1060 lines
30 KiB
PHP
1060 lines
30 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace think\db;
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use PDO;
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use PDOStatement;
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use think\Db;
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use think\db\exception\BindParamException;
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use think\Debug;
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use think\Exception;
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use think\exception\PDOException;
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use think\Log;
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/**
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* Class Connection
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* @package think
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* @method Query table(string $table) 指定数据表（含前缀）
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* @method Query name(string $name) 指定数据表（不含前缀）
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*
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*/
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abstract class Connection
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{
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/** @var PDOStatement PDO操作实例 */
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protected $PDOStatement;
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/** @var string 当前SQL指令 */
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protected $queryStr = '';
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// 返回或者影响记录数
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protected $numRows = 0;
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// 事务指令数
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protected $transTimes = 0;
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// 错误信息
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protected $error = '';
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/** @var PDO[] 数据库连接ID 支持多个连接 */
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protected $links = [];
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/** @var PDO 当前连接ID */
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protected $linkID;
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protected $linkRead;
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protected $linkWrite;
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// 查询结果类型
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protected $fetchType = PDO::FETCH_ASSOC;
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// 字段属性大小写
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protected $attrCase = PDO::CASE_LOWER;
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// 监听回调
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protected static $event = [];
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// 使用Builder类
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protected $builder;
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// 数据库连接参数配置
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protected $config = [
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// 数据库类型
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'type' => '',
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// 服务器地址
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'hostname' => '',
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// 数据库名
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'database' => '',
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// 用户名
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'username' => '',
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// 密码
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'password' => '',
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// 端口
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'hostport' => '',
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// 连接dsn
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'dsn' => '',
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// 数据库连接参数
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'params' => [],
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// 数据库编码默认采用utf8
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'charset' => 'utf8',
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// 数据库表前缀
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'prefix' => '',
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// 数据库调试模式
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'debug' => false,
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// 数据库部署方式:0 集中式(单一服务器),1 分布式(主从服务器)
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'deploy' => 0,
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// 数据库读写是否分离 主从式有效
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'rw_separate' => false,
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// 读写分离后 主服务器数量
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'master_num' => 1,
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// 指定从服务器序号
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'slave_no' => '',
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// 模型写入后自动读取主服务器
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'read_master' => false,
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// 是否严格检查字段是否存在
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'fields_strict' => true,
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// 数据返回类型
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'result_type' => PDO::FETCH_ASSOC,
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// 数据集返回类型
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'resultset_type' => 'array',
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// 自动写入时间戳字段
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'auto_timestamp' => false,
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// 时间字段取出后的默认时间格式
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'datetime_format' => 'Y-m-d H:i:s',
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// 是否需要进行SQL性能分析
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'sql_explain' => false,
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// Builder类
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'builder' => '',
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// Query类
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'query' => '\\think\\db\\Query',
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// 是否需要断线重连
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'break_reconnect' => false,
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];
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// PDO连接参数
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protected $params = [
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PDO::ATTR_CASE => PDO::CASE_NATURAL,
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
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PDO::ATTR_STRINGIFY_FETCHES => false,
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PDO::ATTR_EMULATE_PREPARES => false,
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];
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// 绑定参数
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protected $bind = [];
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/**
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* 构造函数 读取数据库配置信息
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* @access public
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* @param array $config 数据库配置数组
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*/
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public function __construct(array $config = [])
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{
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if (!empty($config)) {
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$this->config = array_merge($this->config, $config);
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}
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}
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/**
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* 获取新的查询对象
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* @access protected
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* @return Query
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*/
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protected function getQuery()
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{
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$class = $this->config['query'];
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return new $class($this);
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}
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/**
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* 获取当前连接器类对应的Builder类
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* @access public
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* @return string
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*/
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public function getBuilder()
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{
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if (!empty($this->builder)) {
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return $this->builder;
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} else {
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return $this->getConfig('builder') ?: '\\think\\db\\builder\\' . ucfirst($this->getConfig('type'));
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}
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}
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/**
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* 调用Query类的查询方法
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* @access public
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* @param string $method 方法名称
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* @param array $args 调用参数
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* @return mixed
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*/
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public function __call($method, $args)
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{
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return call_user_func_array([$this->getQuery(), $method], $args);
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}
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/**
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* 解析pdo连接的dsn信息
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* @access protected
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* @param array $config 连接信息
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* @return string
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*/
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abstract protected function parseDsn($config);
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/**
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* 取得数据表的字段信息
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* @access public
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* @param string $tableName
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* @return array
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*/
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abstract public function getFields($tableName);
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/**
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* 取得数据库的表信息
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* @access public
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* @param string $dbName
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* @return array
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*/
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abstract public function getTables($dbName);
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/**
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* SQL性能分析
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* @access protected
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* @param string $sql
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* @return array
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*/
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abstract protected function getExplain($sql);
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/**
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* 对返数据表字段信息进行大小写转换出来
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* @access public
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* @param array $info 字段信息
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* @return array
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*/
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public function fieldCase($info)
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{
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// 字段大小写转换
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switch ($this->attrCase) {
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case PDO::CASE_LOWER:
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$info = array_change_key_case($info);
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break;
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case PDO::CASE_UPPER:
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$info = array_change_key_case($info, CASE_UPPER);
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break;
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case PDO::CASE_NATURAL:
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default:
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// 不做转换
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}
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return $info;
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}
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/**
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* 获取数据库的配置参数
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* @access public
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* @param string $config 配置名称
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* @return mixed
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*/
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public function getConfig($config = '')
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{
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return $config ? $this->config[$config] : $this->config;
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}
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/**
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* 设置数据库的配置参数
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* @access public
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* @param string|array $config 配置名称
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* @param mixed $value 配置值
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* @return void
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*/
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public function setConfig($config, $value = '')
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{
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if (is_array($config)) {
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$this->config = array_merge($this->config, $config);
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} else {
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$this->config[$config] = $value;
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}
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}
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/**
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* 连接数据库方法
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* @access public
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* @param array $config 连接参数
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* @param integer $linkNum 连接序号
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* @param array|bool $autoConnection 是否自动连接主数据库（用于分布式）
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* @return PDO
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* @throws Exception
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*/
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public function connect(array $config = [], $linkNum = 0, $autoConnection = false)
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{
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if (!isset($this->links[$linkNum])) {
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if (!$config) {
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$config = $this->config;
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} else {
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$config = array_merge($this->config, $config);
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}
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// 连接参数
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if (isset($config['params']) && is_array($config['params'])) {
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$params = $config['params'] + $this->params;
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} else {
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$params = $this->params;
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}
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// 记录当前字段属性大小写设置
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$this->attrCase = $params[PDO::ATTR_CASE];
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// 数据返回类型
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if (isset($config['result_type'])) {
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$this->fetchType = $config['result_type'];
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}
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try {
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if (empty($config['dsn'])) {
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$config['dsn'] = $this->parseDsn($config);
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}
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if ($config['debug']) {
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$startTime = microtime(true);
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}
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$this->links[$linkNum] = new PDO($config['dsn'], $config['username'], $config['password'], $params);
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if ($config['debug']) {
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// 记录数据库连接信息
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Log::record('[ DB ] CONNECT:[ UseTime:' . number_format(microtime(true) - $startTime, 6) . 's ] ' . $config['dsn'], 'sql');
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}
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} catch (\PDOException $e) {
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if ($autoConnection) {
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Log::record($e->getMessage(), 'error');
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return $this->connect($autoConnection, $linkNum);
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} else {
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throw $e;
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}
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}
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}
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return $this->links[$linkNum];
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}
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/**
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* 释放查询结果
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* @access public
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*/
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public function free()
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{
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$this->PDOStatement = null;
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}
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/**
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* 获取PDO对象
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* @access public
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* @return \PDO|false
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*/
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public function getPdo()
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{
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if (!$this->linkID) {
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return false;
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} else {
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return $this->linkID;
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}
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}
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/**
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* 执行查询 返回数据集
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* @access public
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* @param string $sql sql指令
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* @param array $bind 参数绑定
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* @param bool $master 是否在主服务器读操作
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* @param bool $pdo 是否返回PDO对象
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* @return mixed
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* @throws PDOException
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* @throws \Exception
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*/
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public function query($sql, $bind = [], $master = false, $pdo = false)
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{
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$this->initConnect($master);
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if (!$this->linkID) {
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return false;
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}
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// 记录SQL语句
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$this->queryStr = $sql;
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if ($bind) {
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$this->bind = $bind;
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}
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Db::$queryTimes++;
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try {
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// 调试开始
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$this->debug(true);
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// 预处理
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$this->PDOStatement = $this->linkID->prepare($sql);
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// 是否为存储过程调用
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$procedure = in_array(strtolower(substr(trim($sql), 0, 4)), ['call', 'exec']);
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// 参数绑定
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if ($procedure) {
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$this->bindParam($bind);
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} else {
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$this->bindValue($bind);
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}
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// 执行查询
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$this->PDOStatement->execute();
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// 调试结束
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$this->debug(false, '', $master);
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// 返回结果集
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return $this->getResult($pdo, $procedure);
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} catch (\PDOException $e) {
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if ($this->isBreak($e)) {
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return $this->close()->query($sql, $bind, $master, $pdo);
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}
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throw new PDOException($e, $this->config, $this->getLastsql());
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} catch (\Throwable $e) {
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if ($this->isBreak($e)) {
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return $this->close()->query($sql, $bind, $master, $pdo);
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}
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throw $e;
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} catch (\Exception $e) {
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if ($this->isBreak($e)) {
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return $this->close()->query($sql, $bind, $master, $pdo);
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}
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throw $e;
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}
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}
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/**
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* 执行语句
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* @access public
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* @param string $sql sql指令
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* @param array $bind 参数绑定
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* @param Query $query 查询对象
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* @return int
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* @throws PDOException
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* @throws \Exception
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*/
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public function execute($sql, $bind = [], Query $query = null)
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{
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$this->initConnect(true);
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if (!$this->linkID) {
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return false;
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}
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// 记录SQL语句
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$this->queryStr = $sql;
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if ($bind) {
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$this->bind = $bind;
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}
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Db::$executeTimes++;
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try {
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// 调试开始
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$this->debug(true);
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// 预处理
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$this->PDOStatement = $this->linkID->prepare($sql);
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// 是否为存储过程调用
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$procedure = in_array(strtolower(substr(trim($sql), 0, 4)), ['call', 'exec']);
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// 参数绑定
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if ($procedure) {
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$this->bindParam($bind);
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} else {
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$this->bindValue($bind);
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}
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// 执行语句
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$this->PDOStatement->execute();
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// 调试结束
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$this->debug(false, '', true);
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if ($query && !empty($this->config['deploy']) && !empty($this->config['read_master'])) {
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$query->readMaster();
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}
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$this->numRows = $this->PDOStatement->rowCount();
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return $this->numRows;
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} catch (\PDOException $e) {
|
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if ($this->isBreak($e)) {
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return $this->close()->execute($sql, $bind, $query);
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}
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throw new PDOException($e, $this->config, $this->getLastsql());
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} catch (\Throwable $e) {
|
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if ($this->isBreak($e)) {
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return $this->close()->execute($sql, $bind, $query);
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}
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throw $e;
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} catch (\Exception $e) {
|
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if ($this->isBreak($e)) {
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return $this->close()->execute($sql, $bind, $query);
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}
|
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throw $e;
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}
|
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}
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|
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/**
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* 根据参数绑定组装最终的SQL语句 便于调试
|
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* @access public
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* @param string $sql 带参数绑定的sql语句
|
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* @param array $bind 参数绑定列表
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* @return string
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*/
|
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public function getRealSql($sql, array $bind = [])
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{
|
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if (is_array($sql)) {
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$sql = implode(';', $sql);
|
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}
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|
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foreach ($bind as $key => $val) {
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$value = is_array($val) ? $val[0] : $val;
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$type = is_array($val) ? $val[1] : PDO::PARAM_STR;
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if (PDO::PARAM_STR == $type) {
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$value = $this->quote($value);
|
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} elseif (PDO::PARAM_INT == $type) {
|
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$value = (float) $value;
|
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}
|
|
// 判断占位符
|
|
$sql = is_numeric($key) ?
|
|
substr_replace($sql, $value, strpos($sql, '?'), 1) :
|
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str_replace(
|
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[':' . $key . ')', ':' . $key . ',', ':' . $key . ' ', ':' . $key . PHP_EOL],
|
|
[$value . ')', $value . ',', $value . ' ', $value . PHP_EOL],
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$sql . ' ');
|
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}
|
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return rtrim($sql);
|
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}
|
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|
|
/**
|
|
* 参数绑定
|
|
* 支持 ['name'=>'value','id'=>123] 对应命名占位符
|
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* 或者 ['value',123] 对应问号占位符
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* @access public
|
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* @param array $bind 要绑定的参数列表
|
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* @return void
|
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* @throws BindParamException
|
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*/
|
|
protected function bindValue(array $bind = [])
|
|
{
|
|
foreach ($bind as $key => $val) {
|
|
// 占位符
|
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$param = is_numeric($key) ? $key + 1 : ':' . $key;
|
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if (is_array($val)) {
|
|
if (PDO::PARAM_INT == $val[1] && '' === $val[0]) {
|
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$val[0] = 0;
|
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}
|
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$result = $this->PDOStatement->bindValue($param, $val[0], $val[1]);
|
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} else {
|
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$result = $this->PDOStatement->bindValue($param, $val);
|
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}
|
|
if (!$result) {
|
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throw new BindParamException(
|
|
"Error occurred when binding parameters '{$param}'",
|
|
$this->config,
|
|
$this->getLastsql(),
|
|
$bind
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 存储过程的输入输出参数绑定
|
|
* @access public
|
|
* @param array $bind 要绑定的参数列表
|
|
* @return void
|
|
* @throws BindParamException
|
|
*/
|
|
protected function bindParam($bind)
|
|
{
|
|
foreach ($bind as $key => $val) {
|
|
$param = is_numeric($key) ? $key + 1 : ':' . $key;
|
|
if (is_array($val)) {
|
|
array_unshift($val, $param);
|
|
$result = call_user_func_array([$this->PDOStatement, 'bindParam'], $val);
|
|
} else {
|
|
$result = $this->PDOStatement->bindValue($param, $val);
|
|
}
|
|
if (!$result) {
|
|
$param = array_shift($val);
|
|
throw new BindParamException(
|
|
"Error occurred when binding parameters '{$param}'",
|
|
$this->config,
|
|
$this->getLastsql(),
|
|
$bind
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 获得数据集数组
|
|
* @access protected
|
|
* @param bool $pdo 是否返回PDOStatement
|
|
* @param bool $procedure 是否存储过程
|
|
* @return PDOStatement|array
|
|
*/
|
|
protected function getResult($pdo = false, $procedure = false)
|
|
{
|
|
if ($pdo) {
|
|
// 返回PDOStatement对象处理
|
|
return $this->PDOStatement;
|
|
}
|
|
if ($procedure) {
|
|
// 存储过程返回结果
|
|
return $this->procedure();
|
|
}
|
|
$result = $this->PDOStatement->fetchAll($this->fetchType);
|
|
$this->numRows = count($result);
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* 获得存储过程数据集
|
|
* @access protected
|
|
* @return array
|
|
*/
|
|
protected function procedure()
|
|
{
|
|
$item = [];
|
|
do {
|
|
$result = $this->getResult();
|
|
if ($result) {
|
|
$item[] = $result;
|
|
}
|
|
} while ($this->PDOStatement->nextRowset());
|
|
$this->numRows = count($item);
|
|
return $item;
|
|
}
|
|
|
|
/**
|
|
* 执行数据库事务
|
|
* @access public
|
|
* @param callable $callback 数据操作方法回调
|
|
* @return mixed
|
|
* @throws PDOException
|
|
* @throws \Exception
|
|
* @throws \Throwable
|
|
*/
|
|
public function transaction($callback)
|
|
{
|
|
$this->startTrans();
|
|
try {
|
|
$result = null;
|
|
if (is_callable($callback)) {
|
|
$result = call_user_func_array($callback, [$this]);
|
|
}
|
|
$this->commit();
|
|
return $result;
|
|
} catch (\Exception $e) {
|
|
$this->rollback();
|
|
throw $e;
|
|
} catch (\Throwable $e) {
|
|
$this->rollback();
|
|
throw $e;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 启动事务
|
|
* @access public
|
|
* @return bool|mixed
|
|
* @throws \Exception
|
|
*/
|
|
public function startTrans()
|
|
{
|
|
$this->initConnect(true);
|
|
if (!$this->linkID) {
|
|
return false;
|
|
}
|
|
|
|
++$this->transTimes;
|
|
try {
|
|
if (1 == $this->transTimes) {
|
|
$this->linkID->beginTransaction();
|
|
} elseif ($this->transTimes > 1 && $this->supportSavepoint()) {
|
|
$this->linkID->exec(
|
|
$this->parseSavepoint('trans' . $this->transTimes)
|
|
);
|
|
}
|
|
|
|
} catch (\Exception $e) {
|
|
if ($this->isBreak($e)) {
|
|
--$this->transTimes;
|
|
return $this->close()->startTrans();
|
|
}
|
|
throw $e;
|
|
} catch (\Error $e) {
|
|
if ($this->isBreak($e)) {
|
|
--$this->transTimes;
|
|
return $this->close()->startTrans();
|
|
}
|
|
throw $e;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 用于非自动提交状态下面的查询提交
|
|
* @access public
|
|
* @return void
|
|
* @throws PDOException
|
|
*/
|
|
public function commit()
|
|
{
|
|
$this->initConnect(true);
|
|
|
|
if (1 == $this->transTimes) {
|
|
$this->linkID->commit();
|
|
}
|
|
|
|
--$this->transTimes;
|
|
}
|
|
|
|
/**
|
|
* 事务回滚
|
|
* @access public
|
|
* @return void
|
|
* @throws PDOException
|
|
*/
|
|
public function rollback()
|
|
{
|
|
$this->initConnect(true);
|
|
|
|
if (1 == $this->transTimes) {
|
|
$this->linkID->rollBack();
|
|
} elseif ($this->transTimes > 1 && $this->supportSavepoint()) {
|
|
$this->linkID->exec(
|
|
$this->parseSavepointRollBack('trans' . $this->transTimes)
|
|
);
|
|
}
|
|
|
|
$this->transTimes = max(0, $this->transTimes - 1);
|
|
}
|
|
|
|
/**
|
|
* 是否支持事务嵌套
|
|
* @return bool
|
|
*/
|
|
protected function supportSavepoint()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* 生成定义保存点的SQL
|
|
* @param $name
|
|
* @return string
|
|
*/
|
|
protected function parseSavepoint($name)
|
|
{
|
|
return 'SAVEPOINT ' . $name;
|
|
}
|
|
|
|
/**
|
|
* 生成回滚到保存点的SQL
|
|
* @param $name
|
|
* @return string
|
|
*/
|
|
protected function parseSavepointRollBack($name)
|
|
{
|
|
return 'ROLLBACK TO SAVEPOINT ' . $name;
|
|
}
|
|
|
|
/**
|
|
* 批处理执行SQL语句
|
|
* 批处理的指令都认为是execute操作
|
|
* @access public
|
|
* @param array $sqlArray SQL批处理指令
|
|
* @return boolean
|
|
*/
|
|
public function batchQuery($sqlArray = [], $bind = [], Query $query = null)
|
|
{
|
|
if (!is_array($sqlArray)) {
|
|
return false;
|
|
}
|
|
// 自动启动事务支持
|
|
$this->startTrans();
|
|
try {
|
|
foreach ($sqlArray as $sql) {
|
|
$this->execute($sql, $bind, $query);
|
|
}
|
|
// 提交事务
|
|
$this->commit();
|
|
} catch (\Exception $e) {
|
|
$this->rollback();
|
|
throw $e;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* 获得查询次数
|
|
* @access public
|
|
* @param boolean $execute 是否包含所有查询
|
|
* @return integer
|
|
*/
|
|
public function getQueryTimes($execute = false)
|
|
{
|
|
return $execute ? Db::$queryTimes + Db::$executeTimes : Db::$queryTimes;
|
|
}
|
|
|
|
/**
|
|
* 获得执行次数
|
|
* @access public
|
|
* @return integer
|
|
*/
|
|
public function getExecuteTimes()
|
|
{
|
|
return Db::$executeTimes;
|
|
}
|
|
|
|
/**
|
|
* 关闭数据库（或者重新连接）
|
|
* @access public
|
|
* @return $this
|
|
*/
|
|
public function close()
|
|
{
|
|
$this->linkID = null;
|
|
$this->linkWrite = null;
|
|
$this->linkRead = null;
|
|
$this->links = [];
|
|
// 释放查询
|
|
$this->free();
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* 是否断线
|
|
* @access protected
|
|
* @param \PDOException|\Exception $e 异常对象
|
|
* @return bool
|
|
*/
|
|
protected function isBreak($e)
|
|
{
|
|
if (!$this->config['break_reconnect']) {
|
|
return false;
|
|
}
|
|
|
|
$info = [
|
|
'server has gone away',
|
|
'no connection to the server',
|
|
'Lost connection',
|
|
'is dead or not enabled',
|
|
'Error while sending',
|
|
'decryption failed or bad record mac',
|
|
'server closed the connection unexpectedly',
|
|
'SSL connection has been closed unexpectedly',
|
|
'Error writing data to the connection',
|
|
'Resource deadlock avoided',
|
|
'failed with errno',
|
|
];
|
|
|
|
$error = $e->getMessage();
|
|
|
|
foreach ($info as $msg) {
|
|
if (false !== stripos($error, $msg)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* 获取最近一次查询的sql语句
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function getLastSql()
|
|
{
|
|
return $this->getRealSql($this->queryStr, $this->bind);
|
|
}
|
|
|
|
/**
|
|
* 获取最近插入的ID
|
|
* @access public
|
|
* @param string $sequence 自增序列名
|
|
* @return string
|
|
*/
|
|
public function getLastInsID($sequence = null)
|
|
{
|
|
return $this->linkID->lastInsertId($sequence);
|
|
}
|
|
|
|
/**
|
|
* 获取返回或者影响的记录数
|
|
* @access public
|
|
* @return integer
|
|
*/
|
|
public function getNumRows()
|
|
{
|
|
return $this->numRows;
|
|
}
|
|
|
|
/**
|
|
* 获取最近的错误信息
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function getError()
|
|
{
|
|
if ($this->PDOStatement) {
|
|
$error = $this->PDOStatement->errorInfo();
|
|
$error = $error[1] . ':' . $error[2];
|
|
} else {
|
|
$error = '';
|
|
}
|
|
if ('' != $this->queryStr) {
|
|
$error .= "\n [ SQL语句 ] : " . $this->getLastsql();
|
|
}
|
|
return $error;
|
|
}
|
|
|
|
/**
|
|
* SQL指令安全过滤
|
|
* @access public
|
|
* @param string $str SQL字符串
|
|
* @param bool $master 是否主库查询
|
|
* @return string
|
|
*/
|
|
public function quote($str, $master = true)
|
|
{
|
|
$this->initConnect($master);
|
|
return $this->linkID ? $this->linkID->quote($str) : $str;
|
|
}
|
|
|
|
/**
|
|
* 数据库调试 记录当前SQL及分析性能
|
|
* @access protected
|
|
* @param boolean $start 调试开始标记 true 开始 false 结束
|
|
* @param string $sql 执行的SQL语句 留空自动获取
|
|
* @param boolean $master 主从标记
|
|
* @return void
|
|
*/
|
|
protected function debug($start, $sql = '', $master = false)
|
|
{
|
|
if (!empty($this->config['debug'])) {
|
|
// 开启数据库调试模式
|
|
if ($start) {
|
|
Debug::remark('queryStartTime', 'time');
|
|
} else {
|
|
// 记录操作结束时间
|
|
Debug::remark('queryEndTime', 'time');
|
|
$runtime = Debug::getRangeTime('queryStartTime', 'queryEndTime');
|
|
$sql = $sql ?: $this->getLastsql();
|
|
$result = [];
|
|
// SQL性能分析
|
|
if ($this->config['sql_explain'] && 0 === stripos(trim($sql), 'select')) {
|
|
$result = $this->getExplain($sql);
|
|
}
|
|
// SQL监听
|
|
$this->trigger($sql, $runtime, $result, $master);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 监听SQL执行
|
|
* @access public
|
|
* @param callable $callback 回调方法
|
|
* @return void
|
|
*/
|
|
public function listen($callback)
|
|
{
|
|
self::$event[] = $callback;
|
|
}
|
|
|
|
/**
|
|
* 触发SQL事件
|
|
* @access protected
|
|
* @param string $sql SQL语句
|
|
* @param float $runtime SQL运行时间
|
|
* @param mixed $explain SQL分析
|
|
* @param bool $master 主从标记
|
|
* @return void
|
|
*/
|
|
protected function trigger($sql, $runtime, $explain = [], $master = false)
|
|
{
|
|
if (!empty(self::$event)) {
|
|
foreach (self::$event as $callback) {
|
|
if (is_callable($callback)) {
|
|
call_user_func_array($callback, [$sql, $runtime, $explain, $master]);
|
|
}
|
|
}
|
|
} else {
|
|
// 未注册监听则记录到日志中
|
|
if ($this->config['deploy']) {
|
|
// 分布式记录当前操作的主从
|
|
$master = $master ? 'master|' : 'slave|';
|
|
} else {
|
|
$master = '';
|
|
}
|
|
|
|
Log::record('[ SQL ] ' . $sql . ' [ ' . $master . 'RunTime:' . $runtime . 's ]', 'sql');
|
|
if (!empty($explain)) {
|
|
Log::record('[ EXPLAIN : ' . var_export($explain, true) . ' ]', 'sql');
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 初始化数据库连接
|
|
* @access protected
|
|
* @param boolean $master 是否主服务器
|
|
* @return void
|
|
*/
|
|
protected function initConnect($master = true)
|
|
{
|
|
if (!empty($this->config['deploy'])) {
|
|
// 采用分布式数据库
|
|
if ($master || $this->transTimes) {
|
|
if (!$this->linkWrite) {
|
|
$this->linkWrite = $this->multiConnect(true);
|
|
}
|
|
$this->linkID = $this->linkWrite;
|
|
} else {
|
|
if (!$this->linkRead) {
|
|
$this->linkRead = $this->multiConnect(false);
|
|
}
|
|
$this->linkID = $this->linkRead;
|
|
}
|
|
} elseif (!$this->linkID) {
|
|
// 默认单数据库
|
|
$this->linkID = $this->connect();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 连接分布式服务器
|
|
* @access protected
|
|
* @param boolean $master 主服务器
|
|
* @return PDO
|
|
*/
|
|
protected function multiConnect($master = false)
|
|
{
|
|
$_config = [];
|
|
// 分布式数据库配置解析
|
|
foreach (['username', 'password', 'hostname', 'hostport', 'database', 'dsn', 'charset'] as $name) {
|
|
$_config[$name] = explode(',', $this->config[$name]);
|
|
}
|
|
|
|
// 主服务器序号
|
|
$m = floor(mt_rand(0, $this->config['master_num'] - 1));
|
|
|
|
if ($this->config['rw_separate']) {
|
|
// 主从式采用读写分离
|
|
if ($master) // 主服务器写入
|
|
{
|
|
$r = $m;
|
|
} elseif (is_numeric($this->config['slave_no'])) {
|
|
// 指定服务器读
|
|
$r = $this->config['slave_no'];
|
|
} else {
|
|
// 读操作连接从服务器 每次随机连接的数据库
|
|
$r = floor(mt_rand($this->config['master_num'], count($_config['hostname']) - 1));
|
|
}
|
|
} else {
|
|
// 读写操作不区分服务器 每次随机连接的数据库
|
|
$r = floor(mt_rand(0, count($_config['hostname']) - 1));
|
|
}
|
|
$dbMaster = false;
|
|
if ($m != $r) {
|
|
$dbMaster = [];
|
|
foreach (['username', 'password', 'hostname', 'hostport', 'database', 'dsn', 'charset'] as $name) {
|
|
$dbMaster[$name] = isset($_config[$name][$m]) ? $_config[$name][$m] : $_config[$name][0];
|
|
}
|
|
}
|
|
$dbConfig = [];
|
|
foreach (['username', 'password', 'hostname', 'hostport', 'database', 'dsn', 'charset'] as $name) {
|
|
$dbConfig[$name] = isset($_config[$name][$r]) ? $_config[$name][$r] : $_config[$name][0];
|
|
}
|
|
return $this->connect($dbConfig, $r, $r == $m ? false : $dbMaster);
|
|
}
|
|
|
|
/**
|
|
* 析构方法
|
|
* @access public
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
// 释放查询
|
|
if ($this->PDOStatement) {
|
|
$this->free();
|
|
}
|
|
// 关闭连接
|
|
$this->close();
|
|
}
|
|
}
|