74 lines
2.6 KiB
PHP
74 lines
2.6 KiB
PHP
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<?php
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/**
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* Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License").
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* You may not use this file except in compliance with the License.
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* A copy of the License is located at
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*
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* http://aws.amazon.com/apache2.0
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*
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* or in the "license" file accompanying this file. This file is distributed
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* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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namespace Aws\Common\Credentials;
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use Guzzle\Cache\CacheAdapterInterface;
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/**
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* Credentials decorator used to implement caching credentials
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*/
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class CacheableCredentials extends AbstractRefreshableCredentials
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{
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/**
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* @var CacheAdapterInterface Cache adapter used to store credentials
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*/
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protected $cache;
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/**
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* @var string Cache key used to store the credentials
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*/
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protected $cacheKey;
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/**
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* CacheableCredentials is a decorator that decorates other credentials
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*
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* @param CredentialsInterface $credentials Credentials to adapt
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* @param CacheAdapterInterface $cache Cache to use to store credentials
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* @param string $cacheKey Cache key of the credentials
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*/
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public function __construct(CredentialsInterface $credentials, CacheAdapterInterface $cache, $cacheKey)
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{
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$this->credentials = $credentials;
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$this->cache = $cache;
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$this->cacheKey = $cacheKey;
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}
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/**
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* Attempt to get new credentials from cache or from the adapted object
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*/
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protected function refresh()
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{
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if (!$cache = $this->cache->fetch($this->cacheKey)) {
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// The credentials were not found, so try again and cache if new
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$this->credentials->getAccessKeyId();
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if (!$this->credentials->isExpired()) {
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// The credentials were updated, so cache them
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$this->cache->save($this->cacheKey, $this->credentials, $this->credentials->getExpiration() - time());
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}
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} else {
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// The credentials were found in cache, so update the adapter object
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// if the cached credentials are not expired
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if (!$cache->isExpired()) {
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$this->credentials->setAccessKeyId($cache->getAccessKeyId());
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$this->credentials->setSecretKey($cache->getSecretKey());
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$this->credentials->setSecurityToken($cache->getSecurityToken());
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$this->credentials->setExpiration($cache->getExpiration());
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}
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}
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}
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}
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