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Side by Side Diff: net/url_request/url_request_throttler_manager.h

Issue 11620007: Switch from OnIPAddressChanged and OnConnectionTypeChange to OnNetworkChanged Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 7 years, 11 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 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 #ifndef NET_URL_REQUEST_URL_REQUEST_THROTTLER_MANAGER_H_ 5 #ifndef NET_URL_REQUEST_URL_REQUEST_THROTTLER_MANAGER_H_
6 #define NET_URL_REQUEST_URL_REQUEST_THROTTLER_MANAGER_H_ 6 #define NET_URL_REQUEST_URL_REQUEST_THROTTLER_MANAGER_H_
7 7
8 #include <map> 8 #include <map>
9 #include <set> 9 #include <set>
10 #include <string> 10 #include <string>
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27 // in order to supervise traffic. URL requests for HTTP contents should 27 // in order to supervise traffic. URL requests for HTTP contents should
28 // register their URLs in this manager on each request. 28 // register their URLs in this manager on each request.
29 // 29 //
30 // URLRequestThrottlerManager maintains a map of URL IDs to URL request 30 // URLRequestThrottlerManager maintains a map of URL IDs to URL request
31 // throttler entries. It creates URL request throttler entries when new URLs 31 // throttler entries. It creates URL request throttler entries when new URLs
32 // are registered, and does garbage collection from time to time in order to 32 // are registered, and does garbage collection from time to time in order to
33 // clean out outdated entries. URL ID consists of lowercased scheme, host, port 33 // clean out outdated entries. URL ID consists of lowercased scheme, host, port
34 // and path. All URLs converted to the same ID will share the same entry. 34 // and path. All URLs converted to the same ID will share the same entry.
35 class NET_EXPORT URLRequestThrottlerManager 35 class NET_EXPORT URLRequestThrottlerManager
36 : NON_EXPORTED_BASE(public base::NonThreadSafe), 36 : NON_EXPORTED_BASE(public base::NonThreadSafe),
37 public NetworkChangeNotifier::IPAddressObserver, 37 public NetworkChangeNotifier::NetworkChangeObserver {
38 public NetworkChangeNotifier::ConnectionTypeObserver {
39 public: 38 public:
40 URLRequestThrottlerManager(); 39 URLRequestThrottlerManager();
41 virtual ~URLRequestThrottlerManager(); 40 virtual ~URLRequestThrottlerManager();
42 41
43 // Must be called for every request, returns the URL request throttler entry 42 // Must be called for every request, returns the URL request throttler entry
44 // associated with the URL. The caller must inform this entry of some events. 43 // associated with the URL. The caller must inform this entry of some events.
45 // Please refer to url_request_throttler_entry_interface.h for further 44 // Please refer to url_request_throttler_entry_interface.h for further
46 // informations. 45 // informations.
47 scoped_refptr<URLRequestThrottlerEntryInterface> RegisterRequestUrl( 46 scoped_refptr<URLRequestThrottlerEntryInterface> RegisterRequestUrl(
48 const GURL& url); 47 const GURL& url);
(...skipping 21 matching lines...) Expand all
70 bool enable_thread_checks() const; 69 bool enable_thread_checks() const;
71 70
72 // Whether throttling is enabled or not. 71 // Whether throttling is enabled or not.
73 void set_enforce_throttling(bool enforce); 72 void set_enforce_throttling(bool enforce);
74 bool enforce_throttling(); 73 bool enforce_throttling();
75 74
76 // Sets the NetLog instance to use. 75 // Sets the NetLog instance to use.
77 void set_net_log(NetLog* net_log); 76 void set_net_log(NetLog* net_log);
78 NetLog* net_log() const; 77 NetLog* net_log() const;
79 78
80 // IPAddressObserver interface. 79 // NetworkChangeNotifier::NetworkChangeObserver interface.
81 virtual void OnIPAddressChanged() OVERRIDE; 80 // When we switch from online to offline or change IP addresses, we
82 81 // clear all back-off history. This is a precaution in case the change in
83 // ConnectionTypeObserver interface. 82 // online state now lets us communicate without error with servers that
84 virtual void OnConnectionTypeChanged( 83 // we were previously getting 500 or 503 responses from (perhaps the
84 // responses are from a badly-written proxy that should have returned a
85 // 502 or 504 because it's upstream connection was down or it had no route
86 // to the server).
87 virtual void OnNetworkChanged(
szym 2013/01/20 06:52:08 You should keep the orders of declarations and def
85 NetworkChangeNotifier::ConnectionType type) OVERRIDE; 88 NetworkChangeNotifier::ConnectionType type) OVERRIDE;
86 89
87 // Method that allows us to transform a URL into an ID that can be used in our 90 // Method that allows us to transform a URL into an ID that can be used in our
88 // map. Resulting IDs will be lowercase and consist of the scheme, host, port 91 // map. Resulting IDs will be lowercase and consist of the scheme, host, port
89 // and path (without query string, fragment, etc.). 92 // and path (without query string, fragment, etc.).
90 // If the URL is invalid, the invalid spec will be returned, without any 93 // If the URL is invalid, the invalid spec will be returned, without any
91 // transformation. 94 // transformation.
92 std::string GetIdFromUrl(const GURL& url) const; 95 std::string GetIdFromUrl(const GURL& url) const;
93 96
94 // Method that ensures the map gets cleaned from time to time. The period at 97 // Method that ensures the map gets cleaned from time to time. The period at
95 // which garbage collecting happens is adjustable with the 98 // which garbage collecting happens is adjustable with the
96 // kRequestBetweenCollecting constant. 99 // kRequestBetweenCollecting constant.
97 void GarbageCollectEntriesIfNecessary(); 100 void GarbageCollectEntriesIfNecessary();
98 101
99 // Method that does the actual work of garbage collecting. 102 // Method that does the actual work of garbage collecting.
100 void GarbageCollectEntries(); 103 void GarbageCollectEntries();
101 104
102 // When we switch from online to offline or change IP addresses, we
103 // clear all back-off history. This is a precaution in case the change in
104 // online state now lets us communicate without error with servers that
105 // we were previously getting 500 or 503 responses from (perhaps the
106 // responses are from a badly-written proxy that should have returned a
107 // 502 or 504 because it's upstream connection was down or it had no route
108 // to the server).
109 void OnNetworkChange();
110
111 // Used by tests. 105 // Used by tests.
112 int GetNumberOfEntriesForTests() const { return url_entries_.size(); } 106 int GetNumberOfEntriesForTests() const { return url_entries_.size(); }
113 107
114 private: 108 private:
115 // From each URL we generate an ID composed of the scheme, host, port and path 109 // From each URL we generate an ID composed of the scheme, host, port and path
116 // that allows us to uniquely map an entry to it. 110 // that allows us to uniquely map an entry to it.
117 typedef std::map<std::string, scoped_refptr<URLRequestThrottlerEntry> > 111 typedef std::map<std::string, scoped_refptr<URLRequestThrottlerEntry> >
118 UrlEntryMap; 112 UrlEntryMap;
119 113
120 // We maintain a set of hosts that have opted out of exponential 114 // We maintain a set of hosts that have opted out of exponential
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157 151
158 // Valid once we've registered for network notifications. 152 // Valid once we've registered for network notifications.
159 base::PlatformThreadId registered_from_thread_; 153 base::PlatformThreadId registered_from_thread_;
160 154
161 DISALLOW_COPY_AND_ASSIGN(URLRequestThrottlerManager); 155 DISALLOW_COPY_AND_ASSIGN(URLRequestThrottlerManager);
162 }; 156 };
163 157
164 } // namespace net 158 } // namespace net
165 159
166 #endif // NET_URL_REQUEST_URL_REQUEST_THROTTLER_MANAGER_H_ 160 #endif // NET_URL_REQUEST_URL_REQUEST_THROTTLER_MANAGER_H_
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