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<?php |
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namespace Kaliop\eZWorkflowEngineBundle\Core\StorageHandler\Database; |
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use Kaliop\eZMigrationBundle\Core\StorageHandler\Database\Migration as StorageMigration; |
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use Kaliop\eZMigrationBundle\API\Value\Migration; |
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use Kaliop\eZMigrationBundle\API\Value\MigrationDefinition; |
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use Kaliop\eZMigrationBundle\API\ConfigResolverInterface; |
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use Kaliop\eZWorkflowEngineBundle\API\Value\Workflow as APIWorkflow; |
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use eZ\Publish\Core\Persistence\Database\DatabaseHandler; |
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use Doctrine\DBAL\Exception\UniqueConstraintViolationException; |
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use Doctrine\DBAL\Schema\Schema; |
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/** |
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* @todo add methods aliases using 'Workflow' in place of 'Migration' |
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*/ |
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class Workflow extends StorageMigration |
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{ |
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protected $fieldList = 'migration, md5, path, execution_date, status, execution_error, signal_name'; |
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/** |
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* @param DatabaseHandler $dbHandler |
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* @param string $tableNameParameter |
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* @param ConfigResolverInterface $configResolver |
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* @throws \Exception |
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*/ |
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public function __construct(DatabaseHandler $dbHandler, $tableNameParameter = 'kaliop_workflows', ConfigResolverInterface $configResolver = null) |
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{ |
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parent::__construct($dbHandler, $tableNameParameter, $configResolver); |
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} |
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/** |
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* @param MigrationDefinition $migrationDefinition |
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* @return APIWorkflow |
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* @throws \Exception |
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*/ |
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public function addMigration(MigrationDefinition $migrationDefinition) |
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{ |
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throw new \Exception("Can not add workflows to the database if not when starting them"); |
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} |
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/// @todo should we handle $force ? Or maybe throw if it is not false... |
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protected function createMigration(MigrationDefinition $migrationDefinition, $status, $action, $force = false) |
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{ |
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$this->createTableIfNeeded(); |
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$workflowName = $this->getWorkflowName($migrationDefinition->name); |
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// select for update |
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// annoyingly enough, neither Doctrine nor EZP provide built in support for 'FOR UPDATE' in their query builders... |
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// at least the doctrine one allows us to still use parameter binding when we add our sql particle |
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$conn = $this->dbHandler->getConnection(); |
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$qb = $conn->createQueryBuilder(); |
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$qb->select('*') |
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->from($this->tableName, 'm') |
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->where('migration = ?'); |
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$sql = $qb->getSQL() . ' FOR UPDATE'; |
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$conn->beginTransaction(); |
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$stmt = $conn->executeQuery($sql, array($workflowName)); |
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$existingMigrationData = $stmt->fetch(\PDO::FETCH_ASSOC); |
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if (is_array($existingMigrationData)) { |
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// workflow exists - start it |
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$workflowName = $existingMigrationData['name']; |
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// fail if it was already executing or already done |
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if ($existingMigrationData['status'] == Migration::STATUS_STARTED) { |
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// commit to release the lock |
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$conn->commit(); |
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throw new \Exception("Workflow '{$migrationDefinition->name}' can not be $action as it is already executing"); |
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} |
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if ($existingMigrationData['status'] == Migration::STATUS_DONE) { |
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// commit to release the lock |
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$conn->commit(); |
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throw new \Exception("Workflow '{$migrationDefinition->name}' can not be $action as it was already executed"); |
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} |
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if ($existingMigrationData['status'] == Migration::STATUS_SKIPPED) { |
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// commit to release the lock |
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$conn->commit(); |
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throw new \Exception("Workflow '{$migrationDefinition->name}' can not be $action as it was already skipped"); |
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} |
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// do not set migration start date if we are skipping it |
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$migration = new APIWorkflow( |
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$workflowName, |
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md5($migrationDefinition->rawDefinition), |
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$migrationDefinition->path, |
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($status == Migration::STATUS_SKIPPED ? null : time()), |
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$status, |
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null, |
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$migrationDefinition->signalName |
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); |
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$conn->update( |
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$this->tableName, |
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array( |
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'execution_date' => $migration->executionDate, |
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'status' => $status, |
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'execution_error' => null |
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), |
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array('migration' => $workflowName) |
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); |
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$conn->commit(); |
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} else { |
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// migration did not exist. Create it! |
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// commit immediately, to release the lock and avoid deadlocks |
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$conn->commit(); |
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$migration = new APIWorkflow( |
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$workflowName, |
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md5($migrationDefinition->rawDefinition), |
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$migrationDefinition->path, |
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($status == Migration::STATUS_SKIPPED ? null : time()), |
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$status, |
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null, |
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$migrationDefinition->signalName |
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); |
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$conn->insert($this->tableName, $this->migrationToArray($migration)); |
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} |
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return $migration; |
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} |
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public function skipMigration(MigrationDefinition $migrationDefinition) |
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{ |
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throw new \Exception("Can not tag workflows in the database as to be skipped"); |
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} |
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public function createTable() |
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{ |
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/** @var \Doctrine\DBAL\Schema\AbstractSchemaManager $sm */ |
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$sm = $this->dbHandler->getConnection()->getSchemaManager(); |
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$dbPlatform = $sm->getDatabasePlatform(); |
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$schema = new Schema(); |
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$t = $schema->createTable($this->tableName); |
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$t->addColumn('migration', 'string', array('length' => 255)); |
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$t->addColumn('path', 'string', array('length' => 4000)); |
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$t->addColumn('md5', 'string', array('length' => 32)); |
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$t->addColumn('execution_date', 'integer', array('notnull' => false)); |
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$t->addColumn('status', 'integer', array('default ' => Migration::STATUS_TODO)); |
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$t->addColumn('execution_error', 'string', array('length' => 4000, 'notnull' => false)); |
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$t->addColumn('signal_name', 'string', array('length' => 4000, 'notnull' => false)); |
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$t->setPrimaryKey(array('migration')); |
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// in case users want to look up migrations by their full path |
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// NB: disabled for the moment, as it causes problems on some versions of mysql which limit index length to 767 bytes, |
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// and 767 bytes can be either 255 chars or 191 chars depending on charset utf8 or utf8mb4... |
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//$t->addIndex(array('path')); |
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/// @todo add support for utf8mb4 charset |
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foreach ($schema->toSql($dbPlatform) as $sql) { |
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$this->dbHandler->exec($sql); |
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} |
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} |
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protected function migrationToArray(Migration $migration) |
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{ |
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return array( |
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'migration' => $migration->name, |
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'md5' => $migration->md5, |
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'path' => $migration->path, |
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'execution_date' => $migration->executionDate, |
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'status' => $migration->status, |
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'execution_error' => $migration->executionError, |
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'signal_name' => $migration->signalName |
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); |
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} |
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protected function arrayToMigration(array $data) |
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{ |
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return new APIWorkflow( |
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$data['migration'], |
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$data['md5'], |
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$data['path'], |
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$data['execution_date'], |
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$data['status'], |
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$data['execution_error'], |
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$data['signal_name'] |
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); |
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} |
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/** |
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* @param string $workflowDefinitionName |
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* @return string currently YYYYMMDDHHmmSSuuu_PID/$workflowDefinitionName |
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* @todo for strict sorting across leap hours we should use unix timestamp |
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* @bug if we have a cluster of servers, we migth hit a pid collision... |
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*/ |
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protected function getWorkflowName($workflowDefinitionName) |
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{ |
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$mtime = explode(' ', microtime()); |
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$time = date('YmdHis', $mtime[1]). substr($mtime[0], 2, 3); |
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return $time . '/' . getmypid() . '/' . $workflowDefinitionName; |
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} |
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} |
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