Implement cloud policy invalidations using the invalidation service framework.

chrome/browser/policy/cloud/cloud_policy_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_POLICY_CLOUD_CLOUD_POLICY_MANAGER_H_
 #define CHROME_BROWSER_POLICY_CLOUD_CLOUD_POLICY_MANAGER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/prefs/pref_member.h"
 #include "chrome/browser/policy/cloud/cloud_policy_constants.h"
 #include "chrome/browser/policy/cloud/cloud_policy_core.h"
+#include "chrome/browser/policy/cloud/cloud_policy_invalidator.h"
 #include "chrome/browser/policy/cloud/cloud_policy_store.h"
 #include "chrome/browser/policy/configuration_policy_provider.h"
 
 namespace policy {
 
 class PolicyBundle;
 
 // CloudPolicyManager is the main switching central between cloud policy and the
 // upper layers of the policy stack. It wires up a CloudPolicyCore to the
 // ConfigurationPolicyProvider interface.
 //
 // This class contains the base functionality, there are subclasses that add
 // functionality specific to user-level and device-level cloud policy, such as
 // blocking on initial user policy fetch or device enrollment.
 class CloudPolicyManager : public ConfigurationPolicyProvider,
-                           public CloudPolicyStore::Observer {
+                           public CloudPolicyStore::Observer,
+                           public CloudPolicyInvalidationHandler {
  public:
   CloudPolicyManager(const PolicyNamespaceKey& policy_ns_key,
                      CloudPolicyStore* cloud_policy_store);
   virtual ~CloudPolicyManager();
 
   CloudPolicyCore* core() { return &core_; }
   const CloudPolicyCore* core() const { return &core_; }
 
+  // Enables invalidations to the cloud policy. This method must only be
+  // called once.
+  // |initialize_invalidator| should initialize the invalidator when invoked.
+  // If the manager is ready to receive invalidations, it will be invoked
+  // immediately; otherwise, it will be invoked upon becoming ready.
+  void EnableInvalidations(const base::Closure& initialize_invalidator);

[Mattias Nissler (ping if slow), 2013/08/28 14:20:40]

This really shouldn't be here. The invalidator should listen for a proper signal
and then initialize itself.

+
   // ConfigurationPolicyProvider:
   virtual void Shutdown() OVERRIDE;
   virtual bool IsInitializationComplete(PolicyDomain domain) const OVERRIDE;
   virtual void RefreshPolicies() OVERRIDE;
 
   // CloudPolicyStore::Observer:
   virtual void OnStoreLoaded(CloudPolicyStore* cloud_policy_store) OVERRIDE;
   virtual void OnStoreError(CloudPolicyStore* cloud_policy_store) OVERRIDE;
 
+  // CloudPolicyInvalidationHandler:
+  virtual void SetInvalidationInfo(
+      int64 version,
+      const std::string& payload) OVERRIDE;
+  virtual void InvalidatePolicy() OVERRIDE;
+  virtual void OnInvalidatorStateChanged(bool invalidations_enabled) OVERRIDE;
+
  protected:
   // Check whether fully initialized and if so, publish policy by calling
   // ConfigurationPolicyStore::UpdatePolicy().
   void CheckAndPublishPolicy();
 
+  // Starts the policy refresh scheduler. This must be called instead of calling
+  // enabling the scheduler on core() directly so that invalidations are
+  // enabled correctly.
+  void StartRefreshScheduler();
+
   // Called by CheckAndPublishPolicy() to create a bundle with the current
   // policies.
   virtual scoped_ptr<PolicyBundle> CreatePolicyBundle();
 
   // Convenience accessors to core() components.
   CloudPolicyClient* client() { return core_.client(); }
   const CloudPolicyClient* client() const { return core_.client(); }
   CloudPolicyStore* store() { return core_.store(); }
   const CloudPolicyStore* store() const { return core_.store(); }
   CloudPolicyService* service() { return core_.service(); }
   const CloudPolicyService* service() const { return core_.service(); }
 
  private:
   // Completion handler for policy refresh operations.
   void OnRefreshComplete(bool success);
 
   CloudPolicyCore core_;
 
   // Whether there's a policy refresh operation pending, in which case all
   // policy update notifications are deferred until after it completes.
   bool waiting_for_policy_refresh_;
 
+  // Used to initialize the policy invalidator once the refresh scheduler
+  // starts.
+  base::Closure initialize_invalidator_;
+
   DISALLOW_COPY_AND_ASSIGN(CloudPolicyManager);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_CLOUD_CLOUD_POLICY_MANAGER_H_