rate_controlling_url_async_fetcher.h

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/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http:///www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef NET_INSTAWEB_HTTP_PUBLIC_RATE_CONTROLLING_URL_ASYNC_FETCHER_H_
#define NET_INSTAWEB_HTTP_PUBLIC_RATE_CONTROLLING_URL_ASYNC_FETCHER_H_

#include "net/instaweb/http/public/url_async_fetcher.h"
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/scoped_ptr.h"
#include "pagespeed/kernel/base/string.h"

namespace net_instaweb {

class AsyncFetch;
class MessageHandler;
class RateController;
class Statistics;
class ThreadSystem;

class RateControllingUrlAsyncFetcher : public UrlAsyncFetcher {
 public:
  RateControllingUrlAsyncFetcher(UrlAsyncFetcher* fetcher,
                                 int max_global_queue_size,
                                 int per_host_outgoing_request_threshold,
                                 int per_host_queued_request_threshold,
                                 ThreadSystem* thread_system,
                                 Statistics* statistics);

  virtual ~RateControllingUrlAsyncFetcher();

  virtual bool SupportsHttps() const {
    return base_fetcher_->SupportsHttps();
  }

  virtual void Fetch(const GoogleString& url,
                     MessageHandler* message_handler,
                     AsyncFetch* fetch);

  virtual void ShutDown();

 private:
  UrlAsyncFetcher* base_fetcher_;
  scoped_ptr<RateController> rate_controller_;

  
};

}  

#endif