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// 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 CONTENT_PUBLIC_COMMON_SERVICE_REGISTRY_H_
#define CONTENT_PUBLIC_COMMON_SERVICE_REGISTRY_H_
#include <string>
#include <utility>
#include "base/bind.h"
#include "base/callback.h"
#include "base/strings/string_piece.h"
#include "content/common/content_export.h"
#include "mojo/public/cpp/bindings/interface_ptr.h"
#include "mojo/public/cpp/bindings/interface_request.h"
#include "mojo/public/cpp/system/core.h"
namespace content {
// A ServiceRegistry exposes local services that have been added using
// AddService to a paired remote ServiceRegistry and provides local access to
// services exposed by the remote ServiceRegistry through
// ConnectToRemoteService.
class CONTENT_EXPORT ServiceRegistry {
public:
virtual ~ServiceRegistry() {}
// Make the service created by |service_factory| available to the remote
// ServiceProvider. In response to each request for a service,
// |service_factory| will be run with an InterfaceRequest<Interface>
// representing that request. Adding a factory for an already registered
// service will override the factory. Existing connections to the service are
// unaffected.
template <typename Interface>
void AddService(const base::Callback<void(mojo::InterfaceRequest<Interface>)>
service_factory) {
AddService(Interface::Name_,
base::Bind(&ServiceRegistry::ForwardToServiceFactory<Interface>,
service_factory));
}
virtual void AddService(
const std::string& service_name,
const base::Callback<void(mojo::ScopedMessagePipeHandle)>
service_factory) = 0;
// Remove future access to the service implementing Interface. Existing
// connections to the service are unaffected.
template <typename Interface>
void RemoveService() {
RemoveService(Interface::Name_);
}
virtual void RemoveService(const std::string& service_name) = 0;
// Connect to an interface provided by the remote service provider.
template <typename Interface>
void ConnectToRemoteService(mojo::InterfaceRequest<Interface> ptr) {
ConnectToRemoteService(Interface::Name_, ptr.PassMessagePipe());
}
virtual void ConnectToRemoteService(const base::StringPiece& name,
mojo::ScopedMessagePipeHandle handle) = 0;
private:
template <typename Interface>
static void ForwardToServiceFactory(
const base::Callback<void(mojo::InterfaceRequest<Interface>)>
service_factory,
mojo::ScopedMessagePipeHandle handle) {
service_factory.Run(mojo::MakeRequest<Interface>(std::move(handle)));
}
};
} // namespace content
#endif // CONTENT_PUBLIC_COMMON_SERVICE_REGISTRY_H_
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