Mojo: Internalize ServiceConnector<>

mojo/public/cpp/shell/application.h

 // Copyright 2014 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 MOJO_PUBLIC_SHELL_APPLICATION_H_
 #define MOJO_PUBLIC_SHELL_APPLICATION_H_
 
 #include <vector>
 
-#include "mojo/public/cpp/shell/service.h"
+#include "mojo/public/cpp/shell/connect.h"
+#include "mojo/public/cpp/shell/lib/service_connector.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/public/interfaces/shell/shell.mojom.h"
 
 namespace mojo {
 
+// Utility class for creating ShellClients that vend service instances.
+// To use define a class that implements your specific server api, e.g. FooImpl
+// to implement a service named Foo.
+// That class must subclass an InterfaceImpl specialization.
+//
+// If there is context that is to be shared amongst all instances, define a
+// constructor with that class as its only argument, otherwise define an empty
+// constructor.
+//
+// class FooImpl : public InterfaceImpl<Foo> {
+//  public:
+//   FooImpl() {}
+// };
+//
+// or
+//
+// class BarImpl : public InterfaceImpl<Bar> {
+//  public:
+//   // context will remain valid for the lifetime of BarImpl.
+//   BarImpl(BarContext* context) : context_(context) {}
+//  private:
+//   BarContext* context;
+// };
+//
+// Create an Application instance that collects any service implementations.
+//
+// Application app(shell_handle);
+// app.AddService<FooImpl>();
+//
+// BarContext context;
+// app.AddService<BarImpl>(&context);
+//
+//
 class Application : public internal::ServiceConnectorBase::Owner {
  public:
   explicit Application(ScopedMessagePipeHandle shell_handle);
   explicit Application(MojoHandle shell_handle);
   virtual ~Application();
 
-  // internal::ServiceConnectorBase::Owner methods.
-  // Takes ownership of |service_connector|.
-  virtual void AddServiceConnector(
-      internal::ServiceConnectorBase* service_connector) MOJO_OVERRIDE;
-  virtual void RemoveServiceConnector(
-      internal::ServiceConnectorBase* service_connector) MOJO_OVERRIDE;
+  template <typename Impl, typename Context>
+  void AddService(Context* context) {
+    AddServiceConnector(new internal::ServiceConnector<Impl, Context>(context));
+  }
+
+  template <typename Impl>
+  void AddService() {
+    AddServiceConnector(new internal::ServiceConnector<Impl, void>(NULL));
+  }
 
   template <typename Interface>
   void ConnectTo(const std::string& url, InterfacePtr<Interface>* ptr) {
     mojo::ConnectTo(shell(), url, ptr);
   }
 
  protected:
   // ShellClient methods.
+  // Override this to dispatch to correct service when there's more than one.
+  // TODO(davemoore): Augment this with name registration.
   virtual void AcceptConnection(const mojo::String& url,
                                 ScopedMessagePipeHandle client_handle)
       MOJO_OVERRIDE;
 
  private:
+  // internal::ServiceConnectorBase::Owner methods.
+  // Takes ownership of |service_connector|.
+  virtual void AddServiceConnector(
+      internal::ServiceConnectorBase* service_connector) MOJO_OVERRIDE;
+  virtual void RemoveServiceConnector(
+      internal::ServiceConnectorBase* service_connector) MOJO_OVERRIDE;
+
   typedef std::vector<internal::ServiceConnectorBase*> ServiceConnectorList;
   ServiceConnectorList service_connectors_;
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_SHELL_APPLICATION_H_