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62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_PROXY_RESOLUTION_POLLING_PROXY_CONFIG_SERVICE_H_
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#define NET_PROXY_RESOLUTION_POLLING_PROXY_CONFIG_SERVICE_H_
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#include "base/compiler_specific.h"
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#include "base/macros.h"
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#include "base/memory/ref_counted.h"
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#include "base/time/time.h"
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#include "net/base/net_export.h"
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#include "net/proxy_resolution/proxy_config_service.h"
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#include "net/traffic_annotation/network_traffic_annotation.h"
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namespace net {
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// PollingProxyConfigService is a base class for creating ProxyConfigService
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// implementations that use polling to notice when settings have change.
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//
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// It runs code to get the current proxy settings on a background worker
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// thread, and notifies registered observers when the value changes.
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class NET_EXPORT_PRIVATE PollingProxyConfigService : public ProxyConfigService {
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public:
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// ProxyConfigService implementation:
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void AddObserver(Observer* observer) override;
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void RemoveObserver(Observer* observer) override;
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ConfigAvailability GetLatestProxyConfig(
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ProxyConfigWithAnnotation* config) override;
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void OnLazyPoll() override;
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protected:
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// Function for retrieving the current proxy configuration.
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// Implementors must be threadsafe as the function will be invoked from
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// worker threads.
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typedef void (*GetConfigFunction)(NetworkTrafficAnnotationTag,
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ProxyConfigWithAnnotation*);
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// Creates a polling-based ProxyConfigService which will test for new
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// settings at most every |poll_interval| time by calling |get_config_func|
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// on a worker thread.
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PollingProxyConfigService(
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base::TimeDelta poll_interval,
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GetConfigFunction get_config_func,
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const NetworkTrafficAnnotationTag& traffic_annotation);
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~PollingProxyConfigService() override;
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// Polls for changes by posting a task to the worker pool.
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void CheckForChangesNow();
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private:
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class Core;
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scoped_refptr<Core> core_;
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DISALLOW_COPY_AND_ASSIGN(PollingProxyConfigService);
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};
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} // namespace net
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#endif // NET_PROXY_RESOLUTION_POLLING_PROXY_CONFIG_SERVICE_H_
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