Page Speed Optimization Libraries  1.6.29.3
net/instaweb/util/public/threadsafe_cache.h
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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   }
00044   virtual ~ThreadsafeCache();
00045 
00046   virtual void Get(const GoogleString& key, Callback* callback);
00047   virtual void Put(const GoogleString& key, SharedString* value);
00048   virtual void Delete(const GoogleString& key);
00049   virtual CacheInterface* Backend() { return cache_; }
00050   virtual bool IsBlocking() const { return cache_->IsBlocking(); }
00051   virtual bool IsHealthy() const;
00052   virtual void ShutDown();
00053 
00054   static GoogleString FormatName(StringPiece cache);
00055   virtual GoogleString Name() const { return FormatName(cache_->Name()); }
00056 
00057  private:
00058   CacheInterface* cache_;
00059   scoped_ptr<AbstractMutex> mutex_;
00060 
00061   DISALLOW_COPY_AND_ASSIGN(ThreadsafeCache);
00062 };
00063 
00064 }  
00065 
00066 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_THREADSAFE_CACHE_H_
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