Device policy infrastructure

chrome/browser/policy/cloud_policy_subsystem.cc

+// Copyright (c) 2011 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/policy/cloud_policy_subsystem.h"
+
+#include <algorithm>
+#include <string>
+
+#include "base/command_line.h"
+#include "chrome/browser/policy/cloud_policy_cache.h"
+#include "chrome/browser/policy/cloud_policy_controller.h"
+#include "chrome/browser/policy/cloud_policy_identity_strategy.h"
+#include "chrome/browser/policy/configuration_policy_provider.h"
+#include "chrome/browser/policy/device_management_service.h"
+#include "chrome/browser/policy/device_token_fetcher.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/notification_details.h"
+#include "chrome/common/notification_source.h"
+#include "chrome/common/notification_type.h"
+
+namespace {
+
+// Refresh rate sanity interval bounds.
+const int64 kPolicyRefreshRateMinMs = 30 * 60 * 1000;  // 30 minutes
+const int64 kPolicyRefreshRateMaxMs = 24 * 60 * 60 * 1000;  // 1 day
+
+}  // namespace
+
+namespace policy {
+
+CloudPolicySubsystem::CloudPolicySubsystem(
+    const FilePath& policy_cache_file,
+    CloudPolicyIdentityStrategy* identity_strategy)
+    : prefs_(NULL) {
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kDeviceManagementUrl)) {
+    device_management_service_.reset(new DeviceManagementService(
+        command_line->GetSwitchValueASCII(switches::kDeviceManagementUrl)));
+    cloud_policy_cache_.reset(new CloudPolicyCache(policy_cache_file));
+    cloud_policy_cache_->LoadFromFile();
+
+    device_token_fetcher_.reset(
+        new DeviceTokenFetcher(device_management_service_.get(),
+                               cloud_policy_cache_.get()));
+
+    cloud_policy_controller_.reset(
+        new CloudPolicyController(cloud_policy_cache_.get(),
+                                  device_management_service_->CreateBackend(),
+                                  device_token_fetcher_.get(),
+                                  identity_strategy));
+  }
+}
+
+CloudPolicySubsystem::~CloudPolicySubsystem() {
+  DCHECK(!prefs_);
+  cloud_policy_controller_.reset();
+  device_token_fetcher_.reset();
+  cloud_policy_cache_.reset();
+  device_management_service_.reset();
+}
+
+void CloudPolicySubsystem::Initialize(
+    PrefService* prefs,
+    const char* refresh_rate_pref_name,
+    URLRequestContextGetter* request_context) {
+  DCHECK(!prefs_);
+  prefs_ = prefs;
+
+  if (device_management_service_.get())
+    device_management_service_->Initialize(request_context);
+
+  policy_refresh_rate_.Init(refresh_rate_pref_name, prefs_, this);
+  UpdatePolicyRefreshRate();
+}
+
+void CloudPolicySubsystem::Shutdown() {
+  if (device_management_service_.get())
+    device_management_service_->Shutdown();
+  cloud_policy_controller_.reset();
+  cloud_policy_cache_.reset();
+  policy_refresh_rate_.Destroy();
+  prefs_ = NULL;
+}
+
+ConfigurationPolicyProvider* CloudPolicySubsystem::GetManagedPolicyProvider() {
+  if (cloud_policy_cache_.get())
+    return cloud_policy_cache_->GetManagedPolicyProvider();
+
+  return NULL;
+}
+
+ConfigurationPolicyProvider*
+    CloudPolicySubsystem::GetRecommendedPolicyProvider() {
+  if (cloud_policy_cache_.get())
+    return cloud_policy_cache_->GetRecommendedPolicyProvider();
+
+  return NULL;
+}
+
+void CloudPolicySubsystem::UpdatePolicyRefreshRate() {
+  if (cloud_policy_controller_.get()) {
+    // Clamp to sane values.
+    int64 refresh_rate = policy_refresh_rate_.GetValue();
+    refresh_rate = std::max(kPolicyRefreshRateMinMs, refresh_rate);
+    refresh_rate = std::min(kPolicyRefreshRateMaxMs, refresh_rate);
+    cloud_policy_controller_->SetRefreshRate(refresh_rate);
+  }
+}
+
+void CloudPolicySubsystem::Observe(NotificationType type,
+                                   const NotificationSource& source,
+                                   const NotificationDetails& details) {
+  if (type == NotificationType::PREF_CHANGED &&
+      policy_refresh_rate_.GetPrefName() ==
+          *(Details<std::string>(details).ptr()) &&
+      prefs_ == Source<PrefService>(source).ptr()) {
+    UpdatePolicyRefreshRate();
+  } else {
+    NOTREACHED();
+  }
+}
+
+}  // namespace policy