Move ownership of the ComponentCloudPolicyService to the broker.

chrome/browser/chromeos/policy/device_local_account_policy_service.cc

 // 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.
 
 #include "chrome/browser/chromeos/policy/device_local_account_policy_service.h"
 
 #include <vector>
 
 #include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/path_service.h"
 #include "base/sequenced_task_runner.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/policy/device_local_account.h"
 #include "chrome/browser/chromeos/policy/device_local_account_external_data_service.h"
 #include "chrome/browser/chromeos/policy/device_local_account_policy_store.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chromeos/chromeos_paths.h"
 #include "chromeos/dbus/session_manager_client.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "chromeos/settings/cros_settings_provider.h"
 #include "components/policy/core/common/cloud/cloud_policy_client.h"
 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
 #include "components/policy/core/common/cloud/cloud_policy_refresh_scheduler.h"
 #include "components/policy/core/common/cloud/device_management_service.h"
+#include "components/policy/core/common/cloud/resource_cache.h"
 #include "components/policy/core/common/cloud/system_policy_request_context.h"
+#include "components/policy/core/common/policy_switches.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "policy/policy_constants.h"
 #include "policy/proto/device_management_backend.pb.h"
 #include "url/gurl.h"
 
 namespace em = enterprise_management;
 
 namespace policy {
 
@@ skipping 21 matching lines @@
   scoped_ptr<CloudPolicyClient> client(
       new CloudPolicyClient(std::string(), std::string(),
                             kPolicyVerificationKeyHash,
                             USER_AFFILIATION_MANAGED,
                             NULL, device_management_service, request_context));
   client->SetupRegistration(policy_data->request_token(),
                             policy_data->device_id());
   return client.Pass();
 }
 
-// Get the subdirectory of the cache directory in which force-installed
-// extensions are cached for |account_id|. This is also used for the
-// component policy cache.
-std::string EncodeAccountId(const std::string& account_id) {
+// Get the subdirectory of the force-installed extension cache and the component
+// policy cache used for |account_id|.
+std::string GetCacheSubdirectoryForAccountID(const std::string& account_id) {
   return base::HexEncode(account_id.c_str(), account_id.size());
 }
 
 // Cleans up the cache directory by removing subdirectories that are not found
 // in |subdirectories_to_keep|. Only caches whose cache directory is found in
 // |subdirectories_to_keep| may be running while the clean-up is in progress.
 void DeleteOrphanedCaches(
     const base::FilePath& cache_root_dir,
     const std::set<std::string>& subdirectories_to_keep) {
   base::FileEnumerator enumerator(cache_root_dir,
                                   false,
                                   base::FileEnumerator::DIRECTORIES);
   for (base::FilePath path = enumerator.Next(); !path.empty();
        path = enumerator.Next()) {
     const std::string subdirectory(path.BaseName().MaybeAsASCII());
     if (!ContainsKey(subdirectories_to_keep, subdirectory))
       base::DeleteFile(path, true);
   }
 }
 
 // Removes the subdirectory belonging to |account_id_to_delete| from the cache
 // directory. No cache belonging to |account_id_to_delete| may be running while
 // the removal is in progress.
 void DeleteObsoleteExtensionCache(const std::string& account_id_to_delete) {
   base::FilePath cache_root_dir;
   CHECK(PathService::Get(chromeos::DIR_DEVICE_LOCAL_ACCOUNT_EXTENSIONS,
                          &cache_root_dir));
-  const base::FilePath path =
-      cache_root_dir.Append(EncodeAccountId(account_id_to_delete));
+  const base::FilePath path = cache_root_dir.Append(
+      GetCacheSubdirectoryForAccountID(account_id_to_delete));
   if (base::DirectoryExists(path))
     base::DeleteFile(path, true);
 }
 
 }  // namespace
 
 DeviceLocalAccountPolicyBroker::DeviceLocalAccountPolicyBroker(
     const DeviceLocalAccount& account,
     const base::FilePath& component_policy_cache_path,
     scoped_ptr<DeviceLocalAccountPolicyStore> store,
     scoped_refptr<DeviceLocalAccountExternalDataManager> external_data_manager,
+    const base::Closure& policy_update_callback,
     const scoped_refptr<base::SequencedTaskRunner>& task_runner)
     : account_id_(account.account_id),
       user_id_(account.user_id),
       component_policy_cache_path_(component_policy_cache_path),
       store_(store.Pass()),
       external_data_manager_(external_data_manager),
       core_(PolicyNamespaceKey(dm_protocol::kChromePublicAccountPolicyType,
                                store_->account_id()),
             store_.get(),
-            task_runner) {
+            task_runner),
+      policy_update_callback_(policy_update_callback) {
   base::FilePath cache_root_dir;
   CHECK(PathService::Get(chromeos::DIR_DEVICE_LOCAL_ACCOUNT_EXTENSIONS,
                          &cache_root_dir));
   extension_loader_ = new chromeos::DeviceLocalAccountExternalPolicyLoader(
-      store_.get(), cache_root_dir.Append(EncodeAccountId(account.account_id)));
+      store_.get(),
+      cache_root_dir.Append(
+          GetCacheSubdirectoryForAccountID(account.account_id)));
+  store_->AddObserver(this);
 }
 
 DeviceLocalAccountPolicyBroker::~DeviceLocalAccountPolicyBroker() {
+  store_->RemoveObserver(this);
   external_data_manager_->SetPolicyStore(NULL);
   external_data_manager_->Disconnect();
 }
 
 void DeviceLocalAccountPolicyBroker::Initialize() {
   store_->Load();
 }
 
 void DeviceLocalAccountPolicyBroker::ConnectIfPossible(
     chromeos::DeviceSettingsService* device_settings_service,
     DeviceManagementService* device_management_service,
     scoped_refptr<net::URLRequestContextGetter> request_context) {
   if (core_.client())
     return;
 
   scoped_ptr<CloudPolicyClient> client(CreateClient(device_settings_service,
                                                     device_management_service,
                                                     request_context));
   if (!client)
     return;
 
   core_.Connect(client.Pass());
   external_data_manager_->Connect(request_context);
   core_.StartRefreshScheduler();
   UpdateRefreshDelay();
+  CreateComponentCloudPolicyService(request_context);
 }
 
 void DeviceLocalAccountPolicyBroker::UpdateRefreshDelay() {
   if (core_.refresh_scheduler()) {
     const base::Value* policy_value =
         store_->policy_map().GetValue(key::kPolicyRefreshRate);
     int delay = 0;
     if (policy_value && policy_value->GetAsInteger(&delay))
       core_.refresh_scheduler()->SetRefreshDelay(delay);
   }
 }
 
 std::string DeviceLocalAccountPolicyBroker::GetDisplayName() const {
   std::string display_name;
   const base::Value* display_name_value =
       store_->policy_map().GetValue(policy::key::kUserDisplayName);
   if (display_name_value)
     display_name_value->GetAsString(&display_name);
   return display_name;
 }
 
-base::FilePath DeviceLocalAccountPolicyBroker::GetComponentPolicyCachePath()
-    const {
-  return component_policy_cache_path_;
+void DeviceLocalAccountPolicyBroker::OnStoreLoaded(CloudPolicyStore* store) {
+  UpdateRefreshDelay();
+  policy_update_callback_.Run();
+}
+
+void DeviceLocalAccountPolicyBroker::OnStoreError(CloudPolicyStore* store) {
+  policy_update_callback_.Run();
+}
+
+void DeviceLocalAccountPolicyBroker::OnComponentCloudPolicyUpdated() {
+  policy_update_callback_.Run();
+}
+
+void DeviceLocalAccountPolicyBroker::CreateComponentCloudPolicyService(
+    const scoped_refptr<net::URLRequestContextGetter>& request_context) {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableComponentCloudPolicy)) {
+    // Disabled via the command line.
+    return;
+  }
+
+  scoped_ptr<ResourceCache> resource_cache(
+      new ResourceCache(component_policy_cache_path_,
+                        content::BrowserThread::GetMessageLoopProxyForThread(
+                            content::BrowserThread::FILE)));
+
+  component_policy_service_.reset(new ComponentCloudPolicyService(
+      this,
+      &schema_registry_,
+      core(),
+      resource_cache.Pass(),
+      request_context,
+      content::BrowserThread::GetMessageLoopProxyForThread(
+          content::BrowserThread::FILE),
+      content::BrowserThread::GetMessageLoopProxyForThread(
+          content::BrowserThread::IO)));
 }
 
 DeviceLocalAccountPolicyService::DeviceLocalAccountPolicyService(
     chromeos::SessionManagerClient* session_manager_client,
     chromeos::DeviceSettingsService* device_settings_service,
     chromeos::CrosSettings* cros_settings,
     scoped_refptr<base::SequencedTaskRunner> store_background_task_runner,
     scoped_refptr<base::SequencedTaskRunner> extension_cache_task_runner,
     scoped_refptr<base::SequencedTaskRunner>
         external_data_service_backend_task_runner,
     scoped_refptr<base::SequencedTaskRunner> io_task_runner,
     scoped_refptr<net::URLRequestContextGetter> request_context)
     : session_manager_client_(session_manager_client),
       device_settings_service_(device_settings_service),
       cros_settings_(cros_settings),
       device_management_service_(NULL),
       waiting_for_cros_settings_(false),
-      orphan_cache_deletion_state_(NOT_STARTED),
+      orphan_extension_cache_deletion_state_(NOT_STARTED),
       store_background_task_runner_(store_background_task_runner),
       extension_cache_task_runner_(extension_cache_task_runner),
       request_context_(request_context),
       local_accounts_subscription_(cros_settings_->AddSettingsObserver(
           chromeos::kAccountsPrefDeviceLocalAccounts,
           base::Bind(&DeviceLocalAccountPolicyService::
                          UpdateAccountListIfNonePending,
                      base::Unretained(this)))),
       weak_factory_(this) {
   CHECK(PathService::Get(chromeos::DIR_DEVICE_LOCAL_ACCOUNT_COMPONENT_POLICY,
@@ skipping 39 matching lines @@
 
   return entry->second;
 }
 
 bool DeviceLocalAccountPolicyService::IsPolicyAvailableForUser(
     const std::string& user_id) {
   DeviceLocalAccountPolicyBroker* broker = GetBrokerForUser(user_id);
   return broker && broker->core()->store()->is_managed();
 }
 
-scoped_refptr<net::URLRequestContextGetter>
-DeviceLocalAccountPolicyService::request_context() const {
-  return request_context_;
-}
-
 void DeviceLocalAccountPolicyService::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void DeviceLocalAccountPolicyService::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
-void DeviceLocalAccountPolicyService::OnStoreLoaded(CloudPolicyStore* store) {
-  DeviceLocalAccountPolicyBroker* broker = GetBrokerForStore(store);
-  DCHECK(broker);
-  if (!broker)
-    return;
-  broker->UpdateRefreshDelay();
-  FOR_EACH_OBSERVER(Observer, observers_, OnPolicyUpdated(broker->user_id()));
-}
-
-void DeviceLocalAccountPolicyService::OnStoreError(CloudPolicyStore* store) {
-  DeviceLocalAccountPolicyBroker* broker = GetBrokerForStore(store);
-  DCHECK(broker);
-  if (!broker)
-    return;
-  FOR_EACH_OBSERVER(Observer, observers_, OnPolicyUpdated(broker->user_id()));
-}
-
 bool DeviceLocalAccountPolicyService::IsExtensionCacheDirectoryBusy(
     const std::string& account_id) {
   return busy_extension_cache_directories_.find(account_id) !=
             busy_extension_cache_directories_.end();
 }
 
 void DeviceLocalAccountPolicyService::StartExtensionCachesIfPossible() {
   for (PolicyBrokerMap::iterator it = policy_brokers_.begin();
        it != policy_brokers_.end(); ++it) {
     if (!it->second->extension_loader()->IsCacheRunning() &&
@@ skipping 10 matching lines @@
     if (it->second->account_id() == account_id) {
       DCHECK(!it->second->extension_loader()->IsCacheRunning());
       it->second->extension_loader()->StartCache(extension_cache_task_runner_);
       return true;
     }
   }
   return false;
 }
 
 void DeviceLocalAccountPolicyService::OnOrphanedExtensionCachesDeleted() {
-  DCHECK_EQ(IN_PROGRESS, orphan_cache_deletion_state_);
+  DCHECK_EQ(IN_PROGRESS, orphan_extension_cache_deletion_state_);
 
-  orphan_cache_deletion_state_ = DONE;
+  orphan_extension_cache_deletion_state_ = DONE;
   StartExtensionCachesIfPossible();
 }
 
 void DeviceLocalAccountPolicyService::OnObsoleteExtensionCacheShutdown(
     const std::string& account_id) {
-  DCHECK_NE(NOT_STARTED, orphan_cache_deletion_state_);
+  DCHECK_NE(NOT_STARTED, orphan_extension_cache_deletion_state_);
   DCHECK(IsExtensionCacheDirectoryBusy(account_id));
 
   // The account with |account_id| was deleted and the broker for it has shut
   // down completely.
 
   if (StartExtensionCacheForAccountIfPresent(account_id)) {
     // If another account with the same ID was created in the meantime, its
     // extension cache is started, reusing the cache directory. The directory no
     // longer needs to be marked as busy in this case.
     busy_extension_cache_directories_.erase(account_id);
     return;
   }
 
   // If no account with |account_id| exists anymore, the cache directory should
   // be removed. The directory must stay marked as busy while the removal is in
   // progress.
   extension_cache_task_runner_->PostTaskAndReply(
       FROM_HERE,
       base::Bind(&DeleteObsoleteExtensionCache, account_id),
       base::Bind(&DeviceLocalAccountPolicyService::
                      OnObsoleteExtensionCacheDeleted,
                  weak_factory_.GetWeakPtr(),
                  account_id));
 }
 
 void DeviceLocalAccountPolicyService::OnObsoleteExtensionCacheDeleted(
     const std::string& account_id) {
-  DCHECK_EQ(DONE, orphan_cache_deletion_state_);
+  DCHECK_EQ(DONE, orphan_extension_cache_deletion_state_);
   DCHECK(IsExtensionCacheDirectoryBusy(account_id));
 
   // The cache directory for |account_id| has been deleted. The directory no
   // longer needs to be marked as busy.
   busy_extension_cache_directories_.erase(account_id);
 
   // If another account with the same ID was created in the meantime, start its
   // extension cache, creating a new cache directory.
   StartExtensionCacheForAccountIfPresent(account_id);
 }
@@ skipping 40 matching lines @@
       // Reuse the existing broker if present.
       broker.reset(broker_it->second);
       old_policy_brokers.erase(broker_it);
       broker_initialized = true;
     } else {
       scoped_ptr<DeviceLocalAccountPolicyStore> store(
           new DeviceLocalAccountPolicyStore(it->account_id,
                                             session_manager_client_,
                                             device_settings_service_,
                                             store_background_task_runner_));
-      store->AddObserver(this);
       scoped_refptr<DeviceLocalAccountExternalDataManager>
           external_data_manager =
               external_data_service_->GetExternalDataManager(it->account_id,
                                                              store.get());
       broker.reset(new DeviceLocalAccountPolicyBroker(
           *it,
-          component_policy_cache_root_.Append(EncodeAccountId(it->account_id)),
+          component_policy_cache_root_.Append(
+              GetCacheSubdirectoryForAccountID(it->account_id)),
           store.Pass(),
           external_data_manager,
+          base::Bind(&DeviceLocalAccountPolicyService::NotifyPolicyUpdated,
+                     base::Unretained(this),
+                     it->user_id),
           base::MessageLoopProxy::current()));
     }
 
     // Fire up the cloud connection for fetching policy for the account from
     // the cloud if this is an enterprise-managed device.
     broker->ConnectIfPossible(device_settings_service_,
                               device_management_service_,
                               request_context_);
 
     policy_brokers_[it->user_id] = broker.release();
     if (!broker_initialized) {
       // The broker must be initialized after it has been added to
       // |policy_brokers_|.
       policy_brokers_[it->user_id]->Initialize();
     }
 
-    subdirectories_to_keep.insert(EncodeAccountId(it->account_id));
+    subdirectories_to_keep.insert(
+        GetCacheSubdirectoryForAccountID(it->account_id));
   }
 
-  if (orphan_cache_deletion_state_ == NOT_STARTED) {
+  if (orphan_extension_cache_deletion_state_ == NOT_STARTED) {
     DCHECK(old_policy_brokers.empty());
     DCHECK(busy_extension_cache_directories_.empty());
 
     // If this method is running for the first time, no extension caches have
     // been started yet. Take this opportunity to do a clean-up by removing
     // orphaned cache directories not found in |subdirectories_to_keep| from the
     // cache directory.
-    orphan_cache_deletion_state_ = IN_PROGRESS;
+    orphan_extension_cache_deletion_state_ = IN_PROGRESS;
 
     base::FilePath cache_root_dir;
     CHECK(PathService::Get(chromeos::DIR_DEVICE_LOCAL_ACCOUNT_EXTENSIONS,
                            &cache_root_dir));
     extension_cache_task_runner_->PostTaskAndReply(
         FROM_HERE,
         base::Bind(
             &DeleteOrphanedCaches, cache_root_dir, subdirectories_to_keep),
         base::Bind(
             &DeviceLocalAccountPolicyService::OnOrphanedExtensionCachesDeleted,
             weak_factory_.GetWeakPtr()));
 
     // Start the extension caches for all brokers. These belong to accounts in
     // |account_ids| and are not affected by the clean-up.
     StartExtensionCachesIfPossible();
   } else {
     // If this method has run before, obsolete brokers may exist. Shut down
     // their extension caches and delete the brokers.
     DeleteBrokers(&old_policy_brokers);
 
-    if (orphan_cache_deletion_state_ == DONE) {
+    if (orphan_extension_cache_deletion_state_ == DONE) {
       // If the initial clean-up of orphaned cache directories has been
       // complete, start any extension caches that are not running yet but can
       // be started now because their cache directories are not busy.
       StartExtensionCachesIfPossible();
     }
   }
 
   // Purge the component policy caches of any accounts that have been removed.
   // Do this only after any obsolete brokers have been destroyed.
   // TODO(joaodasilva): for now this must be posted to the FILE thread,
   // to avoid racing with the ComponentCloudPolicyStore. Use a task runner
   // once that class supports another background thread too.
   content::BrowserThread::PostTask(content::BrowserThread::FILE, FROM_HERE,
                                    base::Bind(&DeleteOrphanedCaches,
                                               component_policy_cache_root_,
                                               subdirectories_to_keep));
 
   FOR_EACH_OBSERVER(Observer, observers_, OnDeviceLocalAccountsChanged());
 }
 
 void DeviceLocalAccountPolicyService::DeleteBrokers(PolicyBrokerMap* map) {
   for (PolicyBrokerMap::iterator it = map->begin(); it != map->end(); ++it) {
-    it->second->core()->store()->RemoveObserver(this);
     scoped_refptr<chromeos::DeviceLocalAccountExternalPolicyLoader>
         extension_loader = it->second->extension_loader();
     if (extension_loader->IsCacheRunning()) {
       DCHECK(!IsExtensionCacheDirectoryBusy(it->second->account_id()));
       busy_extension_cache_directories_.insert(it->second->account_id());
       extension_loader->StopCache(base::Bind(
           &DeviceLocalAccountPolicyService::OnObsoleteExtensionCacheShutdown,
           weak_factory_.GetWeakPtr(),
           it->second->account_id()));
     }
-    FOR_EACH_OBSERVER(Observer, observers_, OnBrokerShutdown(it->second));
+
     delete it->second;
   }
   map->clear();
 }
 
 DeviceLocalAccountPolicyBroker*
     DeviceLocalAccountPolicyService::GetBrokerForStore(
         CloudPolicyStore* store) {
   for (PolicyBrokerMap::iterator it(policy_brokers_.begin());
        it != policy_brokers_.end(); ++it) {
     if (it->second->core()->store() == store)
       return it->second;
   }
   return NULL;
 }
 
+void DeviceLocalAccountPolicyService::NotifyPolicyUpdated(
+    const std::string& user_id) {
+  FOR_EACH_OBSERVER(Observer, observers_, OnPolicyUpdated(user_id));
+}
+
 }  // namespace policy