IDBObserver: Lifetime Management: Adding Observer

content/child/indexed_db/indexed_db_dispatcher.cc

 // 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.
 
 #include "content/child/indexed_db/indexed_db_dispatcher.h"
 
 #include <utility>
 
 #include "base/format_macros.h"
 #include "base/lazy_instance.h"
@@ skipping 150 matching lines @@
   // If a message gets here, IndexedDBMessageFilter already determined that it
   // is an IndexedDB message.
   DCHECK(handled) << "Didn't handle a message defined at line "
                   << IPC_MESSAGE_ID_LINE(msg.type());
 }
 
 bool IndexedDBDispatcher::Send(IPC::Message* msg) {
   return thread_safe_sender_->Send(msg);
 }
 
-void IndexedDBDispatcher::AddIDBObserver(int32_t ipc_database_id,
-                                         int64_t transaction_id,
-                                         blink::IDBObserver* observer) {
-  int64_t observer_id = maxObserverId++;
-  observers_[observer_id] = observer;
-  // params.ipc_thread_id = CurrentWorkerId();
-  // params.ipc_database_id = ipc_database_id;
-  // params.transaction_id = transaction_id;
-  // params.observer_id = observer_id;
+int32_t IndexedDBDispatcher::AddIDBObserver(int32_t ipc_database_id,
+                                            int64_t transaction_id,
+                                            blink::IDBObserver* observer) {
+  // TODO(palakj): generate id through IDMap here.
+  int32_t observer_id = 0;
   Send(new IndexedDBHostMsg_DatabaseObserve(
     CurrentWorkerId(),
     ipc_database_id,
     transaction_id,
     observer_id));
+  return observer_id;
+}
+
+std::vector<int32_t> IndexedDBDispatcher::RemoveIDBObserver(
+    int32_t ipc_database_id,
+    blink::IDBObserver* observer) {
+  std::vector<int32_t> remove_observers;
+  // TODO(palakj): iterate over map to find observer and collect id's in
+  // remove_observers
+
+  Send(new IndexedDBHostMsg_DatabaseUnobserve(
+      CurrentWorkerId(), ipc_database_id, remove_observers));
+  return remove_observers;
 }
 
 void IndexedDBDispatcher::RequestIDBCursorAdvance(
     unsigned long count,
     WebIDBCallbacks* callbacks_ptr,
     int32_t ipc_cursor_id,
     int64_t transaction_id) {
   // Reset all cursor prefetch caches except for this cursor.
   ResetCursorPrefetchCaches(transaction_id, ipc_cursor_id);
 
@@ skipping 622 matching lines @@
   typedef std::map<int32_t, WebIDBCursorImpl*>::iterator Iterator;
   for (Iterator i = cursors_.begin(); i != cursors_.end(); ++i) {
     if (i->first == ipc_exception_cursor_id ||
         i->second->transaction_id() != transaction_id)
       continue;
     i->second->ResetPrefetchCache();
   }
 }
 
 }  // namespace content