1 // Copyright (c) 2013 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.
5 #ifndef COMPONENTS_POLICY_CORE_COMMON_CLOUD_COMPONENT_CLOUD_POLICY_SERVICE_H_
6 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_COMPONENT_CLOUD_POLICY_SERVICE_H_
8 #include "base/basictypes.h"
9 #include "base/compiler_specific.h"
10 #include "base/memory/ref_counted.h"
11 #include "base/memory/scoped_ptr.h"
12 #include "base/memory/weak_ptr.h"
13 #include "base/threading/non_thread_safe.h"
14 #include "components/policy/core/common/cloud/cloud_policy_client.h"
15 #include "components/policy/core/common/cloud/cloud_policy_core.h"
16 #include "components/policy/core/common/cloud/cloud_policy_store.h"
17 #include "components/policy/core/common/policy_bundle.h"
18 #include "components/policy/core/common/policy_namespace.h"
19 #include "components/policy/core/common/schema_registry.h"
20 #include "components/policy/policy_export.h"
23 class SequencedTaskRunner;
27 class URLRequestContextGetter;
32 class ExternalPolicyDataFetcherBackend;
36 // Manages cloud policy for components.
38 // This class takes care of fetching, validating, storing and updating policy
39 // for components. The components to manage come from a SchemaRegistry.
40 class POLICY_EXPORT ComponentCloudPolicyService
41 : public CloudPolicyClient::Observer,
42 public CloudPolicyCore::Observer,
43 public CloudPolicyStore::Observer,
44 public SchemaRegistry::Observer,
45 public base::NonThreadSafe {
47 class POLICY_EXPORT Delegate {
51 // Invoked whenever the policy served by policy() changes. This is also
52 // invoked for the first time once the backend is initialized, and
53 // is_initialized() becomes true.
54 virtual void OnComponentCloudPolicyUpdated() = 0;
57 // The |delegate| is notified of updates to the downloaded policies and must
58 // outlive this object.
60 // |schema_registry| is used to get the list of components to fetch cloud
61 // policy for. It must outlive this object.
63 // |core| is used to obtain the CloudPolicyStore and CloudPolicyClient used
64 // by this service. The store will be the source of the registration status
65 // and registration credentials; the client will be used to fetch cloud
66 // policy. It must outlive this object.
68 // |cache| is used to load and store local copies of the downloaded policies.
70 // Download scheduling, validation and caching of policies are done via the
71 // |backend_task_runner|, which must support file I/O. Network I/O is done via
72 // the |io_task_runner|.
74 // |request_context| is used by the background URLFetchers.
75 ComponentCloudPolicyService(
77 SchemaRegistry* schema_registry,
78 CloudPolicyCore* core,
79 #if !defined(OS_ANDROID) && !defined(OS_IOS)
80 scoped_ptr<ResourceCache> cache,
82 scoped_refptr<net::URLRequestContextGetter> request_context,
83 scoped_refptr<base::SequencedTaskRunner> backend_task_runner,
84 scoped_refptr<base::SequencedTaskRunner> io_task_runner);
85 ~ComponentCloudPolicyService() override;
87 // Returns true if |domain| is supported by the service.
88 static bool SupportsDomain(PolicyDomain domain);
90 // Returns true if the backend is initialized, and the initial policies and
91 // components are being served.
92 bool is_initialized() const { return loaded_initial_policy_; }
94 // Returns the current policies for components.
95 const PolicyBundle& policy() const { return policy_; }
97 // Deletes all the cached component policy.
100 // SchemaRegistry::Observer implementation:
101 void OnSchemaRegistryReady() override;
102 void OnSchemaRegistryUpdated(bool has_new_schemas) override;
104 // CloudPolicyCore::Observer implementation:
105 void OnCoreConnected(CloudPolicyCore* core) override;
106 void OnCoreDisconnecting(CloudPolicyCore* core) override;
107 void OnRefreshSchedulerStarted(CloudPolicyCore* core) override;
109 // CloudPolicyStore::Observer implementation:
110 void OnStoreLoaded(CloudPolicyStore* store) override;
111 void OnStoreError(CloudPolicyStore* store) override;
113 // CloudPolicyClient::Observer implementation:
114 void OnPolicyFetched(CloudPolicyClient* client) override;
115 void OnRegistrationStateChanged(CloudPolicyClient* client) override;
116 void OnClientError(CloudPolicyClient* client) override;
119 #if !defined(OS_ANDROID) && !defined(OS_IOS)
122 void InitializeIfReady();
123 void OnBackendInitialized(scoped_ptr<PolicyBundle> initial_policy);
125 void OnPolicyUpdated(scoped_ptr<PolicyBundle> policy);
128 SchemaRegistry* schema_registry_;
129 CloudPolicyCore* core_;
130 scoped_refptr<net::URLRequestContextGetter> request_context_;
131 scoped_refptr<base::SequencedTaskRunner> backend_task_runner_;
132 scoped_refptr<base::SequencedTaskRunner> io_task_runner_;
134 // The |external_policy_data_fetcher_backend_| handles network I/O for the
135 // |backend_| because URLRequestContextGetter and URLFetchers cannot be
136 // referenced from background threads. It is instantiated on the thread |this|
137 // runs on but after that, must only be accessed and eventually destroyed via
138 // the |io_task_runner_|.
139 scoped_ptr<ExternalPolicyDataFetcherBackend>
140 external_policy_data_fetcher_backend_;
142 // The |backend_| handles all download scheduling, validation and caching of
143 // policies. It is instantiated on the thread |this| runs on but after that,
144 // must only be accessed and eventually destroyed via the
145 // |backend_task_runner_|.
146 scoped_ptr<Backend> backend_;
148 // The currently registered components for each policy domain. Used to
149 // determine which components changed when a new SchemaMap becomes
151 scoped_refptr<SchemaMap> current_schema_map_;
152 #endif // !defined(OS_ANDROID) && !defined(OS_IOS)
154 // Contains all the policies loaded from the store, before having been
155 // filtered by the |current_schema_map_|.
156 scoped_ptr<PolicyBundle> unfiltered_policy_;
158 // Contains all the current policies for components, filtered by the
159 // |current_schema_map_|.
160 PolicyBundle policy_;
162 // Whether the backend has started initializing asynchronously. Used to
163 // prevent double initialization, since both OnSchemaRegistryUpdated() and
164 // OnStoreLoaded() can happen while the backend is initializing.
165 bool started_loading_initial_policy_;
167 // Whether the backend has been initialized with the initial credentials and
168 // schemas, and this provider is serving the initial policies loaded from the
170 bool loaded_initial_policy_;
172 // True if the backend currently has valid cloud policy credentials. This
173 // can go back to false if the user signs out, and back again to true if the
174 // user signs in again.
175 bool is_registered_for_cloud_policy_;
177 base::WeakPtrFactory<ComponentCloudPolicyService> weak_ptr_factory_;
179 DISALLOW_COPY_AND_ASSIGN(ComponentCloudPolicyService);
182 } // namespace policy
184 #endif // COMPONENTS_POLICY_CORE_COMMON_CLOUD_COMPONENT_CLOUD_POLICY_SERVICE_H_