1 // Copyright (c) 2012 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_POOL_H_ 6 #define NET_HTTP_HTTP_PIPELINED_HOST_POOL_H_ 7 8 #include <map> 9 10 #include "base/basictypes.h" 11 #include "base/gtest_prod_util.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "base/memory/weak_ptr.h" 14 #include "net/http/http_pipelined_host.h" 15 #include "net/http/http_pipelined_host_capability.h" 16 17 namespace base { 18 class Value; 19 } 20 21 namespace net { 22 23 class HostPortPair; 24 class HttpPipelinedStream; 25 class HttpServerProperties; 26 27 // Manages all of the pipelining state for specific host with active pipelined 28 // HTTP requests. Manages connection jobs, constructs pipelined streams, and 29 // assigns requests to the least loaded pipelined connection. 30 class NET_EXPORT_PRIVATE HttpPipelinedHostPool 31 : public HttpPipelinedHost::Delegate { 32 public: 33 class Delegate { 34 public: 35 // Called when a HttpPipelinedHost has new capacity. Attempts to allocate 36 // any pending pipeline-capable requests to pipelines. 37 virtual void OnHttpPipelinedHostHasAdditionalCapacity( 38 HttpPipelinedHost* host) = 0; 39 }; 40 41 HttpPipelinedHostPool( 42 Delegate* delegate, 43 HttpPipelinedHost::Factory* factory, 44 const base::WeakPtr<HttpServerProperties>& http_server_properties, 45 bool force_pipelining); 46 virtual ~HttpPipelinedHostPool(); 47 48 // Returns true if pipelining might work for |key|. Generally, this returns 49 // true, unless |key| is known to have failed pipelining recently. 50 bool IsKeyEligibleForPipelining(const HttpPipelinedHost::Key& key); 51 52 // Constructs a new pipeline on |connection| and returns a new 53 // HttpPipelinedStream that uses it. 54 HttpPipelinedStream* CreateStreamOnNewPipeline( 55 const HttpPipelinedHost::Key& key, 56 ClientSocketHandle* connection, 57 const SSLConfig& used_ssl_config, 58 const ProxyInfo& used_proxy_info, 59 const BoundNetLog& net_log, 60 bool was_npn_negotiated, 61 NextProto protocol_negotiated); 62 63 // Tries to find an existing pipeline with capacity for a new request. If 64 // successful, returns a new stream on that pipeline. Otherwise, returns NULL. 65 HttpPipelinedStream* CreateStreamOnExistingPipeline( 66 const HttpPipelinedHost::Key& key); 67 68 // Returns true if a pipelined connection already exists for |key| and 69 // can accept new requests. 70 bool IsExistingPipelineAvailableForKey(const HttpPipelinedHost::Key& key); 71 72 // Callbacks for HttpPipelinedHost. 73 virtual void OnHostIdle(HttpPipelinedHost* host) OVERRIDE; 74 75 virtual void OnHostHasAdditionalCapacity(HttpPipelinedHost* host) OVERRIDE; 76 77 virtual void OnHostDeterminedCapability( 78 HttpPipelinedHost* host, 79 HttpPipelinedHostCapability capability) OVERRIDE; 80 81 // Creates a Value summary of this pool's |host_map_|. Caller assumes 82 // ownership of the returned Value. 83 base::Value* PipelineInfoToValue() const; 84 85 private: 86 typedef std::map<HttpPipelinedHost::Key, HttpPipelinedHost*> HostMap; 87 88 HttpPipelinedHost* GetPipelinedHost(const HttpPipelinedHost::Key& key, 89 bool create_if_not_found); 90 91 Delegate* delegate_; 92 scoped_ptr<HttpPipelinedHost::Factory> factory_; 93 HostMap host_map_; 94 const base::WeakPtr<HttpServerProperties> http_server_properties_; 95 bool force_pipelining_; 96 97 DISALLOW_COPY_AND_ASSIGN(HttpPipelinedHostPool); 98 }; 99 100 } // namespace net 101 102 #endif // NET_HTTP_HTTP_PIPELINED_HOST_POOL_H_ 103
