Page Speed Optimization Libraries  1.7.30.3
net/instaweb/http/public/write_through_http_cache.h
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00001 /*
00002  * Copyright 2011 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_HTTP_PUBLIC_WRITE_THROUGH_HTTP_CACHE_H_
00020 #define NET_INSTAWEB_HTTP_PUBLIC_WRITE_THROUGH_HTTP_CACHE_H_
00021 
00022 #include <cstddef>
00023 
00024 #include "net/instaweb/http/public/http_cache.h"
00025 #include "net/instaweb/util/public/basictypes.h"
00026 #include "net/instaweb/util/public/scoped_ptr.h"
00027 #include "net/instaweb/util/public/string.h"
00028 #include "pagespeed/kernel/base/string_util.h"
00029 
00030 namespace net_instaweb {
00031 
00032 class CacheInterface;
00033 class Hasher;
00034 class HTTPValue;
00035 class MessageHandler;
00036 class Statistics;
00037 class Timer;
00038 
00040 class WriteThroughHTTPCache : public HTTPCache {
00041  public:
00042   static const size_t kUnlimited;
00043 
00045   WriteThroughHTTPCache(CacheInterface* cache1, CacheInterface* cache2,
00046                         Timer* timer, Hasher* hasher, Statistics* statistics);
00047 
00048   virtual ~WriteThroughHTTPCache();
00049 
00051   virtual void SetIgnoreFailurePuts();
00052 
00054   virtual void Find(const GoogleString& key, MessageHandler* handler,
00055                     Callback* callback);
00056 
00058   virtual void Delete(const GoogleString& key);
00059 
00061   virtual void set_force_caching(bool force);
00062 
00064   virtual void set_hasher(Hasher* hasher) {
00065     cache1_->set_hasher(hasher);
00066     cache2_->set_hasher(hasher);
00067   }
00068 
00070   virtual void set_disable_html_caching_on_https(bool x);
00071 
00073   virtual void set_remember_not_cacheable_ttl_seconds(int64 value);
00074 
00076   virtual void set_remember_fetch_failed_ttl_seconds(int64 value);
00077 
00079   virtual void set_remember_fetch_dropped_ttl_seconds(int64 value);
00080 
00082   virtual void set_max_cacheable_response_content_length(int64 value);
00083 
00085   virtual void RememberNotCacheable(const GoogleString& key,
00086                                     bool is_200_status_code,
00087                                     MessageHandler * handler);
00088 
00090   virtual void RememberFetchFailed(const GoogleString& key,
00091                                    MessageHandler * handler);
00092 
00094   virtual void RememberFetchDropped(const GoogleString& key,
00095                                     MessageHandler * handler);
00096 
00101   void set_cache1_limit(size_t limit) { cache1_size_limit_ = limit; }
00102   size_t cache1_limit() const { return cache1_size_limit_; }
00103 
00104   virtual GoogleString Name() const {
00105     return FormatName(cache1_->Name(), cache2_->Name());
00106   }
00107   static GoogleString FormatName(StringPiece l1, StringPiece l2);
00108 
00109  protected:
00111   virtual void PutInternal(const GoogleString& key, int64 start_us,
00112                            HTTPValue* value);
00113 
00114  private:
00115   void PutInCache1(const GoogleString& key, HTTPValue* value);
00116 
00117   scoped_ptr<HTTPCache> cache1_;
00118   scoped_ptr<HTTPCache> cache2_;
00119   size_t cache1_size_limit_;
00120   GoogleString name_;
00121 
00122   DISALLOW_COPY_AND_ASSIGN(WriteThroughHTTPCache);
00123 };
00124 
00125 }  
00126 
00127 #endif  ///< NET_INSTAWEB_HTTP_PUBLIC_WRITE_THROUGH_HTTP_CACHE_H_
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