Page Speed Optimization Libraries
1.7.30.4
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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 00021 00022 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_BEACON_CRITICAL_LINE_INFO_FINDER_H_ 00023 #define NET_INSTAWEB_REWRITER_PUBLIC_BEACON_CRITICAL_LINE_INFO_FINDER_H_ 00024 00025 #include "net/instaweb/rewriter/public/critical_line_info_finder.h" 00026 00027 #include "net/instaweb/rewriter/public/critical_finder_support_util.h" 00028 #include "net/instaweb/util/public/basictypes.h" 00029 #include "net/instaweb/util/public/property_cache.h" 00030 #include "pagespeed/kernel/base/string_util.h" 00031 00032 namespace net_instaweb { 00033 00034 class MessageHandler; 00035 class NonceGenerator; 00036 class RewriteDriver; 00037 class Timer; 00038 00059 class BeaconCriticalLineInfoFinder : public CriticalLineInfoFinder { 00060 public: 00061 static const char kBeaconCriticalLineInfoPropertyName[]; 00062 00063 BeaconCriticalLineInfoFinder(const PropertyCache::Cohort* cohort, 00064 NonceGenerator* nonce_generator); 00065 virtual ~BeaconCriticalLineInfoFinder(); 00066 00067 virtual BeaconMetadata PrepareForBeaconInsertion(RewriteDriver* driver); 00068 00072 static void WriteXPathsToPropertyCacheFromBeacon( 00073 const StringSet& xpaths_set, StringPiece nonce, 00074 const PropertyCache* cache, const PropertyCache::Cohort* cohort, 00075 AbstractPropertyPage* page, MessageHandler* message_handler, 00076 Timer* timer); 00077 00078 protected: 00080 virtual void UpdateInDriver(RewriteDriver* driver); 00081 00082 private: 00083 static const int kDefaultSupportInterval = 10; 00084 00085 virtual int SupportInterval() const { return kDefaultSupportInterval; } 00086 00087 NonceGenerator* nonce_generator_; 00088 DISALLOW_COPY_AND_ASSIGN(BeaconCriticalLineInfoFinder); 00089 }; 00090 00091 } 00092 00093 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_BEACON_CRITICAL_LINE_INFO_FINDER_H_