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<?php |
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namespace Gielfeldt\TransactionalPHP; |
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/** |
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* Class Connection |
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* |
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* @package Gielfeldt\TransactionalPHP |
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*/ |
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class Connection |
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{ |
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/** |
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* @var Operation[] |
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*/ |
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protected $operations = []; |
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/** |
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* @var int |
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*/ |
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protected $idx = 0; |
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/** |
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* @var int[] |
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*/ |
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protected $savePoints = []; |
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/** |
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* @var int |
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*/ |
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protected $depth = 0; |
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/** |
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* @var null|string |
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*/ |
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protected $connectionId; |
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/** |
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* Connection constructor. |
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* |
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* @param null|string $connectionId |
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* (optional) The id of the connection. |
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*/ |
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public function __construct($connectionId = null) |
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{ |
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$this->connectionId = isset($connectionId) ? $connectionId : uniqid(); |
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} |
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/** |
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* Get connection id. |
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* |
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* @return null|string |
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*/ |
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public function connectionId() |
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{ |
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return $this->connectionId; |
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} |
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/** |
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* Remove savepoints to and acquire index of latest active savepoint. |
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* |
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* @param int $oldDepth |
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* The old depth. |
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* @param $newDepth |
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* The new depth. |
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* |
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* @return int|null |
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* The last index, if found. |
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*/ |
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public function closeSavepoints($oldDepth, $newDepth) |
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{ |
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$idx = null; |
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for ($depth = $this->depth + 1; $depth <= $oldDepth; $depth++) { |
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if (isset($this->savePoints[$depth])) { |
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$idx = isset($idx) ? $idx : $this->savePoints[$depth]; |
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unset($this->savePoints[$depth]); |
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} |
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} |
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return $idx; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function startTransaction($newDepth = null) |
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{ |
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$this->depth = isset($newDepth) ? $newDepth : $this->depth + 1; |
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$this->savePoints[$this->depth] = $this->idx; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function commitTransaction($newDepth = null) |
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{ |
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$oldDepth = $this->depth; |
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$this->depth = isset($newDepth) ? $newDepth : $oldDepth - 1; |
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if ($this->depth < 0) { |
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throw new \RuntimeException('Trying to commit non-existant transaction.'); |
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} |
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// Remove savepoints to and acquire index of latest active savepoint. |
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$idx = $this->closeSavepoints($oldDepth, $this->depth); |
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// Is this a real commit. |
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if ($this->depth == 0 && isset($idx)) { |
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// Perform the operations if any found. |
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end($this->operations); |
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$lastIdx = key($this->operations); |
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for ($removeIdx = $idx; $removeIdx <= $lastIdx; $removeIdx++) { |
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$this->performOperation($removeIdx); |
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$this->removeOperation($removeIdx); |
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} |
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$this->idx = $idx; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function rollbackTransaction($newDepth = null) |
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{ |
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$oldDepth = $this->depth; |
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$this->depth = isset($newDepth) ? $newDepth : $oldDepth - 1; |
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if ($this->depth < 0) { |
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throw new \RuntimeException('Trying to rollback non-existant transaction.'); |
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} |
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// Remove savepoints to and acquire index of latest active savepoint. |
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$idx = $this->closeSavepoints($oldDepth, $this->depth); |
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// Remove operations up until latest active savepoint. |
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if (isset($idx)) { |
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end($this->operations); |
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$lastIdx = key($this->operations); |
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for ($removeIdx = $idx; $removeIdx <= $lastIdx; $removeIdx++) { |
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$this->removeOperation($removeIdx); |
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} |
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reset($this->operations); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function addOperation(Operation $operation) |
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{ |
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if ($this->depth <= 0) { |
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return $operation->execute(); |
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} |
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$idx = $this->idx; |
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$this->idx++; |
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$this->operations[$idx] = $operation; |
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$operation->setId($this, $idx); |
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return $idx; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getOperation($idx) |
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{ |
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return isset($this->operations[$idx]) ? $this->operations[$idx] : false; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function performOperation($idx) |
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{ |
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return isset($this->operations[$idx]) ? $this->operations[$idx]->execute() : null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function removeOperation($idx) |
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{ |
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unset($this->operations[$idx]); |
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} |
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} |
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gielfeldt /
transactionalphp
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.