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1 | <?php |
2 | /** |
3 | * This program is free software; you can redistribute it and/or modify |
4 | * it under the terms of the GNU General Public License as published by |
5 | * the Free Software Foundation; either version 2 of the License, or |
6 | * (at your option) any later version. |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
16 | * http://www.gnu.org/copyleft/gpl.html |
17 | * |
18 | * @file |
19 | */ |
20 | |
21 | /** |
22 | * Job that has a run() method and metadata accessors for JobQueue::pop() and JobQueue::ack(). |
23 | * |
24 | * Instances are not only enqueueable via JobQueue::push(), but they can also be executed by |
25 | * calling their run() method. When constructing a job to be enqueued via JobQueue::push(), it |
26 | * will not be possible to construct a RunnableJob instance if the class for that job is not |
27 | * loaded by the application for the local DB domain. In that case, the general-purpose |
28 | * JobSpecification class can be used instead. |
29 | * |
30 | * @stable to implement |
31 | * @since 1.33 |
32 | * @ingroup JobQueue |
33 | */ |
34 | interface RunnableJob extends IJobSpecification { |
35 | /** @var int Job must not be wrapped in the usual explicit LBFactory transaction round */ |
36 | public const JOB_NO_EXPLICIT_TRX_ROUND = 1; |
37 | |
38 | /** |
39 | * Run the job |
40 | * @return bool Success |
41 | */ |
42 | public function run(); |
43 | |
44 | /** |
45 | * @param string|null $field Metadata field or null to get all the metadata |
46 | * @return mixed|null Value; null if missing |
47 | */ |
48 | public function getMetadata( $field = null ); |
49 | |
50 | /** |
51 | * @param string $field Key name to set the value for |
52 | * @param mixed $value The value to set the field for |
53 | * @return mixed|null The prior field value; null if missing |
54 | */ |
55 | public function setMetadata( $field, $value ); |
56 | |
57 | /** |
58 | * @param int $flag JOB_* class constant |
59 | * @return bool |
60 | * @since 1.31 |
61 | */ |
62 | public function hasExecutionFlag( $flag ); |
63 | |
64 | /** |
65 | * @return string|null Id of the request that created this job. Follows |
66 | * jobs recursively, allowing to track the id of the request that started a |
67 | * job when jobs insert jobs which insert other jobs. |
68 | * @since 1.27 |
69 | */ |
70 | public function getRequestId(); |
71 | |
72 | /** |
73 | * @warning In some setups (i.e. when using change-propagation) jobs may |
74 | * still be retried even when this is false if the job fails due to a |
75 | * timeout unless it is also configured in change-prop config (T358939). |
76 | * @return bool Whether this job can be retried on failure by job runners |
77 | * @since 1.21 |
78 | */ |
79 | public function allowRetries(); |
80 | |
81 | /** |
82 | * @return int Number of actually "work items" handled in this job |
83 | * @see $wgJobBackoffThrottling |
84 | * @since 1.23 |
85 | */ |
86 | public function workItemCount(); |
87 | |
88 | /** |
89 | * @return int|null UNIX timestamp of when the job was runnable, or null |
90 | * @since 1.26 |
91 | */ |
92 | public function getReadyTimestamp(); |
93 | |
94 | /** |
95 | * Do any final cleanup after run(), deferred updates, and all DB commits happen |
96 | * @param bool $status Whether the job, its deferred updates, and DB commit all succeeded |
97 | * @since 1.27 |
98 | */ |
99 | public function tearDown( $status ); |
100 | |
101 | /** |
102 | * @return string |
103 | */ |
104 | public function getLastError(); |
105 | |
106 | /** |
107 | * @return string Debugging string describing the job |
108 | */ |
109 | public function toString(); |
110 | } |