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1 | <?php |
2 | /* | |
3 | +--------------------------------------------------------------------+ | |
81621fee | 4 | | CiviCRM version 4.7 | |
b55bc593 | 5 | +--------------------------------------------------------------------+ |
fa938177 | 6 | | Copyright CiviCRM LLC (c) 2004-2016 | |
b55bc593 TO |
7 | +--------------------------------------------------------------------+ |
8 | | This file is a part of CiviCRM. | | |
9 | | | | |
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. | | |
13 | | | | |
14 | | CiviCRM is distributed in the hope that it will be useful, but | | |
15 | | WITHOUT ANY WARRANTY; without even the implied warranty of | | |
16 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | | |
17 | | See the GNU Affero General Public License for more details. | | |
18 | | | | |
19 | | You should have received a copy of the GNU Affero General Public | | |
20 | | License and the CiviCRM Licensing Exception along | | |
21 | | with this program; if not, contact CiviCRM LLC | | |
22 | | at info[AT]civicrm[DOT]org. If you have questions about the | | |
23 | | GNU Affero General Public License or the licensing of CiviCRM, | | |
24 | | see the CiviCRM license FAQ at http://civicrm.org/licensing | | |
25 | +--------------------------------------------------------------------+ | |
d25dd0ee | 26 | */ |
b55bc593 TO |
27 | |
28 | namespace Civi\API\Subscriber; | |
8882ff5c | 29 | |
b55bc593 TO |
30 | use Civi\API\Events; |
31 | use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
32 | ||
6550386a EM |
33 | /** |
34 | * Class TransactionSubscriber | |
e29a1b03 TO |
35 | * |
36 | * Implement transaction management for API calls. Two API options are accepted: | |
8882ff5c TO |
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. | |
e29a1b03 | 43 | * |
6550386a EM |
44 | * @package Civi\API\Subscriber |
45 | */ | |
b55bc593 | 46 | class TransactionSubscriber implements EventSubscriberInterface { |
6550386a EM |
47 | /** |
48 | * @return array | |
49 | */ | |
b55bc593 TO |
50 | public static function getSubscribedEvents() { |
51 | return array( | |
52 | Events::PREPARE => array('onApiPrepare', Events::W_EARLY), | |
53 | Events::RESPOND => array('onApiRespond', Events::W_MIDDLE), | |
54 | Events::EXCEPTION => array('onApiException', Events::W_EARLY), | |
55 | ); | |
56 | } | |
57 | ||
58 | /** | |
5558f278 | 59 | * @var array (scalar $apiRequestId => CRM_Core_Transaction $tx) |
b55bc593 | 60 | */ |
5558f278 TO |
61 | private $transactions = array(); |
62 | ||
e29a1b03 TO |
63 | /** |
64 | * @var array (scalar $apiRequestId => bool) | |
65 | * | |
66 | * A list of requests which should be forcibly rolled back to | |
67 | * their save points. | |
68 | */ | |
69 | private $forceRollback = array(); | |
70 | ||
5558f278 | 71 | /** |
fe482240 | 72 | * Determine if an API request should be treated as transactional. |
5558f278 TO |
73 | * |
74 | * @param \Civi\API\Provider\ProviderInterface $apiProvider | |
8882ff5c | 75 | * The API provider responsible for this request. |
5558f278 | 76 | * @param array $apiRequest |
8882ff5c | 77 | * The full API request. |
5558f278 TO |
78 | * @return bool |
79 | */ | |
80 | public function isTransactional($apiProvider, $apiRequest) { | |
e29a1b03 | 81 | if ($this->isForceRollback($apiProvider, $apiRequest)) { |
8882ff5c | 82 | return TRUE; |
e29a1b03 | 83 | } |
289c8dd4 | 84 | if (isset($apiRequest['params']['is_transactional'])) { |
e29a1b03 | 85 | return \CRM_Utils_String::strtobool($apiRequest['params']['is_transactional']) || $apiRequest['params']['is_transactional'] == 'nest'; |
289c8dd4 | 86 | } |
5558f278 TO |
87 | return strtolower($apiRequest['action']) == 'create' || strtolower($apiRequest['action']) == 'delete' || strtolower($apiRequest['action']) == 'submit'; |
88 | } | |
b55bc593 | 89 | |
e29a1b03 TO |
90 | /** |
91 | * Determine if caller wants us to *always* rollback. | |
92 | * | |
93 | * @param \Civi\API\Provider\ProviderInterface $apiProvider | |
8882ff5c | 94 | * The API provider responsible for this request. |
e29a1b03 | 95 | * @param array $apiRequest |
8882ff5c | 96 | * The full API request. |
e29a1b03 TO |
97 | * @return bool |
98 | */ | |
99 | public function isForceRollback($apiProvider, $apiRequest) { | |
8882ff5c | 100 | // FIXME: When APIv3 uses better parsing, only one check will be needed. |
e29a1b03 TO |
101 | if (isset($apiRequest['params']['options']['force_rollback'])) { |
102 | return \CRM_Utils_String::strtobool($apiRequest['params']['options']['force_rollback']); | |
103 | } | |
104 | if (isset($apiRequest['options']['force_rollback'])) { | |
105 | return \CRM_Utils_String::strtobool($apiRequest['options']['force_rollback']); | |
106 | } | |
107 | return FALSE; | |
108 | } | |
109 | ||
110 | /** | |
111 | * Determine if caller wants a nested transaction or a re-used transaction. | |
112 | * | |
113 | * @param \Civi\API\Provider\ProviderInterface $apiProvider | |
8882ff5c | 114 | * The API provider responsible for this request. |
e29a1b03 | 115 | * @param array $apiRequest |
8882ff5c | 116 | * The full API request. |
a6c01b45 CW |
117 | * @return bool |
118 | * True if a new nested transaction is required; false if active tx may be used | |
e29a1b03 TO |
119 | */ |
120 | public function isNested($apiProvider, $apiRequest) { | |
121 | if ($this->isForceRollback($apiProvider, $apiRequest)) { | |
122 | return TRUE; | |
123 | } | |
8882ff5c | 124 | if (isset($apiRequest['params']['is_transactional']) && $apiRequest['params']['is_transactional'] === 'nest') { |
e29a1b03 TO |
125 | return TRUE; |
126 | } | |
127 | return FALSE; | |
128 | } | |
129 | ||
b55bc593 TO |
130 | /** |
131 | * Open a new transaction instance (if appropriate in the current policy) | |
132 | * | |
5558f278 | 133 | * @param \Civi\API\Event\PrepareEvent $event |
8882ff5c | 134 | * API preparation event. |
b55bc593 | 135 | */ |
8882ff5c | 136 | public function onApiPrepare(\Civi\API\Event\PrepareEvent $event) { |
b55bc593 | 137 | $apiRequest = $event->getApiRequest(); |
5558f278 | 138 | if ($this->isTransactional($event->getApiProvider(), $apiRequest)) { |
e29a1b03 TO |
139 | $this->transactions[$apiRequest['id']] = new \CRM_Core_Transaction($this->isNested($event->getApiProvider(), $apiRequest)); |
140 | } | |
141 | if ($this->isForceRollback($event->getApiProvider(), $apiRequest)) { | |
142 | $this->transactions[$apiRequest['id']]->rollback(); | |
b55bc593 TO |
143 | } |
144 | } | |
145 | ||
146 | /** | |
fe482240 | 147 | * Close any pending transactions. |
8882ff5c TO |
148 | * |
149 | * @param \Civi\API\Event\RespondEvent $event | |
150 | * API response event. | |
b55bc593 | 151 | */ |
8882ff5c | 152 | public function onApiRespond(\Civi\API\Event\RespondEvent $event) { |
5558f278 | 153 | $apiRequest = $event->getApiRequest(); |
ea24cf7f TO |
154 | if (isset($this->transactions[$apiRequest['id']])) { |
155 | if (civicrm_error($event->getResponse())) { | |
156 | $this->transactions[$apiRequest['id']]->rollback(); | |
157 | } | |
158 | unset($this->transactions[$apiRequest['id']]); | |
159 | } | |
b55bc593 TO |
160 | } |
161 | ||
162 | /** | |
fe482240 | 163 | * Rollback the pending transaction. |
b55bc593 TO |
164 | * |
165 | * @param \Civi\API\Event\ExceptionEvent $event | |
8882ff5c | 166 | * API exception event. |
b55bc593 | 167 | */ |
8882ff5c | 168 | public function onApiException(\Civi\API\Event\ExceptionEvent $event) { |
5558f278 TO |
169 | $apiRequest = $event->getApiRequest(); |
170 | if (isset($this->transactions[$apiRequest['id']])) { | |
171 | $this->transactions[$apiRequest['id']]->rollback(); | |
172 | unset($this->transactions[$apiRequest['id']]); | |
b55bc593 TO |
173 | } |
174 | } | |
96025800 | 175 | |
6550386a | 176 | } |