google_apis/gcm/engine/gcm_store_impl.h

   1 // Copyright 2014 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 GOOGLE_APIS_GCM_ENGINE_GCM_STORE_IMPL_H_
   6 #define GOOGLE_APIS_GCM_ENGINE_GCM_STORE_IMPL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "google_apis/gcm/base/gcm_export.h"
  12 #include "google_apis/gcm/engine/gcm_store.h"
  13
  14 namespace base {
  15 class FilePath;
  16 class SequencedTaskRunner;
  17 }  // namespace base
  18
  19 namespace gcm {
  20
  21 class Encryptor;
  22
  23 // An implementation of GCM Store that uses LevelDB for persistence.
  24 // It performs all blocking operations on the blocking task runner, and posts
  25 // all callbacks to the thread on which the GCMStoreImpl is created.
  26 class GCM_EXPORT GCMStoreImpl : public GCMStore {
  27  public:
  28   GCMStoreImpl(const base::FilePath& path,
  29                scoped_refptr<base::SequencedTaskRunner> blocking_task_runner,
  30                scoped_ptr<Encryptor> encryptor);
  31   ~GCMStoreImpl() override;
  32
  33   // Load the directory and pass the initial state back to caller.
  34   void Load(const LoadCallback& callback) override;
  35
  36   // Closes the GCM store.
  37   void Close() override;
  38
  39   // Clears the GCM store of all data and destroys any LevelDB files associated
  40   // with this store.
  41   // WARNING: this will permanently destroy any pending outgoing messages
  42   // and require the device to re-create credentials and serial number mapping
  43   // tables.
  44   void Destroy(const UpdateCallback& callback) override;
  45
  46   // Sets this device's messaging credentials.
  47   void SetDeviceCredentials(uint64 device_android_id,
  48                             uint64 device_security_token,
  49                             const UpdateCallback& callback) override;
  50
  51   // Registration info.
  52   void AddRegistration(const std::string& app_id,
  53                        const linked_ptr<RegistrationInfo>& registration,
  54                        const UpdateCallback& callback) override;
  55   void RemoveRegistration(const std::string& app_id,
  56                           const UpdateCallback& callback) override;
  57
  58   // Unacknowledged incoming message handling.
  59   void AddIncomingMessage(const std::string& persistent_id,
  60                           const UpdateCallback& callback) override;
  61   void RemoveIncomingMessage(const std::string& persistent_id,
  62                              const UpdateCallback& callback) override;
  63   void RemoveIncomingMessages(const PersistentIdList& persistent_ids,
  64                               const UpdateCallback& callback) override;
  65
  66   // Unacknowledged outgoing messages handling.
  67   bool AddOutgoingMessage(const std::string& persistent_id,
  68                           const MCSMessage& message,
  69                           const UpdateCallback& callback) override;
  70   void OverwriteOutgoingMessage(const std::string& persistent_id,
  71                                 const MCSMessage& message,
  72                                 const UpdateCallback& callback) override;
  73   void RemoveOutgoingMessage(const std::string& persistent_id,
  74                              const UpdateCallback& callback) override;
  75   void RemoveOutgoingMessages(const PersistentIdList& persistent_ids,
  76                               const UpdateCallback& callback) override;
  77
  78   // Sets last device's checkin information.
  79   void SetLastCheckinInfo(const base::Time& time,
  80                           const std::set<std::string>& accounts,
  81                           const UpdateCallback& callback) override;
  82
  83   // G-service settings handling.
  84   void SetGServicesSettings(const std::map<std::string, std::string>& settings,
  85                             const std::string& settings_digest,
  86                             const UpdateCallback& callback) override;
  87
  88   // Sets the account information related to device to account mapping.
  89   void AddAccountMapping(const AccountMapping& account_mapping,
  90                          const UpdateCallback& callback) override;
  91   void RemoveAccountMapping(const std::string& account_id,
  92                             const UpdateCallback& callback) override;
  93
  94   // Sets last token fetch time.
  95   void SetLastTokenFetchTime(const base::Time& time,
  96                              const UpdateCallback& callback) override;
  97
  98   // Injects a value to database. Only to be used for testing.
  99   void SetValueForTesting(const std::string& key,
 100                           const std::string& value,
 101                           const UpdateCallback& callback);
 102
 103  private:
 104   typedef std::map<std::string, int> AppIdToMessageCountMap;
 105
 106   // Continuation to update the per-app message counts after a load.
 107   void LoadContinuation(const LoadCallback& callback,
 108                         scoped_ptr<LoadResult> result);
 109
 110   // Continuation to update the per-app message counts when adding messages.
 111   // In particular, if a message fails to add, the message count is decremented.
 112   void AddOutgoingMessageContinuation(const UpdateCallback& callback,
 113                                       const std::string& app_id,
 114                                       bool success);
 115
 116   // Continuation to update the per-app message counts when removing messages.
 117   // Note: if doing a read-then-write when removing messages proves expensive,
 118   // an in-memory mapping of persisted message id to app could be maintained
 119   // instead.
 120   void RemoveOutgoingMessagesContinuation(
 121       const UpdateCallback& callback,
 122       bool success,
 123       const std::map<std::string, int>& removed_message_counts);
 124
 125   class Backend;
 126
 127   // Map of App ids to their message counts.
 128   AppIdToMessageCountMap app_message_counts_;
 129
 130   scoped_refptr<Backend> backend_;
 131   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
 132
 133   base::WeakPtrFactory<GCMStoreImpl> weak_ptr_factory_;
 134
 135   DISALLOW_COPY_AND_ASSIGN(GCMStoreImpl);
 136 };
 137
 138 }  // namespace gcm
 139
 140 #endif  // GOOGLE_APIS_GCM_ENGINE_GCM_STORE_IMPL_H_