Page Speed Optimization Libraries  1.4.26.1
net/instaweb/automatic/public/blink_flow_critical_line.h
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00001 /*
00002  * Copyright 2012 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_AUTOMATIC_PUBLIC_BLINK_FLOW_CRITICAL_LINE_H_
00020 #define NET_INSTAWEB_AUTOMATIC_PUBLIC_BLINK_FLOW_CRITICAL_LINE_H_
00021 
00022 #include "net/instaweb/util/public/basictypes.h"
00023 #include "net/instaweb/util/public/google_url.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 AsyncFetch;
00031 class BlinkCriticalLineData;
00032 class BlinkCriticalLineDataFinder;
00033 class LogRecord;
00034 class PropertyPage;
00035 class ProxyFetchPropertyCallbackCollector;
00036 class ProxyFetchFactory;
00037 class ServerContext;
00038 class RewriteOptions;
00039 class Statistics;
00040 class TimedVariable;
00041 
00045 class BlinkFlowCriticalLine {
00046  public:
00047   class LogHelper;
00048 
00051   static const char kBackgroundComputationDone[];
00052   static const char kUpdateResponseCodeDone[];
00053 
00054   static void Start(const GoogleString& url,
00055                     AsyncFetch* base_fetch,
00056                     RewriteOptions* options,
00057                     ProxyFetchFactory* factory,
00058                     ServerContext* manager,
00059                     ProxyFetchPropertyCallbackCollector* property_callback);
00060 
00061   virtual ~BlinkFlowCriticalLine();
00062 
00063   static void InitStats(Statistics* statistics);
00064 
00065   static const char kNumBlinkHtmlCacheHits[];
00066   static const char kNumBlinkHtmlCacheMisses[];
00067   static const char kNumBlinkSharedFetchesStarted[];
00068   static const char kNumBlinkSharedFetchesCompleted[];
00069   static const char kNumComputeBlinkCriticalLineDataCalls[];
00070   static const char kNumBlinkHtmlMatches[];
00071   static const char kNumBlinkHtmlMismatches[];
00072   static const char kNumBlinkHtmlMismatchesCacheDeletes[];
00073   static const char kNumBlinkHtmlSmartdiffMatches[];
00074   static const char kNumBlinkHtmlSmartdiffMismatches[];
00075 
00076  private:
00077   BlinkFlowCriticalLine(const GoogleString& url,
00078                         AsyncFetch* base_fetch,
00079                         RewriteOptions* options,
00080                         ProxyFetchFactory* factory,
00081                         ServerContext* manager,
00082                         ProxyFetchPropertyCallbackCollector* property_callback);
00083 
00085   void SetStartRequestTimings();
00086 
00088   void SetResponseStartTime();
00089 
00093   void BlinkCriticalLineDataLookupDone(
00094       ProxyFetchPropertyCallbackCollector* collector);
00095 
00098   void BlinkCriticalLineDataHit();
00099 
00102   void BlinkCriticalLineDataMiss();
00103 
00108   void TriggerProxyFetch(bool critical_line_data_found,
00109                          bool serve_non_critical);
00110 
00111   void WriteResponseStartAndLookUpTimings();
00112 
00116   void ServeAllPanelContents();
00117 
00121   void ServeCriticalPanelContents();
00122 
00124   void SendCriticalHtml(const GoogleString& critical_json_str);
00125 
00127   void SendInlineImagesJson(const GoogleString& pushed_images_str);
00128 
00130   void SendNonCriticalJson(GoogleString* non_critical_json_str);
00131 
00133   void SendLazyloadImagesJs();
00134 
00135   void WriteString(const StringPiece& str);
00136 
00137   int64 GetTimeElapsedFromStartRequest();
00138 
00139   GoogleString GetAddTimingScriptString(const GoogleString& timing_str,
00140                                         int64 time_ms);
00141 
00142   void Flush();
00143 
00146   void SetFilterOptions(RewriteOptions* options) const;
00147 
00149   bool IsLastResponseCodeInvalid(PropertyPage* page);
00150 
00151   GoogleString url_;
00152   GoogleUrl google_url_;
00153   GoogleString critical_html_;
00154   AsyncFetch* base_fetch_;
00157   scoped_ptr<LogRecord> blink_log_record_;
00158   RewriteOptions* options_;
00159   ProxyFetchFactory* factory_;
00160   ServerContext* manager_;
00161   ProxyFetchPropertyCallbackCollector* property_callback_;
00162   scoped_ptr<BlinkCriticalLineData> blink_critical_line_data_;
00163   BlinkCriticalLineDataFinder* finder_;
00164   int64 request_start_time_ms_;
00165   int64 time_to_start_blink_flow_critical_line_ms_;
00166   int64 time_to_critical_line_data_look_up_done_ms_;
00167   scoped_ptr<LogHelper> blink_log_helper_;
00168 
00169   TimedVariable* num_blink_html_cache_hits_;
00170   TimedVariable* num_blink_shared_fetches_started_;
00171 
00172   DISALLOW_COPY_AND_ASSIGN(BlinkFlowCriticalLine);
00173 };
00174 
00175 }  
00176 
00177 #endif  ///< NET_INSTAWEB_AUTOMATIC_PUBLIC_BLINK_FLOW_CRITICAL_LINE_H_
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