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<?php |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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/** |
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* Database infrastructure state shared by DatabaseCore helpers. |
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* |
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* Capability probes are memoized in-process and persisted briefly through |
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* WordPress transients so a known host limitation is not rediscovered by |
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* every new PHP request. |
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*/ |
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final class ABJ_404_Solution_DatabaseRuntimeState { |
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|
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/** @var int Cooldown when DB query quota is exceeded. */ |
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const DB_QUOTA_COOLDOWN_SECONDS = 900; |
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|
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/** @var int Cooldown when DB is read-only or storage is full. */ |
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const DB_WRITE_BLOCK_COOLDOWN_SECONDS = 900; |
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|
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/** @var string Cross-request flag for hosts that reject SET STATEMENT. */ |
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const SET_STATEMENT_WRAPPER_UNSUPPORTED_TRANSIENT = 'abj404_set_statement_wrapper_unsupported'; |
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|
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/** @var int Re-probe SET STATEMENT support after one hour. */ |
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const SET_STATEMENT_WRAPPER_UNSUPPORTED_TTL_SECONDS = 3600; |
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|
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/** @var bool Whether MariaDB SET STATEMENT wrapper failed and should be skipped. */ |
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private static $setStatementWrapperUnsupported = false; |
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|
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/** @var bool Whether the persisted capability flag was checked this request. */ |
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private static $setStatementWrapperPersistenceChecked = false; |
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|
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/** |
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* Update request-local support state and persist confirmed rejection. |
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* |
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* Passing false resets only request-local memoization. The transient is |
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* deliberately left intact so the next request still honors the observed |
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* host capability until its short TTL expires. |
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* |
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* @return void |
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*/ |
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public static function setSetStatementWrapperUnsupported(bool $value): void { |
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self::$setStatementWrapperUnsupported = $value; |
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self::$setStatementWrapperPersistenceChecked = $value; |
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if ($value && function_exists('set_transient')) { |
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// allow-cache-empty: capability-probe result, not a fallible query result. |
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set_transient( |
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self::SET_STATEMENT_WRAPPER_UNSUPPORTED_TRANSIENT, |
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1, |
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self::SET_STATEMENT_WRAPPER_UNSUPPORTED_TTL_SECONDS |
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); |
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} |
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} |
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|
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/** @return bool */ |
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public static function isSetStatementWrapperUnsupported(): bool { |
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if (self::$setStatementWrapperUnsupported) { |
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return true; |
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} |
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if (self::$setStatementWrapperPersistenceChecked) { |
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return false; |
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} |
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|
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self::$setStatementWrapperPersistenceChecked = true; |
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if (function_exists('get_transient')) { |
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$persisted = get_transient(self::SET_STATEMENT_WRAPPER_UNSUPPORTED_TRANSIENT); |
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self::$setStatementWrapperUnsupported = in_array($persisted, array(1, '1', true), true); |
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} |
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return self::$setStatementWrapperUnsupported; |
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} |
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|
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/** |
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* Name the source the next timeout-capability read will consult. |
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* |
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* This exposes no cache value or key. It exists so query-preflight |
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* diagnostics can distinguish an in-process decision from a WordPress |
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* transient read that may invoke a third-party object-cache drop-in. |
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*/ |
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public static function setStatementWrapperCapabilitySource(): string { |
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if (self::$setStatementWrapperUnsupported |
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|| self::$setStatementWrapperPersistenceChecked) { |
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return 'request_local'; |
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} |
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return function_exists('get_transient') ? 'transient' : 'unavailable'; |
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} |
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} |
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|
