content/browser/indexed_db/indexed_db_dispatcher_host.h

   1 // Copyright (c) 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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
   6 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/id_map.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "content/browser/fileapi/chrome_blob_storage_context.h"
  16 #include "content/public/browser/browser_message_filter.h"
  17 #include "net/url_request/url_request_context_getter.h"
  18 #include "url/gurl.h"
  19 #include "webkit/browser/blob/blob_data_handle.h"
  20
  21 struct IndexedDBDatabaseMetadata;
  22 struct IndexedDBHostMsg_DatabaseCount_Params;
  23 struct IndexedDBHostMsg_DatabaseCreateIndex_Params;
  24 struct IndexedDBHostMsg_DatabaseCreateObjectStore_Params;
  25 struct IndexedDBHostMsg_DatabaseCreateTransaction_Params;
  26 struct IndexedDBHostMsg_DatabaseDeleteRange_Params;
  27 struct IndexedDBHostMsg_DatabaseGet_Params;
  28 struct IndexedDBHostMsg_DatabaseOpenCursor_Params;
  29 struct IndexedDBHostMsg_DatabasePut_Params;
  30 struct IndexedDBHostMsg_DatabaseSetIndexKeys_Params;
  31 struct IndexedDBHostMsg_FactoryDeleteDatabase_Params;
  32 struct IndexedDBHostMsg_FactoryGetDatabaseNames_Params;
  33 struct IndexedDBHostMsg_FactoryOpen_Params;
  34
  35 namespace content {
  36 class IndexedDBConnection;
  37 class IndexedDBContextImpl;
  38 class IndexedDBCursor;
  39 class IndexedDBKey;
  40 class IndexedDBKeyPath;
  41 class IndexedDBKeyRange;
  42 struct IndexedDBDatabaseMetadata;
  43
  44 // Handles all IndexedDB related messages from a particular renderer process.
  45 class IndexedDBDispatcherHost : public BrowserMessageFilter {
  46  public:
  47   // Only call the constructor from the UI thread.
  48   IndexedDBDispatcherHost(int ipc_process_id,
  49                           net::URLRequestContextGetter* request_context_getter,
  50                           IndexedDBContextImpl* indexed_db_context,
  51                           ChromeBlobStorageContext* blob_storage_context);
  52   IndexedDBDispatcherHost(int ipc_process_id,
  53                           net::URLRequestContext* request_context,
  54                           IndexedDBContextImpl* indexed_db_context,
  55                           ChromeBlobStorageContext* blob_storage_context);
  56
  57   static ::IndexedDBDatabaseMetadata ConvertMetadata(
  58       const content::IndexedDBDatabaseMetadata& metadata);
  59
  60   // BrowserMessageFilter implementation.
  61   virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
  62   virtual void OnChannelClosing() OVERRIDE;
  63   virtual void OnDestruct() const OVERRIDE;
  64   virtual base::TaskRunner* OverrideTaskRunnerForMessage(
  65       const IPC::Message& message) OVERRIDE;
  66   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  67
  68   void FinishTransaction(int64 host_transaction_id, bool committed);
  69
  70   // A shortcut for accessing our context.
  71   IndexedDBContextImpl* Context() { return indexed_db_context_.get(); }
  72   storage::BlobStorageContext* blob_storage_context() const {
  73     return blob_storage_context_->context();
  74   }
  75
  76   // IndexedDBCallbacks call these methods to add the results into the
  77   // applicable map.  See below for more details.
  78   int32 Add(IndexedDBCursor* cursor);
  79   int32 Add(IndexedDBConnection* connection,
  80             int32 ipc_thread_id,
  81             const GURL& origin_url);
  82
  83   void RegisterTransactionId(int64 host_transaction_id, const GURL& origin_url);
  84
  85   IndexedDBCursor* GetCursorFromId(int32 ipc_cursor_id);
  86
  87   // These are called to map a 32-bit front-end (renderer-specific) transaction
  88   // id to and from a back-end ("host") transaction id that encodes the process
  89   // id in the high 32 bits. The mapping is host-specific and ids are validated.
  90   int64 HostTransactionId(int64 transaction_id);
  91   int64 RendererTransactionId(int64 host_transaction_id);
  92
  93   // These are called to decode a host transaction ID, for diagnostic purposes.
  94   static uint32 TransactionIdToRendererTransactionId(int64 host_transaction_id);
  95   static uint32 TransactionIdToProcessId(int64 host_transaction_id);
  96
  97   void HoldBlobDataHandle(const std::string& uuid,
  98                           scoped_ptr<storage::BlobDataHandle> blob_data_handle);
  99   void DropBlobDataHandle(const std::string& uuid);
 100
 101  private:
 102   // Friends to enable OnDestruct() delegation.
 103   friend class BrowserThread;
 104   friend class base::DeleteHelper<IndexedDBDispatcherHost>;
 105
 106   // Used in nested classes.
 107   typedef std::map<std::string, storage::BlobDataHandle*> BlobDataHandleMap;
 108   typedef std::map<int64, int64> TransactionIDToDatabaseIDMap;
 109   typedef std::map<int64, uint64> TransactionIDToSizeMap;
 110   typedef std::map<int64, GURL> TransactionIDToURLMap;
 111   typedef std::map<int32, GURL> WebIDBObjectIDToURLMap;
 112
 113   // IDMap for RefCounted types
 114   template <typename RefCountedType>
 115   class RefIDMap {
 116    public:
 117     typedef int32 KeyType;
 118
 119     RefIDMap() {}
 120     ~RefIDMap() {}
 121
 122     KeyType Add(RefCountedType* data) {
 123       return map_.Add(new scoped_refptr<RefCountedType>(data));
 124     }
 125
 126     RefCountedType* Lookup(KeyType id) {
 127       scoped_refptr<RefCountedType>* ptr = map_.Lookup(id);
 128       if (ptr == NULL)
 129         return NULL;
 130       return ptr->get();
 131     }
 132
 133     void Remove(KeyType id) { map_.Remove(id); }
 134
 135     void set_check_on_null_data(bool value) {
 136       map_.set_check_on_null_data(value);
 137     }
 138
 139    private:
 140     IDMap<scoped_refptr<RefCountedType>, IDMapOwnPointer> map_;
 141
 142     DISALLOW_COPY_AND_ASSIGN(RefIDMap);
 143   };
 144
 145   class DatabaseDispatcherHost {
 146    public:
 147     explicit DatabaseDispatcherHost(IndexedDBDispatcherHost* parent);
 148     ~DatabaseDispatcherHost();
 149
 150     void CloseAll();
 151     bool OnMessageReceived(const IPC::Message& message);
 152
 153     void OnCreateObjectStore(
 154         const IndexedDBHostMsg_DatabaseCreateObjectStore_Params& params);
 155     void OnDeleteObjectStore(int32 ipc_database_id,
 156                              int64 transaction_id,
 157                              int64 object_store_id);
 158     void OnCreateTransaction(
 159         const IndexedDBHostMsg_DatabaseCreateTransaction_Params&);
 160     void OnClose(int32 ipc_database_id);
 161     void OnVersionChangeIgnored(int32 ipc_database_id);
 162     void OnDestroyed(int32 ipc_database_id);
 163
 164     void OnGet(const IndexedDBHostMsg_DatabaseGet_Params& params);
 165     // OnPutWrapper starts on the IO thread so that it can grab BlobDataHandles
 166     // before posting to the IDB TaskRunner for the rest of the job.
 167     void OnPutWrapper(const IndexedDBHostMsg_DatabasePut_Params& params);
 168     void OnPut(const IndexedDBHostMsg_DatabasePut_Params& params,
 169                std::vector<storage::BlobDataHandle*> handles);
 170     void OnSetIndexKeys(
 171         const IndexedDBHostMsg_DatabaseSetIndexKeys_Params& params);
 172     void OnSetIndexesReady(int32 ipc_database_id,
 173                            int64 transaction_id,
 174                            int64 object_store_id,
 175                            const std::vector<int64>& ids);
 176     void OnOpenCursor(const IndexedDBHostMsg_DatabaseOpenCursor_Params& params);
 177     void OnCount(const IndexedDBHostMsg_DatabaseCount_Params& params);
 178     void OnDeleteRange(
 179         const IndexedDBHostMsg_DatabaseDeleteRange_Params& params);
 180     void OnClear(int32 ipc_thread_id,
 181                  int32 ipc_callbacks_id,
 182                  int32 ipc_database_id,
 183                  int64 transaction_id,
 184                  int64 object_store_id);
 185     void OnCreateIndex(
 186         const IndexedDBHostMsg_DatabaseCreateIndex_Params& params);
 187     void OnDeleteIndex(int32 ipc_database_id,
 188                        int64 transaction_id,
 189                        int64 object_store_id,
 190                        int64 index_id);
 191
 192     void OnAbort(int32 ipc_database_id, int64 transaction_id);
 193     void OnCommit(int32 ipc_database_id, int64 transaction_id);
 194     IndexedDBDispatcherHost* parent_;
 195     IDMap<IndexedDBConnection, IDMapOwnPointer> map_;
 196     WebIDBObjectIDToURLMap database_url_map_;
 197     TransactionIDToSizeMap transaction_size_map_;
 198     TransactionIDToURLMap transaction_url_map_;
 199     TransactionIDToDatabaseIDMap transaction_database_map_;
 200
 201    private:
 202     DISALLOW_COPY_AND_ASSIGN(DatabaseDispatcherHost);
 203   };
 204
 205   class CursorDispatcherHost {
 206    public:
 207     explicit CursorDispatcherHost(IndexedDBDispatcherHost* parent);
 208     ~CursorDispatcherHost();
 209
 210     bool OnMessageReceived(const IPC::Message& message);
 211
 212     void OnAdvance(int32 ipc_object_store_id,
 213                    int32 ipc_thread_id,
 214                    int32 ipc_callbacks_id,
 215                    uint32 count);
 216     void OnContinue(int32 ipc_object_store_id,
 217                     int32 ipc_thread_id,
 218                     int32 ipc_callbacks_id,
 219                     const IndexedDBKey& key,
 220                     const IndexedDBKey& primary_key);
 221     void OnPrefetch(int32 ipc_cursor_id,
 222                     int32 ipc_thread_id,
 223                     int32 ipc_callbacks_id,
 224                     int n);
 225     void OnPrefetchReset(int32 ipc_cursor_id,
 226                          int used_prefetches,
 227                          int unused_prefetches);
 228     void OnDestroyed(int32 ipc_cursor_id);
 229
 230     IndexedDBDispatcherHost* parent_;
 231     RefIDMap<IndexedDBCursor> map_;
 232
 233    private:
 234     DISALLOW_COPY_AND_ASSIGN(CursorDispatcherHost);
 235   };
 236
 237   virtual ~IndexedDBDispatcherHost();
 238
 239   // Helper templates.
 240   template <class ReturnType>
 241   ReturnType* GetOrTerminateProcess(IDMap<ReturnType, IDMapOwnPointer>* map,
 242                                     int32 ipc_return_object_id);
 243   template <class ReturnType>
 244   ReturnType* GetOrTerminateProcess(RefIDMap<ReturnType>* map,
 245                                     int32 ipc_return_object_id);
 246
 247   template <typename MapType>
 248   void DestroyObject(MapType* map, int32 ipc_object_id);
 249
 250   // Message processing. Most of the work is delegated to the dispatcher hosts
 251   // below.
 252   void OnIDBFactoryGetDatabaseNames(
 253       const IndexedDBHostMsg_FactoryGetDatabaseNames_Params& p);
 254   void OnIDBFactoryOpen(const IndexedDBHostMsg_FactoryOpen_Params& p);
 255
 256   void OnIDBFactoryDeleteDatabase(
 257       const IndexedDBHostMsg_FactoryDeleteDatabase_Params& p);
 258
 259   void OnAckReceivedBlobs(const std::vector<std::string>& uuids);
 260   void OnPutHelper(const IndexedDBHostMsg_DatabasePut_Params& params,
 261                    std::vector<storage::BlobDataHandle*> handles);
 262
 263   void ResetDispatcherHosts();
 264
 265   // The getter holds the context until OnChannelConnected() can be called from
 266   // the IO thread, which will extract the net::URLRequestContext from it.
 267   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
 268   net::URLRequestContext* request_context_;
 269   scoped_refptr<IndexedDBContextImpl> indexed_db_context_;
 270   scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
 271
 272   BlobDataHandleMap blob_data_handle_map_;
 273
 274   // Only access on IndexedDB thread.
 275   scoped_ptr<DatabaseDispatcherHost> database_dispatcher_host_;
 276   scoped_ptr<CursorDispatcherHost> cursor_dispatcher_host_;
 277
 278   // Used to set file permissions for blob storage.
 279   int ipc_process_id_;
 280
 281   DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBDispatcherHost);
 282 };
 283
 284 }  // namespace content
 285
 286 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_