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Viewing changes to debian/modules/ngx_pagespeed/psol/include/net/instaweb/http/public/simulated_delay_fetcher.h

  • Committer: Vivian
  • Date: 2015-12-04 18:20:11 UTC
  • Revision ID: git-v1:a36f2bc32e884f7473b3a47040e5411306144d7d
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debian/modules/ngx_pagespeed/psol/include/net/instaweb/http/public/simulated_delay_fetcher.h
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/*
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 * Copyright 2014 Google Inc.
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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// Author: morlovich@google.com (Maksim Orlovich)
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#ifndef NET_INSTAWEB_HTTP_PUBLIC_SIMULATED_DELAY_FETCHER_H_
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#define NET_INSTAWEB_HTTP_PUBLIC_SIMULATED_DELAY_FETCHER_H_
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#include <map>
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#include "net/instaweb/http/public/url_async_fetcher.h"
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#include "net/instaweb/util/public/basictypes.h"
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#include "net/instaweb/util/public/string.h"
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#include "net/instaweb/util/public/string_util.h"
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#include "pagespeed/kernel/base/file_system.h"
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#include "pagespeed/kernel/base/scoped_ptr.h"
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#include "pagespeed/kernel/base/thread_annotations.h"
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namespace net_instaweb {
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class AbstractMutex;
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class AsyncFetch;
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class MessageHandler;
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class Scheduler;
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class ThreadSystem;
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class Timer;
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// SimulatedDelayFetcher lets one configure various per-host delays, and will
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// make hardcoded replies according to those replies. This exists to help run
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// simulations of server behavior with sites of widely various speeds.
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class SimulatedDelayFetcher : public UrlAsyncFetcher {
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 public:
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  // The payload that this will deliver.
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  static const char kPayload[];
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  // delay_map_path is the path to the file describing the delays for each host
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  // The format is: foo.com=4;bar.com=42;baz.com=43; (line breaks are permitted)
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  // The delays are in milliseconds.
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  //
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  // request_log_path will be used to log when each request was received.
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  // (Not when it was served).
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  SimulatedDelayFetcher(ThreadSystem* thread_system,
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                        Timer* timer,
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                        Scheduler* scheduler,
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                        MessageHandler* handler,
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                        FileSystem* file_system,
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                        StringPiece delay_map_path,
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                        StringPiece request_log_path,
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                        int request_log_flush_frequency);
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  virtual ~SimulatedDelayFetcher();
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  virtual void Fetch(const GoogleString& url,
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                     MessageHandler* message_handler,
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                     AsyncFetch* fetch);
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 private:
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  typedef std::map<GoogleString, int> DelayMap;
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  void ProduceReply(AsyncFetch* fetch);
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  void ParseDelayMap(StringPiece delay_map_path);
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  Timer* timer_;
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  Scheduler* scheduler_;
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  MessageHandler* message_handler_;
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  FileSystem* file_system_;
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  DelayMap delays_ms_;
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  int request_log_flush_frequency_;
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  scoped_ptr<AbstractMutex> mutex_;
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  int request_log_outstanding_ GUARDED_BY(mutex_.get());
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  FileSystem::OutputFile* request_log_ PT_GUARDED_BY(mutex_.get());
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  DISALLOW_COPY_AND_ASSIGN(SimulatedDelayFetcher);
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};
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}  // namespace net_instaweb
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#endif  // NET_INSTAWEB_HTTP_PUBLIC_SIMULATED_DELAY_FETCHER_H_