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dbcache.php
194 lines (146 loc) · 5.5 KB
/
dbcache.php
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<?php
class DbCache {
static $servername = DB_HOST;
static $username = DB_USER;
static $password = DB_PASSWORD;
static $dbname = DB_NAME;
function __construct() {
}
function setCache($cacheName) {
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
$sql = 'CREATE TABLE IF NOT EXISTS `cached_data` (
`cache_key` varchar(200) DEFAULT NULL,
`value` longblob,
`timestamp` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
`expiration` int(11) DEFAULT NULL,
KEY `cache_key` (`cache_key`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8';
$conn->query($sql);
$conn->close();
}
function retrieve($cacheKey) {
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
$sql = "SELECT value FROM cached_data WHERE cache_key = ? order by timestamp desc limit 1";
$stmt = $conn->prepare($sql);
$stmt->bind_param('s', $cacheKey);
$stmt->execute();
$result = $stmt->get_result();
$return = NULL;
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
$return = json_decode($row['value'], TRUE);
$isValid = json_last_error() === JSON_ERROR_NONE; /// check data un valid json format
if($isValid == FALSE){
$return = FALSE;
}
// if($cacheKey == 'GetAllLotData-By-8-33-101-102-34-35-106') {
// var_dump($row['value']);
// }
break;
}
}
$stmt->close();
$conn->close();
return $return;
}
function retrieveAll() {
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
$sql = "SELECT value FROM cached_data";
$stmt = $conn->prepare($sql);
$stmt->execute();
$result = $stmt->get_result();
$return = array();
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
$return[] = $row['value'];
}
}
$stmt->close();
$conn->close();
return $return;
}
function dbConnection(){
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
return $conn;
}
function storeWithTransection($cacheKey, $data, $conn) {
// if(!isset($conn)) {
// $conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
// }
$query = FALSE;
$refreshTime = 432000;
if(count($data) > 0 && !empty($data)){
$sql_del = "DELETE FROM cached_data WHERE cache_key = ?";
$stmt_del = $conn->prepare($sql_del);
$stmt_del->bind_param("s", $cacheKey);
$stmt_del->execute();
$sql = "INSERT INTO cached_data (cache_key, value, expiration) VALUES (?, ?, ?)";
$stmt = $conn->prepare($sql);
$stmt->bind_param("ssi", $cacheKey, json_encode($data), $refreshTime);
$stmt->execute();
$stmt_del->close();
$stmt->close();
if($conn->affected_rows){
$query = TRUE;
}
}
return $query;
//$conn->close();
}
function store($cacheKey, $data, $refreshTime) {
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
$sql_del = "DELETE FROM cached_data WHERE cache_key = ?";
$stmt_del = $conn->prepare($sql_del);
$stmt_del->bind_param("s", $cacheKey);
$stmt_del->execute();
$sql = "INSERT INTO cached_data (cache_key, value, expiration) VALUES (?, ?, ?)";
$stmt = $conn->prepare($sql);
$stmt->bind_param("ssi", $cacheKey, json_encode($data), $refreshTime);
$stmt->execute();
$stmt_del->close();
$stmt->close();
$conn->close();
}
function eraseAll() {
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
$sql_del = "DELETE FROM cached_data";
$stmt_del = $conn->prepare($sql_del);
$stmt_del->execute();
$stmt_del->close();
$conn->close();
}
function isCached($cacheKey) {
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
$sql = "SELECT 'x' FROM cached_data WHERE cache_key = ?";
$stmt = $conn->prepare($sql);
$stmt->bind_param('s', $cacheKey);
$stmt->execute();
$result = $stmt->get_result();
$return = FALSE;
if ($result->num_rows > 0 ) {
$return = TRUE;
}
$stmt->close();
$conn->close();
return $return;
}
function getCacheDate(){
$conn = new mysqli(self::$servername, self::$username, self::$password, self::$dbname);
$sql = "SELECT timestamp FROM cached_data order by timestamp desc limit 1";
$stmt = $conn->prepare($sql);
//$stmt->bind_param('s');
$stmt->execute();
$result = $stmt->get_result();
//var_dump($result);
$return = NULL;
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
$return = json_decode($row['value'], TRUE);
break;
}
}
$stmt->close();
$conn->close();
return $return;
}
}