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[chromium-blink-merge.git] / chrome / browser / chromeos / extensions / device_local_account_external_policy_loader.h
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1 // Copyright 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 CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEVICE_LOCAL_ACCOUNT_EXTERNAL_POLICY_LOADER_H_
6 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEVICE_LOCAL_ACCOUNT_EXTERNAL_POLICY_LOADER_H_
8 #include "base/basictypes.h"
9 #include "base/callback_forward.h"
10 #include "base/compiler_specific.h"
11 #include "base/files/file_path.h"
12 #include "base/memory/ref_counted.h"
13 #include "base/memory/scoped_ptr.h"
14 #include "base/sequenced_task_runner.h"
15 #include "chrome/browser/chromeos/extensions/external_cache.h"
16 #include "chrome/browser/extensions/external_loader.h"
17 #include "components/policy/core/common/cloud/cloud_policy_store.h"
19 namespace chromeos {
21 // A specialization of the ExternalLoader that serves external extensions from
22 // the enterprise policy force-install list. This class is used for device-local
23 // accounts in place of the ExternalPolicyLoader. The difference is that while
24 // the ExternalPolicyLoader requires extensions to be downloaded on-the-fly,
25 // this class caches them, allowing for offline installation.
26 class DeviceLocalAccountExternalPolicyLoader
27 : public extensions::ExternalLoader,
28 public policy::CloudPolicyStore::Observer,
29 public ExternalCache::Delegate {
30 public:
31 // The list of force-installed extensions will be read from |store| and the
32 // extensions will be cached in the |cache_dir_|.
33 DeviceLocalAccountExternalPolicyLoader(policy::CloudPolicyStore* store,
34 const base::FilePath& cache_dir);
36 // While running, the cache requires exclusive write access to the
37 // |cache_dir_|.
38 bool IsCacheRunning() const;
40 // Start the cache. This method must only be invoked when there are no pending
41 // write operations to |cache_dir_| on any thread and none will be initiated
42 // while the cache is running.
43 void StartCache(
44 const scoped_refptr<base::SequencedTaskRunner>& cache_task_runner);
46 // Stop the cache. The |callback| will be invoked when the cache has shut down
47 // completely and write access to the |cache_dir_| is permitted again.
48 void StopCache(const base::Closure& callback);
50 // extensions::ExternalLoader:
51 void StartLoading() override;
53 // policy::CloudPolicyStore::Observer:
54 void OnStoreLoaded(policy::CloudPolicyStore* store) override;
55 void OnStoreError(policy::CloudPolicyStore* store) override;
57 // ExternalCache::Delegate:
58 void OnExtensionListsUpdated(const base::DictionaryValue* prefs) override;
60 ExternalCache* GetExternalCacheForTesting();
62 private:
63 // If the cache was started, it must be stopped before |this| is destroyed.
64 ~DeviceLocalAccountExternalPolicyLoader() override;
66 // Pass the current list of force-installed extensions from the |store_| to
67 // the |external_cache_|.
68 void UpdateExtensionListFromStore();
70 policy::CloudPolicyStore* store_;
71 const base::FilePath cache_dir_;
72 scoped_ptr<ExternalCache> external_cache_;
74 DISALLOW_COPY_AND_ASSIGN(DeviceLocalAccountExternalPolicyLoader);
77 } // namespace chromeos
79 #endif // CHROME_BROWSER_CHROMEOS_EXTENSIONS_DEVICE_LOCAL_ACCOUNT_EXTERNAL_POLICY_LOADER_H_