Page Speed Optimization Libraries
1.6.29.3
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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_HTTP_PUBLIC_REQUEST_CONTEXT_H_ 00020 #define NET_INSTAWEB_HTTP_PUBLIC_REQUEST_CONTEXT_H_ 00021 00022 #include "net/instaweb/util/public/basictypes.h" 00023 #include "net/instaweb/util/public/ref_counted_ptr.h" 00024 #include "net/instaweb/util/public/scoped_ptr.h" 00025 #include "net/instaweb/util/public/string_util.h" 00026 00027 namespace net_instaweb { 00028 00029 class AbstractLogRecord; 00030 class AbstractMutex; 00031 class RequestContext; 00032 class RequestTrace; 00033 class ThreadSystem; 00034 class Timer; 00035 00036 typedef RefCountedPtr<RequestContext> RequestContextPtr; 00037 00045 class RequestContext : public RefCounted<RequestContext> { 00046 public: 00048 enum SplitRequestType { 00049 SPLIT_FULL, 00050 SPLIT_ABOVE_THE_FOLD, 00051 SPLIT_BELOW_THE_FOLD, 00052 }; 00053 00059 explicit RequestContext(AbstractMutex* logging_mutex, Timer* timer); 00060 00063 static RequestContextPtr NewTestRequestContext(ThreadSystem* thread_system) { 00064 return NewTestRequestContextWithTimer(thread_system, NULL); 00065 } 00066 static RequestContextPtr NewTestRequestContextWithTimer( 00067 ThreadSystem* thread_system, Timer* timer); 00068 static RequestContextPtr NewTestRequestContext(AbstractLogRecord* log_record); 00069 00073 virtual AbstractLogRecord* NewSubordinateLogRecord( 00074 AbstractMutex* logging_mutex); 00075 00080 RequestTrace* root_trace_context() { return root_trace_context_.get(); } 00082 void set_root_trace_context(RequestTrace* x); 00083 00094 virtual RequestTrace* CreateDependentTraceContext(const StringPiece& label) { 00095 return NULL; 00096 } 00097 00109 virtual void ReleaseDependentTraceContext(RequestTrace* t); 00110 00112 virtual AbstractLogRecord* log_record(); 00113 00115 bool using_spdy() const { return using_spdy_; } 00116 void set_using_spdy(bool x) { using_spdy_ = x; } 00117 00119 SplitRequestType split_request_type() const { 00120 return split_request_type_; 00121 } 00122 void set_split_request_type(SplitRequestType type) { 00123 split_request_type_ = type; 00124 } 00125 00129 void PrepareLogRecordForOutput(); 00130 00132 void WriteBackgroundRewriteLog(); 00133 00136 AbstractLogRecord* GetBackgroundRewriteLog( 00137 ThreadSystem* thread_system, 00138 bool log_urls, 00139 bool log_url_indices, 00140 int max_rewrite_info_log_size); 00141 00156 class TimingInfo { 00157 public: 00161 TimingInfo(Timer* timer, AbstractMutex* mutex); 00162 00166 void RequestStarted(); 00167 00170 void ProcessingStarted() { SetToNow(&processing_start_ts_ms_); } 00171 00173 void ParsingStarted() { SetToNow(&parsing_start_ts_ms_); } 00174 00176 void FirstByteReturned(); 00177 00179 void PropertyCacheLookupStarted() { 00180 SetToNow(&pcache_lookup_start_ts_ms_); 00181 } 00182 00184 void PropertyCacheLookupFinished() { SetToNow(&pcache_lookup_end_ts_ms_); } 00185 00188 void RequestFinished() { SetToNow(&end_ts_ms_); } 00189 00195 void FetchStarted(); 00196 void FetchHeaderReceived(); 00197 void FetchFinished(); 00198 00201 void SetHTTPCacheLatencyMs(int64 latency_ms); 00202 void SetL2HTTPCacheLatencyMs(int64 latency_ms); 00203 00205 int64 GetElapsedMs() const; 00206 00208 bool GetTimeToStartProcessingMs(int64* elapsed_ms) const { 00209 return GetTimeFromStart(processing_start_ts_ms_, elapsed_ms); 00210 } 00211 00216 bool GetProcessingElapsedMs(int64* elapsed_ms) const; 00217 00219 bool GetTimeToPropertyCacheLookupStartMs(int64* elapsed_ms) const { 00220 return GetTimeFromStart(pcache_lookup_start_ts_ms_, elapsed_ms); 00221 } 00222 00224 bool GetTimeToPropertyCacheLookupEndMs(int64* elapsed_ms) const { 00225 return GetTimeFromStart(pcache_lookup_end_ts_ms_, elapsed_ms); 00226 } 00227 00229 bool GetHTTPCacheLatencyMs(int64* latency_ms) const; 00230 bool GetL2HTTPCacheLatencyMs(int64* latency_ms) const; 00231 00233 bool GetTimeToStartFetchMs(int64* elapsed_ms) const; 00234 00236 bool GetFetchHeaderLatencyMs(int64* latency_ms) const; 00237 00239 bool GetFetchLatencyMs(int64* latency_ms) const; 00240 00243 bool GetTimeToFirstByte(int64* latency_ms) const; 00244 00246 bool GetTimeToStartParseMs(int64* elapsed_ms) const { 00247 return GetTimeFromStart(parsing_start_ts_ms_, elapsed_ms); 00248 } 00249 00250 int64 init_ts_ms() const { return init_ts_ms_; } 00251 00252 int64 start_ts_ms() const { return start_ts_ms_; } 00253 00254 private: 00255 int64 NowMs() const; 00256 00258 void SetToNow(int64* ts_ms) const; 00259 00262 bool GetTimeFromStart(int64 ts_ms, int64* elapsed_ms) const; 00263 00264 00265 Timer* timer_; 00266 00272 int64 init_ts_ms_; 00273 int64 start_ts_ms_; 00274 int64 processing_start_ts_ms_; 00275 int64 pcache_lookup_start_ts_ms_; 00276 int64 pcache_lookup_end_ts_ms_; 00277 int64 parsing_start_ts_ms_; 00278 int64 end_ts_ms_; 00279 00280 AbstractMutex* mu_; 00281 00282 int64 fetch_start_ts_ms_; 00283 int64 fetch_header_ts_ms_; 00284 int64 fetch_end_ts_ms_; 00285 int64 first_byte_ts_ms_; 00286 00288 int64 http_cache_latency_ms_; 00289 int64 l2http_cache_latency_ms_; 00290 00291 DISALLOW_COPY_AND_ASSIGN(TimingInfo); 00292 }; 00293 00294 const TimingInfo& timing_info() const { return timing_info_; } 00295 TimingInfo* mutable_timing_info() { return &timing_info_; } 00296 00297 protected: 00301 RequestContext(AbstractMutex* mutex, Timer* timer, 00302 AbstractLogRecord* log_record); 00304 virtual ~RequestContext(); 00305 REFCOUNT_FRIEND_DECLARATION(RequestContext); 00306 00307 private: 00309 scoped_ptr<AbstractLogRecord> log_record_; 00310 00311 TimingInfo timing_info_; 00312 00314 scoped_ptr<RequestTrace> root_trace_context_; 00315 00317 scoped_ptr<AbstractLogRecord> background_rewrite_log_record_; 00318 00319 bool using_spdy_; 00320 SplitRequestType split_request_type_;; 00321 00322 DISALLOW_COPY_AND_ASSIGN(RequestContext); 00323 }; 00324 00325 } 00326 00327 #endif ///< NET_INSTAWEB_HTTP_PUBLIC_REQUEST_CONTEXT_H_