Complex classes like Connection 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 Connection, and based on these observations, apply Extract Interface, too.
1 | <?php |
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12 | class Connection extends ClientConnection |
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13 | { |
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14 | |||
15 | /** |
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16 | * @TODO DESCR |
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17 | */ |
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18 | const STATE_PACKET = 1; |
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19 | |||
20 | /** |
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21 | * @var string Database name |
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22 | */ |
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23 | public $dbname; |
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24 | /** |
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25 | * @var array Active cursors |
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26 | */ |
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27 | public $cursors = []; |
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28 | /** |
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29 | * @var array Pending requests |
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30 | */ |
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31 | public $requests = []; |
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32 | /** |
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33 | * @var integer ID of the last request |
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34 | */ |
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35 | public $lastReqId = 0; |
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36 | /** |
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37 | * @var integer Initial value of the minimal amout of bytes in buffer |
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38 | */ |
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39 | protected $lowMark = 16; |
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40 | /** |
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41 | * @var integer Initial value of the maximum amout of bytes in buffer |
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42 | */ |
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43 | protected $highMark = 0xFFFFFF; |
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44 | /** |
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45 | * @var array |
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46 | */ |
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47 | protected $hdr; |
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48 | protected $maxQueue = 10; |
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49 | |||
50 | /** |
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51 | * @TODO DESCR |
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52 | * @return void |
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53 | */ |
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54 | public function onReady() |
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83 | |||
84 | /** |
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85 | * Called when new data received |
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86 | * @return void |
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87 | */ |
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88 | public function onRead() |
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184 | |||
185 | /** |
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186 | * onFinish |
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187 | * @return void |
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188 | */ |
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189 | public function onFinish() |
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200 | } |
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201 |
This check looks
TODO
comments that have been left in the code.``TODO``s show that something is left unfinished and should be attended to.