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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_HTTP_HTTP_PIPELINED_HOST_POOL_H_
#define NET_HTTP_HTTP_PIPELINED_HOST_POOL_H_
#pragma once
#include <map>
#include "base/basictypes.h"
#include "net/http/http_pipelined_host.h"
namespace net {
class HostPortPair;
class HttpPipelinedStream;
class HttpStreamFactoryImpl;
// Manages all of the pipelining state for specific host with active pipelined
// HTTP requests. Manages connection jobs, constructs pipelined streams, and
// assigns requests to the least loaded pipelined connection.
class HttpPipelinedHostPool : public HttpPipelinedHost::Delegate {
public:
explicit HttpPipelinedHostPool(HttpStreamFactoryImpl* factory);
~HttpPipelinedHostPool();
// Constructs a new pipeline on |connection| and returns a new
// HttpPipelinedStream that uses it.
HttpPipelinedStream* CreateStreamOnNewPipeline(
const HostPortPair& origin,
ClientSocketHandle* connection,
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
const BoundNetLog& net_log,
bool was_npn_negotiated);
// Tries to find an existing pipeline with capacity for a new request. If
// successful, returns a new stream on that pipeline. Otherwise, returns NULL.
HttpPipelinedStream* CreateStreamOnExistingPipeline(
const HostPortPair& origin);
// Returns true if a pipelined connection already exists for this origin and
// can accept new requests.
bool IsExistingPipelineAvailableForOrigin(const HostPortPair& origin);
// Callbacks for HttpPipelinedHost.
virtual void OnHostIdle(HttpPipelinedHost* host) OVERRIDE;
virtual void OnHostHasAdditionalCapacity(HttpPipelinedHost* host) OVERRIDE;
private:
typedef std::map<const HostPortPair, HttpPipelinedHost*> HostMap;
HttpPipelinedHost* GetPipelinedHost(const HostPortPair& origin,
bool create_if_not_found);
HttpStreamFactoryImpl* factory_;
HostMap host_map_;
DISALLOW_COPY_AND_ASSIGN(HttpPipelinedHostPool);
};
} // namespace net
#endif // NET_HTTP_HTTP_PIPELINED_HOST_POOL_H_
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