symfony2中對於注入的進一步理解
1.首先在appBundle裡面的services.yml中寫服務的名字，class以及要注入的引數
app.redis_service:
class: AppBundle\Service\RedisService
arguments: ['@snc_redis.data']
舉個例子
我在控制器中可能會寫
$redis = $this->container->get('snc_redis.data');
這時候我就需要將snc_redis.data為引數傳入其中，然後將redis作為services裡面的變數，注入到__construct中
例子：
protected $redis;
function __construct($redis)
{
$this->redis = $redis;
}
/**
* 從redis獲取資料
*/
public function getCacheData($key)
{
return json_decode($this->redis->get($key));
}
/**
* 存入資料到redis
*/
public function setCacheData($key, $values, $lifeTime = 1200)
{
$this->redis->set($key,json_encode($values));
$this->redis->expire($key,$lifeTime);
}
這樣services就寫好了。
3.再控制的使用
$cacheService = $this->get('app.redis_service');
$paymentList = $cacheService->getCacheData('sy_payment');
if (!isset($paymentList)) {
$paymentData = $paymentService->getList();
$paymentHashData = array();
foreach ($paymentData as $payment) {
$paymentHashData[$payment['id']] = $payment;
}
$cacheService->setCacheData('sy_payment', $paymentHashData);
$paymentList = $cacheService->getCacheData('sy_payment');
}