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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef NET_HTTP_HTTP_PIPELINED_HOST_H_ |
| 6 #define NET_HTTP_HTTP_PIPELINED_HOST_H_ |
| 7 #pragma once |
| 8 |
| 9 #include <set> |
| 10 #include <string> |
| 11 |
| 12 #include "base/basictypes.h" |
| 13 #include "base/memory/scoped_ptr.h" |
| 14 #include "net/base/host_port_pair.h" |
| 15 #include "net/base/net_export.h" |
| 16 #include "net/http/http_pipelined_connection.h" |
| 17 |
| 18 namespace net { |
| 19 |
| 20 class BoundNetLog; |
| 21 class ClientSocketHandle; |
| 22 class HttpPipelinedStream; |
| 23 class ProxyInfo; |
| 24 struct SSLConfig; |
| 25 |
| 26 // Manages all of the pipelining state for specific host with active pipelined |
| 27 // HTTP requests. Manages connection jobs, constructs pipelined streams, and |
| 28 // assigns requests to the least loaded pipelined connection. |
| 29 class NET_EXPORT_PRIVATE HttpPipelinedHost |
| 30 : public HttpPipelinedConnection::Delegate { |
| 31 public: |
| 32 class Delegate { |
| 33 public: |
| 34 // Called when a pipelined host has no outstanding requests on any of its |
| 35 // pipelined connections. |
| 36 virtual void OnHostIdle(HttpPipelinedHost* host) = 0; |
| 37 |
| 38 // Called when a pipelined host has newly available pipeline capacity, like |
| 39 // when a request completes. |
| 40 virtual void OnHostHasAdditionalCapacity(HttpPipelinedHost* host) = 0; |
| 41 }; |
| 42 |
| 43 HttpPipelinedHost(Delegate* delegate, const HostPortPair& origin, |
| 44 HttpPipelinedConnection::Factory* factory); |
| 45 ~HttpPipelinedHost(); |
| 46 |
| 47 // Constructs a new pipeline on |connection| and returns a new |
| 48 // HttpPipelinedStream that uses it. |
| 49 HttpPipelinedStream* CreateStreamOnNewPipeline( |
| 50 ClientSocketHandle* connection, |
| 51 const SSLConfig& used_ssl_config, |
| 52 const ProxyInfo& used_proxy_info, |
| 53 const BoundNetLog& net_log, |
| 54 bool was_npn_negotiated); |
| 55 |
| 56 // Tries to find an existing pipeline with capacity for a new request. If |
| 57 // successful, returns a new stream on that pipeline. Otherwise, returns NULL. |
| 58 HttpPipelinedStream* CreateStreamOnExistingPipeline(); |
| 59 |
| 60 // Returns true if we have a pipelined connection that can accept new |
| 61 // requests. |
| 62 bool IsExistingPipelineAvailable(); |
| 63 |
| 64 // Callbacks for HttpPipelinedConnection. |
| 65 |
| 66 // Called when a pipelined connection completes a request. Adds a pending |
| 67 // request to the pipeline if the pipeline is still usable. |
| 68 virtual void OnPipelineHasCapacity( |
| 69 HttpPipelinedConnection* pipeline) OVERRIDE; |
| 70 |
| 71 const HostPortPair& origin() const { return origin_; } |
| 72 |
| 73 private: |
| 74 // Called when a pipeline is empty and there are no pending requests. Closes |
| 75 // the connection. |
| 76 void OnPipelineEmpty(HttpPipelinedConnection* pipeline); |
| 77 |
| 78 // Adds the next pending request to the pipeline if it's still usuable. |
| 79 void AddRequestToPipeline(HttpPipelinedConnection* connection); |
| 80 |
| 81 int max_pipeline_depth() const { return 3; } |
| 82 |
| 83 Delegate* delegate_; |
| 84 const HostPortPair origin_; |
| 85 std::set<HttpPipelinedConnection*> pipelines_; |
| 86 scoped_ptr<HttpPipelinedConnection::Factory> factory_; |
| 87 |
| 88 DISALLOW_COPY_AND_ASSIGN(HttpPipelinedHost); |
| 89 }; |
| 90 |
| 91 } // namespace net |
| 92 |
| 93 #endif // NET_HTTP_HTTP_PIPELINED_HOST_H_ |
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