Laravel金沙国际官网读写分离配置的方法

 更新时间:2019年10月13日 10:18:05   作者:wan353694124   我要评论
今天小编就为大家分享一篇Laravel金沙国际官网读写分离配置的方法,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧

配置范例

'mysql' => [
 'driver' => 'mysql', 
 'write' => [ 
 'host' => '192.168.1.180', 
 ], 
 'read' => [
 ['host' => '192.168.1.182'], 
 ['host' => '192.168.1.179'], 
 ],
 ... 
]

'mysql' => [
 'driver' => 'mysql', 
 'write' => [ 
 'host' => '192.168.1.180', 
 ], 
 'read' => [
 'host' => [
 '192.168.1.182',
 '192.168.1.179'
 ], 
 ],
 ... 
]

扩展配置范例

'mysql' => [
 'driver' => 'mysql', 
 'write' => [ 
 'host' => '192.168.1.180', 
 'username' => 'write',
 'password' => 'write',
 ], 
 'read' => [
 [
 'host' => '192.168.1.182',
 'username' => 'read1',
 'password' => 'read1',
 ], 
 [
 'host' => '192.168.1.179',
 'username' => 'read2',
 'password' => 'read2',
 ], 
 ],
 ... 
]

或者

'mysql' => [
 'driver' => 'mysql', 
 'write' => [ 
 'host' => '192.168.1.180', 
 'username' => 'write',
 'password' => 'write',
 ], 
 'read' => [
 'host' => [
 '192.168.1.179',
 '192.168.1.182',
 ],
 'username' => 'read',
 'password' => 'read', 
 ],
 ... 
]

公司金沙国际官网架构为一主多从,从库访问地址为唯一地址,该处方便负载均衡及扩展从库。所以最终线上采用的配置

'mysql' => [
 'driver' => 'mysql', 
 'write' => [ 
 'host' => '192.168.1.180', 
 'username' => 'write',
 'password' => 'write',
 ], 
 'read' => [
 'host' => '192.168.1.179'
 'username' => 'read',
 'password' => 'read', 
 ],
 ... 
]

代码分析

授人以鱼不如授人以渔,之所以配置如此灵活的原因,以及如何查找到这些配置方式。主要通过查找代码,分析代码;相关代码都在下面粘出,这里就不做解释了,代码能说明一切;

路径:vendor/laravel/framework/src/Illuminate/Database/Connectors/ConnectionFactory.php

代码:

class ConnectionFactory
{
 ...
 /**
 * Get the read configuration for a read / write connection.
 *
 * @param array $config
 * @return array
 */
 protected function getReadConfig(array $config)
 {
 $readConfig = $this->getReadWriteConfig($config, 'read');
 if (isset($readConfig['host']) && is_array($readConfig['host'])) {
 $readConfig['host'] = count($readConfig['host']) > 1
 ? $readConfig['host'][array_rand($readConfig['host'])]
 : $readConfig['host'][0];
 }
 return $this->mergeReadWriteConfig($config, $readConfig);
 }
 ...
 /**
 * Get a read / write level configuration.
 *
 * @param array $config
 * @param string $type
 * @return array
 */
 protected function getReadWriteConfig(array $config, $type)
 {
 if (isset($config[$type][0])) {
 return $config[$type][array_rand($config[$type])];
 }
 return $config[$type];
 }
 ...
 /**
 * Merge a configuration for a read / write connection.
 *
 * @param array $config
 * @param array $merge
 * @return array
 */
 protected function mergeReadWriteConfig(array $config, array $merge)
 {
 return Arr::except(array_merge($config, $merge), ['read', 'write']);
 }
 ...
}
 
class Arr
{
 ...
 /**
 * Get all of the given array except for a specified array of items.
 *
 * @param array $array
 * @param array|string $keys
 * @return array
 */
 public static function except($array, $keys)
 {
 static::forget($array, $keys);
 return $array;
 }
 ...
 /**
 * Remove one or many array items from a given array using "dot" notation.
 *
 * @param array $array
 * @param array|string $keys
 * @return void
 */
 public static function forget(&$array, $keys)
 {
 $original = &$array;
 $keys = (array) $keys;
 if (count($keys) === 0) {
 return;
 }
 foreach ($keys as $key) {
 $parts = explode('.', $key);
 while (count($parts) > 1) {
 $part = array_shift($parts);
 if (isset($array[$part]) && is_array($array[$part])) {
  $array = &$array[$part];
 } else {
  $parts = [];
 }
 }
 unset($array[array_shift($parts)]);
 // clean up after each pass
 $array = &$original;
 }
 }
 ...
}

以上这篇Laravel金沙国际官网读写分离配置的方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持澳门金沙网上娱乐。

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