mojo leveldb: Get profile and leveldb connected to DOMStorageContext.

components/filesystem/file_system_app.cc

 // Copyright 2015 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 "components/filesystem/file_system_app.h"
 
-#include "base/command_line.h"
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
+#include "base/logging.h"
 #include "mojo/shell/public/cpp/connection.h"
 #include "mojo/shell/public/cpp/shell.h"
 
-#if defined(OS_WIN)
-#include "base/base_paths_win.h"
-#include "base/path_service.h"
-#include "base/strings/utf_string_conversions.h"
-#elif defined(OS_ANDROID)
-#include "base/base_paths_android.h"
-#include "base/path_service.h"
-#elif defined(OS_LINUX)
-#include "base/environment.h"
-#include "base/nix/xdg_util.h"
-#elif defined(OS_MACOSX)
-#include "base/base_paths_mac.h"
-#include "base/path_service.h"
-#endif
-
 namespace filesystem {
 
-namespace {
+scoped_ptr<mojo::ShellClient> CreateFileSystemApp(
+    const base::FilePath& persistent_dir) {
+  return make_scoped_ptr(new FileSystemApp(persistent_dir));
+}
 
-const char kUserDataDir[] = "user-data-dir";
-
-}  // namespace filesystem
-
-FileSystemApp::FileSystemApp()
-    : shell_(nullptr), lock_table_(new LockTable) {}
+FileSystemApp::FileSystemApp(const base::FilePath& persistent_dir)
+    : shell_(nullptr),
+      lock_table_(new LockTable),

[michaeln, 2016/02/26 21:59:24]

This only works if there's only one filesystem vending stuff within a given
directory or something else is ensuring there's no collisions between what
multiple instance are vending/locking within the same dir. Is that right?

[Elliot Glaysher, 2016/03/02 23:06:19]

Two points:

- The filesystem app was meant to be a singleton to all file access in mojo
code. It was replaced with the code I landed yesterday. (And in the
ProfileService which replaces this, it is a singleton for each profile
directory.)

- The lock table is a backup. We still perform OS file locking, however, on
posix, locking is advisory and we want to have the same Windows-y semantics
everywhere.

+      persistent_dir_(persistent_dir) {
+}
 
 FileSystemApp::~FileSystemApp() {}
 
 void FileSystemApp::Initialize(mojo::Shell* shell, const std::string& url,
                                uint32_t id, uint32_t user_id) {
   shell_ = shell;
   tracing_.Initialize(shell, url);
 }
 
 bool FileSystemApp::AcceptConnection(mojo::Connection* connection) {
   connection->AddInterface<FileSystem>(this);
   return true;
 }
 
 // |InterfaceFactory<Files>| implementation:
 void FileSystemApp::Create(mojo::Connection* connection,
                            mojo::InterfaceRequest<FileSystem> request) {
-  new FileSystemImpl(connection, std::move(request), GetUserDataDir(),
+  new FileSystemImpl(connection, std::move(request), persistent_dir_,
                      lock_table_.get());
 }
 
-//static
-base::FilePath FileSystemApp::GetUserDataDir() {
-  base::FilePath path;
-
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(kUserDataDir)) {
-    path = command_line->GetSwitchValuePath(kUserDataDir);
-  } else {
-#if defined(OS_WIN)
-    CHECK(PathService::Get(base::DIR_LOCAL_APP_DATA, &path));
-    path = path.Append(FILE_PATH_LITERAL("mandoline"));
-#elif defined(OS_LINUX)
-    scoped_ptr<base::Environment> env(base::Environment::Create());
-    base::FilePath config_dir(
-        base::nix::GetXDGDirectory(env.get(),
-                                   base::nix::kXdgConfigHomeEnvVar,
-                                   base::nix::kDotConfigDir));
-    path = config_dir.Append("mandoline");
-#elif defined(OS_MACOSX)
-    CHECK(PathService::Get(base::DIR_APP_DATA, &path));
-    path = path.Append("Mandoline Shell");
-#elif defined(OS_ANDROID)
-    CHECK(PathService::Get(base::DIR_ANDROID_APP_DATA, &path));
-    path = path.Append(FILE_PATH_LITERAL("mandoline"));
-#else
-    NOTIMPLEMENTED();
-#endif
-  }
-
-  if (!base::PathExists(path))
-    base::CreateDirectory(path);
-
-  return path;
-}
-
 }  // namespace filesystem