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Side by Side Diff: chrome/browser/net/predictor_api.h

Issue 7467012: Modifying prefetch to account for multi-profile. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 9 years, 5 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // This is the global interface for the dns prefetch services. It centralizes 5 // This is the global interface for the dns prefetch services. It centralizes
6 // initialization, along with all the callbacks etc. to connect to the browser 6 // initialization, along with all the callbacks etc. to connect to the browser
7 // process. This allows the more standard DNS prefetching services, such as 7 // process. This allows the more standard DNS prefetching services, such as
8 // provided by Predictor to be left as more generally usable code, and possibly 8 // provided by Predictor to be left as more generally usable code, and possibly
9 // be shared across multiple client projects. 9 // be shared across multiple client projects.
10 10
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21 #include "chrome/browser/net/predictor.h" 21 #include "chrome/browser/net/predictor.h"
22 22
23 namespace base { 23 namespace base {
24 class FieldTrial; 24 class FieldTrial;
25 } 25 }
26 26
27 class PrefService; 27 class PrefService;
28 28
29 namespace chrome_browser_net { 29 namespace chrome_browser_net {
30 30
31 // Deletes |referral_list| when done.
32 void FinalizePredictorInitialization(
33 Predictor* global_predictor,
34 const std::vector<GURL>& urls_to_prefetch,
35 ListValue* referral_list);
36
37 // Free all resources allocated by FinalizePredictorInitialization. After that
38 // you must not call any function from this file.
39 void FreePredictorResources();
40
41 //------------------------------------------------------------------------------ 31 //------------------------------------------------------------------------------
42 // Global APIs relating to predictions in browser. 32 // Global APIs relating to predictions in browser.
43 void EnablePredictor(bool enable);
44 void DiscardInitialNavigationHistory();
45 void RegisterUserPrefs(PrefService* user_prefs); 33 void RegisterUserPrefs(PrefService* user_prefs);
46 34
47 // Renderer bundles up list and sends to this browser API via IPC.
48 // TODO(jar): Use UrlList instead to include port and scheme.
49 void DnsPrefetchList(const NameList& hostnames);
50
51 // This API is used by the autocomplete popup box (as user types).
52 // This will either preresolve the domain name, or possibly preconnect creating
53 // an open TCP/IP connection to the host.
54 void AnticipateOmniboxUrl(const GURL& url, bool preconnectable);
55
56 // This API should only be called when we're absolutely certain that we will
57 // be connecting to the URL. It will preconnect the url and it's associated
58 // subresource domains immediately.
59 void PreconnectUrlAndSubresources(const GURL& url);
60
61 // When displaying info in about:dns, the following API is called.
62 void PredictorGetHtmlInfo(std::string* output);
63
64 // Destroy the predictor's internal state: referrers and work queue.
65 void ClearPredictorCache();
66
67 //------------------------------------------------------------------------------
68 // When we navigate to a frame that may contain embedded resources, we may know
69 // in advance some other URLs that will need to be connected to (via TCP and
70 // sometimes SSL). This function initiates those connections
71 void PredictFrameSubresources(const GURL& url);
72
73 // During startup, we learn what the first N urls visited are, and then resolve
74 // the associated hosts ASAP during our next startup.
75 void LearnAboutInitialNavigation(const GURL& url);
76
77 // Call when we should learn from a navigation about a relationship to a
78 // subresource target, and its containing frame, which was loaded as a referring
79 // URL.
80 void LearnFromNavigation(const GURL& referring_url, const GURL& target_url);
81
82 //------------------------------------------------------------------------------
83 void SavePredictorStateForNextStartupAndTrim(PrefService* prefs);
84 // Helper class to handle global init and shutdown. 35 // Helper class to handle global init and shutdown.
85 class PredictorInit { 36 class PredictorInit {
86 public: 37 public:
87 // Too many concurrent lookups performed in parallel may overload a resolver, 38 // Too many concurrent lookups performed in parallel may overload a resolver,
88 // or may cause problems for a local router. The following limits that count. 39 // or may cause problems for a local router. The following limits that count.
89 static const size_t kMaxSpeculativeParallelResolves; 40 static const size_t kMaxSpeculativeParallelResolves;
90 41
91 // When prefetch requests are queued beyond some period of time, then the 42 // When prefetch requests are queued beyond some period of time, then the
92 // system is congested, and we need to clear all queued requests to get out 43 // system is congested, and we need to clear all queued requests to get out
93 // of that state. The following is the suggested default time limit. 44 // of that state. The following is the suggested default time limit.
94 static const int kMaxSpeculativeResolveQueueDelayMs; 45 static const int kMaxSpeculativeResolveQueueDelayMs;
95 46
96 PredictorInit(PrefService* user_prefs, PrefService* local_state, 47 PredictorInit(PrefService* user_prefs, PrefService* local_state,
97 bool preconnect_enabled); 48 Profile* profile, bool preconnect_enabled);
98 ~PredictorInit(); 49 ~PredictorInit();
99 50
100 private: 51 private:
101 // Maintain a field trial instance when we do A/B testing. 52 // Maintain a field trial instance when we do A/B testing.
102 scoped_refptr<base::FieldTrial> trial_; 53 scoped_refptr<base::FieldTrial> trial_;
103 54
104 DISALLOW_COPY_AND_ASSIGN(PredictorInit); 55 DISALLOW_COPY_AND_ASSIGN(PredictorInit);
105 }; 56 };
106 57
107 } // namespace chrome_browser_net 58 } // namespace chrome_browser_net
108 59
109 #endif // CHROME_BROWSER_NET_PREDICTOR_API_H_ 60 #endif // CHROME_BROWSER_NET_PREDICTOR_API_H_
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