Page Speed Optimization Libraries
1.3.25.1
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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 00018 00019 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_CSS_FINDER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_CSS_FINDER_H_ 00021 00022 #include "net/instaweb/util/public/basictypes.h" 00023 #include "net/instaweb/util/public/string_util.h" 00024 00025 namespace net_instaweb { 00026 00027 class PropertyValue; 00028 class RewriteDriver; 00029 class Statistics; 00030 class TimedVariable; 00031 00033 class CriticalCssFinder { 00034 public: 00035 static const char kCriticalCssValidCount[]; 00036 static const char kCriticalCssExpiredCount[]; 00037 static const char kCriticalCssNotFoundCount[]; 00038 00039 explicit CriticalCssFinder(Statistics* stats); 00040 virtual ~CriticalCssFinder(); 00041 00042 static void InitStats(Statistics* statistics); 00043 00045 virtual StringStringMap* CriticalCssMap(RewriteDriver* driver); 00046 00048 virtual void ComputeCriticalCss(StringPiece url, RewriteDriver* driver) = 0; 00049 00051 virtual bool UpdateCache(RewriteDriver* driver, 00052 const StringStringMap& critical_css_map); 00053 00054 virtual const char* GetCohort() const = 0; 00055 00056 protected: 00057 PropertyValue* GetPropertyValue(RewriteDriver* driver); 00058 00059 private: 00060 static const char kCriticalCssPropertyName[]; 00061 00063 StringStringMap* DeserializeCacheData(RewriteDriver* driver, 00064 const PropertyValue* property_value); 00065 00066 TimedVariable* critical_css_valid_count_; 00067 TimedVariable* critical_css_expired_count_; 00068 TimedVariable* critical_css_not_found_count_; 00069 00070 DISALLOW_COPY_AND_ASSIGN(CriticalCssFinder); 00071 }; 00072 00073 } 00074 00075 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_CSS_FINDER_H_