blob: 1c65e3a658035278f973eee706128dd07c592699 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
// Copyright (c) 2010 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_PROXY_PROXY_CONFIG_SERVICE_H_
#define NET_PROXY_PROXY_CONFIG_SERVICE_H_
namespace net {
class ProxyConfig;
// Service for watching when the proxy settings have changed.
class ProxyConfigService {
public:
// Observer for being notified when the proxy settings have changed.
class Observer {
public:
virtual ~Observer() {}
virtual void OnProxyConfigChanged(const ProxyConfig& config) = 0;
};
virtual ~ProxyConfigService() {}
// Adds/Removes an observer that will be called whenever the proxy
// configuration has changed.
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// Gets the most recent value of the proxy configuration. Returns false if
// it is not available yet. In the case where we returned false, it is
// guaranteed that subscribed observers will be notified of a change at
// some point in the future once the configuration is available.
// Note that to avoid re-entrancy problems, implementations should not
// dispatch any change notifications from within this function.
virtual bool GetLatestProxyConfig(ProxyConfig* config) = 0;
// ProxyService will call this periodically during periods of activity.
// It can be used as a signal for polling-based implementations.
//
// Note that this is purely used as an optimization -- polling
// implementations could simply set a global timer that goes off every
// X seconds at which point they check for changes. However that has
// the disadvantage of doing continuous work even during idle periods.
virtual void OnLazyPoll() {}
};
} // namespace net
#endif // NET_PROXY_PROXY_CONFIG_SERVICE_H_
|
