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<?php |
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namespace LaravelFreelancerNL\Aranguent\Concerns; |
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use ArangoDBClient\StreamingTransaction; |
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use ArangoDBClient\TransactionBase; |
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use Closure; |
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use Throwable; |
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trait ManagesTransactions |
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{ |
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protected $transactions = 0; |
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protected $arangoTransaction; |
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/** |
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* Execute a Closure within a transaction. |
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* |
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* @param \Closure $callback |
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* @param int $attempts |
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* @param array $collections |
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* @return mixed |
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* |
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* @throws Throwable |
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*/ |
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public function transaction(Closure $callback, $attempts = 1, $collections = []) |
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{ |
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for ($currentAttempt = 1; $currentAttempt <= $attempts; $currentAttempt++) { |
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$this->beginTransaction($collections); |
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// We'll simply execute the given callback within a try / catch block and if we |
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// catch any exception we can rollback this transaction so that none of this |
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// gets actually persisted to a database or stored in a permanent fashion. |
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try { |
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$callbackResult = $callback($this); |
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} catch (Throwable $e) { |
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// If we catch an exception we'll rollback this transaction and try again if we |
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// are not out of attempts. If we are out of attempts we will just throw the |
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// exception back out and let the developer handle an uncaught exceptions. |
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$this->handleTransactionException( |
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$e, |
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$currentAttempt, |
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$attempts |
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); |
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continue; |
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} |
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try { |
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if ($this->transactions == 1) { |
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$this->commitArangoTransaction(); |
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} |
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$this->transactions = max(0, $this->transactions - 1); |
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} catch (Throwable $e) { |
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$this->handleCommitTransactionException( |
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$e, |
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$currentAttempt, |
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$attempts |
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); |
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continue; |
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} |
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$this->fireConnectionEvent('committed'); |
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return $callbackResult; |
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} |
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} |
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/** |
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* Start a new database transaction. |
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* |
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* @param array $collections |
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* @return void |
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* |
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* @throws Throwable |
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*/ |
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public function beginTransaction($collections = []) |
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{ |
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$this->createTransaction($collections); |
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$this->transactions++; |
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$this->fireConnectionEvent('beganTransaction'); |
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} |
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/** |
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* Create a transaction within the database. |
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* |
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* @param array $collections |
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* @return void |
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* |
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*/ |
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protected function createTransaction($collections = []) |
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{ |
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if ($this->transactions == 0) { |
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$this->reconnectIfMissingConnection(); |
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try { |
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$this->beginArangoTransaction($collections); |
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} catch (Throwable $e) { |
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$this->handleBeginTransactionException($e); |
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} |
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} |
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} |
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protected function beginArangoTransaction($collections = []) |
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{ |
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$transactionHandler = $this->getTransactionHandler(); |
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$this->arangoTransaction = new StreamingTransaction($this->getArangoConnection(), [ |
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TransactionBase::ENTRY_COLLECTIONS => $collections |
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]); |
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$this->arangoTransaction = $transactionHandler->create($this->arangoTransaction); |
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} |
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/** |
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* Commit the active database transaction. |
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* |
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* @return void |
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* |
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* @throws Throwable |
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*/ |
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3 |
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public function commit() |
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{ |
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if ($this->transactions == 1) { |
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$this->commitArangoTransaction(); |
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} |
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$this->transactions = max(0, $this->transactions - 1); |
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$this->fireConnectionEvent('committed'); |
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} |
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/** |
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* Commit the transaction through the ArangoDB driver. |
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*/ |
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3 |
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protected function commitArangoTransaction() |
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{ |
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$transactionHandler = $this->getTransactionHandler(); |
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$transactionHandler->commit($this->arangoTransaction); |
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3 |
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$this->arangoTransaction = null; |
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3 |
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} |
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/** |
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* Perform a rollback within the database. |
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* |
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* @param int $toLevel |
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* @return void |
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* |
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* @throws \Throwable |
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*/ |
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1 |
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protected function performRollBack($toLevel) |
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{ |
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1 |
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if ($toLevel == 0) { |
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$transactionHandler = $this->getTransactionHandler(); |
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$transactionHandler->abort($this->arangoTransaction); |
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$this->arangoTransaction = null; |
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} |
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1 |
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} |
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167
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2 |
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public function getArangoTransaction() |
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168
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{ |
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169
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2 |
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return $this->arangoTransaction; |
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170
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} |
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171
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} |
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172
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LaravelFreelancerNL /
laravel-arangodb
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