| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Author: jmarantz@google.com (Joshua Marantz) |
| |
| #include "pagespeed/kernel/cache/lru_cache.h" |
| |
| #include <cstddef> |
| #include "pagespeed/kernel/base/cache_interface.h" |
| #include "pagespeed/kernel/base/shared_string.h" |
| #include "pagespeed/kernel/base/string.h" |
| |
| namespace net_instaweb { |
| |
| LRUCache::LRUCache(size_t max_size) |
| : base_(max_size, &value_helper_), |
| is_healthy_(true) { |
| ClearStats(); |
| } |
| |
| LRUCache::~LRUCache() { |
| Clear(); |
| } |
| |
| void LRUCache::Get(const GoogleString& key, Callback* callback) { |
| if (!is_healthy_) { |
| ValidateAndReportResult(key, kNotFound, callback); |
| return; |
| } |
| KeyState key_state = kNotFound; |
| SharedString* value = base_.GetFreshen(key); |
| if (value != NULL) { |
| key_state = kAvailable; |
| *callback->value() = *value; |
| } |
| ValidateAndReportResult(key, key_state, callback); |
| } |
| |
| void LRUCache::Put(const GoogleString& key, SharedString* new_value) { |
| if (!is_healthy_) { |
| return; |
| } |
| |
| base_.Put(key, new_value); |
| } |
| |
| void LRUCache::Delete(const GoogleString& key) { |
| if (!is_healthy_) { |
| return; |
| } |
| |
| base_.Delete(key); |
| } |
| |
| void LRUCache::DeleteWithPrefixForTesting(StringPiece prefix) { |
| if (!is_healthy_) { |
| return; |
| } |
| |
| base_.DeleteWithPrefixForTesting(prefix); |
| } |
| |
| } // namespace net_instaweb |