| // Copyright (c) 2012 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 CHROME_BROWSER_POLICY_ASYNC_POLICY_PROVIDER_H_ |
| #define CHROME_BROWSER_POLICY_ASYNC_POLICY_PROVIDER_H_ |
| |
| #include "base/cancelable_callback.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/threading/non_thread_safe.h" |
| #include "chrome/browser/policy/configuration_policy_provider.h" |
| |
| namespace base { |
| class MessageLoopProxy; |
| } |
| |
| namespace policy { |
| |
| class AsyncPolicyLoader; |
| class PolicyBundle; |
| |
| // A policy provider that loads its policies asynchronously on the FILE thread. |
| // Platform-specific providers are created by passing an implementation of |
| // AsyncPolicyLoader to a new AsyncPolicyProvider. |
| class AsyncPolicyProvider : public ConfigurationPolicyProvider, |
| public base::NonThreadSafe { |
| public: |
| explicit AsyncPolicyProvider(scoped_ptr<AsyncPolicyLoader> loader); |
| virtual ~AsyncPolicyProvider(); |
| |
| // ConfigurationPolicyProvider implementation. |
| virtual void Init() OVERRIDE; |
| virtual void Shutdown() OVERRIDE; |
| virtual void RefreshPolicies() OVERRIDE; |
| virtual void RegisterPolicyDomain( |
| scoped_refptr<const PolicyDomainDescriptor> descriptor) OVERRIDE; |
| |
| private: |
| // Helper for RefreshPolicies(). |
| void ReloadAfterRefreshSync(); |
| |
| // Invoked with the latest bundle loaded by the |loader_|. |
| void OnLoaderReloaded(scoped_ptr<PolicyBundle> bundle); |
| |
| // Callback passed to the loader that it uses to pass back the current policy |
| // bundle to the provider. This is invoked on the FILE thread and forwards |
| // to OnLoaderReloaded() on the loop that owns the provider, if |weak_this| is |
| // still valid. |
| static void LoaderUpdateCallback(scoped_refptr<base::MessageLoopProxy> loop, |
| base::WeakPtr<AsyncPolicyProvider> weak_this, |
| scoped_ptr<PolicyBundle> bundle); |
| |
| // The |loader_| that does the platform-specific policy loading. It lives |
| // on the FILE thread but is owned by |this|. |
| AsyncPolicyLoader* loader_; |
| |
| // Used to get a WeakPtr to |this| for the update callback given to the |
| // loader. |
| base::WeakPtrFactory<AsyncPolicyProvider> weak_factory_; |
| |
| // Callback used to synchronize RefreshPolicies() calls with the FILE thread. |
| // See the implementation for the details. |
| base::CancelableClosure refresh_callback_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AsyncPolicyProvider); |
| }; |
| |
| } // namespace policy |
| |
| #endif // CHROME_BROWSER_POLICY_ASYNC_POLICY_PROVIDER_H_ |