src/components/invalidation/invalidation_notifier.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 // An implementation of Invalidator that wraps an invalidation
   6 // client.  Handles the details of connecting to XMPP and hooking it
   7 // up to the invalidation client.
   8 //
   9 // You probably don't want to use this directly; use
  10 // NonBlockingInvalidator.
  11
  12 #ifndef COMPONENTS_INVALIDATION_INVALIDATION_NOTIFIER_H_
  13 #define COMPONENTS_INVALIDATION_INVALIDATION_NOTIFIER_H_
  14
  15 #include <string>
  16
  17 #include "base/basictypes.h"
  18 #include "base/compiler_specific.h"
  19 #include "base/memory/ref_counted.h"
  20 #include "base/memory/scoped_ptr.h"
  21 #include "base/memory/weak_ptr.h"
  22 #include "base/sequenced_task_runner.h"
  23 #include "base/threading/non_thread_safe.h"
  24 #include "components/invalidation/invalidation_export.h"
  25 #include "components/invalidation/invalidation_state_tracker.h"
  26 #include "components/invalidation/invalidator.h"
  27 #include "components/invalidation/invalidator_registrar.h"
  28 #include "components/invalidation/sync_invalidation_listener.h"
  29
  30 namespace notifier {
  31 class PushClient;
  32 }  // namespace notifier
  33
  34 namespace syncer {
  35
  36 // This class must live on the IO thread.
  37 class INVALIDATION_EXPORT_PRIVATE InvalidationNotifier
  38     : public Invalidator,
  39       public SyncInvalidationListener::Delegate,
  40       public base::NonThreadSafe {
  41  public:
  42   // |invalidation_state_tracker| must be initialized.
  43   InvalidationNotifier(
  44       scoped_ptr<SyncNetworkChannel> network_channel,
  45       const std::string& invalidator_client_id,
  46       const UnackedInvalidationsMap& saved_invalidations,
  47       const std::string& invalidation_bootstrap_data,
  48       const base::WeakPtr<InvalidationStateTracker>& invalidation_state_tracker,
  49       scoped_refptr<base::SingleThreadTaskRunner>
  50           invalidation_state_tracker_task_runner,
  51       const std::string& client_info);
  52
  53   ~InvalidationNotifier() override;
  54
  55   // Invalidator implementation.
  56   void RegisterHandler(InvalidationHandler* handler) override;
  57   void UpdateRegisteredIds(InvalidationHandler* handler,
  58                            const ObjectIdSet& ids) override;
  59   void UnregisterHandler(InvalidationHandler* handler) override;
  60   InvalidatorState GetInvalidatorState() const override;
  61   void UpdateCredentials(const std::string& email,
  62                          const std::string& token) override;
  63   void RequestDetailedStatus(base::Callback<void(const base::DictionaryValue&)>
  64                                  callback) const override;
  65
  66   // SyncInvalidationListener::Delegate implementation.
  67   void OnInvalidate(const ObjectIdInvalidationMap& invalidation_map) override;
  68   void OnInvalidatorStateChange(InvalidatorState state) override;
  69
  70  private:
  71   // We start off in the STOPPED state.  When we get our initial
  72   // credentials, we connect and move to the CONNECTING state.  When
  73   // we're connected we start the invalidation client and move to the
  74   // STARTED state.  We never go back to a previous state.
  75   enum State {
  76     STOPPED,
  77     CONNECTING,
  78     STARTED
  79   };
  80   State state_;
  81
  82   InvalidatorRegistrar registrar_;
  83
  84   // Passed to |invalidation_listener_|.
  85   const UnackedInvalidationsMap saved_invalidations_;
  86
  87   // Passed to |invalidation_listener_|.
  88   const base::WeakPtr<InvalidationStateTracker> invalidation_state_tracker_;
  89   scoped_refptr<base::SequencedTaskRunner>
  90       invalidation_state_tracker_task_runner_;
  91
  92   // Passed to |invalidation_listener_|.
  93   const std::string client_info_;
  94
  95   // The client ID to pass to |invalidation_listener_|.
  96   const std::string invalidator_client_id_;
  97
  98   // The initial bootstrap data to pass to |invalidation_listener_|.
  99   const std::string invalidation_bootstrap_data_;
 100
 101   // The invalidation listener.
 102   SyncInvalidationListener invalidation_listener_;
 103
 104   DISALLOW_COPY_AND_ASSIGN(InvalidationNotifier);
 105 };
 106
 107 }  // namespace syncer
 108
 109 #endif  // COMPONENTS_INVALIDATION_INVALIDATION_NOTIFIER_H_