sync/internal_api/js_mutation_event_observer.h

   1 // Copyright 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 SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_
   6 #define SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/threading/non_thread_safe.h"
  14 #include "sync/base/sync_export.h"
  15 #include "sync/internal_api/public/sync_manager.h"
  16 #include "sync/internal_api/public/util/weak_handle.h"
  17 #include "sync/syncable/transaction_observer.h"
  18
  19 namespace tracked_objects {
  20 class Location;
  21 }  // namespace tracked_objects
  22
  23 namespace syncer {
  24
  25 class JsEventDetails;
  26 class JsEventHandler;
  27
  28 // Observes all change- and transaction-related events and routes a
  29 // summarized version to a JsEventHandler.
  30 class SYNC_EXPORT_PRIVATE JsMutationEventObserver
  31     : public SyncManager::ChangeObserver,
  32       public syncable::TransactionObserver,
  33       public base::NonThreadSafe {
  34  public:
  35   JsMutationEventObserver();
  36
  37   virtual ~JsMutationEventObserver();
  38
  39   base::WeakPtr<JsMutationEventObserver> AsWeakPtr();
  40
  41   void InvalidateWeakPtrs();
  42
  43   void SetJsEventHandler(const WeakHandle<JsEventHandler>& event_handler);
  44
  45   // SyncManager::ChangeObserver implementation.
  46   virtual void OnChangesApplied(
  47       ModelType model_type,
  48       int64 write_transaction_id,
  49       const ImmutableChangeRecordList& changes) OVERRIDE;
  50   virtual void OnChangesComplete(ModelType model_type) OVERRIDE;
  51
  52   // syncable::TransactionObserver implementation.
  53   virtual void OnTransactionWrite(
  54       const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
  55       ModelTypeSet models_with_changes) OVERRIDE;
  56
  57  private:
  58   base::WeakPtrFactory<JsMutationEventObserver> weak_ptr_factory_;
  59   WeakHandle<JsEventHandler> event_handler_;
  60
  61   void HandleJsEvent(
  62     const tracked_objects::Location& from_here,
  63     const std::string& name, const JsEventDetails& details);
  64
  65   DISALLOW_COPY_AND_ASSIGN(JsMutationEventObserver);
  66 };
  67
  68 }  // namespace syncer
  69
  70 #endif  // SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_