3 +--------------------------------------------------------------------+
4 | CiviCRM version 4.7 |
5 +--------------------------------------------------------------------+
6 | Copyright CiviCRM LLC (c) 2004-2016 |
7 +--------------------------------------------------------------------+
8 | This file is a part of CiviCRM. |
10 | CiviCRM is free software; you can copy, modify, and distribute it |
11 | under the terms of the GNU Affero General Public License |
12 | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
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15 | WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | See the GNU Affero General Public License for more details. |
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24 | see the CiviCRM license FAQ at http://civicrm.org/licensing |
25 +--------------------------------------------------------------------+
28 namespace Civi\API\Subscriber
;
31 use Symfony\Component\EventDispatcher\EventSubscriberInterface
;
34 * Class TransactionSubscriber
36 * Implement transaction management for API calls. Two API options are accepted:
37 * - is_transactional: bool|'nest' - if true, then all work is done inside a
38 * transaction. By default, true for mutator actions (C-UD). 'nest' will
39 * force creation of a nested transaction; otherwise, the default is to
40 * re-use any existing transactions.
41 * - options.force_rollback: bool - if true, all work is done in a nested
42 * transaction which will be rolled back.
44 * @package Civi\API\Subscriber
46 class TransactionSubscriber
implements EventSubscriberInterface
{
50 public static function getSubscribedEvents() {
52 Events
::PREPARE
=> array('onApiPrepare', Events
::W_EARLY
),
53 Events
::RESPOND
=> array('onApiRespond', Events
::W_MIDDLE
),
54 Events
::EXCEPTION
=> array('onApiException', Events
::W_EARLY
),
59 * @var array (scalar $apiRequestId => CRM_Core_Transaction $tx)
61 private $transactions = array();
64 * @var array (scalar $apiRequestId => bool)
66 * A list of requests which should be forcibly rolled back to
69 private $forceRollback = array();
72 * Determine if an API request should be treated as transactional.
74 * @param \Civi\API\Provider\ProviderInterface $apiProvider
75 * The API provider responsible for this request.
76 * @param array $apiRequest
77 * The full API request.
80 public function isTransactional($apiProvider, $apiRequest) {
81 if ($this->isForceRollback($apiProvider, $apiRequest)) {
84 if (isset($apiRequest['params']['is_transactional'])) {
85 return \CRM_Utils_String
::strtobool($apiRequest['params']['is_transactional']) ||
$apiRequest['params']['is_transactional'] == 'nest';
87 return strtolower($apiRequest['action']) == 'create' ||
strtolower($apiRequest['action']) == 'delete' ||
strtolower($apiRequest['action']) == 'submit';
91 * Determine if caller wants us to *always* rollback.
93 * @param \Civi\API\Provider\ProviderInterface $apiProvider
94 * The API provider responsible for this request.
95 * @param array $apiRequest
96 * The full API request.
99 public function isForceRollback($apiProvider, $apiRequest) {
100 // FIXME: When APIv3 uses better parsing, only one check will be needed.
101 if (isset($apiRequest['params']['options']['force_rollback'])) {
102 return \CRM_Utils_String
::strtobool($apiRequest['params']['options']['force_rollback']);
104 if (isset($apiRequest['options']['force_rollback'])) {
105 return \CRM_Utils_String
::strtobool($apiRequest['options']['force_rollback']);
111 * Determine if caller wants a nested transaction or a re-used transaction.
113 * @param \Civi\API\Provider\ProviderInterface $apiProvider
114 * The API provider responsible for this request.
115 * @param array $apiRequest
116 * The full API request.
118 * True if a new nested transaction is required; false if active tx may be used
120 public function isNested($apiProvider, $apiRequest) {
121 if ($this->isForceRollback($apiProvider, $apiRequest)) {
124 if (isset($apiRequest['params']['is_transactional']) && $apiRequest['params']['is_transactional'] === 'nest') {
131 * Open a new transaction instance (if appropriate in the current policy)
133 * @param \Civi\API\Event\PrepareEvent $event
134 * API preparation event.
136 public function onApiPrepare(\Civi\API\Event\PrepareEvent
$event) {
137 $apiRequest = $event->getApiRequest();
138 if ($this->isTransactional($event->getApiProvider(), $apiRequest)) {
139 $this->transactions
[$apiRequest['id']] = new \
CRM_Core_Transaction($this->isNested($event->getApiProvider(), $apiRequest));
141 if ($this->isForceRollback($event->getApiProvider(), $apiRequest)) {
142 $this->transactions
[$apiRequest['id']]->rollback();
147 * Close any pending transactions.
149 * @param \Civi\API\Event\RespondEvent $event
150 * API response event.
152 public function onApiRespond(\Civi\API\Event\RespondEvent
$event) {
153 $apiRequest = $event->getApiRequest();
154 if (isset($this->transactions
[$apiRequest['id']])) {
155 if (civicrm_error($event->getResponse())) {
156 $this->transactions
[$apiRequest['id']]->rollback();
158 unset($this->transactions
[$apiRequest['id']]);
163 * Rollback the pending transaction.
165 * @param \Civi\API\Event\ExceptionEvent $event
166 * API exception event.
168 public function onApiException(\Civi\API\Event\ExceptionEvent
$event) {
169 $apiRequest = $event->getApiRequest();
170 if (isset($this->transactions
[$apiRequest['id']])) {
171 $this->transactions
[$apiRequest['id']]->rollback();
172 unset($this->transactions
[$apiRequest['id']]);