mojo: Sketch a profile application.

components/profile_service/profile_app.h

+// Copyright 2016 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.
+
+#ifndef COMPONENTS_PROFILE_SERVICE_PROFILE_APP_H_
+#define COMPONENTS_PROFILE_SERVICE_PROFILE_APP_H_
+
+#include "components/filesystem/lock_table.h"
+#include "components/leveldb/public/interfaces/leveldb.mojom.h"
+#include "components/profile_service/public/interfaces/profile.mojom.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "mojo/services/tracing/public/cpp/tracing_impl.h"
+#include "mojo/shell/public/cpp/interface_factory.h"
+#include "mojo/shell/public/cpp/shell_client.h"
+
+namespace filesystem {
+class LockTable;
+}
+
+namespace profile {
+
+scoped_ptr<mojo::ShellClient> CreateProfileApp();
+
+// Application which hands off per-profile services.
+//
+// This Application serves ProfileService, and serves LevelDBService since most
+// of the users of leveldb will want to write directly to the Directory
+// provided by the ProfileService; we want file handling to be done in the same
+// process to minimize IPC.
+//
+// In the future, this application will probably also offer any service that
+// most Profile using applications will need, such as preferences.
+class ProfileApp : public mojo::ShellClient,
+                   public mojo::InterfaceFactory<ProfileService>,
+                   public mojo::InterfaceFactory<leveldb::LevelDBService> {
+ public:
+  ProfileApp();
+  ~ProfileApp() override;
+
+  // Currently, ProfileApp is run from within the chrome process. This means it
+  // that the ApplicationLoader is registered during MojoShellContext startup,
+  // even though the application itself is not started. As soon as a
+  // BrowserContext is created, the BrowserContext will choose a |user_id| for
+  // itself and call us to register the mapping from |user_id| to
+  // |profile_data_dir|.
+  //
+  // This data is then accessed when we get our Initialize() call.
+  //
+  // TODO(erg): This is a temporary hack until we redo how we initialize mojo
+  // applications inside of chrome in general; this system won't work once
+  // ProfileApp gets put in its own sandboxed process.
+  static void AssociateMojoUserIDWithProfileDir(
+      uint32_t user_id,
+      const base::FilePath& profile_data_dir);
+
+ private:
+  // |ShellClient| override:
+  void Initialize(mojo::Connector* connector,
+                  const std::string& url,
+                  uint32_t id,
+                  uint32_t user_id) override;
+  bool AcceptConnection(mojo::Connection* connection) override;
+
+  // |InterfaceFactory<ProfileService>| implementation:
+  void Create(mojo::Connection* connection,
+              mojo::InterfaceRequest<ProfileService> request) override;
+
+  // |InterfaceFactory<LevelDBService>| implementation:
+  void Create(mojo::Connection* connection,
+              mojo::InterfaceRequest<leveldb::LevelDBService> request) override;
+
+  mojo::TracingImpl tracing_;
+
+  scoped_ptr<ProfileService> profile_service_;
+  mojo::BindingSet<ProfileService> profile_bindings_;
+
+  scoped_ptr<leveldb::LevelDBService> leveldb_service_;
+  mojo::BindingSet<leveldb::LevelDBService> leveldb_bindings_;
+
+  scoped_ptr<filesystem::LockTable> lock_table_;
+
+  base::FilePath profile_data_dir_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProfileApp);
+};
+
+}  // namespace profile
+
+#endif  // COMPONENTS_PROFILE_SERVICE_PROFILE_APP_H_