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<?php |
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/** |
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* Created by PhpStorm. |
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* User: hugh.li |
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* Date: 2021/6/8 |
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* Time: 7:42 下午. |
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*/ |
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namespace HughCube\Laravel\OTS\Cache; |
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use Aliyun\OTS\Consts\ColumnTypeConst; |
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use Aliyun\OTS\Consts\ComparatorTypeConst; |
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use Aliyun\OTS\Consts\LogicalOperatorConst; |
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use Aliyun\OTS\Consts\RowExistenceExpectationConst; |
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use Aliyun\OTS\OTSClientException; |
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use Aliyun\OTS\OTSServerException; |
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use HughCube\Laravel\OTS\Connection; |
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class Lock extends \Illuminate\Cache\Lock |
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{ |
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use Attribute; |
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/** |
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* Lock constructor. |
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* |
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* @param Connection $ots |
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* @param string $table |
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* @param string $prefix |
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* @param string $name |
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* @param int $seconds |
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* @param string|null $owner |
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*/ |
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public function __construct($ots, $table, $prefix, string $name, int $seconds, ?string $owner = null) |
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{ |
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parent::__construct($name, $seconds, $owner); |
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$this->ots = $ots; |
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$this->table = $table; |
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$this->prefix = $prefix; |
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$this->type = 'lock'; |
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} |
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/** |
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* Attempt to acquire the lock. |
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* |
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* @throws OTSServerException |
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* @throws OTSClientException |
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* |
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* @return bool |
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*/ |
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public function acquire(): bool |
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{ |
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$request = [ |
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'table_name' => $this->getTable(), |
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'condition' => [ |
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'row_existence' => RowExistenceExpectationConst::CONST_IGNORE, |
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'column_condition' => [ |
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'logical_operator' => LogicalOperatorConst::CONST_OR, |
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'sub_conditions' => [ |
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/** (`owner` != $this->owner OR `owner` IS NULL) AND (`expiration` >= time()) */ |
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[ |
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'logical_operator' => LogicalOperatorConst::CONST_AND, |
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'sub_conditions' => [ |
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[ |
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'column_name' => 'owner', |
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'value' => [$this->owner, ColumnTypeConst::CONST_STRING], |
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'comparator' => ComparatorTypeConst::CONST_NOT_EQUAL, |
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'pass_if_missing' => true, |
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'latest_version_only' => true, |
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], |
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[ |
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'column_name' => 'expiration', |
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'value' => [$this->currentTime(), ColumnTypeConst::CONST_INTEGER], |
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'comparator' => ComparatorTypeConst::CONST_LESS_EQUAL, |
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'pass_if_missing' => true, |
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'latest_version_only' => true, |
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], |
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], |
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], |
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/** (`owner` = $this->owner OR `owner` IS NULL) */ |
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[ |
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'column_name' => 'owner', |
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'value' => [$this->owner, ColumnTypeConst::CONST_STRING], |
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'comparator' => ComparatorTypeConst::CONST_EQUAL, |
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'pass_if_missing' => true, |
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'latest_version_only' => true, |
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], |
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], |
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], |
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], |
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'primary_key' => $this->makePrimaryKey($this->name), |
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'attribute_columns' => $this->makeAttributeColumns(time(), $this->seconds), |
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]; |
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try { |
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$response = $this->getOts()->putRow($request); |
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return isset($response['primary_key'], $response['attribute_columns']); |
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} catch (OTSServerException $exception) { |
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if ('OTSConditionCheckFail' === $exception->getOTSErrorCode()) { |
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return false; |
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} |
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throw $exception; |
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} |
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} |
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/** |
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* Release the lock. |
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* |
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* @throws OTSClientException |
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* @throws OTSServerException |
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* |
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* @return bool |
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*/ |
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public function release(): bool |
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{ |
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$request = [ |
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'table_name' => $this->getTable(), |
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'condition' => [ |
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'row_existence' => RowExistenceExpectationConst::CONST_EXPECT_EXIST, |
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/** (`owner` = $this->owner) */ |
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'column_condition' => [ |
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'column_name' => 'owner', |
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'value' => $this->owner, |
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'comparator' => ComparatorTypeConst::CONST_EQUAL, |
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'pass_if_missing' => false, |
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'latest_version_only' => true, |
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], |
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], |
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'primary_key' => $this->makePrimaryKey($this->name), |
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]; |
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try { |
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$response = $this->getOts()->deleteRow($request); |
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return isset($response['primary_key'], $response['attribute_columns']); |
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} catch (OTSServerException $exception) { |
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if ('OTSConditionCheckFail' === $exception->getOTSErrorCode()) { |
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return false; |
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} |
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throw $exception; |
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} |
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} |
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/** |
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* Releases this lock in disregard of ownership. |
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* |
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* @throws OTSClientException |
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* @throws OTSServerException |
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* |
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* @return bool |
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*/ |
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public function forceRelease(): bool |
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{ |
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$request = [ |
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'table_name' => $this->getTable(), |
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'condition' => RowExistenceExpectationConst::CONST_IGNORE, |
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'primary_key' => $this->makePrimaryKey($this->name), |
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]; |
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$response = $this->getOts()->deleteRow($request); |
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return isset($response['primary_key'], $response['attribute_columns']); |
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} |
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/** |
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* Returns the owner value written into the driver for this lock. |
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* |
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* @throws OTSClientException |
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* @throws OTSServerException |
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* |
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* @return mixed|string |
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*/ |
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protected function getCurrentOwner() |
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{ |
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$request = [ |
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'table_name' => $this->getTable(), |
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'primary_key' => $this->makePrimaryKey($this->name), |
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'max_versions' => 1, |
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]; |
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$response = $this->getOts()->getRow($request); |
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if (null === $this->parseValueInOtsResponse($response)) { |
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return ''; |
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} |
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foreach ($response['attribute_columns'] as $attribute) { |
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if ('owner' === $attribute[0]) { |
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return $attribute[1]; |
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} |
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} |
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return ''; |
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} |
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} |
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