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      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
      3 // found in the LICENSE file.
      4 
      5 #ifndef COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_MANAGER_H_
      6 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_MANAGER_H_
      7 
      8 #include <string>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/compiler_specific.h"
     12 #include "base/memory/ref_counted.h"
     13 #include "base/memory/scoped_ptr.h"
     14 #include "base/prefs/pref_member.h"
     15 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
     16 #include "components/policy/core/common/cloud/cloud_policy_core.h"
     17 #include "components/policy/core/common/cloud/cloud_policy_store.h"
     18 #include "components/policy/core/common/cloud/component_cloud_policy_service.h"
     19 #include "components/policy/core/common/configuration_policy_provider.h"
     20 #include "components/policy/policy_export.h"
     21 
     22 namespace base {
     23 class FilePath;
     24 class SequencedTaskRunner;
     25 }
     26 
     27 namespace net {
     28 class URLRequestContextGetter;
     29 }
     30 
     31 namespace policy {
     32 
     33 class PolicyMap;
     34 
     35 // CloudPolicyManager is the main switching central between cloud policy and the
     36 // upper layers of the policy stack. It wires up a CloudPolicyCore to the
     37 // ConfigurationPolicyProvider interface.
     38 //
     39 // This class contains the base functionality, there are subclasses that add
     40 // functionality specific to user-level and device-level cloud policy, such as
     41 // blocking on initial user policy fetch or device enrollment.
     42 class POLICY_EXPORT CloudPolicyManager
     43     : public ConfigurationPolicyProvider,
     44       public CloudPolicyStore::Observer,
     45       public ComponentCloudPolicyService::Delegate {
     46  public:
     47   // |task_runner| is the runner for policy refresh tasks.
     48   // |file_task_runner| is used for file operations. Currently this must be the
     49   // FILE BrowserThread.
     50   // |io_task_runner| is used for network IO. Currently this must be the IO
     51   // BrowserThread.
     52   CloudPolicyManager(
     53       const PolicyNamespaceKey& policy_ns_key,
     54       CloudPolicyStore* cloud_policy_store,
     55       const scoped_refptr<base::SequencedTaskRunner>& task_runner,
     56       const scoped_refptr<base::SequencedTaskRunner>& file_task_runner,
     57       const scoped_refptr<base::SequencedTaskRunner>& io_task_runner);
     58   virtual ~CloudPolicyManager();
     59 
     60   CloudPolicyCore* core() { return &core_; }
     61   const CloudPolicyCore* core() const { return &core_; }
     62 
     63   // ConfigurationPolicyProvider:
     64   virtual void Shutdown() OVERRIDE;
     65   virtual bool IsInitializationComplete(PolicyDomain domain) const OVERRIDE;
     66   virtual void RefreshPolicies() OVERRIDE;
     67 
     68   // CloudPolicyStore::Observer:
     69   virtual void OnStoreLoaded(CloudPolicyStore* cloud_policy_store) OVERRIDE;
     70   virtual void OnStoreError(CloudPolicyStore* cloud_policy_store) OVERRIDE;
     71 
     72   // ComponentCloudPolicyService::Delegate:
     73   virtual void OnComponentCloudPolicyUpdated() OVERRIDE;
     74 
     75  protected:
     76   // Check whether fully initialized and if so, publish policy by calling
     77   // ConfigurationPolicyStore::UpdatePolicy().
     78   void CheckAndPublishPolicy();
     79 
     80   // Writes Chrome policy into |policy_map|. This is intended to be overridden
     81   // by subclasses that want to post-process policy before publishing it. The
     82   // default implementation just copies over |store()->policy_map()|.
     83   virtual void GetChromePolicy(PolicyMap* policy_map);
     84 
     85   void CreateComponentCloudPolicyService(
     86       const base::FilePath& policy_cache_path,
     87       const scoped_refptr<net::URLRequestContextGetter>& request_context);
     88 
     89   void ClearAndDestroyComponentCloudPolicyService();
     90 
     91   // Convenience accessors to core() components.
     92   CloudPolicyClient* client() { return core_.client(); }
     93   const CloudPolicyClient* client() const { return core_.client(); }
     94   CloudPolicyStore* store() { return core_.store(); }
     95   const CloudPolicyStore* store() const { return core_.store(); }
     96   CloudPolicyService* service() { return core_.service(); }
     97   const CloudPolicyService* service() const { return core_.service(); }
     98   ComponentCloudPolicyService* component_policy_service() const {
     99     return component_policy_service_.get();
    100   }
    101 
    102  private:
    103   // Completion handler for policy refresh operations.
    104   void OnRefreshComplete(bool success);
    105 
    106   CloudPolicyCore core_;
    107   scoped_ptr<ComponentCloudPolicyService> component_policy_service_;
    108 
    109   // Whether there's a policy refresh operation pending, in which case all
    110   // policy update notifications are deferred until after it completes.
    111   bool waiting_for_policy_refresh_;
    112 
    113   scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
    114   scoped_refptr<base::SequencedTaskRunner> io_task_runner_;
    115 
    116   DISALLOW_COPY_AND_ASSIGN(CloudPolicyManager);
    117 };
    118 
    119 }  // namespace policy
    120 
    121 #endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_MANAGER_H_
    122