Split IndexedDBFactory into virtual base + impl.

content/browser/indexed_db/indexed_db_factory_impl.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_factory.h"
+#include "content/browser/indexed_db/indexed_db_factory_impl.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "content/browser/indexed_db/indexed_db_backing_store.h"
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 #include "content/browser/indexed_db/indexed_db_database_error.h"
 #include "content/browser/indexed_db/indexed_db_tracing.h"
 #include "content/browser/indexed_db/indexed_db_transaction_coordinator.h"
 #include "third_party/WebKit/public/platform/WebIDBDatabaseException.h"
 #include "third_party/leveldatabase/env_chromium.h"
 #include "webkit/common/database/database_identifier.h"
 
 using base::ASCIIToUTF16;
 
 namespace content {
 
 const int64 kBackingStoreGracePeriodMs = 2000;
 
-IndexedDBFactory::IndexedDBFactory(IndexedDBContextImpl* context)
-    : context_(context) {}
+IndexedDBFactoryImpl::IndexedDBFactoryImpl(IndexedDBContextImpl* context)
+    : context_(context) {
+}
 
-IndexedDBFactory::~IndexedDBFactory() {}
+IndexedDBFactoryImpl::~IndexedDBFactoryImpl() {
+}
 
-void IndexedDBFactory::RemoveDatabaseFromMaps(
+void IndexedDBFactoryImpl::RemoveDatabaseFromMaps(
     const IndexedDBDatabase::Identifier& identifier) {
   IndexedDBDatabaseMap::iterator it = database_map_.find(identifier);
   DCHECK(it != database_map_.end());
   IndexedDBDatabase* database = it->second;
   database_map_.erase(it);
 
   std::pair<OriginDBMap::iterator, OriginDBMap::iterator> range =
       origin_dbs_.equal_range(database->identifier().first);
   DCHECK(range.first != range.second);
   for (OriginDBMap::iterator it2 = range.first; it2 != range.second; ++it2) {
     if (it2->second == database) {
       origin_dbs_.erase(it2);
       break;
     }
   }
 }
 
-void IndexedDBFactory::ReleaseDatabase(
+void IndexedDBFactoryImpl::ReleaseDatabase(
     const IndexedDBDatabase::Identifier& identifier,
     bool forcedClose) {
-
   DCHECK(!database_map_.find(identifier)->second->backing_store());
 
   RemoveDatabaseFromMaps(identifier);
 
   // No grace period on a forced-close, as the initiator is
   // assuming the backing store will be released once all
   // connections are closed.
   ReleaseBackingStore(identifier.first, forcedClose);
 }
 
-void IndexedDBFactory::ReleaseBackingStore(const GURL& origin_url,
-                                           bool immediate) {
+void IndexedDBFactoryImpl::ReleaseBackingStore(const GURL& origin_url,
+                                               bool immediate) {
   if (immediate) {
     IndexedDBBackingStoreMap::iterator it =
         backing_stores_with_active_blobs_.find(origin_url);
     if (it != backing_stores_with_active_blobs_.end()) {
       it->second->active_blob_registry()->ForceShutdown();
       backing_stores_with_active_blobs_.erase(it);
     }
   }
 
   // Only close if this is the last reference.
   if (!HasLastBackingStoreReference(origin_url))
     return;
 
   // If this factory does hold the last reference to the backing store, it can
   // be closed - but unless requested to close it immediately, keep it around
   // for a short period so that a re-open is fast.
   if (immediate) {
     CloseBackingStore(origin_url);
     return;
   }
 
   // Start a timer to close the backing store, unless something else opens it
   // in the mean time.
   DCHECK(!backing_store_map_[origin_url]->close_timer()->IsRunning());
   backing_store_map_[origin_url]->close_timer()->Start(
       FROM_HERE,
       base::TimeDelta::FromMilliseconds(kBackingStoreGracePeriodMs),
-      base::Bind(&IndexedDBFactory::MaybeCloseBackingStore, this, origin_url));
+      base::Bind(
+          &IndexedDBFactoryImpl::MaybeCloseBackingStore, this, origin_url));
 }
 
-void IndexedDBFactory::MaybeCloseBackingStore(const GURL& origin_url) {
+void IndexedDBFactoryImpl::MaybeCloseBackingStore(const GURL& origin_url) {
   // Another reference may have opened since the maybe-close was posted, so it
   // is necessary to check again.
   if (HasLastBackingStoreReference(origin_url))
     CloseBackingStore(origin_url);
 }
 
-void IndexedDBFactory::CloseBackingStore(const GURL& origin_url) {
+void IndexedDBFactoryImpl::CloseBackingStore(const GURL& origin_url) {
   IndexedDBBackingStoreMap::iterator it = backing_store_map_.find(origin_url);
   DCHECK(it != backing_store_map_.end());
   // Stop the timer (if it's running) - this may happen if the timer was started
   // and then a forced close occurs.
   it->second->close_timer()->Stop();
   backing_store_map_.erase(it);
 }
 
-bool IndexedDBFactory::HasLastBackingStoreReference(const GURL& origin_url)
-    const {
+bool IndexedDBFactoryImpl::HasLastBackingStoreReference(
+    const GURL& origin_url) const {
   IndexedDBBackingStore* ptr;
   {
     // Scope so that the implicit scoped_refptr<> is freed.
     IndexedDBBackingStoreMap::const_iterator it =
         backing_store_map_.find(origin_url);
     DCHECK(it != backing_store_map_.end());
     ptr = it->second.get();
   }
   return ptr->HasOneRef();
 }
 
-void IndexedDBFactory::ForceClose(const GURL& origin_url) {
+void IndexedDBFactoryImpl::ForceClose(const GURL& origin_url) {
   std::pair<OriginDBMapIterator, OriginDBMapIterator> range =
       GetOpenDatabasesForOrigin(origin_url);
 
   while (range.first != range.second) {
     IndexedDBDatabase* db = range.first->second;
     ++range.first;
     db->ForceClose();
   }
 
   if (backing_store_map_.find(origin_url) != backing_store_map_.end())
     ReleaseBackingStore(origin_url, true /* immediate */);
 }
 
-void IndexedDBFactory::ContextDestroyed() {
+void IndexedDBFactoryImpl::ContextDestroyed() {
   // Timers on backing stores hold a reference to this factory. When the
   // context (which nominally owns this factory) is destroyed during thread
   // termination the timers must be stopped so that this factory and the
   // stores can be disposed of.
   for (IndexedDBBackingStoreMap::iterator it = backing_store_map_.begin();
        it != backing_store_map_.end();
        ++it)
     it->second->close_timer()->Stop();
   backing_store_map_.clear();
   backing_stores_with_active_blobs_.clear();
   context_ = NULL;
 }
 
-void IndexedDBFactory::ReportOutstandingBlobs(const GURL& origin_url,
-                                              bool blobs_outstanding) {
+void IndexedDBFactoryImpl::ReportOutstandingBlobs(const GURL& origin_url,
+                                                  bool blobs_outstanding) {
   if (!context_)
     return;
   if (blobs_outstanding) {
     DCHECK(!backing_stores_with_active_blobs_.count(origin_url));
     IndexedDBBackingStoreMap::iterator it = backing_store_map_.find(origin_url);
     if (it != backing_store_map_.end())
       backing_stores_with_active_blobs_.insert(*it);
     else
       DCHECK(false);
   } else {
     IndexedDBBackingStoreMap::iterator it =
         backing_stores_with_active_blobs_.find(origin_url);
     if (it != backing_stores_with_active_blobs_.end()) {
       backing_stores_with_active_blobs_.erase(it);
       ReleaseBackingStore(origin_url, false /* immediate */);
     }
   }
 }
 
-void IndexedDBFactory::GetDatabaseNames(
+void IndexedDBFactoryImpl::GetDatabaseNames(
     scoped_refptr<IndexedDBCallbacks> callbacks,
     const GURL& origin_url,
     const base::FilePath& data_directory,
     net::URLRequestContext* request_context) {
-  IDB_TRACE("IndexedDBFactory::GetDatabaseNames");
+  IDB_TRACE("IndexedDBFactoryImpl::GetDatabaseNames");
   // TODO(dgrogan): Plumb data_loss back to script eventually?
   blink::WebIDBDataLoss data_loss;
   std::string data_loss_message;
   bool disk_full;
   leveldb::Status s;
   // TODO(cmumford): Handle this error
   scoped_refptr<IndexedDBBackingStore> backing_store =
       OpenBackingStore(origin_url,
                        data_directory,
                        request_context,
@@ skipping 19 matching lines @@
     backing_store = NULL;
     if (s.IsCorruption())
       HandleBackingStoreCorruption(origin_url, error);
     return;
   }
   callbacks->OnSuccess(names);
   backing_store = NULL;
   ReleaseBackingStore(origin_url, false /* immediate */);
 }
 
-void IndexedDBFactory::DeleteDatabase(
+void IndexedDBFactoryImpl::DeleteDatabase(
     const base::string16& name,
     net::URLRequestContext* request_context,
     scoped_refptr<IndexedDBCallbacks> callbacks,
     const GURL& origin_url,
     const base::FilePath& data_directory) {
-  IDB_TRACE("IndexedDBFactory::DeleteDatabase");
+  IDB_TRACE("IndexedDBFactoryImpl::DeleteDatabase");
   IndexedDBDatabase::Identifier unique_identifier(origin_url, name);
   IndexedDBDatabaseMap::iterator it = database_map_.find(unique_identifier);
   if (it != database_map_.end()) {
     // If there are any connections to the database, directly delete the
     // database.
     it->second->DeleteDatabase(callbacks);
     return;
   }
 
   // TODO(dgrogan): Plumb data_loss back to script eventually?
@@ skipping 39 matching lines @@
 
   database_map_[unique_identifier] = database;
   origin_dbs_.insert(std::make_pair(origin_url, database));
   database->DeleteDatabase(callbacks);
   RemoveDatabaseFromMaps(unique_identifier);
   database = NULL;
   backing_store = NULL;
   ReleaseBackingStore(origin_url, false /* immediate */);
 }
 
-void IndexedDBFactory::DatabaseDeleted(
+void IndexedDBFactoryImpl::DatabaseDeleted(
     const IndexedDBDatabase::Identifier& identifier) {
   // NULL after ContextDestroyed() called, and in some unit tests.
   if (!context_)
     return;
   context_->DatabaseDeleted(identifier.first);
 }
 
-void IndexedDBFactory::HandleBackingStoreFailure(const GURL& origin_url) {
+void IndexedDBFactoryImpl::HandleBackingStoreFailure(const GURL& origin_url) {
   // NULL after ContextDestroyed() called, and in some unit tests.
   if (!context_)
     return;
   context_->ForceClose(origin_url,
                        IndexedDBContextImpl::FORCE_CLOSE_BACKING_STORE_FAILURE);
 }
 
-void IndexedDBFactory::HandleBackingStoreCorruption(
+void IndexedDBFactoryImpl::HandleBackingStoreCorruption(
     const GURL& origin_url,
     const IndexedDBDatabaseError& error) {
   // Make a copy of origin_url as this is likely a reference to a member of a
   // backing store which this function will be deleting.
   GURL saved_origin_url(origin_url);
   DCHECK(context_);
   base::FilePath path_base = context_->data_path();
   IndexedDBBackingStore::RecordCorruptionInfo(
       path_base, saved_origin_url, base::UTF16ToUTF8(error.message()));
   HandleBackingStoreFailure(saved_origin_url);
   // Note: DestroyBackingStore only deletes LevelDB files, leaving all others,
   //       so our corruption info file will remain.
   leveldb::Status s =
       IndexedDBBackingStore::DestroyBackingStore(path_base, saved_origin_url);
   if (!s.ok())
     DLOG(ERROR) << "Unable to delete backing store: " << s.ToString();
 }
 
-bool IndexedDBFactory::IsDatabaseOpen(const GURL& origin_url,
-                                      const base::string16& name) const {
+bool IndexedDBFactoryImpl::IsDatabaseOpen(const GURL& origin_url,
+                                          const base::string16& name) const {
   return !!database_map_.count(IndexedDBDatabase::Identifier(origin_url, name));
 }
 
-bool IndexedDBFactory::IsBackingStoreOpen(const GURL& origin_url) const {
+bool IndexedDBFactoryImpl::IsBackingStoreOpen(const GURL& origin_url) const {
   return backing_store_map_.find(origin_url) != backing_store_map_.end();
 }
 
-bool IndexedDBFactory::IsBackingStorePendingClose(const GURL& origin_url)
-    const {
+bool IndexedDBFactoryImpl::IsBackingStorePendingClose(
+    const GURL& origin_url) const {
   IndexedDBBackingStoreMap::const_iterator it =
       backing_store_map_.find(origin_url);
   if (it == backing_store_map_.end())
     return false;
   return it->second->close_timer()->IsRunning();
 }
 
-scoped_refptr<IndexedDBBackingStore> IndexedDBFactory::OpenBackingStoreHelper(
+scoped_refptr<IndexedDBBackingStore>
+IndexedDBFactoryImpl::OpenBackingStoreHelper(
     const GURL& origin_url,
     const base::FilePath& data_directory,
     net::URLRequestContext* request_context,
     blink::WebIDBDataLoss* data_loss,
     std::string* data_loss_message,
     bool* disk_full,
     bool first_time,
     leveldb::Status* status) {
   return IndexedDBBackingStore::Open(this,
                                      origin_url,
                                      data_directory,
                                      request_context,
                                      data_loss,
                                      data_loss_message,
                                      disk_full,
                                      context_->TaskRunner(),
                                      first_time,
                                      status);
 }
 
-scoped_refptr<IndexedDBBackingStore> IndexedDBFactory::OpenBackingStore(
+scoped_refptr<IndexedDBBackingStore> IndexedDBFactoryImpl::OpenBackingStore(
     const GURL& origin_url,
     const base::FilePath& data_directory,
     net::URLRequestContext* request_context,
     blink::WebIDBDataLoss* data_loss,
     std::string* data_loss_message,
     bool* disk_full,
     leveldb::Status* status) {
   const bool open_in_memory = data_directory.empty();
 
   IndexedDBBackingStoreMap::iterator it2 = backing_store_map_.find(origin_url);
@@ skipping 31 matching lines @@
     // All backing stores associated with this factory should be of the same
     // type.
     DCHECK_NE(session_only_backing_stores_.empty(), open_in_memory);
 
     return backing_store;
   }
 
   return 0;
 }
 
-void IndexedDBFactory::Open(const base::string16& name,
-                            const IndexedDBPendingConnection& connection,
-                            net::URLRequestContext* request_context,
-                            const GURL& origin_url,
-                            const base::FilePath& data_directory) {
-  IDB_TRACE("IndexedDBFactory::Open");
+void IndexedDBFactoryImpl::Open(const base::string16& name,
+                                const IndexedDBPendingConnection& connection,
+                                net::URLRequestContext* request_context,
+                                const GURL& origin_url,
+                                const base::FilePath& data_directory) {
+  IDB_TRACE("IndexedDBFactoryImpl::Open");
   scoped_refptr<IndexedDBDatabase> database;
   IndexedDBDatabase::Identifier unique_identifier(origin_url, name);
   IndexedDBDatabaseMap::iterator it = database_map_.find(unique_identifier);
   blink::WebIDBDataLoss data_loss =
       blink::WebIDBDataLossNone;
   std::string data_loss_message;
   bool disk_full = false;
   bool was_open = (it != database_map_.end());
   if (!was_open) {
     leveldb::Status s;
@@ skipping 49 matching lines @@
     connection.callbacks->OnDataLoss(data_loss, data_loss_message);
 
   database->OpenConnection(connection);
 
   if (!was_open && database->ConnectionCount() > 0) {
     database_map_[unique_identifier] = database;
     origin_dbs_.insert(std::make_pair(origin_url, database));
   }
 }
 
-std::pair<IndexedDBFactory::OriginDBMapIterator,
-          IndexedDBFactory::OriginDBMapIterator>
-IndexedDBFactory::GetOpenDatabasesForOrigin(const GURL& origin_url) const {
+std::pair<IndexedDBFactoryImpl::OriginDBMapIterator,
+          IndexedDBFactoryImpl::OriginDBMapIterator>
+IndexedDBFactoryImpl::GetOpenDatabasesForOrigin(const GURL& origin_url) const {
   return origin_dbs_.equal_range(origin_url);
 }
 
-size_t IndexedDBFactory::GetConnectionCount(const GURL& origin_url) const {
+size_t IndexedDBFactoryImpl::GetConnectionCount(const GURL& origin_url) const {
   size_t count(0);
 
   std::pair<OriginDBMapIterator, OriginDBMapIterator> range =
       GetOpenDatabasesForOrigin(origin_url);
   for (OriginDBMapIterator it = range.first; it != range.second; ++it)
     count += it->second->ConnectionCount();
 
   return count;
 }
 
 }  // namespace content