chrome/browser/sync_file_system/local/canned_syncable_file_system.h

   1 // Copyright 2013 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 CHROME_BROWSER_SYNC_FILE_SYSTEM_LOCAL_CANNED_SYNCABLE_FILE_SYSTEM_H_
   6 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_LOCAL_CANNED_SYNCABLE_FILE_SYSTEM_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/callback_forward.h"
  12 #include "base/files/file.h"
  13 #include "base/files/scoped_temp_dir.h"
  14 #include "base/observer_list_threadsafe.h"
  15 #include "chrome/browser/sync_file_system/local/local_file_sync_status.h"
  16 #include "chrome/browser/sync_file_system/sync_status_code.h"
  17 #include "storage/browser/blob/blob_data_handle.h"
  18 #include "storage/browser/fileapi/file_system_operation.h"
  19 #include "storage/browser/fileapi/file_system_url.h"
  20 #include "storage/browser/quota/quota_callbacks.h"
  21 #include "storage/common/fileapi/file_system_types.h"
  22 #include "storage/common/fileapi/file_system_util.h"
  23 #include "storage/common/quota/quota_types.h"
  24
  25 namespace base {
  26 class SingleThreadTaskRunner;
  27 class Thread;
  28 }
  29
  30 namespace storage {
  31 class FileSystemContext;
  32 class FileSystemOperationRunner;
  33 class FileSystemURL;
  34 }
  35
  36 namespace leveldb {
  37 class Env;
  38 }
  39
  40 namespace net {
  41 class URLRequestContext;
  42 }
  43
  44 namespace storage {
  45 class QuotaManager;
  46 }
  47
  48 namespace sync_file_system {
  49
  50 class FileChangeList;
  51 class LocalFileSyncContext;
  52 class SyncFileSystemBackend;
  53
  54 // A canned syncable filesystem for testing.
  55 // This internally creates its own QuotaManager and FileSystemContext
  56 // (as we do so for each isolated application).
  57 class CannedSyncableFileSystem
  58     : public LocalFileSyncStatus::Observer {
  59  public:
  60   typedef base::Callback<void(const GURL& root,
  61                               const std::string& name,
  62                               base::File::Error result)>
  63       OpenFileSystemCallback;
  64   typedef base::Callback<void(base::File::Error)> StatusCallback;
  65   typedef base::Callback<void(int64)> WriteCallback;
  66   typedef storage::FileSystemOperation::FileEntryList FileEntryList;
  67
  68   enum QuotaMode {
  69     QUOTA_ENABLED,
  70     QUOTA_DISABLED,
  71   };
  72
  73   CannedSyncableFileSystem(
  74       const GURL& origin,
  75       leveldb::Env* env_override,
  76       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
  77       const scoped_refptr<base::SingleThreadTaskRunner>& file_task_runner);
  78   ~CannedSyncableFileSystem() override;
  79
  80   // SetUp must be called before using this instance.
  81   void SetUp(QuotaMode quota_mode);
  82
  83   // TearDown must be called before destructing this instance.
  84   void TearDown();
  85
  86   // Creates a FileSystemURL for the given (utf8) path string.
  87   storage::FileSystemURL URL(const std::string& path) const;
  88
  89   // Initialize this with given |sync_context| if it hasn't
  90   // been initialized.
  91   sync_file_system::SyncStatusCode MaybeInitializeFileSystemContext(
  92       LocalFileSyncContext* sync_context);
  93
  94   // Opens a new syncable file system.
  95   base::File::Error OpenFileSystem();
  96
  97   // Register sync status observers. Unlike original
  98   // LocalFileSyncStatus::Observer implementation the observer methods
  99   // are called on the same thread where AddSyncStatusObserver were called.
 100   void AddSyncStatusObserver(LocalFileSyncStatus::Observer* observer);
 101   void RemoveSyncStatusObserver(LocalFileSyncStatus::Observer* observer);
 102
 103   // Accessors.
 104   storage::FileSystemContext* file_system_context() {
 105     return file_system_context_.get();
 106   }
 107   storage::QuotaManager* quota_manager() { return quota_manager_.get(); }
 108   GURL origin() const { return origin_; }
 109   storage::FileSystemType type() const { return type_; }
 110   storage::StorageType storage_type() const {
 111     return FileSystemTypeToQuotaStorageType(type_);
 112   }
 113
 114   // Helper routines to perform file system operations.
 115   // OpenFileSystem() must have been called before calling any of them.
 116   // They create an operation and run it on IO task runner, and the operation
 117   // posts a task on file runner.
 118   base::File::Error CreateDirectory(const storage::FileSystemURL& url);
 119   base::File::Error CreateFile(const storage::FileSystemURL& url);
 120   base::File::Error Copy(const storage::FileSystemURL& src_url,
 121                          const storage::FileSystemURL& dest_url);
 122   base::File::Error Move(const storage::FileSystemURL& src_url,
 123                          const storage::FileSystemURL& dest_url);
 124   base::File::Error TruncateFile(const storage::FileSystemURL& url, int64 size);
 125   base::File::Error TouchFile(const storage::FileSystemURL& url,
 126                               const base::Time& last_access_time,
 127                               const base::Time& last_modified_time);
 128   base::File::Error Remove(const storage::FileSystemURL& url, bool recursive);
 129   base::File::Error FileExists(const storage::FileSystemURL& url);
 130   base::File::Error DirectoryExists(const storage::FileSystemURL& url);
 131   base::File::Error VerifyFile(const storage::FileSystemURL& url,
 132                                const std::string& expected_data);
 133   base::File::Error GetMetadataAndPlatformPath(
 134       const storage::FileSystemURL& url,
 135       base::File::Info* info,
 136       base::FilePath* platform_path);
 137   base::File::Error ReadDirectory(const storage::FileSystemURL& url,
 138                                   FileEntryList* entries);
 139
 140   // Returns the # of bytes written (>=0) or an error code (<0).
 141   int64 Write(net::URLRequestContext* url_request_context,
 142               const storage::FileSystemURL& url,
 143               scoped_ptr<storage::BlobDataHandle> blob_data_handle);
 144   int64 WriteString(const storage::FileSystemURL& url, const std::string& data);
 145
 146   // Purges the file system local storage.
 147   base::File::Error DeleteFileSystem();
 148
 149   // Retrieves the quota and usage.
 150   storage::QuotaStatusCode GetUsageAndQuota(int64* usage, int64* quota);
 151
 152   // ChangeTracker related methods. They run on file task runner.
 153   void GetChangedURLsInTracker(storage::FileSystemURLSet* urls);
 154   void ClearChangeForURLInTracker(const storage::FileSystemURL& url);
 155   void GetChangesForURLInTracker(const storage::FileSystemURL& url,
 156                                  FileChangeList* changes);
 157
 158   SyncFileSystemBackend* backend();
 159   storage::FileSystemOperationRunner* operation_runner();
 160
 161   // LocalFileSyncStatus::Observer overrides.
 162   void OnSyncEnabled(const storage::FileSystemURL& url) override;
 163   void OnWriteEnabled(const storage::FileSystemURL& url) override;
 164
 165   // Operation methods body.
 166   // They can be also called directly if the caller is already on IO thread.
 167   void DoOpenFileSystem(const OpenFileSystemCallback& callback);
 168   void DoCreateDirectory(const storage::FileSystemURL& url,
 169                          const StatusCallback& callback);
 170   void DoCreateFile(const storage::FileSystemURL& url,
 171                     const StatusCallback& callback);
 172   void DoCopy(const storage::FileSystemURL& src_url,
 173               const storage::FileSystemURL& dest_url,
 174               const StatusCallback& callback);
 175   void DoMove(const storage::FileSystemURL& src_url,
 176               const storage::FileSystemURL& dest_url,
 177               const StatusCallback& callback);
 178   void DoTruncateFile(const storage::FileSystemURL& url,
 179                       int64 size,
 180                       const StatusCallback& callback);
 181   void DoTouchFile(const storage::FileSystemURL& url,
 182                    const base::Time& last_access_time,
 183                    const base::Time& last_modified_time,
 184                    const StatusCallback& callback);
 185   void DoRemove(const storage::FileSystemURL& url,
 186                 bool recursive,
 187                 const StatusCallback& callback);
 188   void DoFileExists(const storage::FileSystemURL& url,
 189                     const StatusCallback& callback);
 190   void DoDirectoryExists(const storage::FileSystemURL& url,
 191                          const StatusCallback& callback);
 192   void DoVerifyFile(const storage::FileSystemURL& url,
 193                     const std::string& expected_data,
 194                     const StatusCallback& callback);
 195   void DoGetMetadataAndPlatformPath(const storage::FileSystemURL& url,
 196                                     base::File::Info* info,
 197                                     base::FilePath* platform_path,
 198                                     const StatusCallback& callback);
 199   void DoReadDirectory(const storage::FileSystemURL& url,
 200                        FileEntryList* entries,
 201                        const StatusCallback& callback);
 202   void DoWrite(net::URLRequestContext* url_request_context,
 203                const storage::FileSystemURL& url,
 204                scoped_ptr<storage::BlobDataHandle> blob_data_handle,
 205                const WriteCallback& callback);
 206   void DoWriteString(const storage::FileSystemURL& url,
 207                      const std::string& data,
 208                      const WriteCallback& callback);
 209   void DoGetUsageAndQuota(int64* usage,
 210                           int64* quota,
 211                           const storage::StatusCallback& callback);
 212
 213  private:
 214   typedef base::ObserverListThreadSafe<LocalFileSyncStatus::Observer>
 215       ObserverList;
 216
 217   // Callbacks.
 218   void DidOpenFileSystem(base::SingleThreadTaskRunner* original_task_runner,
 219                          const base::Closure& quit_closure,
 220                          const GURL& root,
 221                          const std::string& name,
 222                          base::File::Error result);
 223   void DidInitializeFileSystemContext(const base::Closure& quit_closure,
 224                                       sync_file_system::SyncStatusCode status);
 225
 226   void InitializeSyncStatusObserver();
 227
 228   base::ScopedTempDir data_dir_;
 229   const std::string service_name_;
 230
 231   scoped_refptr<storage::QuotaManager> quota_manager_;
 232   scoped_refptr<storage::FileSystemContext> file_system_context_;
 233   const GURL origin_;
 234   const storage::FileSystemType type_;
 235   GURL root_url_;
 236   base::File::Error result_;
 237   sync_file_system::SyncStatusCode sync_status_;
 238
 239   leveldb::Env* env_override_;
 240   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 241   scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
 242
 243   // Boolean flags mainly for helping debug.
 244   bool is_filesystem_set_up_;
 245   bool is_filesystem_opened_;  // Should be accessed only on the IO thread.
 246
 247   scoped_refptr<ObserverList> sync_status_observers_;
 248
 249   DISALLOW_COPY_AND_ASSIGN(CannedSyncableFileSystem);
 250 };
 251
 252 }  // namespace sync_file_system
 253
 254 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_LOCAL_CANNED_SYNCABLE_FILE_SYSTEM_H_