
* @param mixed $record
*
* @throws \Exception
* @throws \FlixTech\SchemaRegistryApi\Exception\SchemaRegistryException
*/
public function encodeRecord(string $subject, AvroSchema $schema, $record): string
{
$schemaId = $this->getSchemaIdForSchema($subject, $schema);
$cachedWriter = memoize($this->datumWriterFactoryFunc, [$schema], 'writer_' . $schemaId);
return $cachedWriter($record)
->bind(memoize($this->protocolEncoderFactoryFunc, [$schemaId], 'encoder_' . $schemaId))
->either(reThrow, identity);
}
/**
* @return mixed
*
* @throws \InvalidArgumentException
* @throws \Exception
* @throws \FlixTech\SchemaRegistryApi\Exception\SchemaRegistryException
*/
public function decodeMessage(string $binaryMessage, AvroSchema $readersSchema = null)
{
$decoded = decode($binaryMessage);
$schemaId = valueOf($decoded->bind($this->schemaIdGetter));
$writersSchema = $this->extractValueFromRegistryResponse($this->registry->schemaForId($schemaId));
$readersSchema = $readersSchema ?? $writersSchema;
$cachedReader = memoize($this->datumReaderFactoryFunc, [$writersSchema], 'reader_' . $schemaId);
/** @var \Widmogrod\Monad\Maybe\Maybe $validated */
$validated = $decoded->bind($this->protocolValidatorFunc);
/** @var \Widmogrod\Monad\Either\Either $read */
$read = $validated
->orElse(static function () { throw new \InvalidArgumentException('Could not validate message wire protocol.'); })
->bind($this->avroBinaryGetter)
->bind($cachedReader($readersSchema));
return $read->either(reThrow, identity);
}
/**
* @throws \Exception
* @throws \FlixTech\SchemaRegistryApi\Exception\SchemaRegistryException
*/
private function getSchemaIdForSchema(string $subject, AvroSchema $schema): int
{
try {
$schemaId = $this->extractValueFromRegistryResponse($this->registry->schemaId($subject, $schema));
} catch (SchemaRegistryException $e) {
$this->handleSubjectOrSchemaNotFound($e);
$schemaId = $this->extractValueFromRegistryResponse($this->registry->register($subject, $schema));
}
return $schemaId;
}
/**
* @param PromiseInterface|\Exception|\Psr\Http\Message\ResponseInterface $response
*
* @return mixed
*
* @throws \Exception
*/
private function extractValueFromRegistryResponse($response)
{
if ($response instanceof PromiseInterface) {
$response = $response->wait();
}
if ($response instanceof \Exception) {
throw $response;
}
return $response;
}
/**
* @throws \FlixTech\SchemaRegistryApi\Exception\SchemaRegistryException
*/
private function handleSubjectOrSchemaNotFound(SchemaRegistryException $e): void
{
switch (\get_class($e)) {
case SchemaNotFoundException::class:
if (!$this->registerMissingSchemas) {
throw $e;
}
break;
case SubjectNotFoundException::class:
if (!$this->registerNonExistingSubjects) {
throw $e;
}
break;
default:
// @codeCoverageIgnoreStart
throw $e;
// @codeCoverageIgnoreEnd
}
}
}