content/browser/appcache/appcache_quota_client.h

   1 // Copyright (c) 2012 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 #ifndef CONTENT_BROWSER_APPCACHE_APPCACHE_QUOTA_CLIENT_H_
   6 #define CONTENT_BROWSER_APPCACHE_APPCACHE_QUOTA_CLIENT_H_
   7
   8 #include <deque>
   9 #include <map>
  10 #include <string>
  11
  12 #include "base/gtest_prod_util.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "content/browser/appcache/appcache_storage.h"
  16 #include "content/common/content_export.h"
  17 #include "net/base/completion_callback.h"
  18 #include "storage/browser/quota/quota_client.h"
  19 #include "storage/browser/quota/quota_task.h"
  20 #include "storage/common/quota/quota_types.h"
  21
  22 namespace content {
  23 class AppCacheQuotaClientTest;
  24 class AppCacheServiceImpl;
  25 class AppCacheStorageImpl;
  26
  27 // A QuotaClient implementation to integrate the appcache service
  28 // with the quota management system. The QuotaClient interface is
  29 // used on the IO thread by the quota manager. This class deletes
  30 // itself when both the quota manager and the appcache service have
  31 // been destroyed.
  32 class AppCacheQuotaClient : public storage::QuotaClient {
  33  public:
  34   typedef std::deque<base::Closure> RequestQueue;
  35
  36   ~AppCacheQuotaClient() override;
  37
  38   // QuotaClient method overrides
  39   ID id() const override;
  40   void OnQuotaManagerDestroyed() override;
  41   void GetOriginUsage(const GURL& origin,
  42                       storage::StorageType type,
  43                       const GetUsageCallback& callback) override;
  44   void GetOriginsForType(storage::StorageType type,
  45                          const GetOriginsCallback& callback) override;
  46   void GetOriginsForHost(storage::StorageType type,
  47                          const std::string& host,
  48                          const GetOriginsCallback& callback) override;
  49   void DeleteOriginData(const GURL& origin,
  50                         storage::StorageType type,
  51                         const DeletionCallback& callback) override;
  52   bool DoesSupport(storage::StorageType type) const override;
  53
  54  private:
  55   friend class content::AppCacheQuotaClientTest;
  56   friend class AppCacheServiceImpl;  // for NotifyAppCacheIsDestroyed
  57   friend class AppCacheStorageImpl;  // for NotifyAppCacheIsReady
  58
  59   CONTENT_EXPORT
  60       explicit AppCacheQuotaClient(AppCacheServiceImpl* service);
  61
  62   void DidDeleteAppCachesForOrigin(int rv);
  63   void GetOriginsHelper(storage::StorageType type,
  64                         const std::string& opt_host,
  65                         const GetOriginsCallback& callback);
  66   void ProcessPendingRequests();
  67   void DeletePendingRequests();
  68   const AppCacheStorage::UsageMap* GetUsageMap();
  69   net::CancelableCompletionCallback* GetServiceDeleteCallback();
  70
  71   // For use by appcache internals during initialization and shutdown.
  72   CONTENT_EXPORT void NotifyAppCacheReady();
  73   CONTENT_EXPORT void NotifyAppCacheDestroyed();
  74
  75   // Prior to appcache service being ready, we have to queue
  76   // up reqeusts and defer acting on them until we're ready.
  77   RequestQueue pending_batch_requests_;
  78   RequestQueue pending_serial_requests_;
  79
  80   // And once it's ready, we can only handle one delete request at a time,
  81   // so we queue up additional requests while one is in already in progress.
  82   DeletionCallback current_delete_request_callback_;
  83   scoped_ptr<net::CancelableCompletionCallback> service_delete_callback_;
  84
  85   AppCacheServiceImpl* service_;
  86   bool appcache_is_ready_;
  87   bool quota_manager_is_destroyed_;
  88
  89   DISALLOW_COPY_AND_ASSIGN(AppCacheQuotaClient);
  90 };
  91
  92 }  // namespace content
  93
  94 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_QUOTA_CLIENT_H_