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<?php
/*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\DBAL\Sharding\SQLAzure;
use Doctrine\DBAL\Schema\Schema;
use Doctrine\DBAL\Connection;
use Doctrine\DBAL\Types\Type;
use Doctrine\DBAL\Schema\Synchronizer\AbstractSchemaSynchronizer;
use Doctrine\DBAL\Schema\Synchronizer\SingleDatabaseSynchronizer;
use Doctrine\DBAL\Schema\Synchronizer\SchemaSynchronizer;
/**
* SQL Azure Schema Synchronizer.
*
* Will iterate over all shards when performing schema operations. This is done
* by partitioning the passed schema into subschemas for the federation and the
* global database and then applying the operations step by step using the
* {@see \Doctrine\DBAL\Schema\Synchronizer\SingleDatabaseSynchronizer}.
*
* @author Benjamin Eberlei <kontakt@beberlei.de>
*/
class SQLAzureFederationsSynchronizer extends AbstractSchemaSynchronizer
{
const FEDERATION_TABLE_FEDERATED = 'azure.federated';
const FEDERATION_DISTRIBUTION_NAME = 'azure.federatedOnDistributionName';
/**
* @var \Doctrine\DBAL\Sharding\SQLAzure\SQLAzureShardManager
*/
private $shardManager;
/**
* @var \Doctrine\DBAL\Schema\Synchronizer\SchemaSynchronizer
*/
private $synchronizer;
/**
* @param \Doctrine\DBAL\Connection $conn
* @param \Doctrine\DBAL\Sharding\SQLAzure\SQLAzureShardManager $shardManager
* @param \Doctrine\DBAL\Schema\Synchronizer\SchemaSynchronizer|null $sync
*/
public function __construct(Connection $conn, SQLAzureShardManager $shardManager, SchemaSynchronizer $sync = null)
{
parent::__construct($conn);
$this->shardManager = $shardManager;
$this->synchronizer = $sync ?: new SingleDatabaseSynchronizer($conn);
}
/**
* {@inheritdoc}
*/
public function getCreateSchema(Schema $createSchema)
{
$sql = array();
list($global, $federation) = $this->partitionSchema($createSchema);
$globalSql = $this->synchronizer->getCreateSchema($global);
if ($globalSql) {
$sql[] = "-- Create Root Federation\n" .
"USE FEDERATION ROOT WITH RESET;";
$sql = array_merge($sql, $globalSql);
}
$federationSql = $this->synchronizer->getCreateSchema($federation);
if ($federationSql) {
$defaultValue = $this->getFederationTypeDefaultValue();
$sql[] = $this->getCreateFederationStatement();
$sql[] = "USE FEDERATION " . $this->shardManager->getFederationName() . " (" . $this->shardManager->getDistributionKey() . " = " . $defaultValue . ") WITH RESET, FILTERING = OFF;";
$sql = array_merge($sql, $federationSql);
}
return $sql;
}
/**
* {@inheritdoc}
*/
public function getUpdateSchema(Schema $toSchema, $noDrops = false)
{
return $this->work($toSchema, function ($synchronizer, $schema) use ($noDrops) {
return $synchronizer->getUpdateSchema($schema, $noDrops);
});
}
/**
* {@inheritdoc}
*/
public function getDropSchema(Schema $dropSchema)
{
return $this->work($dropSchema, function ($synchronizer, $schema) {
return $synchronizer->getDropSchema($schema);
});
}
/**
* {@inheritdoc}
*/
public function createSchema(Schema $createSchema)
{
$this->processSql($this->getCreateSchema($createSchema));
}
/**
* {@inheritdoc}
*/
public function updateSchema(Schema $toSchema, $noDrops = false)
{
$this->processSql($this->getUpdateSchema($toSchema, $noDrops));
}
/**
* {@inheritdoc}
*/
public function dropSchema(Schema $dropSchema)
{
$this->processSqlSafely($this->getDropSchema($dropSchema));
}
/**
* {@inheritdoc}
*/
public function getDropAllSchema()
{
$this->shardManager->selectGlobal();
$globalSql = $this->synchronizer->getDropAllSchema();
if ($globalSql) {
$sql[] = "-- Work on Root Federation\nUSE FEDERATION ROOT WITH RESET;";
$sql = array_merge($sql, $globalSql);
}
$shards = $this->shardManager->getShards();
foreach ($shards as $shard) {
$this->shardManager->selectShard($shard['rangeLow']);
$federationSql = $this->synchronizer->getDropAllSchema();
if ($federationSql) {
$sql[] = "-- Work on Federation ID " . $shard['id'] . "\n" .
"USE FEDERATION " . $this->shardManager->getFederationName() . " (" . $this->shardManager->getDistributionKey() . " = " . $shard['rangeLow'].") WITH RESET, FILTERING = OFF;";
$sql = array_merge($sql, $federationSql);
}
}
$sql[] = "USE FEDERATION ROOT WITH RESET;";
$sql[] = "DROP FEDERATION " . $this->shardManager->getFederationName();
return $sql;
}
/**
* {@inheritdoc}
*/
public function dropAllSchema()
{
$this->processSqlSafely($this->getDropAllSchema());
}
/**
* @param \Doctrine\DBAL\Schema\Schema $schema
*
* @return array
*/
private function partitionSchema(Schema $schema)
{
return array(
$this->extractSchemaFederation($schema, false),
$this->extractSchemaFederation($schema, true),
);
}
/**
* @param \Doctrine\DBAL\Schema\Schema $schema
* @param boolean $isFederation
*
* @return \Doctrine\DBAL\Schema\Schema
*
* @throws \RuntimeException
*/
private function extractSchemaFederation(Schema $schema, $isFederation)
{
$partitionedSchema = clone $schema;
foreach ($partitionedSchema->getTables() as $table) {
if ($isFederation) {
$table->addOption(self::FEDERATION_DISTRIBUTION_NAME, $this->shardManager->getDistributionKey());
}
if ($table->hasOption(self::FEDERATION_TABLE_FEDERATED) !== $isFederation) {
$partitionedSchema->dropTable($table->getName());
} else {
foreach ($table->getForeignKeys() as $fk) {
$foreignTable = $schema->getTable($fk->getForeignTableName());
if ($foreignTable->hasOption(self::FEDERATION_TABLE_FEDERATED) !== $isFederation) {
throw new \RuntimeException("Cannot have foreign key between global/federation.");
}
}
}
}
return $partitionedSchema;
}
/**
* Work on the Global/Federation based on currently existing shards and
* perform the given operation on the underlying schema synchronizer given
* the different partitioned schema instances.
*
* @param \Doctrine\DBAL\Schema\Schema $schema
* @param \Closure $operation
*
* @return array
*/
private function work(Schema $schema, \Closure $operation)
{
list($global, $federation) = $this->partitionSchema($schema);
$sql = array();
$this->shardManager->selectGlobal();
$globalSql = $operation($this->synchronizer, $global);
if ($globalSql) {
$sql[] = "-- Work on Root Federation\nUSE FEDERATION ROOT WITH RESET;";
$sql = array_merge($sql, $globalSql);
}
$shards = $this->shardManager->getShards();
foreach ($shards as $shard) {
$this->shardManager->selectShard($shard['rangeLow']);
$federationSql = $operation($this->synchronizer, $federation);
if ($federationSql) {
$sql[] = "-- Work on Federation ID " . $shard['id'] . "\n" .
"USE FEDERATION " . $this->shardManager->getFederationName() . " (" . $this->shardManager->getDistributionKey() . " = " . $shard['rangeLow'].") WITH RESET, FILTERING = OFF;";
$sql = array_merge($sql, $federationSql);
}
}
return $sql;
}
/**
* @return string
*/
private function getFederationTypeDefaultValue()
{
$federationType = Type::getType($this->shardManager->getDistributionType());
switch ($federationType->getName()) {
case Type::GUID:
$defaultValue = '00000000-0000-0000-0000-000000000000';
break;
case Type::INTEGER:
case Type::SMALLINT:
case Type::BIGINT:
$defaultValue = '0';
break;
default:
$defaultValue = '';
break;
}
return $defaultValue;
}
/**
* @return string
*/
private function getCreateFederationStatement()
{
$federationType = Type::getType($this->shardManager->getDistributionType());
$federationTypeSql = $federationType->getSqlDeclaration(array(), $this->conn->getDatabasePlatform());
return "--Create Federation\n" .
"CREATE FEDERATION " . $this->shardManager->getFederationName() . " (" . $this->shardManager->getDistributionKey() . " " . $federationTypeSql ." RANGE)";
}
}