mojo/shell/dynamic_service_runner.h

   1 // Copyright 2014 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 MOJO_SHELL_DYNAMIC_SERVICE_RUNNER_H_
   6 #define MOJO_SHELL_DYNAMIC_SERVICE_RUNNER_H_
   7
   8 #include "base/callback_forward.h"
   9 #include "base/macros.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "mojo/public/cpp/system/core.h"
  12
  13 namespace base {
  14 class FilePath;
  15 }
  16
  17 namespace mojo {
  18 namespace shell {
  19
  20 class Context;
  21
  22 // Abstraction for loading a service (from the file system) and running it (on
  23 // another thread or in a separate process).
  24 class DynamicServiceRunner {
  25  public:
  26   virtual ~DynamicServiceRunner() {}
  27
  28   // Takes ownership of the file at |app_path|. Loads the app in that file and
  29   // runs it on some other thread/process. |app_completed_callback| is posted
  30   // (to the thread on which |Start()| was called) after |MojoMain()| completes.
  31   virtual void Start(const base::FilePath& app_path,
  32                      ScopedMessagePipeHandle service_handle,
  33                      const base::Closure& app_completed_callback) = 0;
  34 };
  35
  36 class DynamicServiceRunnerFactory {
  37  public:
  38   virtual ~DynamicServiceRunnerFactory() {}
  39   virtual scoped_ptr<DynamicServiceRunner> Create(Context* context) = 0;
  40 };
  41
  42 // A generic factory.
  43 template <class DynamicServiceRunnerImpl>
  44 class DynamicServiceRunnerFactoryImpl : public DynamicServiceRunnerFactory {
  45  public:
  46   DynamicServiceRunnerFactoryImpl() {}
  47   virtual ~DynamicServiceRunnerFactoryImpl() {}
  48   virtual scoped_ptr<DynamicServiceRunner> Create(Context* context) OVERRIDE {
  49     return scoped_ptr<DynamicServiceRunner>(
  50         new DynamicServiceRunnerImpl(context));
  51   }
  52 };
  53
  54 }  // namespace shell
  55 }  // namespace mojo
  56
  57 #endif  // MOJO_SHELL_DYNAMIC_SERVICE_RUNNER_H_