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