extensions/browser/mojo/keep_alive_impl.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 EXTENSIONS_BROWSER_MOJO_KEEP_ALIVE_IMPL_H_
   6 #define EXTENSIONS_BROWSER_MOJO_KEEP_ALIVE_IMPL_H_
   7
   8 #include "base/callback.h"
   9 #include "base/scoped_observer.h"
  10 #include "extensions/browser/extension_registry_observer.h"
  11 #include "extensions/common/mojo/keep_alive.mojom.h"
  12 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
  13 #include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
  14
  15 namespace content {
  16 class BrowserContext;
  17 }
  18
  19 namespace extensions {
  20 class Extension;
  21
  22 // An RAII mojo service implementation for extension keep alives. This adds a
  23 // keep alive on construction and removes it on destruction.
  24 class KeepAliveImpl : public KeepAlive, public ExtensionRegistryObserver {
  25  public:
  26   // Create a keep alive for |extension| running in |context| and connect it to
  27   // |request|. When the requester closes its pipe, the keep alive ends.
  28   static void Create(content::BrowserContext* context,
  29                      const Extension* extension,
  30                      mojo::InterfaceRequest<KeepAlive> request);
  31
  32  private:
  33   KeepAliveImpl(content::BrowserContext* context,
  34                 const Extension* extension,
  35                 mojo::InterfaceRequest<KeepAlive> request);
  36   ~KeepAliveImpl() override;
  37
  38   // ExtensionRegistryObserver overrides.
  39   void OnExtensionUnloaded(content::BrowserContext* browser_context,
  40                            const Extension* extension,
  41                            UnloadedExtensionInfo::Reason reason) override;
  42   void OnShutdown(ExtensionRegistry* registry) override;
  43
  44   // Invoked when the mojo connection is disconnected.
  45   void OnDisconnected();
  46
  47   content::BrowserContext* context_;
  48   const Extension* extension_;
  49   ScopedObserver<ExtensionRegistry, KeepAliveImpl> extension_registry_observer_;
  50   mojo::StrongBinding<KeepAlive> binding_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(KeepAliveImpl);
  53 };
  54
  55 }  // namespace extensions
  56
  57 #endif  // EXTENSIONS_BROWSER_MOJO_KEEP_ALIVE_IMPL_H_