Page Speed Optimization Libraries
1.4.26.1
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00001 /* 00002 * Copyright 2010 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00018 00019 #ifndef NET_INSTAWEB_UTIL_PUBLIC_THREADSAFE_CACHE_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_THREADSAFE_CACHE_H_ 00021 00022 #include "net/instaweb/util/public/basictypes.h" 00023 #include "net/instaweb/util/public/cache_interface.h" 00024 #include "net/instaweb/util/public/scoped_ptr.h" 00025 #include "net/instaweb/util/public/string.h" 00026 #include "net/instaweb/util/public/string_util.h" 00027 00028 namespace net_instaweb { 00029 00030 class AbstractMutex; 00031 class SharedString; 00032 00037 class ThreadsafeCache : public CacheInterface { 00038 public: 00040 ThreadsafeCache(CacheInterface* cache, AbstractMutex* mutex) 00041 : cache_(cache), 00042 mutex_(mutex), 00043 name_(StrCat("ThreadsafeCache using ", cache_->Name())) { 00044 } 00045 virtual ~ThreadsafeCache(); 00046 00047 virtual void Get(const GoogleString& key, Callback* callback); 00048 virtual void Put(const GoogleString& key, SharedString* value); 00049 virtual void Delete(const GoogleString& key); 00050 virtual const char* Name() const { return name_.c_str(); } 00051 virtual CacheInterface* Backend() { return cache_.get(); } 00052 virtual bool IsBlocking() const { return cache_->IsBlocking(); } 00053 virtual bool IsHealthy() const; 00054 virtual void ShutDown(); 00055 00056 private: 00057 scoped_ptr<CacheInterface> cache_; 00058 scoped_ptr<AbstractMutex> mutex_; 00059 GoogleString name_; 00060 00061 DISALLOW_COPY_AND_ASSIGN(ThreadsafeCache); 00062 }; 00063 00064 } 00065 00066 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_THREADSAFE_CACHE_H_