/**
* 创建ElexConfig的实例
* @param $config_file
* @param $options
* @return ElexConfig
*/
public static function getInstance($config_file, $options = null)
{
if (!self::$instance instanceof self) {
self::$use_apc_cache = function_exists('apc_fetch');
// 验证配置文件路径的正确性
self::checkConfigPath($config_file);
// 先尝试从缓存中反序列化
self::$instance = self::getConfigFromCache($config_file);
if (empty(self::$instance)) {
// 创建一个新的ElexConfig对象
self::$instance = new self($config_file, $options);
// 将对象序列化后写入缓存
self::writeConfigToCache($config_file, self::$instance);
}
}
return self::$instance;
}
protected function init($options)
{
parent::init($options);
// 处理包含"|"的section，将其扩展为多个section
if (is_array($this->config) && !empty($this->config)) {
foreach ($this->config as $section => $values) {
if (strpos($section, '|') !== false) {
$sections = explode('|', $section);
foreach ($sections as $sec) {
$this->config[trim($sec)] = $values;
}
unset($this->config[$section]);
}
}
}
// 针对fields进行特殊处理，因为fields字段属于比较费时间来进行解析的字段，所以最好将其缓存到APC缓存中去
$fields_defs_as_str = $this->config[self::TABLE_FIELDS];
if (isset($fields_defs_as_str)) {
$fields_defs = array();
foreach ($fields_defs_as_str as $table_name => $fields_def_as_str) {
$fields_def = preg_split('/[:+]/', $fields_def_as_str);
for ($i = 0, $length = count($fields_def) - 1; $i < $length; $i = $i + 3) {
$field_name = $fields_def[$i];
$field_type = $fields_def[$i + 1];
$default_value = $fields_def[$i + 2];
if (!in_array($field_type, array(FieldType::TYPE_INTEGER, FieldType::TYPE_STRING, FieldType::TYPE_FLOAT, FieldType::TYPE_PACKED))) {
$this->throwException("fields definition error:unknown type[" . $fields_def[$i + 1] . "]", ELEX_ERR_CONFIG_ERROR);
}
$field_props = array("name" => $field_name, "type" => $field_type);
if (strpos($default_value, "function<>") !== false) {
$arr = explode("<>", $default_value);
$field_props['default'] = "function";
$field_props['function'] = $arr[1];
} else {
$field_props['default'] = $default_value;
}
$fields_defs[$table_name][$field_props['name']] = $field_props;
}
}
$this->config[self::TABLE_FIELDS] = $fields_defs;
}
// 缓存提交数据库阈值cache_commit_threshold
$cache_commit_thresholds_as_str = $this->config[self::TABLE_CACHE_COMMIT_THRESHOLD];
if (isset($cache_commit_thresholds_as_str)) {
$cache_commit_threshold_defs = array();
foreach ($cache_commit_thresholds_as_str as $table_name => $cache_commit_threshold_as_str) {
$parts = explode(":", $cache_commit_threshold_as_str);
$cache_commit_threshold_defs[$table_name]['threshold'] = isset($parts[0]) ? intval($parts[0]) : 0;
$cache_commit_threshold_defs[$table_name]['expire'] = isset($parts[1]) ? intval($parts[1]) : 1800;
}
$this->config[self::TABLE_CACHE_COMMIT_THRESHOLD] = $cache_commit_threshold_defs;
}
// 压缩数据处理pack_fields
$pack_fields_as_str = $this->config[self::TABLE_PACK_FIELDS];
if (isset($pack_fields_as_str)) {
$pack_fields_defs = array();
foreach ($pack_fields_as_str as $table_name => $pack_field_as_str) {
$packed_fields_def = array();
$parts = explode(",", $pack_field_as_str);
foreach ($parts as $part) {
$preg_parts = preg_split('/[:\\/]/', $part);
$sub_fields = array();
$unit_size = 0;
$format = substr($part, strpos($part, ":") + 1);
for ($i = 1; $i < count($preg_parts); $i++) {
$preg_part = $preg_parts[$i];
$sub_field_name = substr($preg_part, 1);
$sub_fields[$sub_field_name] = $preg_part[0];
switch ($preg_part[0]) {
case "C":
$unit_size += 1;
break;
case "S":
$unit_size += 2;
break;
case "L":
$unit_size += 4;
break;
}
}
$packed_fields_def[$preg_parts[0]] = array("unit_size" => $unit_size, "sub_fields" => $sub_fields, "format" => $format);
}
$pack_fields_defs[$table_name] = $packed_fields_def;
}
$this->config[self::TABLE_PACK_FIELDS] = $pack_fields_defs;
}
$global_config = $this->config[self::CONFIG_GLOBAL];
$this->service_is_closed = $this->getValue($global_config, self::SERVICE_CLOSED, false, 'bool');
$this->debug_mode = $this->getValue($global_config, self::DEBUG_MODE, false, 'bool');
$this->perf_test_mode = $this->getValue($global_config, self::PERF_TEST_MODE, false, 'bool');
}
