Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like DNDeployment often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use DNDeployment, and based on these observations, apply Extract Interface, too.
1 | <?php |
||
19 | class DNDeployment extends DataObject implements Finite\StatefulInterface, HasStateMachine { |
||
20 | |||
21 | const STATE_NEW = 'New'; |
||
22 | const STATE_SUBMITTED = 'Submitted'; |
||
23 | const STATE_INVALID = 'Invalid'; |
||
24 | const STATE_APPROVED = 'Approved'; |
||
25 | const STATE_REJECTED = 'Rejected'; |
||
26 | const STATE_QUEUED = 'Queued'; |
||
27 | const STATE_DEPLOYING = 'Deploying'; |
||
28 | const STATE_ABORTING = 'Aborting'; |
||
29 | const STATE_COMPLETED = 'Completed'; |
||
30 | const STATE_FAILED = 'Failed'; |
||
31 | // Deleted is used as 'soft-delete' which will in all regards keep the record in the DB |
||
32 | // but not display it in the UI. This is for auditing and also for UI history updates |
||
33 | const STATE_DELETED = 'Deleted'; |
||
34 | |||
35 | const TR_NEW = 'new'; |
||
36 | const TR_SUBMIT = 'submit'; |
||
37 | const TR_INVALIDATE = 'invalidate'; |
||
38 | const TR_APPROVE = 'approve'; |
||
39 | const TR_REJECT = 'reject'; |
||
40 | const TR_QUEUE = 'queue'; |
||
41 | const TR_DEPLOY = 'deploy'; |
||
42 | const TR_ABORT = 'abort'; |
||
43 | const TR_COMPLETE = 'complete'; |
||
44 | const TR_FAIL = 'fail'; |
||
45 | const TR_DELETE = 'delete'; |
||
46 | |||
47 | /** |
||
48 | * @var array |
||
49 | */ |
||
50 | private static $db = array( |
||
51 | "SHA" => "GitSHA", |
||
52 | "ResqueToken" => "Varchar(255)", |
||
53 | // is it a branch, tag etc, see GitDispatcher REF_TYPE_* constants |
||
54 | "RefType" => "Int", |
||
55 | // The ref name that was used to deploy this, e.g. branch name or tag. |
||
56 | // Can't really be inferred from Git history because the commit could appear in lots of |
||
57 | // branches/tags that are irrelevant to the user when it comes to deployment history, and the reference |
||
58 | // may have been deleted. |
||
59 | "RefName" => "Varchar(255)", |
||
60 | "State" => "Enum('New, Submitted, Invalid, Approved, Rejected, Queued, Deploying, Aborting, Completed, Failed, Deleted', 'New')", |
||
61 | // JSON serialised DeploymentStrategy. |
||
62 | "Strategy" => "Text", |
||
63 | "Title" => "Varchar(255)", |
||
64 | "Summary" => "Text", |
||
65 | // the date and time the deploy was queued |
||
66 | "DeployStarted" => "SS_Datetime", |
||
67 | // the date and time a deployment was requested to be approved |
||
68 | "DeployRequested" => "SS_Datetime", |
||
69 | "RejectedReason" => "Text" |
||
70 | ); |
||
71 | |||
72 | /** |
||
73 | * @var array |
||
74 | */ |
||
75 | private static $has_one = array( |
||
76 | "Environment" => "DNEnvironment", |
||
77 | "Deployer" => "Member", |
||
78 | "Approver" => "Member", |
||
79 | "BackupDataTransfer" => "DNDataTransfer" // denotes an automated backup done for this deployment |
||
80 | ); |
||
81 | |||
82 | private static $default_sort = '"LastEdited" DESC'; |
||
83 | |||
84 | private static $dependencies = [ |
||
85 | 'stateMachineFactory' => '%$StateMachineFactory' |
||
86 | ]; |
||
87 | |||
88 | private static $summary_fields = array( |
||
89 | 'LastEdited' => 'Last Edited', |
||
90 | 'SHA' => 'SHA', |
||
91 | 'State' => 'State', |
||
92 | 'Deployer.Name' => 'Deployer' |
||
93 | ); |
||
94 | |||
95 | public function setResqueToken($token) { |
||
98 | |||
99 | public function getFiniteState() { |
||
102 | |||
103 | public function setFiniteState($state) { |
||
107 | |||
108 | public function getStatus() { |
||
111 | |||
112 | public function getMachine() { |
||
115 | |||
116 | public function Link() { |
||
123 | |||
124 | public function LogLink() { |
||
127 | |||
128 | public function canView($member = null) { |
||
131 | |||
132 | /** |
||
133 | * Return a path to the log file. |
||
134 | * @return string |
||
135 | */ |
||
136 | protected function logfile() { |
||
143 | |||
144 | /** |
||
145 | * @return DeploynautLogFile |
||
146 | */ |
||
147 | public function log() { |
||
150 | |||
151 | public function LogContent() { |
||
154 | |||
155 | /** |
||
156 | * This remains here for backwards compatibility - we don't want to expose Resque status in here. |
||
157 | * Resque job (DeployJob) will change statuses as part of its execution. |
||
158 | * |
||
159 | * @return string |
||
160 | */ |
||
161 | public function ResqueStatus() { |
||
164 | |||
165 | /** |
||
166 | * Fetch the git repository |
||
167 | * |
||
168 | * @return \Gitonomy\Git\Repository|null |
||
169 | */ |
||
170 | public function getRepository() { |
||
176 | |||
177 | /** |
||
178 | * Gets the commit from source. The result is cached upstream in Repository. |
||
179 | * |
||
180 | * @return \Gitonomy\Git\Commit|null |
||
181 | */ |
||
182 | View Code Duplication | public function getCommit() { |
|
194 | |||
195 | /** |
||
196 | * Get the commit URL to the commit associated with this deployment. |
||
197 | * @return null|string |
||
198 | */ |
||
199 | public function getCommitURL() { |
||
214 | |||
215 | /** |
||
216 | * Gets the commit message. |
||
217 | * |
||
218 | * @return string|null |
||
219 | */ |
||
220 | View Code Duplication | public function getCommitMessage() { |
|
231 | |||
232 | /** |
||
233 | * Gets the commit message. |
||
234 | * |
||
235 | * @return string|null |
||
236 | */ |
||
237 | View Code Duplication | public function getCommitSubjectMessage() { |
|
248 | |||
249 | /** |
||
250 | * Return all tags for the deployed commit. |
||
251 | * |
||
252 | * @return ArrayList |
||
253 | */ |
||
254 | public function getTags() { |
||
270 | |||
271 | /** |
||
272 | * Collate the list of additional flags to affix to this deployment. |
||
273 | * Elements of the array will be rendered literally. |
||
274 | * |
||
275 | * @return ArrayList |
||
276 | */ |
||
277 | public function getFullDeployMessages() { |
||
304 | |||
305 | /** |
||
306 | * Fetches the latest tag for the deployed commit |
||
307 | * |
||
308 | * @return \Varchar|null |
||
309 | */ |
||
310 | public function getTag() { |
||
317 | |||
318 | /** |
||
319 | * @return DeploymentStrategy |
||
320 | */ |
||
321 | public function getDeploymentStrategy() { |
||
327 | |||
328 | /** |
||
329 | * Return a list of things that are going to be deployed, such |
||
330 | * as the code version, and any infrastructural changes. |
||
331 | * |
||
332 | * @return ArrayList |
||
333 | */ |
||
334 | public function getChanges() { |
||
360 | |||
361 | /** |
||
362 | * Start a resque job for this deployment |
||
363 | * |
||
364 | * @return string Resque token |
||
365 | */ |
||
366 | public function enqueueDeployment() { |
||
405 | |||
406 | public function getSigFile() { |
||
418 | |||
419 | /** |
||
420 | * Signal the worker to self-abort. If we had a reliable way of figuring out the right PID, |
||
421 | * we could posix_kill directly, but Resque seems to not provide a way to find out the PID |
||
422 | * from the job nor worker. |
||
423 | */ |
||
424 | public function setSignal($signal) { |
||
429 | } |
||
430 |
This check marks property names that have not been written in camelCase.
In camelCase names are written without any punctuation, the start of each new word being marked by a capital letter. Thus the name database connection string becomes
databaseConnectionString
.