welcome back to dyb-tech
This commit is contained in:
Daniel Guzman
+169
@@ -0,0 +1,169 @@
|
||||
<?php
|
||||
|
||||
namespace Doctrine\DBAL\Id;
|
||||
|
||||
use Doctrine\DBAL\Connection;
|
||||
use Doctrine\DBAL\Driver;
|
||||
use Doctrine\DBAL\DriverManager;
|
||||
use Doctrine\DBAL\Exception;
|
||||
use Doctrine\Deprecations\Deprecation;
|
||||
use Throwable;
|
||||
|
||||
use function array_change_key_case;
|
||||
use function assert;
|
||||
use function is_int;
|
||||
|
||||
use const CASE_LOWER;
|
||||
|
||||
/**
|
||||
* Table ID Generator for those poor languages that are missing sequences.
|
||||
*
|
||||
* WARNING: The Table Id Generator clones a second independent database
|
||||
* connection to work correctly. This means using the generator requests that
|
||||
* generate IDs will have two open database connections. This is necessary to
|
||||
* be safe from transaction failures in the main connection. Make sure to only
|
||||
* ever use one TableGenerator otherwise you end up with many connections.
|
||||
*
|
||||
* TableID Generator does not work with SQLite.
|
||||
*
|
||||
* The TableGenerator does not take care of creating the SQL Table itself. You
|
||||
* should look at the `TableGeneratorSchemaVisitor` to do this for you.
|
||||
* Otherwise the schema for a table looks like:
|
||||
*
|
||||
* CREATE sequences (
|
||||
* sequence_name VARCHAR(255) NOT NULL,
|
||||
* sequence_value INT NOT NULL DEFAULT 1,
|
||||
* sequence_increment_by INT NOT NULL DEFAULT 1,
|
||||
* PRIMARY KEY (sequence_name)
|
||||
* );
|
||||
*
|
||||
* Technically this generator works as follows:
|
||||
*
|
||||
* 1. Use a robust transaction serialization level.
|
||||
* 2. Open transaction
|
||||
* 3. Acquire a read lock on the table row (SELECT .. FOR UPDATE)
|
||||
* 4. Increment current value by one and write back to database
|
||||
* 5. Commit transaction
|
||||
*
|
||||
* If you are using a sequence_increment_by value that is larger than one the
|
||||
* ID Generator will keep incrementing values until it hits the incrementation
|
||||
* gap before issuing another query.
|
||||
*
|
||||
* If no row is present for a given sequence a new one will be created with the
|
||||
* default values 'value' = 1 and 'increment_by' = 1
|
||||
*
|
||||
* @deprecated
|
||||
*/
|
||||
class TableGenerator
|
||||
{
|
||||
private Connection $conn;
|
||||
|
||||
/** @var string */
|
||||
private $generatorTableName;
|
||||
|
||||
/** @var mixed[][] */
|
||||
private array $sequences = [];
|
||||
|
||||
/**
|
||||
* @param string $generatorTableName
|
||||
*
|
||||
* @throws Exception
|
||||
*/
|
||||
public function __construct(Connection $conn, $generatorTableName = 'sequences')
|
||||
{
|
||||
Deprecation::trigger(
|
||||
'doctrine/dbal',
|
||||
'https://github.com/doctrine/dbal/pull/4681',
|
||||
'The TableGenerator class is is deprecated.',
|
||||
);
|
||||
|
||||
if ($conn->getDriver() instanceof Driver\PDO\SQLite\Driver) {
|
||||
throw new Exception('Cannot use TableGenerator with SQLite.');
|
||||
}
|
||||
|
||||
$this->conn = DriverManager::getConnection(
|
||||
$conn->getParams(),
|
||||
$conn->getConfiguration(),
|
||||
$conn->getEventManager(),
|
||||
);
|
||||
|
||||
$this->generatorTableName = $generatorTableName;
|
||||
}
|
||||
|
||||
/**
|
||||
* Generates the next unused value for the given sequence name.
|
||||
*
|
||||
* @param string $sequence
|
||||
*
|
||||
* @return int
|
||||
*
|
||||
* @throws Exception
|
||||
*/
|
||||
public function nextValue($sequence)
|
||||
{
|
||||
if (isset($this->sequences[$sequence])) {
|
||||
$value = $this->sequences[$sequence]['value'];
|
||||
$this->sequences[$sequence]['value']++;
|
||||
if ($this->sequences[$sequence]['value'] >= $this->sequences[$sequence]['max']) {
|
||||
unset($this->sequences[$sequence]);
|
||||
}
|
||||
|
||||
return $value;
|
||||
}
|
||||
|
||||
$this->conn->beginTransaction();
|
||||
|
||||
try {
|
||||
$row = $this->conn->createQueryBuilder()
|
||||
->select('sequence_value', 'sequence_increment_by')
|
||||
->from($this->generatorTableName)
|
||||
->where('sequence_name = ?')
|
||||
->forUpdate()
|
||||
->setParameter(1, $sequence)
|
||||
->fetchAssociative();
|
||||
|
||||
if ($row !== false) {
|
||||
$row = array_change_key_case($row, CASE_LOWER);
|
||||
|
||||
$value = $row['sequence_value'];
|
||||
$value++;
|
||||
|
||||
assert(is_int($value));
|
||||
|
||||
if ($row['sequence_increment_by'] > 1) {
|
||||
$this->sequences[$sequence] = [
|
||||
'value' => $value,
|
||||
'max' => $row['sequence_value'] + $row['sequence_increment_by'],
|
||||
];
|
||||
}
|
||||
|
||||
$sql = 'UPDATE ' . $this->generatorTableName . ' ' .
|
||||
'SET sequence_value = sequence_value + sequence_increment_by ' .
|
||||
'WHERE sequence_name = ? AND sequence_value = ?';
|
||||
$rows = $this->conn->executeStatement($sql, [$sequence, $row['sequence_value']]);
|
||||
|
||||
if ($rows !== 1) {
|
||||
throw new Exception('Race-condition detected while updating sequence. Aborting generation');
|
||||
}
|
||||
} else {
|
||||
$this->conn->insert(
|
||||
$this->generatorTableName,
|
||||
['sequence_name' => $sequence, 'sequence_value' => 1, 'sequence_increment_by' => 1],
|
||||
);
|
||||
$value = 1;
|
||||
}
|
||||
|
||||
$this->conn->commit();
|
||||
} catch (Throwable $e) {
|
||||
$this->conn->rollBack();
|
||||
|
||||
throw new Exception(
|
||||
'Error occurred while generating ID with TableGenerator, aborted generation: ' . $e->getMessage(),
|
||||
0,
|
||||
$e,
|
||||
);
|
||||
}
|
||||
|
||||
return $value;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,77 @@
|
||||
<?php
|
||||
|
||||
namespace Doctrine\DBAL\Id;
|
||||
|
||||
use Doctrine\DBAL\Schema\Column;
|
||||
use Doctrine\DBAL\Schema\ForeignKeyConstraint;
|
||||
use Doctrine\DBAL\Schema\Index;
|
||||
use Doctrine\DBAL\Schema\Schema;
|
||||
use Doctrine\DBAL\Schema\Sequence;
|
||||
use Doctrine\DBAL\Schema\Table;
|
||||
use Doctrine\DBAL\Schema\Visitor\Visitor;
|
||||
use Doctrine\Deprecations\Deprecation;
|
||||
|
||||
/** @deprecated */
|
||||
class TableGeneratorSchemaVisitor implements Visitor
|
||||
{
|
||||
/** @var string */
|
||||
private $generatorTableName;
|
||||
|
||||
/** @param string $generatorTableName */
|
||||
public function __construct($generatorTableName = 'sequences')
|
||||
{
|
||||
Deprecation::trigger(
|
||||
'doctrine/dbal',
|
||||
'https://github.com/doctrine/dbal/pull/4681',
|
||||
'The TableGeneratorSchemaVisitor class is is deprecated.',
|
||||
);
|
||||
|
||||
$this->generatorTableName = $generatorTableName;
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
public function acceptSchema(Schema $schema)
|
||||
{
|
||||
$table = $schema->createTable($this->generatorTableName);
|
||||
$table->addColumn('sequence_name', 'string');
|
||||
$table->addColumn('sequence_value', 'integer', ['default' => 1]);
|
||||
$table->addColumn('sequence_increment_by', 'integer', ['default' => 1]);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
public function acceptTable(Table $table)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
public function acceptColumn(Table $table, Column $column)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
public function acceptForeignKey(Table $localTable, ForeignKeyConstraint $fkConstraint)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
public function acceptIndex(Table $table, Index $index)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
public function acceptSequence(Sequence $sequence)
|
||||
{
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user