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      1 // Copyright (c) 2011 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.
      4 //
      5 // The AllStatus object watches various sync engine components and aggregates
      6 // the status of all of them into one place.
      7 
      8 #ifndef CHROME_BROWSER_SYNC_ENGINE_ALL_STATUS_H_
      9 #define CHROME_BROWSER_SYNC_ENGINE_ALL_STATUS_H_
     10 #pragma once
     11 
     12 #include <map>
     13 
     14 #include "base/memory/scoped_ptr.h"
     15 #include "base/synchronization/lock.h"
     16 #include "chrome/browser/sync/engine/syncapi.h"
     17 #include "chrome/browser/sync/engine/syncer_types.h"
     18 
     19 namespace browser_sync {
     20 
     21 class ScopedStatusLock;
     22 class ServerConnectionManager;
     23 class Syncer;
     24 class SyncerThread;
     25 struct AuthWatcherEvent;
     26 struct ServerConnectionEvent;
     27 
     28 class AllStatus : public SyncEngineEventListener {
     29   friend class ScopedStatusLock;
     30  public:
     31 
     32   AllStatus();
     33   ~AllStatus();
     34 
     35   void HandleServerConnectionEvent(const ServerConnectionEvent& event);
     36 
     37   void HandleAuthWatcherEvent(const AuthWatcherEvent& event);
     38 
     39   virtual void OnSyncEngineEvent(const SyncEngineEvent& event);
     40 
     41   sync_api::SyncManager::Status status() const;
     42 
     43   void SetNotificationsEnabled(bool notifications_enabled);
     44 
     45   void IncrementNotificationsSent();
     46 
     47   void IncrementNotificationsReceived();
     48 
     49  protected:
     50   // Examines syncer to calculate syncing and the unsynced count,
     51   // and returns a Status with new values.
     52   sync_api::SyncManager::Status CalcSyncing(const SyncEngineEvent& event) const;
     53   sync_api::SyncManager::Status CreateBlankStatus() const;
     54 
     55   // Examines status to see what has changed, updates old_status in place.
     56   void CalcStatusChanges();
     57 
     58   sync_api::SyncManager::Status status_;
     59 
     60   mutable base::Lock mutex_;  // Protects all data members.
     61   DISALLOW_COPY_AND_ASSIGN(AllStatus);
     62 };
     63 
     64 class ScopedStatusLock {
     65  public:
     66   explicit ScopedStatusLock(AllStatus* allstatus);
     67   ~ScopedStatusLock();
     68  protected:
     69   AllStatus* allstatus_;
     70 };
     71 
     72 }  // namespace browser_sync
     73 
     74 #endif  // CHROME_BROWSER_SYNC_ENGINE_ALL_STATUS_H_
     75