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1 | <?php |
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2 | |||
3 | namespace SilverStripe\Config\Collections; |
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4 | |||
5 | use BadMethodCallException; |
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6 | use Psr\SimpleCache\CacheInterface; |
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7 | use SilverStripe\Config\Middleware\MiddlewareAware; |
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8 | |||
9 | class CachedConfigCollection implements ConfigCollectionInterface |
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10 | { |
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11 | use MiddlewareAware; |
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12 | |||
13 | /** |
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14 | * @const string |
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15 | */ |
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16 | const CACHE_KEY = '__CACHE__'; |
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17 | |||
18 | /** |
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19 | * @var CacheInterface |
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20 | */ |
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21 | protected $cache; |
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22 | |||
23 | /** |
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24 | * Nested config to delegate to |
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25 | * |
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26 | * @var ConfigCollectionInterface |
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27 | */ |
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28 | protected $collection; |
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29 | |||
30 | /** |
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31 | * @var callable |
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32 | */ |
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33 | protected $collectionCreator; |
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34 | |||
35 | /** |
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36 | * @var bool |
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37 | */ |
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38 | protected $flush = false; |
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39 | |||
40 | /** |
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41 | * Set to true while building config. |
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42 | * Used to protect against infinite loops. |
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43 | * |
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44 | * @var bool |
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45 | */ |
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46 | protected $building = false; |
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47 | |||
48 | /** |
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49 | * Injectable factory for nesting config. |
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50 | * This callback will be passed the inner ConfigCollection |
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51 | * |
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52 | * @var callable |
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53 | */ |
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54 | protected $nestFactory = null; |
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55 | |||
56 | /** |
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57 | * @return static |
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58 | */ |
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59 | public static function create() |
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60 | { |
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61 | return new static(); |
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62 | } |
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63 | |||
64 | /** |
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65 | * Get callback for nesting the inner collection |
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66 | * |
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67 | * @return callable |
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68 | */ |
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69 | public function getNestFactory() |
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70 | { |
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71 | return $this->nestFactory; |
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72 | } |
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73 | |||
74 | /** |
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75 | * Set callback for nesting the inner collection |
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76 | * |
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77 | * @param callable $factory |
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78 | * @return $this |
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79 | */ |
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80 | public function setNestFactory(callable $factory) |
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81 | { |
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82 | $this->nestFactory = $factory; |
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83 | return $this; |
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84 | } |
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85 | |||
86 | 2 | public function get($class, $name = null, $excludeMiddleware = 0) |
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87 | { |
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88 | 2 | return $this->getCollection()->get($class, $name, $excludeMiddleware); |
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89 | } |
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90 | |||
91 | public function getAll() |
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92 | { |
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93 | return $this->getCollection()->getAll(); |
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94 | } |
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95 | |||
96 | 2 | public function exists($class, $name = null, $excludeMiddleware = 0) |
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97 | { |
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98 | 2 | return $this->getCollection()->exists($class, $name, $excludeMiddleware); |
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99 | } |
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100 | |||
101 | public function getMetadata() |
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102 | { |
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103 | return $this->getCollection()->getMetadata(); |
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104 | } |
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105 | |||
106 | public function getHistory() |
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107 | { |
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108 | return $this->getCollection()->getHistory(); |
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109 | } |
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110 | |||
111 | /** |
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112 | * Get or build collection |
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113 | * |
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114 | * @return ConfigCollectionInterface |
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115 | */ |
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116 | 3 | public function getCollection() |
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117 | { |
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118 | // Get current collection |
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119 | 3 | if ($this->collection) { |
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120 | 2 | return $this->collection; |
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121 | } |
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122 | |||
123 | // Load from cache (unless flushing) |
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124 | 3 | if (!$this->flush) { |
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125 | 3 | $this->collection = $this->cache->get(self::CACHE_KEY); |
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126 | 3 | if ($this->collection) { |
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127 | 1 | return $this->collection; |
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128 | } |
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129 | 2 | } |
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130 | |||
131 | // Protect against infinity loop |
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132 | 2 | if ($this->building) { |
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133 | 1 | throw new BadMethodCallException("Infinite loop detected. Config could not be bootstrapped."); |
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134 | } |
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135 | 2 | $this->building = true; |
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136 | |||
137 | // Cache missed |
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138 | try { |
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139 | 2 | $this->collection = call_user_func($this->collectionCreator); |
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140 | 1 | } finally { |
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141 | 2 | $this->building = false; |
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142 | 2 | } |
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143 | |||
144 | // Save immediately. |
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145 | // Note additional deferred save will occur in _destruct() |
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146 | 1 | $this->cache->set(self::CACHE_KEY, $this->collection); |
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147 | 1 | return $this->collection; |
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148 | } |
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149 | |||
150 | /** |
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151 | * Commits the cache |
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152 | */ |
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153 | 2 | public function __destruct() |
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154 | { |
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155 | // Ensure back-end cache is updated |
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156 | 2 | if ($this->collection) { |
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157 | 2 | $this->cache->set(self::CACHE_KEY, $this->collection); |
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158 | |||
159 | // Prevent double-destruct |
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160 | 2 | $this->collection = null; |
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161 | 2 | } |
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162 | 2 | } |
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163 | |||
164 | public function nest() |
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165 | { |
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166 | $collection = $this->getCollection(); |
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167 | $factory = $this->getNestFactory(); |
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168 | if ($factory) { |
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169 | return $factory($collection); |
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170 | } |
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171 | |||
172 | // Fall back to regular nest |
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173 | return $collection->nest(); |
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174 | } |
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175 | |||
176 | /** |
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177 | * Set a PSR-16 cache |
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178 | * |
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179 | * @param CacheInterface $cache |
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180 | * @return $this |
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181 | */ |
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182 | 3 | public function setCache(CacheInterface $cache) |
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183 | { |
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184 | 3 | $this->cache = $cache; |
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185 | 3 | if ($this->flush) { |
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186 | $cache->clear(); |
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187 | } |
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188 | 3 | return $this; |
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189 | } |
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190 | |||
191 | /** |
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192 | * @param callable $collectionCreator |
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193 | * @return $this |
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194 | */ |
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195 | 3 | public function setCollectionCreator($collectionCreator) |
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196 | { |
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197 | 3 | $this->collectionCreator = $collectionCreator; |
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198 | 3 | return $this; |
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199 | } |
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200 | |||
201 | /** |
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202 | * @return callable |
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203 | */ |
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204 | public function getCollectionCreator() |
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205 | { |
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206 | return $this->collectionCreator; |
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207 | } |
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208 | |||
209 | /** |
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210 | * @return CacheInterface |
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211 | */ |
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212 | public function getCache() |
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213 | { |
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214 | return $this->cache; |
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215 | } |
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216 | |||
217 | /** |
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218 | * @param bool $flush |
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219 | * @return $this |
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220 | */ |
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221 | public function setFlush($flush) |
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222 | { |
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223 | $this->flush = $flush; |
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224 | if ($flush && $this->cache) { |
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225 | $this->cache->clear(); |
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226 | } |
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227 | return $this; |
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228 | } |
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229 | |||
230 | /** |
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231 | * @return bool |
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232 | */ |
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233 | public function getFlush() |
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234 | { |
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235 | return $this->flush; |
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236 | } |
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237 | |||
238 | public function setMiddlewares($middlewares) |
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239 | { |
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240 | throw new BadMethodCallException( |
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241 | "Please apply middleware to collection factory via setCollectionCreator()" |
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242 | ); |
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243 | } |
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244 | |||
245 | /** |
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246 | * @deprecated 4.0...5.0 Please use YAML configuration, ::modify()->set() or ::modify()->merge() |
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247 | * @throws BadMethodCallException |
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248 | */ |
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249 | public function update($class, $name, $value) |
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250 | { |
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251 | throw new BadMethodCallException( |
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252 | 'Config::inst()->update() is deprecated. Please use YAML configuration, Config::modify()->merge() or ->set()' |
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253 | ); |
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254 | } |
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255 | } |
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256 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.