IDBObserver: Lifetime Management: Adding Observer

content/browser/indexed_db/indexed_db_database.cc

 // Copyright (c) 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/browser/indexed_db/indexed_db_database.h"
 
 #include <math.h>
 
 #include <limits>
 #include <memory>
@@ skipping 11 matching lines @@
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/indexed_db/indexed_db_blob_info.h"
 #include "content/browser/indexed_db/indexed_db_class_factory.h"
 #include "content/browser/indexed_db/indexed_db_connection.h"
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 #include "content/browser/indexed_db/indexed_db_cursor.h"
 #include "content/browser/indexed_db/indexed_db_factory.h"
 #include "content/browser/indexed_db/indexed_db_index_writer.h"
+#include "content/browser/indexed_db/indexed_db_observer.h"
 #include "content/browser/indexed_db/indexed_db_pending_connection.h"
 #include "content/browser/indexed_db/indexed_db_return_value.h"
 #include "content/browser/indexed_db/indexed_db_tracing.h"
 #include "content/browser/indexed_db/indexed_db_transaction.h"
 #include "content/browser/indexed_db/indexed_db_value.h"
 #include "content/common/indexed_db/indexed_db_constants.h"
 #include "content/common/indexed_db/indexed_db_key_path.h"
 #include "content/common/indexed_db/indexed_db_key_range.h"
 #include "content/public/common/content_switches.h"
 #include "storage/browser/blob/blob_data_handle.h"
@@ skipping 492 matching lines @@
 void IndexedDBDatabase::Abort(int64_t transaction_id,
                               const IndexedDBDatabaseError& error) {
   IDB_TRACE1("IndexedDBDatabase::Abort(error)", "txn.id", transaction_id);
   // If the transaction is unknown, then it has already been aborted by the
   // backend before this call so it is safe to ignore it.
   IndexedDBTransaction* transaction = GetTransaction(transaction_id);
   if (transaction)
     transaction->Abort(error);
 }
 
+void IndexedDBDatabase::Observe(int64_t transaction_id, int64_t observer_id) {
+  IndexedDBTransaction* transaction = GetTransaction(transaction_id);
+  if (!transaction)
+    return;
+  transaction->AddPendingObserver(observer_id,
+                                  new IndexedDBObserver(observer_id));
+}
+
+void IndexedDBDatabase::Unobserve(std::vector<int64_t> observersToRemove) {
+  // TODO (palakj): Remove observer from pending_observer queue of transactions
+  typedef std::map<int64_t, IndexedDBObserver*>::iterator Iterator;
+  for (uint32_t i = 0; i < observersToRemove.size(); i++) {
+    Iterator obs = active_observers_.find(observersToRemove[i]);

[dmurph, 2016/06/17 09:05:06]

replace these with active_observers_.erase(observersToRemove[i]);

[palakj1, 2016/06/18 05:13:40]

Done

+    active_observers_.erase(obs);
+  }
+}
+
 void IndexedDBDatabase::GetAll(int64_t transaction_id,
                                int64_t object_store_id,
                                int64_t index_id,
                                std::unique_ptr<IndexedDBKeyRange> key_range,
                                bool key_only,
                                int64_t max_count,
                                scoped_refptr<IndexedDBCallbacks> callbacks) {
   IDB_TRACE1("IndexedDBDatabase::GetAll", "txn.id", transaction_id);
   IndexedDBTransaction* transaction = GetTransaction(transaction_id);
   if (!transaction)
@@ skipping 1396 matching lines @@
 
 void IndexedDBDatabase::VersionChangeAbortOperation(
     int64_t previous_version,
     IndexedDBTransaction* transaction) {
   DCHECK(!transaction);
   IDB_TRACE("IndexedDBDatabase::VersionChangeAbortOperation");
   metadata_.version = previous_version;
 }
 
 }  // namespace content