Provide monitoring of usage for a storage type and origin

webkit/browser/quota/usage_tracker.h

 // Copyright 2013 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 WEBKIT_BROWSER_QUOTA_USAGE_TRACKER_H_
 #define WEBKIT_BROWSER_QUOTA_USAGE_TRACKER_H_
 
 #include <list>
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "url/gurl.h"
 #include "webkit/browser/quota/quota_callbacks.h"
 #include "webkit/browser/quota/quota_client.h"
 #include "webkit/browser/quota/quota_task.h"
 #include "webkit/browser/quota/special_storage_policy.h"
 #include "webkit/browser/webkit_storage_browser_export.h"
 #include "webkit/common/quota/quota_types.h"
 
 namespace quota {
 
 class ClientUsageTracker;
+class StorageMonitor;
 
 // A helper class that gathers and tracks the amount of data stored in
 // all quota clients.
 // An instance of this class is created per storage type.
 class WEBKIT_STORAGE_BROWSER_EXPORT UsageTracker : public QuotaTaskObserver {
  public:
   UsageTracker(const QuotaClientList& clients, StorageType type,
-               SpecialStoragePolicy* special_storage_policy);
+               SpecialStoragePolicy* special_storage_policy,
+               StorageMonitor* storage_monitor);
   virtual ~UsageTracker();
 
   StorageType type() const { return type_; }
   ClientUsageTracker* GetClientTracker(QuotaClient::ID client_id);
 
   void GetGlobalLimitedUsage(const UsageCallback& callback);
   void GetGlobalUsage(const GlobalUsageCallback& callback);
   void GetHostUsage(const std::string& host, const UsageCallback& callback);
   void UpdateUsageCache(QuotaClient::ID client_id,
                         const GURL& origin,
@@ skipping 29 matching lines @@
                                  const std::string& host,
                                  int64 usage);
 
   const StorageType type_;
   ClientTrackerMap client_tracker_map_;
 
   UsageCallbackQueue global_limited_usage_callbacks_;
   GlobalUsageCallbackQueue global_usage_callbacks_;
   HostUsageCallbackMap host_usage_callbacks_;
 
+  StorageMonitor* storage_monitor_;
+
   base::WeakPtrFactory<UsageTracker> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(UsageTracker);
 };
 
 // This class holds per-client usage tracking information and caches per-host
 // usage data.  An instance of this class is created per client.
 class ClientUsageTracker : public SpecialStoragePolicy::Observer,
                            public base::NonThreadSafe,
                            public base::SupportsWeakPtr<ClientUsageTracker> {
  public:
   typedef base::Callback<void(int64 limited_usage,
                               int64 unlimited_usage)> HostUsageAccumulator;
   typedef base::Callback<void(const GURL& origin,
                               int64 usage)> OriginUsageAccumulator;
   typedef std::map<std::string, std::set<GURL> > OriginSetByHost;
 
   ClientUsageTracker(UsageTracker* tracker,
                      QuotaClient* client,
                      StorageType type,
-                     SpecialStoragePolicy* special_storage_policy);
+                     SpecialStoragePolicy* special_storage_policy,
+                     StorageMonitor* storage_monitor);
   virtual ~ClientUsageTracker();
 
   void GetGlobalLimitedUsage(const UsageCallback& callback);
   void GetGlobalUsage(const GlobalUsageCallback& callback);
   void GetHostUsage(const std::string& host, const UsageCallback& callback);
   void UpdateUsageCache(const GURL& origin, int64 delta);
   void GetCachedHostsUsage(std::map<std::string, int64>* host_usage) const;
   void GetCachedOrigins(std::set<GURL>* origins) const;
   int64 GetCachedOriginsUsage(const std::set<GURL>& origins,
                               std::vector<GURL>* origins_not_in_cache);
@@ skipping 30 matching lines @@
   void DidGetOriginsForHostUsage(const std::string& host,
                                  const std::set<GURL>& origins);
 
   void GetUsageForOrigins(const std::string& host,
                           const std::set<GURL>& origins);
   void AccumulateOriginUsage(AccumulateInfo* info,
                              const std::string& host,
                              const GURL& origin,
                              int64 usage);
 
+  void DidGetHostUsageAfterUpdate(const GURL& origin, int64 usage);
+
   // Methods used by our GatherUsage tasks, as a task makes progress
   // origins and hosts are added incrementally to the cache.
   void AddCachedOrigin(const GURL& origin, int64 usage);
   void AddCachedHost(const std::string& host);
 
   int64 GetCachedHostUsage(const std::string& host) const;
   int64 GetCachedGlobalUnlimitedUsage();
   bool GetCachedOriginUsage(const GURL& origin, int64* usage) const;
 
   // SpecialStoragePolicy::Observer overrides
   virtual void OnGranted(const GURL& origin, int change_flags) OVERRIDE;
   virtual void OnRevoked(const GURL& origin, int change_flags) OVERRIDE;
   virtual void OnCleared() OVERRIDE;
 
   bool IsStorageUnlimited(const GURL& origin) const;
 
   UsageTracker* tracker_;
   QuotaClient* client_;
   const StorageType type_;
+  StorageMonitor* storage_monitor_;
 
   int64 global_limited_usage_;
   int64 global_unlimited_usage_;
   bool global_usage_retrieved_;
   HostSet cached_hosts_;
   HostUsageMap cached_usage_by_host_;
 
   OriginSetByHost non_cached_limited_origins_by_host_;
   OriginSetByHost non_cached_unlimited_origins_by_host_;
 
   GlobalUsageCallbackQueue global_usage_callback_;
   HostUsageAccumulatorMap host_usage_accumulators_;
 
   scoped_refptr<SpecialStoragePolicy> special_storage_policy_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientUsageTracker);
 };
 
 }  // namespace quota
 
 #endif  // WEBKIT_BROWSER_QUOTA_USAGE_TRACKER_H_