Page Speed Optimization Libraries  1.6.29.3
net/instaweb/util/public/fallback_property_page.h
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00001 /*
00002  * Copyright 2013 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 
00023 
00024 #ifndef NET_INSTAWEB_UTIL_PUBLIC_FALLBACK_PROPERTY_PAGE_H_
00025 #define NET_INSTAWEB_UTIL_PUBLIC_FALLBACK_PROPERTY_PAGE_H_
00026 
00027 #include "net/instaweb/util/public/basictypes.h"
00028 #include "net/instaweb/util/public/scoped_ptr.h"
00029 #include "net/instaweb/util/public/cache_interface.h"
00030 #include "net/instaweb/util/public/property_cache.h"
00031 #include "net/instaweb/util/public/string.h"
00032 #include "net/instaweb/util/public/string_util.h"
00033 
00034 namespace net_instaweb {
00035 
00036 class FallbackPropertyPage : public AbstractPropertyPage {
00037  public:
00039   FallbackPropertyPage(PropertyPage* actual_property_page,
00040                        PropertyPage* property_page_with_fallback_values);
00041   virtual ~FallbackPropertyPage();
00042 
00045   virtual PropertyValue* GetProperty(
00046       const PropertyCache::Cohort* cohort,
00047       const StringPiece& property_name);
00048 
00051   PropertyValue* GetFallbackProperty(
00052         const PropertyCache::Cohort* cohort,
00053         const StringPiece& property_name);
00054 
00057   virtual void UpdateValue(
00058       const PropertyCache::Cohort* cohort, const StringPiece& property_name,
00059       const StringPiece& value);
00060 
00063   virtual void WriteCohort(const PropertyCache::Cohort* cohort);
00064 
00066   virtual CacheInterface::KeyState GetCacheState(
00067       const PropertyCache::Cohort* cohort);
00068 
00070   virtual CacheInterface::KeyState GetFallbackCacheState(
00071         const PropertyCache::Cohort* cohort);
00072 
00074   virtual void DeleteProperty(const PropertyCache::Cohort* cohort,
00075                               const StringPiece& property_name);
00076 
00077   virtual const GoogleString& key() const;
00078 
00079   PropertyPage* actual_property_page() { return actual_property_page_.get(); }
00080   PropertyPage* property_page_with_fallback_values() {
00081     return property_page_with_fallback_values_.get();
00082   }
00083 
00084  private:
00085   scoped_ptr<PropertyPage> actual_property_page_;
00086   scoped_ptr<PropertyPage> property_page_with_fallback_values_;
00087   DISALLOW_COPY_AND_ASSIGN(FallbackPropertyPage);
00088 };
00089 
00090 }  
00091 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_FALLBACK_PROPERTY_PAGE_H_
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