晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : /home/stando/www/wp-content/plugins/w3-total-cache/Enterprise_SnsBase.php
<?php
namespace W3TC;

if ( !defined( 'W3TC_SKIPLIB_AWS' ) ) {
	require_once W3TC_LIB_DIR . '/Aws/aws-autoloader.php';
}



/**
 * Base class for Sns communication
 */
class Enterprise_SnsBase {
	/**
	 * PHP5-style constructor
	 */
	function __construct() {
		$this->_config = Dispatcher::config();

		$this->_region = $this->_config->get_string( 'cluster.messagebus.sns.region' );
		$this->_topic_arn = $this->_config->get_string( 'cluster.messagebus.sns.topic_arn' );
		$this->_api_key = $this->_config->get_string( 'cluster.messagebus.sns.api_key' );
		$this->_api_secret = $this->_config->get_string( 'cluster.messagebus.sns.api_secret' );

		$this->_debug = $this->_config->get_boolean( 'cluster.messagebus.debug' );
		$this->_api = null;
	}

	/**
	 * Returns API object
	 *
	 * @throws Exception
	 * @return AmazonSNS
	 */
	protected function _get_api() {
		if ( is_null( $this->_api ) ) {
			if ( $this->_api_key == '' )
				throw new \Exception( 'API Key is not configured' );
			if ( $this->_api_secret == '' )
				throw new \Exception( 'API Secret is not configured' );


			$credentials = new \Aws\Credentials\Credentials(
				$this->_api_key, $this->_api_secret );

			$this->_api = new \Aws\Sns\SnsClient( array(
				'credentials' => $credentials,
				'region' => $this->_region,
				'version' => '2010-03-31'
			) );
		}

		return $this->_api;
	}

	/**
	 * Write log entry
	 *
	 * @param string  $message
	 * @param array   $backtrace
	 * @return bool|int
	 */
	protected function _log( $message, $backtrace = null ) {
		if ( !$this->_debug )
			return true;

		$data = sprintf( "[%s] %s\n", date( 'r' ), $message );
		if ( $backtrace ) {
			$debug = print_r( $backtrace, true );
			$data .= $debug . "\n";
		}
		$data = strtr( $data, '<>', '..' );

		$filename = Util_Debug::log_filename( 'sns' );

		return @file_put_contents( $filename, $data, FILE_APPEND );
	}
}

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