在cli下运行消费数据，需要保持redis断线重连，虽然redis可以直接传递参数长连接，但是如果redis服务器异常关闭后再重启则需要重启php脚本，比较麻烦，所以写了一个redis断线重连简单版。
<?php
class PRedis
{
/**
* options
* @var array
*/
protected $options = ['host' => '127.0.0.1', 'port' => 6379, 'password' => '', 'select' => 0, 'timeout' => 0, 'expire' => 0, 'persistent' => false, 'prefix' => ''];
/**
* handler
* @var null
*/
protected $handler = null;
/**
* Redis constructor.
* @param array $options
* @throws Exception
*/
public function __construct($options = [])
{
$this->options = array_merge($this->options, $options);
$this->connect(false);
}
/**
* connect
* @param $throw
* @throws RedisException
*/
protected function connect($throw = true)
{
try {
$this->handler = new \Redis();
if ($this->options['persistent']) {
$this->handler->pconnect($this->options['host'], $this->options['port'], $this->options['timeout'], 'persistent_id_' . $this->options['select']);
} else {
$this->handler->connect($this->options['host'], $this->options['port'], $this->options['timeout']);
}
if ('' != $this->options['password']) {
$this->handler->auth($this->options['password']);
}
if (0 != $this->options['select']) {
$this->handler->select($this->options['select']);
}
} catch (\RedisException$exception) {
if ($throw) {
throw $exception;
}
}
}
/**
* __call
* @param $name
* @param $args
* @return mixed
* @throws
*/
public function __call($name, $args)
{
try {
set_error_handler(function ($errno, $errStr) {
restore_error_handler();
throw new RedisException($errStr, $errno);
});
return $this->handler->{$name}(...$args);
} catch (\RedisException$exception) {
echo "断线重连:" . $exception->getMessage() . PHP_EOL;
$this->connect(false);
return false;
}
}
}
$redis = new PRedis();
$redisKey = 'key';
while (true) {
//set
$redis->set($redisKey, rand(1, 99));
//get
$value = $redis->get($redisKey);
if ($value) {
echo $value . PHP_EOL;
}
//sleep
sleep(1);
}可以在断线重连异常中适当ping()来决定是否真正去连接，并且建议增加间隔多久连接一次。tp中mysql的断线重连是依赖于错误信息的关键字，或许在redis中断线重连也可以参考，毕竟异常不一定都是redis断开连接，可以从异常信息中提取关键字来精确分析，当然ping一下更简单。也没有来得及去看redis官方文档说明，凑合能用。
