mojo/shell/static_application_loader.h

   1 // Copyright 2015 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_STATIC_APPLICATION_LOADER_H_
   6 #define MOJO_SHELL_STATIC_APPLICATION_LOADER_H_
   7
   8 #include <list>
   9
  10 #include "base/callback.h"
  11 #include "base/macros.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "mojo/shell/application_loader.h"
  14
  15 namespace base {
  16 class SimpleThread;
  17 }
  18
  19 namespace mojo {
  20 class ApplicationDelegate;
  21 }
  22
  23 namespace mojo {
  24 namespace shell {
  25
  26 // An ApplicationLoader which loads a single type of app from a given
  27 // ApplicationDelegate factory. A Load() request is fulfilled by creating an
  28 // instance of the app on a new thread. Only one instance of the app will run at
  29 // a time. Any Load requests received while the app is running will be dropped.
  30 class StaticApplicationLoader : public mojo::shell::ApplicationLoader {
  31  public:
  32   using ApplicationFactory =
  33       base::Callback<scoped_ptr<mojo::ApplicationDelegate>()>;
  34
  35   // Constructs a static loader for |factory|.
  36   explicit StaticApplicationLoader(const ApplicationFactory& factory);
  37
  38   // Constructs a static loader for |factory| with a closure that will be called
  39   // when the loaded application quits.
  40   StaticApplicationLoader(const ApplicationFactory& factory,
  41                           const base::Closure& quit_callback);
  42
  43   ~StaticApplicationLoader() override;
  44
  45   // mojo::shell::ApplicationLoader:
  46   void Load(const GURL& url,
  47             mojo::InterfaceRequest<mojo::Application> request) override;
  48
  49  private:
  50   void StopAppThread();
  51
  52   // The factory used t create new instances of the application delegate.
  53   ApplicationFactory factory_;
  54
  55   // If not null, this is run when the loaded application quits.
  56   base::Closure quit_callback_;
  57
  58   // Thread for the application if currently running.
  59   scoped_ptr<base::SimpleThread> thread_;
  60
  61   base::WeakPtrFactory<StaticApplicationLoader> weak_factory_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(StaticApplicationLoader);
  64 };
  65
  66 }  // namespace shell
  67 }  // namespace mojo
  68
  69 #endif  // MOJO_SHELL_STATIC_APPLICATION_LOADER_H_