Page Speed Optimization Libraries  1.8.31.2
net/instaweb/http/public/url_async_fetcher_stats.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 
00019 
00020 #ifndef NET_INSTAWEB_HTTP_PUBLIC_URL_ASYNC_FETCHER_STATS_H_
00021 #define NET_INSTAWEB_HTTP_PUBLIC_URL_ASYNC_FETCHER_STATS_H_
00022 
00023 #include "net/instaweb/http/public/url_async_fetcher.h"
00024 #include "net/instaweb/util/public/basictypes.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 Histogram;
00032 class MessageHandler;
00033 class Statistics;
00034 class Timer;
00035 class Variable;
00036 
00037 class UrlAsyncFetcherStats : public UrlAsyncFetcher {
00038  public:
00049   UrlAsyncFetcherStats(StringPiece prefix,
00050                        UrlAsyncFetcher* base_fetcher,
00051                        Timer* timer,
00052                        Statistics* statistics);
00053   virtual ~UrlAsyncFetcherStats();
00054 
00057   static void InitStats(StringPiece prefix, Statistics* statistics);
00058 
00061   virtual bool SupportsHttps() const;
00062   virtual void Fetch(const GoogleString& url,
00063                      MessageHandler* message_handler,
00064                      AsyncFetch* fetch);
00065   virtual int64 timeout_ms();
00066   virtual void ShutDown();
00067 
00068  private:
00069   class StatsAsyncFetch;
00070 
00071   UrlAsyncFetcher* base_fetcher_;
00072   Timer* timer_;
00073 
00074   Histogram* fetch_latency_us_histogram_;
00075   Variable* fetches_;
00076   Variable* bytes_fetched_;
00077   Variable* approx_header_bytes_fetched_;
00078 
00079   DISALLOW_COPY_AND_ASSIGN(UrlAsyncFetcherStats);
00080 };
00081 
00082 }  
00083 
00084 #endif  ///< NET_INSTAWEB_HTTP_PUBLIC_URL_ASYNC_FETCHER_STATS_H_
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