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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMECAST_EXTERNAL_MOJO_EXTERNAL_SERVICE_SUPPORT_CHROMIUM_SERVICE_H_
#define CHROMECAST_EXTERNAL_MOJO_EXTERNAL_SERVICE_SUPPORT_CHROMIUM_SERVICE_H_
#include <memory>
#include <string>
#include "chromecast/external_mojo/public/mojom/connector.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/system/message_pipe.h"
#include "services/service_manager/public/cpp/identity.h"
#include "services/service_manager/public/cpp/service.h"
#include "services/service_manager/public/mojom/service.mojom.h"
namespace service_manager {
class Connector;
class Service;
} // namespace service_manager
namespace chromecast {
namespace external_service_support {
class ExternalConnector;
// Provides a wrapper for a Chromium ServiceManager-based service to run in
// an external (non-Chromium) process.
class ChromiumServiceWrapper : public external_mojo::mojom::ExternalService {
public:
ChromiumServiceWrapper(
ExternalConnector* connector,
mojo::Remote<service_manager::mojom::Service> service_remote,
std::unique_ptr<service_manager::Service> chromium_service,
const std::string& service_name);
ChromiumServiceWrapper(const ChromiumServiceWrapper&) = delete;
ChromiumServiceWrapper& operator=(const ChromiumServiceWrapper&) = delete;
~ChromiumServiceWrapper() override;
private:
// external_mojo::mojom::ExternalService implementation:
void OnBindInterface(const std::string& interface_name,
mojo::ScopedMessagePipeHandle interface_pipe) override;
const mojo::Remote<service_manager::mojom::Service> service_remote_;
const std::unique_ptr<service_manager::Service> chromium_service_;
mojo::Receiver<external_mojo::mojom::ExternalService> service_receiver_{this};
};
// Creates a ServiceRequest (analogous to one created by Chromium
// ServiceManager) for use in creating Chromium Mojo services in an external
// process. |service_remote| will be filled in with a pointer for the service,
// which should be bassed to ChromiumServiceWrapper's constructor. |identity| is
// the desired identity of the service to be created (ie, what will be returned
// from ServiceBinding::identity() once the service binding is created). If you
// don't care about the identity, just use the default.
mojo::PendingReceiver<service_manager::mojom::Service>
CreateChromiumServiceReceiver(
ExternalConnector* connector,
mojo::Remote<service_manager::mojom::Service>* service_remote,
service_manager::Identity identity = service_manager::Identity());
// Creates a service_manager::Connector instance from an external service
// ExternalConnector.
std::unique_ptr<service_manager::Connector> CreateChromiumConnector(
ExternalConnector* connector);
// Convenience helper for services that only take a ServiceRequest param in the
// constructor. The |name| is the desired service name.
template <typename T>
std::unique_ptr<ChromiumServiceWrapper> CreateChromiumService(
ExternalConnector* connector,
const std::string& name) {
mojo::Remote<service_manager::mojom::Service> service_remote;
auto receiver = CreateChromiumServiceReceiver(connector, &service_remote);
return std::make_unique<ChromiumServiceWrapper>(
connector, std::move(service_remote),
std::make_unique<T>(std::move(receiver)), name);
}
} // namespace external_service_support
} // namespace chromecast
#endif // CHROMECAST_EXTERNAL_MOJO_EXTERNAL_SERVICE_SUPPORT_CHROMIUM_SERVICE_H_
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